/* ===== CSP-J 代码阅读通关系统 · 深色主题 ===== */
*{margin:0;padding:0;box-sizing:border-box}
:root{
  --bg:#070b1d; --bg2:#0b1030; --panel:#101736; --panel2:#141c42;
  --line:rgba(99,102,241,.18); --line2:rgba(103,232,249,.15);
  --ink:#e8ecff; --ink2:#aab3d6; --ink3:#6b759f;
  --indigo:#6366f1; --cyan:#22d3ee; --cyan2:#67e8f9;
  --green:#34d399; --red:#f87171; --amber:#fbbf24; --orange:#fb923c;
  --sbw:236px;
}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--ink);font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",-apple-system,sans-serif;font-size:15px;line-height:1.75}
::selection{background:rgba(34,211,238,.35)}
code{font-family:"JetBrains Mono","SFMono-Regular",Consolas,monospace;background:rgba(34,211,238,.12);color:var(--cyan2);padding:1px 7px;border-radius:5px;font-size:.92em}
b{color:#fff}

/* ===== 顶栏 ===== */
.topbar{position:fixed;inset:0 0 auto 0;height:56px;z-index:100;display:flex;align-items:center;gap:14px;padding:0 18px;background:rgba(7,11,29,.88);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.topbar .logo{font-size:17px;font-weight:800;background:linear-gradient(90deg,#a5b4fc,#67e8f9);-webkit-background-clip:text;background-clip:text;color:transparent;white-space:nowrap}
.topbar .badge-ver{font-size:11px;color:#c7d2fe;background:rgba(99,102,241,.18);border:1px solid rgba(99,102,241,.35);padding:3px 10px;border-radius:99px;white-space:nowrap}
.topbar .sp{flex:1}
.tbtn{display:inline-flex;align-items:center;gap:6px;font-size:12.5px;color:var(--ink2);background:rgba(99,102,241,.12);border:1px solid var(--line);padding:7px 13px;border-radius:9px;cursor:pointer;transition:.2s;white-space:nowrap;text-decoration:none}
.tbtn:hover{color:#fff;border-color:var(--indigo);background:rgba(99,102,241,.25)}
.tbtn.on{color:#fde68a;border-color:rgba(251,191,36,.5);background:rgba(251,191,36,.12)}
.tbtn.link{color:#a5f3fc;border-color:rgba(34,211,238,.35);background:rgba(34,211,238,.08)}

/* ===== 侧边栏 ===== */
.sidebar{position:fixed;top:56px;left:0;bottom:0;width:var(--sbw);overflow-y:auto;padding:16px 12px 30px;background:linear-gradient(180deg,#0a0f2b,#080c22);border-right:1px solid var(--line)}
.sb-label{font-size:11px;color:var(--ink3);letter-spacing:2px;padding:4px 8px 10px}
.modnav{display:flex;flex-direction:column;gap:4px}
.modnav a{display:flex;align-items:center;gap:9px;padding:9px 10px;border-radius:10px;color:var(--ink2);text-decoration:none;font-size:13.5px;transition:.15s;border:1px solid transparent}
.modnav a:hover{background:rgba(99,102,241,.12);color:#fff}
.modnav a.cur{background:linear-gradient(90deg,rgba(99,102,241,.28),rgba(34,211,238,.12));color:#fff;border-color:rgba(99,102,241,.4)}
.modnav .mi{font-size:15px;width:20px;text-align:center}
.modnav .mc{margin-left:auto;font-size:10.5px;color:var(--ink3);background:rgba(255,255,255,.06);padding:2px 8px;border-radius:99px}
.modnav a.cur .mc{color:#a5f3fc;background:rgba(34,211,238,.15)}
.locator{margin-top:22px;border-top:1px dashed rgba(255,255,255,.08);padding-top:14px}
.loc-stats{display:flex;justify-content:space-between;font-size:12px;color:var(--ink3);padding:2px 8px 10px}
.loc-stats b{color:var(--green);font-weight:700}
.loc-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:6px;padding:0 4px}
.loc-grid a{display:flex;align-items:center;justify-content:center;height:30px;font-size:10.5px;color:var(--ink2);background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.05);border-radius:7px;text-decoration:none;transition:.15s;font-family:Consolas,monospace}
.loc-grid a:hover{border-color:var(--cyan);color:var(--cyan2)}
.loc-grid a.ok{background:rgba(52,211,153,.18);border-color:rgba(52,211,153,.5);color:#6ee7b7}
.loc-grid a.bad{background:rgba(248,113,113,.16);border-color:rgba(248,113,113,.5);color:#fca5a5}
.loc-grid a.doing{background:rgba(251,191,36,.14);border-color:rgba(251,191,36,.45);color:#fde68a}

/* ===== 主区 ===== */
.main{margin-left:var(--sbw);padding:76px 26px 80px}
.main>*{max-width:1240px;margin-left:auto;margin-right:auto}
.hero{position:relative;overflow:hidden;border-radius:20px;padding:34px 36px;margin-bottom:22px;background:linear-gradient(120deg,#1e1b4b 0%,#312e81 45%,#164e63 100%);border:1px solid rgba(129,140,248,.35);box-shadow:0 0 60px rgba(99,102,241,.15) inset}
.hero::after{content:"";position:absolute;right:-80px;top:-80px;width:320px;height:320px;border-radius:50%;background:radial-gradient(circle,rgba(34,211,238,.25),transparent 70%)}
.hero .pills{display:flex;gap:10px;margin-bottom:14px;flex-wrap:wrap}
.hero .pill{font-size:11.5px;padding:4px 13px;border-radius:99px;background:rgba(99,102,241,.25);border:1px solid rgba(129,140,248,.5);color:#c7d2fe}
.hero .pill.g{background:rgba(16,185,129,.18);border-color:rgba(52,211,153,.45);color:#6ee7b7}
.hero h1{font-size:29px;font-weight:900;letter-spacing:1px;margin-bottom:10px}
.hero p{color:#c3c9ee;font-size:13.5px;max-width:860px}
.hero .stats{display:flex;gap:14px;margin-top:20px;flex-wrap:wrap}
.hstat{flex:1;min-width:150px;background:rgba(7,11,29,.45);border:1px solid rgba(129,140,248,.25);border-radius:13px;padding:13px 16px}
.hstat b{font-size:21px;background:linear-gradient(90deg,#818cf8,#22d3ee);-webkit-background-clip:text;background-clip:text;color:transparent}
.hstat span{display:block;font-size:11.5px;color:var(--ink2);margin-top:2px}

/* 筛选条 */
.filterbar{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin:6px auto 26px}
.filterbar .lbl{font-size:13px;color:var(--ink3);margin-right:4px}
.ychip{font-size:12.5px;color:var(--ink2);background:var(--panel);border:1px solid var(--line);padding:6px 15px;border-radius:9px;cursor:pointer;transition:.15s}
.ychip:hover{color:#fff;border-color:var(--indigo)}
.ychip.on{background:linear-gradient(90deg,rgba(99,102,241,.4),rgba(34,211,238,.25));color:#fff;border-color:var(--indigo)}
.searchbox{margin-left:auto;display:flex;align-items:center;gap:7px;background:var(--panel);border:1px solid var(--line);border-radius:9px;padding:7px 13px;min-width:230px}
.searchbox input{flex:1;background:none;border:none;outline:none;color:var(--ink);font-size:13px}
.searchbox input::placeholder{color:var(--ink3)}

/* ===== 方法论精讲 ===== */
.know{border:1px solid var(--line);border-radius:16px;background:var(--panel);padding:6px 28px 22px;margin-bottom:26px}
.know-t{display:flex;align-items:center;gap:9px;font-size:15.5px;font-weight:800;color:var(--cyan2);padding:16px 0 4px;border-bottom:1px solid rgba(255,255,255,.07);margin-bottom:14px}
.know h4{font-size:15px;color:#7dd3fc;margin:22px 0 10px;font-weight:800}
.know ul{list-style:none}
.know li{position:relative;padding:5px 0 5px 20px;color:#c9d1f2;font-size:13.8px}
.know li::before{content:"▸";position:absolute;left:2px;color:var(--indigo)}
.tipbox{margin-top:20px;background:linear-gradient(120deg,rgba(251,191,36,.07),rgba(251,146,60,.04));border:1px solid rgba(251,191,36,.3);border-left:4px solid var(--amber);border-radius:13px;padding:16px 20px}
.tipbox-t{font-size:14px;font-weight:800;color:var(--amber);margin-bottom:8px}
.tipbox p{font-size:13px;color:#d9d2b8;padding:4px 0}

/* ===== 年份区块 ===== */
.yrsec{margin-bottom:36px;scroll-margin-top:70px}
.yrhead{border-radius:16px;padding:20px 26px;background:linear-gradient(120deg,rgba(99,102,241,.16),rgba(34,211,238,.07));border:1px solid var(--line);border-left:4px solid var(--indigo);margin-bottom:16px;display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.yrhead h2{font-size:19px;font-weight:800}
.yrhead .ysub{font-size:12.5px;color:var(--ink2)}
.yrhead .yscore{margin-left:auto;font-size:12px;color:var(--orange);font-weight:700;background:rgba(251,146,60,.1);border:1px solid rgba(251,146,60,.3);padding:4px 12px;border-radius:99px}

/* ===== 大题卡 ===== */
.bigcard{border:1px solid var(--line);border-radius:16px;background:var(--panel);margin-bottom:18px;scroll-margin-top:70px;overflow:hidden;transition:border-color .2s}
.bigcard.done-ok{border-color:rgba(52,211,153,.45)}
.bigcard.done-bad{border-color:rgba(248,113,113,.45)}
.bc-head{display:flex;align-items:center;gap:10px;flex-wrap:wrap;padding:16px 22px 12px}
.bc-no{font-family:Consolas,monospace;font-size:12px;font-weight:700;color:#a5b4fc;background:rgba(99,102,241,.2);border:1px solid rgba(99,102,241,.4);padding:3px 11px;border-radius:8px}
.bc-kind{font-size:11px;font-weight:700;padding:3px 11px;border-radius:8px}
.bc-kind.rd{color:#a5f3fc;background:rgba(34,211,238,.12);border:1px solid rgba(34,211,238,.35)}
.bc-kind.ws{color:#f0abfc;background:rgba(217,70,239,.12);border:1px solid rgba(217,70,239,.35)}
.bc-topic{font-size:15.5px;font-weight:800;color:#eef1ff}
.bc-prog{margin-left:auto;font-size:11.5px;color:var(--ink3);background:rgba(255,255,255,.05);padding:3px 11px;border-radius:99px;font-family:Consolas,monospace}
.bc-prog b{color:var(--cyan2)}
.bc-desc{padding:0 22px 12px;font-size:13.2px;color:var(--ink2)}
.bc-score{padding:0 22px 10px;font-size:11.5px;color:var(--ink3)}

/* 代码面板（带行号） */
.codepanel{margin:4px 22px 16px;background:#05081a;border:1px solid rgba(255,255,255,.09);border-radius:12px;overflow:auto;max-height:520px}
.codepanel table{border-collapse:collapse;width:100%;font-family:"JetBrains Mono",Consolas,monospace;font-size:12.8px;line-height:1.65}
.codepanel td{padding:0;vertical-align:top;white-space:pre}
.codepanel .ln{width:44px;min-width:44px;text-align:right;padding:0 12px 0 0;color:#3d4570;background:rgba(255,255,255,.025);border-right:1px solid rgba(255,255,255,.07);user-select:none;font-size:11.5px}
.codepanel .lc{padding:0 16px;color:#a5f3fc}
.codepanel tr:hover .lc{background:rgba(34,211,238,.05)}
.codepanel tr:hover .ln{color:#67e8f9}
.cmt{color:#5b6488}
.blank{color:var(--amber);font-weight:700}

/* ===== 子题 ===== */
.subq{border-top:1px dashed rgba(255,255,255,.08);padding:14px 22px 16px}
.subq .sq-head{display:flex;align-items:flex-start;gap:10px}
.sq-n{flex:none;font-family:Consolas,monospace;font-size:11px;font-weight:700;color:var(--ink3);background:rgba(255,255,255,.06);width:22px;height:22px;border-radius:6px;display:flex;align-items:center;justify-content:center;margin-top:2px}
.sq-type{flex:none;font-size:10.5px;font-weight:700;padding:2px 9px;border-radius:6px;margin-top:2px}
.sq-type.tf{color:#6ee7b7;background:rgba(52,211,153,.12);border:1px solid rgba(52,211,153,.35)}
.sq-type.ch{color:#c7d2fe;background:rgba(99,102,241,.18);border:1px solid rgba(99,102,241,.4)}
.sq-title{font-size:13.8px;font-weight:600;color:#eef1ff;flex:1}
.sq-score{flex:none;font-size:10.5px;color:var(--ink3)}
.qopts{display:flex;flex-direction:column;gap:8px;margin-top:11px}
.opt{display:flex;align-items:flex-start;gap:12px;padding:9px 15px;border-radius:11px;background:rgba(255,255,255,.035);border:1px solid rgba(255,255,255,.06);cursor:pointer;transition:.15s;font-size:13.5px;color:#d4daf5}
.opt:hover{border-color:rgba(34,211,238,.5);background:rgba(34,211,238,.06)}
.opt .ol{flex:none;width:24px;height:24px;border-radius:7px;background:rgba(255,255,255,.07);display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:700;color:var(--ink2)}
.subq.locked .opt{pointer-events:none}
.subq.locked .opt.right{background:rgba(52,211,153,.13);border-color:rgba(52,211,153,.6);color:#a7f3d0}
.subq.locked .opt.right .ol{background:var(--green);color:#052e1f}
.subq.locked .opt.wrongpick{background:rgba(248,113,113,.12);border-color:rgba(248,113,113,.55);color:#fecaca}
.subq.locked .opt.wrongpick .ol{background:var(--red);color:#450a0a}
.qana-btn{margin-top:11px;font-size:12px;color:var(--amber);background:rgba(251,191,36,.1);border:1px solid rgba(251,191,36,.3);padding:5px 14px;border-radius:8px;cursor:pointer;transition:.15s}
.qana-btn:hover{background:rgba(251,191,36,.2)}
.qana{display:none;margin-top:11px;background:#0a0f2a;border:1px solid rgba(52,211,153,.25);border-radius:11px;padding:13px 17px;font-size:13px;color:#c9d1f2}
.qana.open{display:block}
.qana .ansline{font-weight:800;color:var(--green);margin-bottom:6px}
.qhide{display:none}

/* 回到顶部 */
.gotop{position:fixed;right:22px;bottom:22px;width:42px;height:42px;border-radius:12px;background:linear-gradient(135deg,var(--indigo),var(--cyan));color:#fff;border:none;font-size:18px;cursor:pointer;opacity:0;pointer-events:none;transition:.25s;z-index:90;box-shadow:0 6px 20px rgba(99,102,241,.4)}
.gotop.show{opacity:1;pointer-events:auto}

/* 滚动条 */
::-webkit-scrollbar{width:9px;height:9px}
::-webkit-scrollbar-thumb{background:rgba(99,102,241,.35);border-radius:9px}
::-webkit-scrollbar-track{background:transparent}

@media (max-width:960px){
  .sidebar{display:none}
  .main{margin-left:0;padding:70px 14px 60px}
  .searchbox{min-width:0;width:100%;margin-left:0}
  .bc-head{padding:14px 16px 10px}
  .bc-desc,.bc-score{padding-left:16px;padding-right:16px}
  .codepanel{margin:4px 16px 14px}
  .subq{padding:12px 16px 14px}
}
@media print{
  .topbar,.sidebar,.filterbar,.gotop,.qana-btn{display:none!important}
  .main{margin:0;padding:0}
  body{background:#fff;color:#000}
  .bigcard,.know,.yrhead{break-inside:avoid;border-color:#ccc;background:#fff}
  .codepanel{background:#f6f6f6;max-height:none}
  .codepanel .lc{color:#111}
  .qana{display:block!important}
}

/* ===== 代码精讲面板 ===== */
.walk{margin:2px 22px 16px;border:1px solid rgba(34,211,238,.22);border-radius:12px;background:rgba(34,211,238,.04);overflow:hidden}
.walk-btn{display:flex;align-items:center;gap:9px;width:100%;text-align:left;padding:11px 16px;background:none;border:none;color:var(--cyan2);font-size:13.5px;font-weight:700;cursor:pointer;transition:.15s;font-family:inherit}
.walk-btn:hover{background:rgba(34,211,238,.08)}
.walk-btn .arr{margin-left:auto;font-size:11px;color:var(--ink3);transition:.2s}
.walk.open .walk-btn .arr{transform:rotate(90deg)}
.walk-body{display:none;padding:2px 18px 16px;border-top:1px dashed rgba(103,232,249,.18)}
.walk.open .walk-body{display:block}
.wl-sec-t{font-size:13px;font-weight:800;color:#7dd3fc;margin:14px 0 8px}
.wl-overall{font-size:13.5px;color:#c9d1f2;background:rgba(7,11,29,.5);border-left:3px solid var(--cyan);border-radius:0 9px 9px 0;padding:11px 15px}
.wl-item{display:flex;align-items:flex-start;gap:12px;padding:7px 0;font-size:13.2px;color:#c9d1f2;border-bottom:1px dashed rgba(255,255,255,.05)}
.wl-item:last-child{border-bottom:none}
.wl-ln{flex:none;font-family:Consolas,monospace;font-size:11px;font-weight:700;color:var(--amber);background:rgba(251,191,36,.1);border:1px solid rgba(251,191,36,.3);padding:2px 9px;border-radius:7px;margin-top:2px;white-space:nowrap}
@media (max-width:960px){.walk{margin:2px 16px 14px}}
@media print{
  .walk{break-inside:avoid;border-color:#ccc;background:#fff}
  .walk-btn{display:none}
  .walk-body{display:block}
  .wl-overall{background:#f6f6f6}
}