:root{
  --bg:#f6f8fb;--card:#ffffff;--ink:#1f2933;--sub:#5b6b7b;--line:#e3e9f0;
  --accent:#d97706;--accent-soft:#fef3c7;
  --shadow-sm:0 1px 3px rgba(0,0,0,.05);
  --shadow-md:0 4px 12px rgba(0,0,0,.08);
  --shadow-lg:0 8px 24px rgba(0,0,0,.10);
  --radius:16px;--radius-sm:10px;--radius-pill:999px;
  --navbg:rgba(247,248,250,.94);
  --blue:#d97706;--blue-s:#fef3c7;
  --green:#059669;--green-soft:#ecfdf5;
  --tech:#2563eb;--eng:#059669;--lang:#d97706;--create:#7c3aed;--rest:#94a3b8;--work:#64748b;
}
[data-theme="dark"]{
  --bg:#0e1320;--card:#161c2b;--ink:#e7ecf5;--sub:#9aa7ba;--line:#2a3346;
  --accent:#fbbf24;--accent-soft:rgba(251,191,36,.12);
  --shadow-sm:0 1px 3px rgba(0,0,0,.2);
  --shadow-md:0 4px 12px rgba(0,0,0,.25);
  --shadow-lg:0 8px 24px rgba(0,0,0,.3);
  --navbg:rgba(14,19,32,.92);
  --blue:#fbbf24;--blue-s:rgba(251,191,36,.12);
  --green:#34d399;--green-soft:rgba(52,211,153,.12);
  --tech:#60a5fa;--eng:#34d399;--lang:#fbbf24;--create:#c4b5fd;--rest:#64748b;--work:#94a3b8;
}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:-apple-system,"PingFang SC","Microsoft YaHei",Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--ink);line-height:1.7;font-size:14.5px;-webkit-font-smoothing:antialiased}
a{color:var(--accent);text-decoration:none}
.wrap{max-width:1180px;margin:0 auto;padding:0 20px}
html{scroll-behavior:smooth}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

/* Nav */
.sitenav{position:sticky;top:0;z-index:30;background:var(--navbg);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--line);padding:12px 0}
.sitenav .wrap{display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.sitenav .back{font-weight:700;color:var(--accent);font-size:14px;white-space:nowrap}
.sitenav .sib{display:flex;gap:8px;flex-wrap:wrap;margin-left:auto}
.sitenav .sib a{font-size:13px;padding:6px 14px;border:1px solid var(--line);border-radius:var(--radius-pill);color:var(--sub);background:var(--card);font-weight:600;transition:.15s;white-space:nowrap}
.sitenav .sib a:hover{border-color:var(--accent);color:var(--accent)}
.sitenav .sib a.active{background:var(--accent);color:#fff;border-color:var(--accent)}

/* Hero */
header.hero{background:linear-gradient(135deg,#78350f 0%,#d97706 50%,#fbbf24 100%);color:#fff;padding:38px 0 30px;position:relative;overflow:hidden}
header.hero::after{content:"";position:absolute;inset:0;background:radial-gradient(ellipse at 70% 100%,rgba(251,191,36,.2),transparent 60%);pointer-events:none}
.hero h1{font-size:26px;font-weight:800;letter-spacing:.3px}
.hero p{margin-top:8px;opacity:.93;max-width:820px;font-size:14px}

/* Mode Toggle */
.mode-toggle{display:inline-flex;gap:0;margin-top:18px;border:2px solid rgba(255,255,255,.3);border-radius:var(--radius-pill);overflow:hidden}
.mode-toggle button{padding:10px 24px;font-size:14px;font-weight:700;border:none;cursor:pointer;transition:.2s;background:transparent;color:rgba(255,255,255,.7)}
.mode-toggle button.active{background:#fff;color:var(--accent);box-shadow:0 2px 8px rgba(0,0,0,.12)}
.mode-toggle button:hover:not(.active){background:rgba(255,255,255,.15);color:#fff}

/* Daily Rhythm */
.rhythm-section{margin:24px 0}
.rhythm-section h2{font-size:18px;font-weight:700;margin-bottom:14px}
.rhythm-grid{display:flex;gap:8px;overflow-x:auto;padding-bottom:8px;-webkit-overflow-scrolling:touch}
.rhythm-card{min-width:100px;flex-shrink:0;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:12px 10px;text-align:center;transition:.15s}
.rhythm-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-sm);border-color:var(--accent)}
.rhythm-card .time{font-size:11px;color:var(--sub);font-weight:600}
.rhythm-card .dur{font-size:18px;font-weight:800;margin:4px 0}
.rhythm-card .label{font-size:12px;font-weight:600}
.rhythm-card.tech{border-left:4px solid var(--tech)}
.rhythm-card.tech .dur{color:var(--tech)}
.rhythm-card.eng{border-left:4px solid var(--eng)}
.rhythm-card.eng .dur{color:var(--eng)}
.rhythm-card.lang{border-left:4px solid var(--lang)}
.rhythm-card.lang .dur{color:var(--lang)}
.rhythm-card.create{border-left:4px solid var(--create)}
.rhythm-card.create .dur{color:var(--create)}
.rhythm-card.review{border-left:4px solid var(--orange)}
.rhythm-card.review .dur{color:var(--orange)}
.rhythm-card.rest,.rhythm-card.meal,.rhythm-card.work,.rhythm-card.sleep,.rhythm-card.break,.rhythm-card.free{opacity:.6}
.rhythm-card.rest{border-left:4px solid var(--rest)}
.rhythm-card.work{border-left:4px solid var(--work)}
.rhythm-card.sleep{border-left:4px solid var(--slate)}
.rhythm-stats{display:flex;gap:16px;flex-wrap:wrap;margin-top:14px;font-size:13px;color:var(--sub)}
.rhythm-stats b{color:var(--ink)}
.rhythm-stats .pill{display:inline-block;padding:3px 10px;border-radius:999px;font-weight:700;font-size:12px}
.pill.tech{background:var(--blue-s);color:var(--tech)}
.pill.eng{background:var(--green-soft);color:var(--eng)}

/* Week Accordion */
.week-list{margin:24px 0}

/* ===== 计划总览表（W0 → S3）===== */
.plan-head{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;margin:30px 0 14px}
.plan-title{font-size:20px;font-weight:800;color:var(--accent);margin:0}
.plan-actions{display:flex;gap:8px}
.plan-btn{font-size:12px;font-weight:700;color:var(--accent);background:var(--card);border:1px solid var(--line);border-radius:999px;padding:6px 14px;cursor:pointer;transition:.15s}
.plan-btn:hover{border-color:var(--accent);box-shadow:var(--shadow-sm)}
.plan-overview{margin:0 0 18px;overflow-x:auto;-webkit-overflow-scrolling:touch}
.plan-tbl{width:100%;border-collapse:collapse;font-size:13px;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.plan-tbl th,.plan-tbl td{padding:9px 12px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top;line-height:1.4}
.plan-tbl th{background:var(--accent-soft);color:var(--accent);font-weight:800;white-space:nowrap}
.plan-tbl tbody tr{cursor:pointer;transition:.12s}
.plan-tbl tbody tr:hover td{background:rgba(217,119,6,.07)}
.plan-tbl .cw{font-weight:800;color:var(--accent);white-space:nowrap;font-family:ui-monospace,"SF Mono",Menlo,Consolas,monospace}
.plan-tbl .cp{white-space:nowrap;color:var(--sub)}
.plan-tbl .cd{white-space:nowrap;color:var(--sub)}
.week-item{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);margin-bottom:12px;overflow:hidden;transition:.15s}
.week-item:hover{border-color:var(--accent);box-shadow:var(--shadow-md)}
.week-head{display:flex;align-items:center;gap:12px;padding:16px 18px;cursor:pointer;user-select:none}
.week-head .wnum{font-size:22px;font-weight:800;color:var(--accent);min-width:48px;font-family:ui-monospace,"SF Mono",Menlo,Consolas,monospace}
.week-head .winfo{flex:1}
.week-head .wtitle{font-size:15px;font-weight:700}
.week-head .wdate{font-size:12px;color:var(--sub);margin-top:2px}
.week-head .wmeta{font-size:12px;color:var(--sub);text-align:right;white-space:nowrap}
.week-head .arrow{font-size:14px;color:var(--sub);transition:.2s}
.week-item.open .arrow{transform:rotate(90deg)}
.week-body{display:none;padding:0 18px 16px}
.week-item.open .week-body{display:block}

/* Day Card */
.day-card{background:var(--bg);border:1px solid var(--line);border-radius:var(--radius-sm);margin-top:10px;overflow:hidden;transition:.15s}
.day-card:hover{border-color:var(--accent)}
.day-head{display:flex;align-items:center;gap:10px;padding:12px 14px;cursor:pointer;user-select:none}
.day-head .dnum{font-size:14px;font-weight:800;color:var(--accent);min-width:60px}
.day-head .dtitle{flex:1;font-size:13px;font-weight:600}
.day-head .dtag{font-size:11px;font-weight:700;padding:3px 8px;border-radius:6px;white-space:nowrap}
.dtag.verify{background:var(--pink-soft);color:var(--pink)}
.dtag.rest{background:var(--line);color:var(--sub)}
.dtag.normal{background:var(--accent-soft);color:var(--accent)}
.day-head .darrow{font-size:12px;color:var(--sub);transition:.2s}
.day-card.open .darrow{transform:rotate(90deg)}
.day-body{display:none;padding:0 14px 14px}
.day-card.open .day-body{display:block}
.alts{margin-top:10px;background:var(--accent-soft);border:1px solid var(--line);border-radius:10px;padding:10px 12px}
.alts-h{font-size:12px;font-weight:800;color:var(--accent);margin-bottom:6px}
.alt-item{font-size:12px;color:var(--sub);line-height:1.7}
.alt-item b{color:var(--ink)}
.alt-item a{color:var(--accent);word-break:break-all}

/* Time Slot */
.slot{display:flex;gap:10px;padding:10px 0;border-top:1px solid var(--line)}
.slot:first-child{border-top:none}
.slot .stime{min-width:110px;font-size:12px;font-weight:700;color:var(--sub);padding-top:2px}
.slot .stime .dur{display:block;font-size:11px;color:var(--slate)}
.slot .scontent{flex:1;font-size:13px}
.slot .scontent .stitle{font-weight:600;color:var(--ink)}
.slot .scontent .ssrc{font-size:11px;color:var(--accent);font-weight:600;margin-top:2px}
.slot .scontent .ssrc .src-line{line-height:1.7}
.slot .scontent .ssrc .src-main{color:var(--accent);font-weight:600}
.slot .scontent .ssrc .src-alt{color:var(--sub);font-weight:500;padding-left:1.2em}
.slot .scontent .ssrc .src-alt b{color:var(--ink);font-weight:600}
.slot.tech{border-left:3px solid var(--tech);padding-left:8px}
.slot.eng{border-left:3px solid var(--eng);padding-left:8px}
.slot.lang{border-left:3px solid var(--lang);padding-left:8px}
.slot.review{border-left:3px solid var(--orange);padding-left:8px}
.slot.other{border-left:3px solid var(--rest);padding-left:8px;opacity:.7}

/* Completion Standard */
.std{margin-top:10px;padding:10px 14px;background:var(--green-soft);border-radius:8px;font-size:12px;color:var(--green);font-weight:600}
.std::before{content:"✅ 完成标准："}

/* 章节清单（主课 + 备选，每天底部一次性渲染） */
.chap-wrap{margin-top:10px;padding:10px 14px;background:var(--accent-soft);border:1px solid var(--accent-line);border-radius:10px}
.chap-entry{margin:6px 0;font-size:12px;color:var(--ink)}
.chap-head{font-weight:600;line-height:1.5}
.chap-head .ch-tag{color:var(--accent);font-weight:700;font-size:11px;margin-left:4px}
.ch-box{margin:4px 0 4px 2px}
.ch-box>summary{cursor:pointer;color:var(--sub);font-size:11px;user-select:none}
.ch-box>summary:hover{color:var(--accent)}
.ch-box>ul{margin:6px 0 2px;padding-left:18px}
.ch-box>ul>li{font-size:11px;color:var(--sub);line-height:1.6}

/* Verify Day */
.verify-content{padding:14px;background:var(--pink-soft);border-radius:8px;font-size:13px;color:var(--pink);font-weight:600}
.verify-content::before{content:"🔴 验证日 · "}

/* Branch Section */
.branch-section{margin:30px 0}
.branch-section h2{font-size:18px;font-weight:700;margin-bottom:6px}
.branch-section .desc{font-size:13px;color:var(--sub);margin-bottom:14px}
.branch-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:12px}
.branch-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:16px;transition:.15s}
.branch-card:hover{border-color:var(--accent);transform:translateY(-2px);box-shadow:var(--shadow-md)}
.branch-card .bicon{font-size:24px}
.branch-card .btitle{font-size:15px;font-weight:700;margin:6px 0 4px}
.branch-card .baxis{font-size:11px;font-weight:700;color:var(--accent);background:var(--accent-soft);display:inline-block;padding:2px 8px;border-radius:6px}
.branch-card .bdesc{font-size:12px;color:var(--sub);margin-top:6px}

/* Dark theme overrides */
[data-theme="dark"] .mode-toggle button.active{background:#fff;color:var(--accent)}
[data-theme="dark"] .rhythm-card{background:var(--card);border-color:var(--line)}
[data-theme="dark"] .rhythm-card:hover{border-color:var(--accent)}

/* Footer */
footer{text-align:center;color:var(--sub);font-size:12.5px;padding:30px 0}

/* Print */
@media print{
  .sitenav,.mode-toggle{display:none!important}
  body{background:#fff;color:#000;font-size:12px}
  .week-item,.week-body,.day-card,.day-body{display:block!important}
  .slot,.std,.verify-content{-webkit-print-color-adjust:exact;print-color-adjust:exact}
  .day-card,.week-item{break-inside:avoid}
}
@media(max-width:560px){.hero h1{font-size:20px}.rhythm-card{min-width:84px}}