/* =========================================================
   心桥 · 心血管与多学科学习站
   Visual system v2 — calm clinical teal, warm coral, paper-soft surfaces
   ========================================================= */

/* ---------- Fonts: see fonts.css (subsetted Noto Sans/Serif SC, embedded for file:// use) ---------- */

/* ---------- Tokens ---------- */
:root{
  --bg:#f4f7f8;
  --bg-soft:#eaf0f2;
  --card:#ffffff;
  --card-2:#f9fbfc;
  --card-glass:rgba(255,255,255,.78);
  --ink:#12222b;
  --ink-2:#374953;
  --muted:#5f6f7a;
  --line:#e2eaee;
  --line-2:#cfdbe1;
  --brand:#0f766e;
  --brand-ink:#0a5b55;
  --brand-soft:#e5f4f1;
  --teal:#0f7c93;
  --teal-soft:#e3f2f6;
  --coral:#df5a63;
  --coral-soft:#fdeff0;
  --gold:#ad7620;
  --gold-soft:#fbf2df;
  --violet:#6a59cf;
  --violet-soft:#eeecfb;
  --green:#15845b;
  --green-soft:#e6f5ee;
  --red:#c53b45;
  --red-soft:#fdecee;
  --blue:#27649f;
  --blue-soft:#e8f1fb;
  --shadow:0 1px 2px rgba(16,34,45,.035),0 6px 18px -10px rgba(16,34,45,.12);
  --shadow-md:0 2px 4px rgba(16,34,45,.035),0 16px 34px -20px rgba(16,34,45,.22);
  --shadow-lg:0 4px 10px rgba(16,34,45,.04),0 32px 64px -28px rgba(16,34,45,.32);
  --radius:18px;
  --radius-sm:11px;
  --sidebar:244px;
  --grad-brand:linear-gradient(135deg,#0f766e 0%,#0f7c93 100%);
  --grad-ink:linear-gradient(150deg,#0b4d48 0%,#0f766e 48%,#0d7183 100%);
  --grad-soft:linear-gradient(180deg,var(--card) 0%,var(--card-2) 100%);
  --ring:0 0 0 3px color-mix(in srgb,var(--brand) 14%,transparent);
  --serif:"Noto Serif SC","XQ Rare Serif","Source Han Serif SC","Songti SC","STSong",Georgia,"Times New Roman",serif;
  --sans:"Noto Sans SC","XQ Rare Sans","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:"JetBrains Mono","SFMono-Regular",Consolas,"Liberation Mono",monospace;
}
[data-theme="dark"]{
  --bg:#0a1218;
  --bg-soft:#101b23;
  --card:#121d25;
  --card-2:#16232c;
  --card-glass:rgba(18,29,37,.76);
  --ink:#e9f1f5;
  --ink-2:#bccbd4;
  --muted:#8899a5;
  --line:#21313b;
  --line-2:#2d404b;
  --brand:#48c9b8;
  --brand-ink:#7ee3d5;
  --brand-soft:#122b2a;
  --teal:#58c8dc;
  --teal-soft:#0f2730;
  --coral:#f08089;
  --coral-soft:#301b1e;
  --gold:#e0ac4d;
  --gold-soft:#2c2416;
  --violet:#a698f5;
  --violet-soft:#211e36;
  --green:#52c994;
  --green-soft:#12291f;
  --red:#f28b8b;
  --red-soft:#2f1818;
  --blue:#7fb7f0;
  --blue-soft:#152538;
  --shadow:0 1px 2px rgba(0,0,0,.28),0 10px 28px -16px rgba(0,0,0,.7);
  --shadow-md:0 2px 6px rgba(0,0,0,.32),0 22px 44px -24px rgba(0,0,0,.8);
  --shadow-lg:0 4px 12px rgba(0,0,0,.36),0 38px 80px -30px rgba(0,0,0,.9);
  --grad-soft:linear-gradient(180deg,var(--card) 0%,var(--card-2) 100%);
  color-scheme:dark;
}

/* ---------- Base ---------- */
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:var(--sans);font-size:15px;line-height:1.75;letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
  background-image:
    radial-gradient(1100px 520px at 14% -12%,color-mix(in srgb,var(--brand) 9%,transparent),transparent 62%),
    radial-gradient(900px 460px at 102% -4%,color-mix(in srgb,var(--teal) 8%,transparent),transparent 58%),
    linear-gradient(180deg,#f8fafb 0%,var(--bg) 46%);
  background-attachment:fixed;
}
[data-theme="dark"] body{
  background-image:
    radial-gradient(1000px 520px at 12% -10%,color-mix(in srgb,var(--brand) 13%,transparent),transparent 62%),
    radial-gradient(900px 480px at 104% -6%,color-mix(in srgb,var(--teal) 12%,transparent),transparent 60%),
    linear-gradient(180deg,#0d161d 0%,var(--bg) 50%);
}
::selection{background:color-mix(in srgb,var(--brand) 24%,transparent)}
a{color:var(--brand);text-decoration:none;transition:color .15s}
a:hover{color:var(--brand-ink)}
button{font-family:inherit}
h1,h2,h3,h4{font-family:var(--serif);font-weight:700;line-height:1.35;margin:0;letter-spacing:.015em}
p{margin:0 0 .8em}
img{max-width:100%}
:focus-visible{outline:2px solid color-mix(in srgb,var(--brand) 55%,transparent);outline-offset:2px}
.skip-link{position:absolute;left:-999px;top:8px;background:var(--card);padding:8px 14px;border-radius:8px;z-index:99}
.skip-link:focus{left:8px}

/* thin, quiet scrollbars */
*{scrollbar-width:thin;scrollbar-color:color-mix(in srgb,var(--line-2) 80%,transparent) transparent}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:transparent}
::-webkit-scrollbar-thumb{background:color-mix(in srgb,var(--line-2) 75%,transparent);border:3px solid transparent;background-clip:content-box;border-radius:99px}
::-webkit-scrollbar-thumb:hover{background:var(--muted);border:3px solid transparent;background-clip:content-box}

/* ---------- Layout ---------- */
#app{display:flex;min-height:100vh}
.sidebar{
  width:var(--sidebar);flex:0 0 var(--sidebar);position:fixed;inset:0 auto 0 0;z-index:40;
  display:flex;flex-direction:column;padding:22px 14px 14px;
  background:var(--card-glass);
  backdrop-filter:blur(18px) saturate(150%);-webkit-backdrop-filter:blur(18px) saturate(150%);
  border-right:1px solid color-mix(in srgb,var(--line) 80%,transparent);
}
.sidebar::after{
  content:"";position:absolute;inset:0 0 auto 0;height:180px;pointer-events:none;
  background:radial-gradient(240px 150px at 18% 0%,color-mix(in srgb,var(--brand) 8%,transparent),transparent 70%);
}
.brand{display:flex;align-items:center;gap:12px;padding:2px 8px 24px;position:relative}
.brand-mark{
  width:40px;height:40px;border-radius:13px;background:var(--grad-brand);color:#fff;
  display:grid;place-items:center;position:relative;flex:0 0 40px;
  box-shadow:0 8px 18px -8px color-mix(in srgb,var(--brand) 70%,transparent),inset 0 1px 0 rgba(255,255,255,.28);
  transition:transform .3s cubic-bezier(.2,.8,.3,1.2);
}
.brand:hover .brand-mark{transform:rotate(-4deg) scale(1.04)}
.brand-mark::after{content:"";position:absolute;inset:1px;border-radius:12px;background:linear-gradient(160deg,rgba(255,255,255,.22),transparent 55%)}
.brand-mark svg{width:26px;height:26px;position:relative;z-index:1}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text strong{font-family:var(--serif);font-size:21px;letter-spacing:.12em}
.brand-text span{font-size:9.5px;color:var(--muted);letter-spacing:.2em;text-transform:uppercase;margin-top:4px;font-weight:500}
.nav{display:flex;flex-direction:column;gap:2px;flex:1;position:relative}
.nav-item{
  display:flex;align-items:center;gap:11px;padding:10px 12px;border-radius:11px;
  color:var(--ink-2);font-size:14px;font-weight:500;cursor:pointer;border:0;background:transparent;
  text-align:left;width:100%;position:relative;transition:background .18s,color .18s,transform .18s;
}
.nav-item::before{
  content:"";position:absolute;left:-14px;top:50%;width:3px;height:0;border-radius:0 4px 4px 0;
  background:var(--brand);transform:translateY(-50%);transition:height .22s cubic-bezier(.2,.8,.3,1);
}
.nav-item svg{width:19px;height:19px;flex:0 0 19px;opacity:.72;transition:opacity .18s,transform .18s}
.nav-item:hover{background:color-mix(in srgb,var(--bg-soft) 70%,transparent);color:var(--ink);transform:translateX(2px)}
.nav-item:hover svg{opacity:1}
.nav-item.active{background:color-mix(in srgb,var(--brand-soft) 78%,transparent);color:var(--brand-ink);font-weight:700}
.nav-item.active::before{height:20px}
.nav-item.active svg{opacity:1;color:var(--brand)}
.nav-item .nav-badge{
  margin-left:auto;background:linear-gradient(135deg,var(--coral),#e8776f);color:#fff;font-size:10px;min-width:20px;height:20px;padding:0 6px;
  border-radius:99px;display:grid;place-items:center;font-weight:700;line-height:1;
  box-shadow:0 5px 10px -4px color-mix(in srgb,var(--coral) 60%,transparent);
}
.nav-sep{margin:16px 12px 7px;font-size:10px;letter-spacing:.18em;color:var(--muted);text-transform:uppercase;font-weight:600}
.sidebar-foot{border-top:1px solid var(--line);padding-top:12px;display:flex;flex-direction:column;gap:8px}
.mini-streak{font-size:12px;color:var(--muted);padding:4px 8px;display:flex;align-items:center;gap:7px}
.mini-streak svg{width:16px;height:16px;flex:0 0 16px;color:var(--coral)}
.mini-streak b{color:var(--gold);font-weight:700}
.theme-toggle{
  display:flex;align-items:center;gap:9px;border:1px solid var(--line);background:color-mix(in srgb,var(--card) 60%,transparent);color:var(--muted);
  border-radius:11px;padding:9px 11px;cursor:pointer;font-size:12.5px;transition:.18s;
}
.theme-toggle:hover{color:var(--ink);border-color:var(--line-2);background:var(--card)}
.theme-icon{font-size:15px;line-height:1;transform-origin:center;transition:transform .4s}
.theme-toggle:hover .theme-icon{transform:rotate(180deg)}
.theme-label{font-weight:500}

.main{flex:1;margin-left:var(--sidebar);min-width:0;display:flex;flex-direction:column}
.topbar{
  height:68px;position:sticky;top:0;z-index:30;display:flex;align-items:center;gap:14px;
  padding:0 34px;background:color-mix(in srgb,var(--bg) 74%,transparent);
  backdrop-filter:blur(16px) saturate(140%);-webkit-backdrop-filter:blur(16px) saturate(140%);
  border-bottom:1px solid color-mix(in srgb,var(--line) 55%,transparent);
}
.topbar-brand{display:none;font-family:var(--serif);font-size:17px;font-weight:700;letter-spacing:.12em;line-height:1;white-space:nowrap}
.topbar-brand span{display:block;font-family:var(--sans);font-size:8px;letter-spacing:.16em;color:var(--muted);font-weight:600;margin-top:4px}
.topbar-search{
  flex:1;max-width:480px;display:flex;align-items:center;gap:10px;background:color-mix(in srgb,var(--card) 88%,transparent);
  border:1px solid var(--line);border-radius:12px;padding:9px 13px;color:var(--muted);
  font-size:13.5px;cursor:pointer;transition:border-color .18s,box-shadow .18s,background .18s;
}
.topbar-search:hover{border-color:color-mix(in srgb,var(--brand) 35%,var(--line));box-shadow:0 6px 18px -12px color-mix(in srgb,var(--brand) 60%,transparent);background:var(--card)}
.topbar-search svg{width:17px;height:17px;flex:0 0 17px}
.topbar-search kbd{
  margin-left:auto;font-family:var(--mono);font-size:10.5px;border:1px solid var(--line);border-bottom-width:2px;
  border-radius:6px;padding:1px 6px;background:var(--bg-soft);color:var(--muted);
}
.topbar-right{margin-left:auto;display:flex;align-items:center;gap:5px}
.icon-btn{
  width:38px;height:38px;border-radius:11px;border:1px solid transparent;background:transparent;color:var(--ink-2);
  display:grid;place-items:center;cursor:pointer;transition:.18s;
}
.icon-btn:hover{background:color-mix(in srgb,var(--bg-soft) 80%,transparent);border-color:var(--line);color:var(--ink)}
.icon-btn svg{width:19px;height:19px}
.menu-btn{display:none}
.avatar{
  width:36px;height:36px;border-radius:50%;background:var(--grad-brand);color:#fff;display:grid;place-items:center;
  font-size:13px;font-weight:700;cursor:pointer;margin-left:5px;position:relative;
  box-shadow:0 0 0 2px var(--card),0 0 0 4px color-mix(in srgb,var(--brand) 28%,transparent),0 8px 16px -10px rgba(0,0,0,.5);
  transition:transform .18s;
}
.avatar:hover{transform:scale(1.05)}
.view{padding:14px 34px 84px;max-width:1240px;width:100%;margin:0 auto;outline:0}
.bottom-nav{display:none}
.drawer-backdrop{display:none}

/* ---------- Typography / generic ---------- */
.page-head{display:flex;align-items:flex-end;justify-content:space-between;gap:18px;margin:14px 0 26px;flex-wrap:wrap;position:relative}
.eyebrow{
  display:inline-flex;align-items:center;gap:7px;font-size:10.5px;letter-spacing:.18em;text-transform:uppercase;
  color:var(--brand);font-weight:700;margin-bottom:9px;
}
.eyebrow::before{content:"";width:14px;height:1px;background:currentColor;opacity:.6}
.page-title{font-size:34px;letter-spacing:.02em;line-height:1.25;text-wrap:balance}
.page-sub{color:var(--muted);font-size:13.5px;margin-top:8px;max-width:760px;line-height:1.75}
.section-title{font-size:19.5px;margin:34px 0 14px;display:flex;align-items:center;gap:11px;position:relative}
.section-title::before{
  content:"";width:4px;height:19px;border-radius:99px;background:linear-gradient(180deg,var(--brand),var(--teal));
  flex:0 0 4px;box-shadow:0 0 12px -2px color-mix(in srgb,var(--brand) 50%,transparent);
}
.section-title .count{
  font-family:var(--sans);font-size:11px;color:var(--muted);font-weight:600;background:color-mix(in srgb,var(--bg-soft) 70%,transparent);
  padding:2px 9px;border-radius:99px;border:1px solid color-mix(in srgb,var(--line) 60%,transparent);
}
.muted{color:var(--muted)}
.small{font-size:12.5px}
.tiny{font-size:11.5px}
.center{text-align:center}
.hr{height:1px;background:linear-gradient(90deg,transparent,var(--line),transparent);border:0;margin:24px 0}
.crumb{font-size:11.5px;color:var(--muted);margin:8px 0 12px;display:flex;align-items:center;gap:7px;flex-wrap:wrap}
.crumb span[data-nav]{cursor:pointer;color:var(--muted);transition:color .15s}
.crumb span[data-nav]:hover{color:var(--brand)}
.crumb .sep{opacity:.4}
.crumb b{color:var(--ink-2);font-weight:600}
.cd-arrow{font-size:9px;transition:transform .2s;margin-left:2px}
.chip-details[open]>summary{color:var(--brand-ink);border-color:color-mix(in srgb,var(--brand) 35%,var(--line))}
.chip-details[open]>summary .cd-arrow{transform:rotate(180deg)}

/* ---------- Buttons / chips ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:7px;border-radius:11px;
  border:1px solid var(--line);background:color-mix(in srgb,var(--card) 92%,transparent);color:var(--ink);
  font-size:13.5px;font-weight:600;padding:9px 16px;cursor:pointer;white-space:nowrap;
  transition:transform .12s,background .18s,border-color .18s,box-shadow .18s,color .18s;
  box-shadow:0 1px 0 rgba(255,255,255,.4) inset;
}
[data-theme="dark"] .btn{box-shadow:none}
.btn:hover{border-color:color-mix(in srgb,var(--brand) 26%,var(--line-2));background:var(--card);transform:translateY(-1px);box-shadow:var(--shadow)}
.btn:active{transform:translateY(0) scale(.99)}
.btn svg{width:16px;height:16px;flex:0 0 16px}
.btn-primary{
  background:var(--grad-brand);border-color:transparent;color:#fff;
  box-shadow:0 10px 20px -12px color-mix(in srgb,var(--brand) 80%,transparent),inset 0 1px 0 rgba(255,255,255,.18);
}
.btn-primary:hover{
  background:linear-gradient(135deg,#0b665f,#0d6d82);border-color:transparent;color:#fff;
  box-shadow:0 16px 28px -14px color-mix(in srgb,var(--brand) 80%,transparent),inset 0 1px 0 rgba(255,255,255,.2);
}
.btn-coral{background:linear-gradient(135deg,var(--coral),#e8796f);border-color:transparent;color:#fff}
.btn-coral:hover{filter:brightness(.96);color:#fff}
.btn-soft{background:var(--brand-soft);border-color:transparent;color:var(--brand-ink)}
.btn-soft:hover{background:color-mix(in srgb,var(--brand-soft) 70%,var(--brand) 10%);border-color:transparent;color:var(--brand-ink)}
.btn-ghost{background:transparent;border-color:transparent;color:var(--muted);box-shadow:none}
.btn-ghost:hover{background:color-mix(in srgb,var(--bg-soft) 70%,transparent);color:var(--ink);border-color:transparent;box-shadow:none}
.btn-danger{color:var(--red);border-color:color-mix(in srgb,var(--red) 22%,var(--line))}
.btn-danger:hover{background:var(--red-soft);border-color:color-mix(in srgb,var(--red) 40%,var(--line))}
.btn-sm{padding:6px 12px;font-size:12.5px;border-radius:9px}
.btn-lg{padding:12px 24px;font-size:14.5px;border-radius:13px}
.btn:disabled{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none}
.btn-row{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.chip{
  display:inline-flex;align-items:center;gap:5px;border:1px solid color-mix(in srgb,var(--line) 90%,transparent);background:color-mix(in srgb,var(--card) 88%,transparent);
  color:var(--ink-2);font-size:12px;padding:5px 11px;border-radius:99px;cursor:pointer;
  transition:.18s;white-space:nowrap;font-weight:500;
}
.chip:hover{border-color:color-mix(in srgb,var(--brand) 30%,var(--line));color:var(--ink);background:var(--card);transform:translateY(-1px)}
.chip.active{
  background:linear-gradient(135deg,color-mix(in srgb,var(--brand) 14%,var(--card)),color-mix(in srgb,var(--brand) 8%,var(--card)));
  border-color:color-mix(in srgb,var(--brand) 45%,var(--line));color:var(--brand-ink);font-weight:700;
  box-shadow:0 4px 12px -8px color-mix(in srgb,var(--brand) 65%,transparent);
}
.chip .dot{width:6px;height:6px;border-radius:50%;background:currentColor;opacity:.6}
.chip-row{display:flex;gap:7px;flex-wrap:wrap;align-items:center}
.filter-label{font-size:10px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);font-weight:700;margin-right:2px}
.badge{
  display:inline-flex;align-items:center;gap:4px;font-size:10.5px;font-weight:700;letter-spacing:.03em;
  padding:2px 8px;border-radius:6px;background:var(--bg-soft);color:var(--muted);line-height:1.65;
}
.badge.new{background:var(--coral-soft);color:var(--coral)}
.badge.cn{background:var(--red-soft);color:var(--red)}
.badge.esc{background:var(--blue-soft);color:var(--blue)}
.badge.acc{background:var(--violet-soft);color:var(--violet)}
.badge.gold{background:var(--gold-soft);color:var(--gold)}
.badge.green{background:var(--green-soft);color:var(--green)}

/* ---------- Cards ---------- */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
.card-pad{padding:24px}
.grid{display:grid;gap:14px}
.g2{grid-template-columns:repeat(2,minmax(0,1fr))}
.g3{grid-template-columns:repeat(3,minmax(0,1fr))}
.g4{grid-template-columns:repeat(4,minmax(0,1fr))}

/* ---------- Home hero ---------- */
.hero{
  position:relative;overflow:hidden;border-radius:24px;padding:34px 36px 38px;color:#fff;
  background:var(--grad-ink);
  box-shadow:0 30px 60px -34px rgba(6,62,58,.85),inset 0 1px 0 rgba(255,255,255,.12);
  isolation:isolate;
}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;z-index:0;
  background:
    radial-gradient(520px 300px at 82% 8%,rgba(88,214,199,.24),transparent 66%),
    radial-gradient(420px 260px at 12% 110%,rgba(8,48,58,.6),transparent 70%),
    linear-gradient(120deg,rgba(255,255,255,.06),transparent 42%);
}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;z-index:0;opacity:.5;
  background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
  background-size:56px 56px;
  mask-image:radial-gradient(ellipse 80% 100% at 70% 30%,#000 20%,transparent 76%);
  -webkit-mask-image:radial-gradient(ellipse 80% 100% at 70% 30%,#000 20%,transparent 76%);
}
.hero-deco{position:absolute;inset:0;z-index:0;pointer-events:none;overflow:hidden}
.hero-ecg{
  position:absolute;left:0;right:0;bottom:-2px;width:100%;height:76px;opacity:.24;
  color:#fff;
}
.hero-ecg path{
  stroke:currentColor;stroke-width:1.4;fill:none;
  stroke-dasharray:1400;stroke-dashoffset:1400;
  animation:ecgDraw 2.6s cubic-bezier(.35,0,.2,1) .2s forwards;
}
@keyframes ecgDraw{to{stroke-dashoffset:0}}
.hero-inner{position:relative;z-index:2;display:flex;align-items:center;justify-content:space-between;gap:30px;flex-wrap:wrap}
.hero .eyebrow{color:rgba(255,255,255,.68);font-size:10.5px}
.hero .eyebrow::before{background:rgba(255,255,255,.5)}
.hero h1{font-size:34px;line-height:1.32;letter-spacing:.025em;margin-bottom:10px;text-shadow:0 2px 18px rgba(0,0,0,.16)}
.hero h1 em{font-style:normal;color:#a9ece3}
.hero p{color:rgba(255,255,255,.8);font-size:13.5px;margin:0;max-width:540px;line-height:1.8}
.hero p b{color:#fff}
.hero-actions{display:flex;gap:10px;margin-top:22px;flex-wrap:wrap}
.hero .btn-primary{
  background:#fff;color:#0a5b55;border-color:#fff;box-shadow:0 14px 30px -18px rgba(0,0,0,.6);
}
.hero .btn-primary:hover{background:#effcfa;color:#0a5b55;transform:translateY(-2px)}
.hero .btn-ghost{color:#fff;border-color:rgba(255,255,255,.28);background:rgba(255,255,255,.07);box-shadow:none}
.hero .btn-ghost:hover{background:rgba(255,255,255,.15);color:#fff;border-color:rgba(255,255,255,.42)}
.hero-ring{
  display:flex;align-items:center;gap:17px;padding:16px 20px;border-radius:18px;
  background:linear-gradient(150deg,rgba(255,255,255,.16),rgba(255,255,255,.06));
  border:1px solid rgba(255,255,255,.2);
  backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.18),0 18px 40px -26px rgba(0,0,0,.6);
}
.hero-ring .ring-label{font-size:11.5px;color:rgba(255,255,255,.72);line-height:1.5}
.hero-ring .ring-label b{display:block;color:#fff;font-size:19px;font-family:var(--serif);margin-bottom:2px;letter-spacing:.03em}
.ring{position:relative;display:grid;place-items:center}
.ring svg{transform:rotate(-90deg)}
.ring .ring-text{position:absolute;text-align:center;line-height:1.1}
.ring .ring-text b{font-size:20px;font-family:var(--serif)}
.ring .ring-text span{font-size:9px;color:var(--muted);display:block}

/* ---------- Stats ---------- */
.stat-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:13px;margin-top:18px}
.stat{
  position:relative;overflow:hidden;background:var(--card);border:1px solid var(--line);border-radius:16px;
  padding:17px 18px;box-shadow:var(--shadow);transition:transform .18s,box-shadow .18s,border-color .18s;
}
.stat::after{
  content:"";position:absolute;right:-40px;top:-60px;width:130px;height:130px;border-radius:50%;pointer-events:none;
  background:radial-gradient(circle,color-mix(in srgb,var(--brand) 7%,transparent),transparent 70%);
}
.stat:hover{transform:translateY(-2px);box-shadow:var(--shadow-md);border-color:var(--line-2)}
.stat .stat-label{font-size:11.5px;color:var(--muted);display:flex;align-items:center;gap:6px;font-weight:500;letter-spacing:.02em}
.stat .stat-value{font-family:var(--serif);font-size:30px;line-height:1.2;margin-top:5px;letter-spacing:.02em}
.stat .stat-value small{font-size:12px;font-family:var(--sans);color:var(--muted);font-weight:400;margin-left:2px}
.stat .stat-sub{font-size:11px;color:var(--muted);margin-top:3px}
.stat .stat-icon{
  width:34px;height:34px;border-radius:10px;display:grid;place-items:center;margin-bottom:10px;
  border:1px solid color-mix(in srgb,currentColor 14%,transparent);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.25);
}
.stat .stat-icon svg{width:17px;height:17px}

.home-cols{display:grid;grid-template-columns:minmax(0,1.55fr) minmax(0,1fr);gap:20px;margin-top:24px;align-items:start}

/* ---------- Module cards ---------- */
.module-card{
  position:relative;overflow:hidden;background:var(--card);border:1px solid var(--line);border-radius:16px;padding:17px;
  cursor:pointer;transition:transform .18s,box-shadow .18s,border-color .18s;display:flex;flex-direction:column;gap:10px;
}
.module-card::before{
  content:"";position:absolute;left:0;top:0;right:0;height:2px;border-radius:2px;
  background:var(--mc,var(--brand));opacity:0;transform:scaleX(.32);transform-origin:left;
  transition:opacity .22s,transform .28s cubic-bezier(.2,.8,.3,1);
}
.module-card::after{
  content:"";position:absolute;right:-30px;top:-40px;width:120px;height:120px;border-radius:50%;pointer-events:none;
  background:radial-gradient(circle,color-mix(in srgb,var(--mc,var(--brand)) 9%,transparent),transparent 70%);
}
.module-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:color-mix(in srgb,var(--mc,var(--brand)) 28%,var(--line-2))}
.module-card:hover::before{opacity:1;transform:scaleX(1)}
.module-card .mc-top{display:flex;align-items:center;gap:10px;position:relative;z-index:1}
.module-card .mc-icon{
  width:38px;height:38px;border-radius:11px;display:grid;place-items:center;font-size:19px;flex:0 0 38px;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.3);transition:transform .2s;
}
.module-card:hover .mc-icon{transform:scale(1.05) rotate(-2deg)}
.module-card .mc-title{font-weight:700;font-size:14.5px;font-family:var(--serif);line-height:1.35;letter-spacing:.02em}
.module-card .mc-sub{font-size:11px;color:var(--muted);margin-top:1px}
.module-card .mc-desc{font-size:12.3px;color:var(--muted);line-height:1.65;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;min-height:40px;position:relative;z-index:1}
.progress-line{height:6px;background:var(--bg-soft);border-radius:99px;overflow:hidden;box-shadow:inset 0 1px 2px rgba(16,34,45,.05)}
.progress-line>span{display:block;height:100%;border-radius:99px;background:linear-gradient(90deg,var(--brand),var(--teal));transition:width .55s cubic-bezier(.2,.8,.3,1)}
.mc-foot{display:flex;align-items:center;justify-content:space-between;font-size:10.5px;color:var(--muted);position:relative;z-index:1}

/* ---------- Panels ---------- */
.panel{background:var(--card);border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);overflow:hidden}
.panel-head{
  display:flex;align-items:center;justify-content:space-between;padding:16px 20px;border-bottom:1px solid var(--line);
  background:linear-gradient(180deg,color-mix(in srgb,var(--bg-soft) 35%,transparent),transparent);
}
.panel-head h3{font-size:15.5px;letter-spacing:.03em}
.panel-body{padding:16px 20px}
.due-item{display:flex;align-items:center;gap:12px;padding:11px 0;border-bottom:1px dashed var(--line)}
.due-item:last-child{border-bottom:0}
.due-item .di-icon{
  width:32px;height:32px;border-radius:9px;display:grid;place-items:center;background:var(--brand-soft);color:var(--brand);flex:0 0 32px;
  transition:transform .18s;
}
.due-item:hover .di-icon{transform:scale(1.08)}
.due-item .di-icon svg{width:16px;height:16px}
.due-item .di-main{flex:1;min-width:0}
.due-item .di-main b{display:block;font-size:12.8px;font-weight:600}
.due-item .di-main span{font-size:11px;color:var(--muted)}
.due-item .di-num{font-family:var(--serif);font-size:18px}

.guide-mini{display:block;padding:12px 0;border-bottom:1px dashed var(--line);cursor:pointer;transition:.15s}
.guide-mini:last-child{border-bottom:0}
.guide-mini:hover{padding-left:4px}
.guide-mini:hover .gm-title{color:var(--brand)}
.gm-top{display:flex;gap:6px;align-items:center;margin-bottom:4px}
.gm-title{font-size:12.8px;font-weight:600;line-height:1.5;transition:color .15s}
.gm-meta{font-size:10.5px;color:var(--muted)}

/* ---------- Learn ---------- */
.mod-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
.learn-toolbar{
  display:flex;gap:12px;flex-wrap:wrap;align-items:center;justify-content:space-between;margin-bottom:18px;
  background:color-mix(in srgb,var(--card) 86%,transparent);border:1px solid var(--line);border-radius:16px;
  padding:12px 14px;box-shadow:var(--shadow);
}
.topic-row{margin-bottom:0}
.chip-details{display:inline-flex;flex-wrap:wrap;gap:7px;align-items:center}
.chip-details>summary{list-style:none}
.chip-details>summary::-webkit-details-marker{display:none}
.chip-details[open]{flex-basis:100%}
.chip-details[open] .chip-more-panel{display:flex;gap:7px;flex-wrap:wrap;margin-top:8px;width:100%}
.chip-more-panel{display:none}
.mod-hero{
  display:flex;gap:20px;align-items:flex-start;padding:26px;border-radius:20px;border:1px solid var(--line);
  background:linear-gradient(150deg,var(--card) 0%,var(--card-2) 100%);box-shadow:var(--shadow-md);margin-bottom:18px;
  position:relative;overflow:hidden;
}
.mod-hero::before{
  content:"";position:absolute;right:-70px;top:-90px;width:240px;height:240px;border-radius:50%;pointer-events:none;
  background:radial-gradient(circle,color-mix(in srgb,var(--brand) 9%,transparent),transparent 70%);
}
.mod-hero .mh-icon{
  width:56px;height:56px;border-radius:16px;display:grid;place-items:center;font-size:28px;flex:0 0 56px;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.3),var(--shadow);
}
.mod-hero h1{font-size:28px;margin-bottom:5px;letter-spacing:.02em;position:relative}
.mod-hero .mh-desc{color:var(--muted);font-size:13.2px;max-width:680px;line-height:1.7}
.mh-meta{display:flex;gap:16px;flex-wrap:wrap;font-size:11.5px;color:var(--muted);margin-top:11px}
.mh-meta b{color:var(--ink-2);font-weight:700}
.mh-side{margin-left:auto;text-align:right;flex:0 0 auto}
.tabs{display:flex;gap:6px;border-bottom:1px solid var(--line);margin:8px 0 22px;overflow-x:auto;padding-bottom:0}
.tab{
  border:0;background:transparent;padding:10px 15px;font-size:13px;color:var(--muted);cursor:pointer;
  border-bottom:2px solid transparent;font-weight:600;white-space:nowrap;transition:.18s;position:relative;
}
.tab:hover{color:var(--ink);background:color-mix(in srgb,var(--bg-soft) 40%,transparent);border-radius:8px 8px 0 0}
.tab.active{color:var(--brand);border-bottom-color:var(--brand)}
.note{max-width:880px}
.note-section{padding:22px 0 8px;border-bottom:1px solid var(--line)}
.note-section:last-child{border-bottom:0}
.note-section h3{font-size:18.5px;margin-bottom:12px;display:flex;align-items:center;gap:10px;letter-spacing:.02em}
.note-section h3 .sec-check svg{width:12px;height:12px;flex:0 0 12px}
.note-section h3 .sec-check{
  margin-left:auto;border:1px solid var(--line);background:var(--card);border-radius:8px;font-size:10.5px;color:var(--muted);
  padding:4px 10px;cursor:pointer;display:inline-flex;gap:5px;align-items:center;font-family:var(--sans);font-weight:600;
  transition:.18s;white-space:nowrap;
}
.note-section h3 .sec-check:hover{border-color:var(--brand);color:var(--brand)}
.note-section h3 .sec-check.done{background:var(--green-soft);color:var(--green);border-color:transparent}
.note h3{font-family:var(--serif)}
.note h4{font-family:var(--sans);font-size:14px;margin:18px 0 7px;color:var(--ink);letter-spacing:.02em}
.note h4::before{content:"▪";color:var(--brand);margin-right:7px;font-size:11px;vertical-align:1px}
.note ul,.note ol{margin:6px 0 13px;padding-left:23px}
.note li{margin:4px 0}
.note li::marker{color:color-mix(in srgb,var(--brand) 65%,var(--muted))}
.note p{margin:7px 0 11px}
.note strong{color:var(--ink);font-weight:700}
.note em{color:var(--coral);font-style:normal;font-weight:600}
.note code{font-family:var(--mono);background:var(--bg-soft);padding:1px 6px;border-radius:5px;font-size:12px;border:1px solid color-mix(in srgb,var(--line) 60%,transparent)}
.table-wrap{overflow-x:auto;margin:12px 0 18px;border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow)}
.note table{border-collapse:collapse;width:100%;font-size:12.6px;line-height:1.6;background:var(--card)}
.note th{background:linear-gradient(180deg,var(--bg-soft),color-mix(in srgb,var(--bg-soft) 60%,var(--card)));text-align:left;font-weight:700;padding:9px 12px;border-bottom:1px solid var(--line);white-space:nowrap}
.note td{padding:8px 12px;border-bottom:1px solid var(--line);vertical-align:top}
.note tr:last-child td{border-bottom:0}
.note tbody tr:hover{background:color-mix(in srgb,var(--brand-soft) 30%,transparent)}
.callout{
  border-radius:12px;padding:13px 16px;margin:14px 0;font-size:13px;line-height:1.7;
  border-left:3px solid var(--brand);background:linear-gradient(100deg,var(--brand-soft),color-mix(in srgb,var(--brand-soft) 45%,var(--card)));
  color:var(--ink-2);
}
.callout b{color:var(--ink)}
.callout.warn{border-left-color:var(--coral);background:linear-gradient(100deg,var(--coral-soft),color-mix(in srgb,var(--coral-soft) 45%,var(--card)))}
.callout.tip{border-left-color:var(--gold);background:linear-gradient(100deg,var(--gold-soft),color-mix(in srgb,var(--gold-soft) 45%,var(--card)))}
.callout.exam{border-left-color:var(--violet);background:linear-gradient(100deg,var(--violet-soft),color-mix(in srgb,var(--violet-soft) 45%,var(--card)))}
.callout .co-title{display:block;font-weight:700;color:var(--ink);margin-bottom:3px;font-size:12.5px;letter-spacing:.04em}
.note-source{font-size:11px;color:var(--muted);margin-top:16px;padding-top:11px;border-top:1px dashed var(--line)}
.keypoint-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:12px 0}
.keypoint{
  position:relative;background:linear-gradient(160deg,var(--card-2),color-mix(in srgb,var(--brand-soft) 25%,var(--card)));
  border:1px solid var(--line);border-radius:12px;padding:12px 14px;font-size:12.8px;line-height:1.65;
  transition:transform .18s,box-shadow .18s;
}
.keypoint:hover{transform:translateY(-1px);box-shadow:var(--shadow)}
.keypoint b{display:block;color:var(--brand-ink);font-size:11.5px;margin-bottom:3px;letter-spacing:.05em;font-weight:700}

/* ---------- Flash cards ---------- */
.deck-bar{display:flex;gap:10px;flex-wrap:wrap;align-items:center;margin-bottom:18px}
.flash-stage{max-width:760px;margin:0 auto}
.flash-meta{display:flex;justify-content:space-between;align-items:center;font-size:11.5px;color:var(--muted);margin-bottom:10px;letter-spacing:.02em}
.flash-progress{height:5px;background:var(--bg-soft);border-radius:99px;overflow:hidden;margin-bottom:22px}
.flash-progress>span{display:block;height:100%;background:linear-gradient(90deg,var(--brand),var(--teal));border-radius:99px;transition:width .35s;box-shadow:0 0 10px color-mix(in srgb,var(--brand) 45%,transparent)}
.flashcard{perspective:1600px;min-height:340px;position:relative;cursor:pointer;user-select:none}
.flash-inner{position:relative;width:100%;min-height:340px;transform-style:preserve-3d;transition:transform .55s cubic-bezier(.2,.8,.25,1)}
.flashcard.flipped .flash-inner{transform:rotateY(180deg)}
.flash-face{
  position:absolute;inset:0;backface-visibility:hidden;-webkit-backface-visibility:hidden;
  background:linear-gradient(160deg,var(--card) 0%,var(--card-2) 100%);
  border:1px solid var(--line);border-radius:22px;box-shadow:var(--shadow-lg);padding:32px 34px;
  display:flex;flex-direction:column;justify-content:center;overflow:auto;
}
.flash-face::after{
  content:"";position:absolute;inset:0;border-radius:22px;pointer-events:none;
  background:radial-gradient(320px 180px at 100% 0%,color-mix(in srgb,var(--brand) 7%,transparent),transparent 70%);
}
.flash-face.back{transform:rotateY(180deg);background:linear-gradient(165deg,color-mix(in srgb,var(--brand-soft) 32%,var(--card)),var(--card-2))}
.flash-tag{
  align-self:flex-start;font-size:10px;letter-spacing:.08em;color:var(--brand);background:var(--brand-soft);
  padding:3px 9px;border-radius:99px;font-weight:700;margin-bottom:15px;position:relative;z-index:1;
}
.flash-q{font-family:var(--serif);font-size:23px;line-height:1.65;letter-spacing:.015em;position:relative;z-index:1}
.flash-hint{color:var(--muted);font-size:12px;margin-top:15px;padding-top:12px;border-top:1px dashed var(--line);position:relative;z-index:1}
.flash-a{font-size:15.5px;line-height:1.85;color:var(--ink-2);position:relative;z-index:1}
.flash-a b{color:var(--ink)}
.flash-a ul{padding-left:20px;margin:6px 0}
.flash-a table{width:100%;border-collapse:collapse;font-size:12.8px;margin-top:8px}
.flash-a td,.flash-a th{border-bottom:1px solid var(--line);padding:6px 8px;text-align:left}
.flash-flip-hint{position:absolute;right:22px;bottom:15px;font-size:10.5px;color:var(--muted);letter-spacing:.04em}
.rate-row{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-top:20px}
.rate-btn{
  position:relative;border:1px solid var(--line);background:var(--card);border-radius:13px;padding:12px 8px;cursor:pointer;
  text-align:center;transition:.18s;color:var(--ink);overflow:hidden;
}
.rate-btn::before{content:"";position:absolute;left:0;right:0;top:0;height:2px;background:var(--rate,var(--brand));opacity:.55}
.rate-btn b{display:block;font-size:13.5px;margin-bottom:1px}
.rate-btn span{font-size:10.5px;color:var(--muted)}
.rate-btn:hover{transform:translateY(-2px);border-color:color-mix(in srgb,var(--rate,var(--brand)) 45%,var(--line));box-shadow:var(--shadow)}
.rate-btn[data-grade="0"]{--rate:var(--red)}
.rate-btn[data-grade="1"]{--rate:var(--gold)}
.rate-btn[data-grade="2"]{--rate:var(--brand)}
.rate-btn[data-grade="3"]{--rate:var(--green)}
.rate-btn[data-grade="0"]:hover{background:var(--red-soft)}
.rate-btn[data-grade="1"]:hover{background:var(--gold-soft)}
.rate-btn[data-grade="2"]:hover{background:var(--brand-soft)}
.rate-btn[data-grade="3"]:hover{background:var(--green-soft)}
.session-summary{max-width:660px;margin:34px auto;text-align:center}
.big-ring-wrap{display:flex;justify-content:center;margin:12px 0 20px}

/* ---------- Quiz ---------- */
.q-wrap{max-width:840px;margin:0 auto}
.q-top{display:flex;justify-content:space-between;align-items:center;font-size:11.5px;color:var(--muted);margin-bottom:12px}
.q-card{background:var(--card);border:1px solid var(--line);border-radius:20px;padding:28px 30px;box-shadow:var(--shadow-md);position:relative}
.q-stem{font-size:16.5px;line-height:1.8;font-family:var(--serif);margin-bottom:20px}
.q-stem .case-label{
  display:inline-block;font-family:var(--sans);font-size:10px;background:var(--violet-soft);color:var(--violet);
  padding:2px 8px;border-radius:5px;font-weight:700;margin-right:7px;vertical-align:2px;letter-spacing:.06em;
}
.options{display:flex;flex-direction:column;gap:9px}
.option{
  display:flex;align-items:flex-start;gap:12px;border:1px solid var(--line);background:var(--card);
  border-radius:12px;padding:12px 15px;cursor:pointer;font-size:13.8px;line-height:1.65;transition:.16s;
}
.option:hover{border-color:color-mix(in srgb,var(--brand) 30%,var(--line-2));background:var(--card-2);transform:translateX(2px)}
.option .opt-key{
  width:24px;height:24px;flex:0 0 24px;border-radius:7px;background:var(--bg-soft);display:grid;place-items:center;
  font-size:11px;font-weight:700;color:var(--muted);margin-top:1px;transition:.16s;
}
.option.selected{border-color:var(--brand);background:var(--brand-soft);box-shadow:0 0 0 1px color-mix(in srgb,var(--brand) 30%,transparent)}
.option.selected .opt-key{background:var(--brand);color:#fff}
.option.correct{border-color:var(--green);background:var(--green-soft)}
.option.correct .opt-key{background:var(--green);color:#fff}
.option.wrong{border-color:var(--red);background:var(--red-soft)}
.option.wrong .opt-key{background:var(--red);color:#fff}
.option.dim{opacity:.5}
.q-actions{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-top:22px;flex-wrap:wrap}
.explain{
  border-radius:13px;background:linear-gradient(150deg,var(--card-2),color-mix(in srgb,var(--brand-soft) 22%,var(--card)));
  border:1px solid var(--line);padding:16px 18px;margin-top:18px;font-size:13.2px;line-height:1.8;
}
.explain .ex-head{display:flex;align-items:center;gap:8px;font-weight:700;margin-bottom:6px;font-size:12.8px;flex-wrap:wrap}
.explain .ex-head svg{width:18px;height:18px;flex:0 0 18px}
.explain .ex-head.ok{color:var(--green)}
.explain .ex-head.no{color:var(--red)}
.explain .ex-src{font-size:11px;color:var(--muted);margin-top:8px;padding-top:8px;border-top:1px dashed var(--line)}
.q-bookmark{
  border:1px solid transparent;background:transparent;color:var(--muted);cursor:pointer;font-size:11.5px;
  display:flex;align-items:center;gap:5px;padding:5px 9px;border-radius:8px;transition:.15s;
}
.q-bookmark:hover{background:var(--bg-soft);border-color:var(--line)}
.q-bookmark.on{color:var(--gold);background:var(--gold-soft)}
.q-bookmark svg{width:14px;height:14px}
.exam-palette{display:flex;gap:6px;flex-wrap:wrap;margin-top:16px}
.pal-dot{width:31px;height:31px;border-radius:8px;border:1px solid var(--line);background:var(--card);font-size:11px;cursor:pointer;color:var(--muted);transition:.15s}
.pal-dot:hover{border-color:var(--line-2)}
.pal-dot.done{background:var(--brand-soft);border-color:color-mix(in srgb,var(--brand) 40%,var(--line));color:var(--brand-ink)}
.pal-dot.current{outline:2px solid var(--brand);outline-offset:1px}
.timer{font-family:var(--mono);font-size:12.5px;background:var(--card);border:1px solid var(--line);padding:5px 11px;border-radius:9px;letter-spacing:.02em}
.timer.low{color:var(--coral);border-color:color-mix(in srgb,var(--coral) 45%,var(--line));background:var(--coral-soft)}

/* ---------- Guidelines ---------- */
.guide-list{display:flex;flex-direction:column;gap:12px}
.guide-card{
  position:relative;overflow:hidden;background:var(--card);border:1px solid var(--line);border-radius:16px;padding:19px 22px;
  box-shadow:var(--shadow);cursor:pointer;transition:transform .18s,box-shadow .18s,border-color .18s;
}
.guide-card::before{
  content:"";position:absolute;left:0;top:14px;bottom:14px;width:3px;border-radius:0 3px 3px 0;
  background:linear-gradient(180deg,var(--gc,var(--brand)),color-mix(in srgb,var(--gc,var(--brand)) 55%,var(--teal)));
  opacity:.55;transition:top .2s,bottom .2s,opacity .2s;
}
.guide-card:hover{border-color:var(--line-2);box-shadow:var(--shadow-md);transform:translateY(-2px)}
.guide-card:hover::before{top:0;bottom:0;opacity:1}
.gc-top{display:flex;gap:7px;align-items:center;flex-wrap:wrap;margin-bottom:8px}
.gc-title{font-family:var(--serif);font-size:16.5px;line-height:1.5;font-weight:700;margin-bottom:4px;letter-spacing:.01em}
.gc-meta{font-size:11px;color:var(--muted);display:flex;gap:10px;flex-wrap:wrap}
.gc-points{margin:11px 0 0;padding-left:20px;font-size:12.5px;color:var(--ink-2);line-height:1.75}
.gc-points li{margin:3px 0}
.gc-points li::marker{color:color-mix(in srgb,var(--brand) 70%,var(--muted))}
.year-head{display:flex;align-items:center;gap:11px;margin:30px 0 12px}
.year-head h3{font-size:24px;color:var(--ink);letter-spacing:.04em}
.year-head .ln{flex:1;height:1px;background:linear-gradient(90deg,var(--line),transparent)}
.gd-detail .gd-key{display:flex;align-items:center;gap:8px;margin:2px 0 10px}

/* ---------- Me / stats ---------- */
.profile-card{
  position:relative;overflow:hidden;display:flex;align-items:center;gap:20px;padding:26px;border-radius:20px;
  background:linear-gradient(135deg,color-mix(in srgb,var(--brand-soft) 65%,var(--card)),var(--card) 62%);
  border:1px solid var(--line);box-shadow:var(--shadow-md);
}
.profile-card::after{
  content:"";position:absolute;right:-50px;top:-80px;width:240px;height:240px;border-radius:50%;
  border:1px solid color-mix(in srgb,var(--brand) 14%,transparent);pointer-events:none;
}
.big-avatar{
  width:66px;height:66px;border-radius:50%;background:var(--grad-brand);color:#fff;display:grid;place-items:center;
  font-size:24px;font-weight:700;font-family:var(--serif);flex:0 0 66px;position:relative;
  box-shadow:0 0 0 4px var(--card),0 0 0 6px color-mix(in srgb,var(--brand) 22%,transparent),0 14px 28px -16px rgba(0,0,0,.5);
}
.xp-bar{height:8px;background:color-mix(in srgb,var(--bg-soft) 80%,var(--card));border-radius:99px;overflow:hidden;margin-top:9px;max-width:440px;box-shadow:inset 0 1px 2px rgba(16,34,45,.06)}
.xp-bar>span{display:block;height:100%;background:linear-gradient(90deg,var(--gold),var(--coral));border-radius:99px;transition:width .6s;box-shadow:0 0 10px color-mix(in srgb,var(--gold) 40%,transparent)}
.heatmap{display:flex;gap:5px;overflow-x:auto;padding:6px 0 2px}
.hm-week{display:flex;flex-direction:column;gap:5px}
.hm-cell{width:14px;height:14px;border-radius:4px;background:var(--bg-soft);position:relative;transition:transform .15s}
.hm-cell:hover{transform:scale(1.18)}
.hm-cell[data-l="1"]{background:color-mix(in srgb,var(--brand) 26%,var(--bg-soft))}
.hm-cell[data-l="2"]{background:color-mix(in srgb,var(--brand) 48%,var(--bg-soft))}
.hm-cell[data-l="3"]{background:color-mix(in srgb,var(--brand) 72%,var(--bg-soft))}
.hm-cell[data-l="4"]{background:var(--brand);box-shadow:0 0 8px -1px color-mix(in srgb,var(--brand) 45%,transparent)}
.hm-legend{display:flex;align-items:center;gap:5px;font-size:10px;color:var(--muted);margin-top:10px}
.hm-legend .hm-cell{width:11px;height:11px}
.badge-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}
.ach{
  text-align:center;padding:16px 8px;border:1px solid var(--line);border-radius:14px;background:var(--card);
  transition:transform .18s,box-shadow .18s;position:relative;overflow:hidden;
}
.ach:hover{transform:translateY(-2px);box-shadow:var(--shadow)}
.ach .ach-icon{font-size:25px;filter:grayscale(1);opacity:.35;transition:.2s}
.ach.earned .ach-icon{filter:none;opacity:1}
.ach .ach-name{font-size:11.5px;font-weight:700;margin-top:6px}
.ach .ach-desc{font-size:9.5px;color:var(--muted);margin-top:2px;line-height:1.5}
.ach.earned{
  border-color:color-mix(in srgb,var(--gold) 38%,var(--line));
  background:linear-gradient(170deg,var(--gold-soft),var(--card) 70%);
}
.ach.earned::after{
  content:"";position:absolute;right:-26px;top:-30px;width:70px;height:70px;border-radius:50%;
  background:radial-gradient(circle,color-mix(in srgb,var(--gold) 18%,transparent),transparent 70%);
}

/* ---------- Search ---------- */
.search-box{
  display:flex;align-items:center;gap:11px;background:var(--card);border:1px solid var(--line);
  border-radius:14px;padding:13px 17px;box-shadow:var(--shadow-md);transition:border-color .18s,box-shadow .18s;
}
.search-box:focus-within{border-color:color-mix(in srgb,var(--brand) 45%,var(--line));box-shadow:var(--ring),var(--shadow)}
.search-box svg{width:20px;height:20px;color:var(--muted);flex:0 0 20px}
.search-box input{border:0;background:transparent;outline:0;font-size:15px;color:var(--ink);width:100%;font-family:inherit}
.search-box input::placeholder{color:var(--muted)}
.search-results{margin-top:20px;display:flex;flex-direction:column;gap:8px}
.sr-item{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:13px 16px;cursor:pointer;transition:.16s}
.sr-item:hover{border-color:var(--line-2);transform:translateX(2px);box-shadow:var(--shadow)}
.sr-type{font-size:9.5px;font-weight:700;letter-spacing:.08em;color:var(--brand);text-transform:uppercase}
.sr-title{font-size:13.2px;font-weight:600;margin:3px 0;line-height:1.55}
.sr-snip{font-size:11.5px;color:var(--muted);line-height:1.65;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
mark{background:color-mix(in srgb,var(--gold) 32%,transparent);color:inherit;border-radius:3px;padding:0 2px}

/* ---------- Modal / toast ---------- */
.modal-backdrop{
  position:fixed;inset:0;background:rgba(7,16,22,.55);backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);
  z-index:80;display:flex;align-items:center;justify-content:center;padding:20px;animation:fadeIn .2s;
}
.modal{
  background:var(--card);border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow-lg);
  width:min(700px,100%);max-height:86vh;overflow:auto;animation:popIn .26s cubic-bezier(.2,.9,.3,1.15);
}
.modal-head{
  display:flex;align-items:flex-start;gap:12px;padding:22px 24px 14px;border-bottom:1px solid var(--line);
  position:sticky;top:0;background:linear-gradient(180deg,var(--card) 70%,color-mix(in srgb,var(--card) 88%,transparent));z-index:2;
  backdrop-filter:blur(8px);
}
.modal-head h2{font-size:20px;line-height:1.4;flex:1}
.modal-body{padding:20px 24px 24px}
.modal-close{
  border:1px solid var(--line);background:var(--bg-soft);color:var(--muted);width:32px;height:32px;border-radius:9px;
  cursor:pointer;font-size:17px;line-height:1;transition:.16s;
}
.modal-close:hover{color:var(--ink);background:var(--card);border-color:var(--line-2)}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}
@keyframes popIn{from{opacity:0;transform:scale(.97) translateY(8px)}to{opacity:1;transform:none}}
.toast{
  position:fixed;left:50%;bottom:28px;transform:translate(-50%,20px);background:color-mix(in srgb,var(--ink) 94%,transparent);color:var(--bg);
  padding:10px 18px;border-radius:12px;font-size:12.5px;opacity:0;pointer-events:none;transition:.28s;z-index:100;
  box-shadow:var(--shadow-lg);max-width:90vw;text-align:center;backdrop-filter:blur(8px);font-weight:500;
}
.toast.show{opacity:1;transform:translate(-50%,0)}

/* ---------- Empty state ---------- */
.empty{text-align:center;padding:60px 20px;color:var(--muted)}
.empty .empty-icon{
  font-size:34px;margin:0 auto 14px;opacity:.9;width:68px;height:68px;border-radius:20px;display:grid;place-items:center;
  background:linear-gradient(150deg,var(--bg-soft),color-mix(in srgb,var(--brand-soft) 45%,var(--card)));
  border:1px solid var(--line);box-shadow:var(--shadow);
}
.empty h3{color:var(--ink);font-size:17px;margin-bottom:5px}
.empty p{font-size:12.5px;max-width:420px;margin:0 auto 15px;line-height:1.7}

/* ---------- Footer ---------- */
.site-foot{
  margin-top:44px;padding-top:18px;border-top:1px solid var(--line);font-size:10.5px;color:var(--muted);line-height:1.85;
}
.site-foot b{color:var(--ink-2)}

/* ---------- Responsive ---------- */
@media (max-width:1080px){
  .stat-grid{grid-template-columns:repeat(2,1fr)}
  .mod-grid{grid-template-columns:repeat(2,1fr)}
  .g4{grid-template-columns:repeat(2,1fr)}
  .home-cols{grid-template-columns:1fr}
}
@media (max-width:900px){
  :root{--sidebar:0px}
  .sidebar{transform:translateX(-100%);transition:transform .28s cubic-bezier(.2,.8,.3,1);width:262px;flex-basis:262px;box-shadow:none;border-right:0;z-index:60}
  .sidebar.open{transform:none;box-shadow:var(--shadow-lg)}
  .sidebar.open ~ .drawer-backdrop{
    display:block;position:fixed;inset:0;z-index:55;background:rgba(7,16,22,.4);
    backdrop-filter:blur(3px);-webkit-backdrop-filter:blur(3px);animation:fadeIn .2s;
  }
  .sidebar.open ~ .bottom-nav{display:none}
  .main{margin-left:0}
  .view{padding:10px 20px 104px}
  .topbar{padding:0 20px;height:62px}
  .menu-btn{display:grid}
  .topbar-brand{display:block;margin-right:auto}
  .topbar-search{display:none}
  .bottom-nav{
    display:flex;position:fixed;bottom:calc(9px + env(safe-area-inset-bottom));left:10px;right:10px;z-index:50;
    background:color-mix(in srgb,var(--card) 86%,transparent);
    backdrop-filter:blur(18px) saturate(160%);-webkit-backdrop-filter:blur(18px) saturate(160%);
    border:1px solid color-mix(in srgb,var(--line) 85%,transparent);border-radius:18px;padding:6px 6px;
    box-shadow:0 18px 40px -22px rgba(10,25,35,.55);
  }
  .bottom-nav button{
    flex:1;border:0;background:transparent;color:var(--muted);font-size:9.5px;display:flex;flex-direction:column;align-items:center;gap:3px;
    padding:7px 0;border-radius:12px;font-weight:600;transition:.16s;
  }
  .bottom-nav button svg{width:20px;height:20px}
  .bottom-nav button.active{color:var(--brand);background:color-mix(in srgb,var(--brand-soft) 65%,transparent)}
  .g3,.g4{grid-template-columns:repeat(2,1fr)}
  .keypoint-grid{grid-template-columns:1fr}
  .page-title{font-size:27px}
  .hero{padding:26px 22px 30px;border-radius:20px}
  .hero h1{font-size:26px}
  .hero-ring{display:none}
  .mod-hero{flex-wrap:wrap;padding:20px}
  .mh-side{margin-left:0;text-align:left;width:100%}
  .q-card{padding:22px 18px}
  .flash-face{padding:26px 22px}
  .flash-q{font-size:19.5px}
  .rate-row{grid-template-columns:repeat(2,1fr)}
  .badge-grid{grid-template-columns:repeat(2,1fr)}
  .profile-card{flex-wrap:wrap}
}
@media (max-width:560px){
  .g2,.g3,.g4,.mod-grid,.stat-grid{grid-template-columns:1fr}
  .hero h1{font-size:23px}
  .view{padding:6px 15px 100px}
  .topbar{padding:0 15px}
  .stat-grid{grid-template-columns:repeat(2,1fr)}
  .stat{padding:14px}
  .stat .stat-value{font-size:24px}
  .page-head{margin-bottom:18px}
  .page-title{font-size:24px}
  .note-section h3{font-size:16.5px;flex-wrap:wrap}
  .note-section h3 .sec-check{margin-left:0}
  .section-title{font-size:17px;margin-top:28px}
  .learn-toolbar{padding:10px}
  .flashcard,.flash-inner{min-height:300px}
  .flash-face{border-radius:18px}
  .q-stem{font-size:15.5px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important;scroll-behavior:auto!important}
}
@media print{
  .sidebar,.topbar,.bottom-nav,.hero-actions,.tabs,.mh-side,.site-foot,.rate-row,.hero-deco{display:none!important}
  .main{margin:0}
  .view{padding:0;max-width:none}
  .card,.note,.note-section,.mod-hero{box-shadow:none;border:0;background:none}
  body{background:#fff;font-size:12px;background-image:none}
  .note{max-width:none}
  .hero{display:none}
}

/* Hide Netlify's injected floating HUD so it never covers mobile nav */
iframe[data-nl-ready="1"],
iframe[src*="/.netlify/"] {
  display: none !important;
}

/* ---------- 指南原文库 ---------- */
.lib-section{margin-top:28px}
.lib-mod-head{display:flex;align-items:center;gap:13px;margin:26px 0 14px;padding-bottom:12px;border-bottom:1px solid var(--line)}
.lib-mod-icon{
  width:44px;height:44px;border-radius:12px;display:grid;place-items:center;font-size:21px;flex:0 0 44px;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.3);
}
.lib-mod-head h2{font-size:18.5px;line-height:1.35;margin:0;letter-spacing:.02em}
.lib-grid{display:grid;gap:12px;grid-template-columns:1fr}
.lib-card{
  position:relative;overflow:hidden;background:var(--card);border:1px solid var(--line);border-radius:15px;padding:17px 19px;
  box-shadow:var(--shadow);transition:border-color .18s,box-shadow .18s,transform .18s;
}
.lib-card::before{
  content:"";position:absolute;left:0;top:16px;bottom:16px;width:3px;border-radius:0 3px 3px 0;
  background:var(--gc,var(--brand));opacity:.5;transition:top .2s,bottom .2s,opacity .2s;
}
.lib-card:hover{border-color:var(--line-2);box-shadow:var(--shadow-md);transform:translateY(-2px)}
.lib-card:hover::before{top:0;bottom:0;opacity:.9}
.lib-card.read{border-color:color-mix(in srgb,var(--green) 32%,var(--line));background:linear-gradient(165deg,var(--green-soft),var(--card) 55%)}
.lc-top{display:flex;gap:6px;align-items:center;flex-wrap:wrap;margin-bottom:7px}
.lc-read{
  margin-left:auto;font-size:10px;font-weight:700;color:var(--muted);background:var(--bg-soft);padding:2px 9px;
  border-radius:99px;white-space:nowrap;letter-spacing:.03em;
}
.lc-read.on{color:var(--green);background:var(--green-soft)}
.lc-title{font-family:var(--serif);font-size:16px;font-weight:700;line-height:1.55;margin-bottom:4px;letter-spacing:.01em}
.lc-meta{font-size:11px;color:var(--muted);margin-bottom:9px;word-break:break-word;line-height:1.65}
.lc-points{margin:0 0 11px;padding-left:20px;font-size:12.3px;line-height:1.75;color:var(--ink-2)}
.lc-points li::marker{color:color-mix(in srgb,var(--green) 60%,var(--muted))}
.lc-actions{display:flex;gap:8px;flex-wrap:wrap;align-items:center}
.lib-progress{height:9px;background:var(--bg-soft);border-radius:99px;overflow:hidden;box-shadow:inset 0 1px 2px rgba(16,34,45,.05)}
.lib-progress>span{display:block;height:100%;background:linear-gradient(90deg,var(--brand),var(--teal));border-radius:99px;transition:width .5s}
.lib-select{
  border:1px solid var(--line);background:var(--card);color:var(--ink);border-radius:10px;padding:8px 11px;
  font-size:12.5px;font-family:inherit;max-width:280px;transition:.16s;
}
.lib-select:hover{border-color:var(--line-2)}
.lib-select:focus{outline:2px solid color-mix(in srgb,var(--brand) 35%,transparent);outline-offset:1px}
@media (min-width:1100px){.lib-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:560px){
  .lib-select{max-width:100%;width:100%}
  .lc-actions .btn{flex:1 1 auto;justify-content:center}
  .lib-mod-head h2{font-size:16px}
}

/* ---------- 知网检索台 ---------- */
.cnki-panel{
  position:relative;overflow:hidden;display:flex;gap:20px;align-items:center;justify-content:space-between;flex-wrap:wrap;
  background:linear-gradient(120deg,color-mix(in srgb,var(--brand-soft) 75%,var(--card)),var(--card) 70%);
  border:1px solid var(--line);border-radius:18px;padding:20px 22px;margin:18px 0;box-shadow:var(--shadow-md);
}
.cnki-panel::after{
  content:"";position:absolute;right:-60px;top:-80px;width:220px;height:220px;border-radius:50%;
  border:1px solid color-mix(in srgb,var(--brand) 13%,transparent);pointer-events:none;
}
.cnki-kicker{font-size:9.5px;letter-spacing:.2em;color:var(--brand);font-weight:800}
.cnki-panel h3{font-size:20px;margin:2px 0 10px;letter-spacing:.02em}
.cnki-row{display:flex;gap:8px;flex-wrap:wrap}
.cnki-row input{
  flex:1 1 260px;min-width:0;border:1px solid var(--line);background:var(--card);
  border-radius:10px;padding:10px 13px;font-size:13px;color:var(--ink);font-family:inherit;transition:.16s;
}
.cnki-row input:focus{outline:0;border-color:color-mix(in srgb,var(--brand) 50%,var(--line));box-shadow:var(--ring)}
.cnki-note{font-size:11px;color:var(--muted);max-width:340px;line-height:1.75}
@media (max-width:560px){
  .cnki-panel{padding:16px}
  .cnki-note{max-width:none}
  .cnki-row .btn{flex:1 1 auto;justify-content:center}
}

/* ---------- 记忆口诀库 ---------- */
.mn-toolbar{display:flex;gap:10px;flex-wrap:wrap;align-items:center;margin:16px 0 20px}
.mn-search{
  flex:1 1 300px;border:1px solid var(--line);background:var(--card);border-radius:11px;padding:10px 14px;
  font-size:13px;color:var(--ink);font-family:inherit;outline:none;transition:.16s;box-shadow:var(--shadow);
}
.mn-search:focus{border-color:color-mix(in srgb,var(--brand) 50%,var(--line));box-shadow:var(--ring)}
.mn-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.mn-card{
  position:relative;overflow:hidden;background:var(--card);border:1px solid var(--line);border-radius:16px;padding:18px 19px;
  box-shadow:var(--shadow);display:flex;flex-direction:column;gap:9px;transition:transform .18s,box-shadow .18s;
}
.mn-card::after{
  content:"";position:absolute;right:-40px;top:-50px;width:140px;height:140px;border-radius:50%;pointer-events:none;
  background:radial-gradient(circle,color-mix(in srgb,var(--gold) 10%,transparent),transparent 70%);
}
.mn-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-md)}
.mn-top{display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.mn-title{font-size:11.5px;color:var(--muted);font-weight:600}
.mn-mnemonic{font-family:var(--serif);font-size:21px;font-weight:700;line-height:1.55;color:var(--brand-ink);letter-spacing:.02em}
.mn-explain{font-size:12.5px;line-height:1.8;color:var(--ink-2)}
.mn-foot{display:flex;gap:6px;align-items:center;flex-wrap:wrap;margin-top:auto;padding-top:5px}
.mn-mini{padding:11px 0;border-bottom:1px dashed var(--line);cursor:pointer;transition:.15s}
.mn-mini:last-child{border-bottom:0}
.mn-mini:hover{padding-left:3px}
.mn-mini:hover .mn-mini-text{color:var(--brand)}
.mn-mini-text{font-family:var(--serif);font-size:16px;font-weight:700;line-height:1.5;margin:3px 0;transition:color .15s}
.method-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
.method-card{
  position:relative;background:linear-gradient(160deg,var(--card-2),color-mix(in srgb,var(--brand-soft) 20%,var(--card)));
  border:1px solid var(--line);border-radius:13px;padding:15px 17px;transition:transform .18s,box-shadow .18s;
}
.method-card:hover{transform:translateY(-1px);box-shadow:var(--shadow)}
.method-card b{display:block;font-size:13.5px;margin-bottom:5px;color:var(--brand-ink);letter-spacing:.02em}
.method-card p{font-size:12.2px;color:var(--ink-2);line-height:1.75;margin:0}
@media (max-width:900px){.mn-grid{grid-template-columns:1fr}.method-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:560px){.method-grid{grid-template-columns:1fr}.mn-mnemonic{font-size:19px}}

/* ---------- 跨科关联 ---------- */
.cross-strip{
  margin:18px 0 20px;padding:16px 18px;border:1px solid var(--line);border-radius:16px;
  background:linear-gradient(120deg,color-mix(in srgb,var(--violet) 6%,var(--card)),var(--card) 65%);
  box-shadow:var(--shadow);
}
.cross-strip-head{display:flex;align-items:center;gap:9px;flex-wrap:wrap;margin-bottom:11px}
.cross-strip-head b{font-family:var(--serif);font-size:16.5px;color:var(--ink);letter-spacing:.02em}
.cross-strip-head span{font-size:11px;color:var(--muted)}
.cross-strip-head .btn{margin-left:auto}
.cross-strip-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
.cross-mini{
  background:color-mix(in srgb,var(--card-2) 80%,transparent);border:1px solid var(--line);border-radius:12px;
  padding:11px 13px;min-width:0;transition:.18s;
}
.cross-mini:hover{border-color:color-mix(in srgb,var(--violet) 28%,var(--line-2));box-shadow:var(--shadow)}
.cross-mini-top{display:flex;align-items:center;gap:7px;flex-wrap:wrap}
.cross-mini-top b{font-size:13px;color:var(--ink)}
.cross-mini-line{font-size:11.5px;line-height:1.7;color:var(--ink-2);margin:5px 0 8px}
.cross-mini-foot{display:flex;gap:5px;flex-wrap:wrap}
.cross-mini-foot .chip{font-size:10px;padding:2px 8px}
.cross-toolbar{margin:16px 0 6px}
.xr-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;align-items:start}
.xr-card{
  position:relative;overflow:hidden;background:var(--card);border:1px solid var(--line);border-radius:17px;padding:18px 19px;
  box-shadow:var(--shadow);display:flex;flex-direction:column;gap:11px;transition:transform .18s,box-shadow .18s;
}
.xr-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-md)}
.xr-head{display:flex;align-items:flex-start;gap:11px}
.xr-icon{
  width:42px;height:42px;flex:0 0 42px;border-radius:12px;display:grid;place-items:center;font-size:20px;
  background:color-mix(in srgb,var(--violet) 11%,transparent);box-shadow:inset 0 1px 0 rgba(255,255,255,.25);
}
.xr-title{font-family:var(--serif);font-size:17.5px;font-weight:700;line-height:1.45;color:var(--ink);letter-spacing:.01em}
.xr-axis{font-size:10.5px;color:var(--muted);letter-spacing:.04em;margin-top:2px}
.xr-tags{margin-left:auto;display:flex;gap:4px;flex-wrap:wrap;justify-content:flex-end}
.xr-oneline{font-size:12.8px;line-height:1.75;color:var(--ink-2)}
.xr-block{font-size:12px}
.xr-label{display:inline-block;font-size:10px;font-weight:800;letter-spacing:.1em;color:var(--violet);margin-bottom:5px}
.xr-list{margin:0;padding-left:18px;line-height:1.75;color:var(--ink-2)}
.xr-list li{margin:2px 0}
.xr-mn{
  display:flex;gap:8px;border-radius:11px;padding:10px 12px;font-size:12px;line-height:1.7;
  background:linear-gradient(100deg,var(--gold-soft),color-mix(in srgb,var(--gold-soft) 50%,var(--card)));
  color:var(--ink-2);border-left:3px solid var(--gold);
}
.xr-mn>span{flex:0 0 auto}
.xr-flags{display:flex;flex-direction:column;gap:3px;font-size:11px;line-height:1.65;color:var(--coral)}
.xr-foot{display:flex;gap:5px;flex-wrap:wrap;margin-top:auto;padding-top:3px}
.xr-foot .chip{font-size:10px;padding:3px 8px}
@media (max-width:900px){.xr-grid,.cross-strip-grid{grid-template-columns:1fr}}
@media (max-width:560px){.xr-card{padding:15px}.xr-head{flex-wrap:wrap}.xr-tags{margin-left:0;justify-content:flex-start}}