/* ============================================================
   合约学院 · 设计系统 v3
   深空蓝黑 / 渐变描边 / 玻璃层次 / 行情氛围
============================================================ */
:root {
  --bg: #06090f;
  --bg2: #0b0f18;
  --bg3: #151b28;
  --card: #0d121d;
  --card-hi: #111726;
  --border: rgba(148,163,184,.10);
  --border-hi: rgba(148,163,184,.22);
  --line: rgba(255,255,255,.045);
  --text: #eaf0f7;
  --text2: #8b97a8;
  --accent: #f0b90b;
  --accent2: #ffd84d;
  --green: #0ecb81;
  --red: #f6465d;
  --blue: #4f8ef7;
  --purple: #a78bfa;
  --shadow: rgba(0,0,0,.5);
  --glow-gold: rgba(240,185,11,.25);
  --ease: cubic-bezier(.22,.61,.36,1);
  --r: 16px;
}
body.light {
  --bg: #eef1f7;
  --bg2: #f7f9fc;
  --bg3: #e3e8f1;
  --card: #ffffff;
  --card-hi: #ffffff;
  --border: rgba(30,45,80,.10);
  --border-hi: rgba(30,45,80,.22);
  --line: rgba(20,30,60,.05);
  --text: #16202e;
  --text2: #5e6b7e;
  --shadow: rgba(25,40,70,.12);
  --glow-gold: rgba(240,185,11,.16);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  font-size: 15px;
  line-height: 1.7;
  min-height: 100vh;
  transition: background .35s, color .35s;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
/* 全局氛围底：四角光雾 + 细网格 */
body::before {
  content: ''; position: fixed; inset: 0; z-index: -2; pointer-events: none;
  background:
    radial-gradient(900px 480px at 85% -8%, rgba(79,142,247,.075), transparent 62%),
    radial-gradient(800px 460px at -10% 12%, rgba(240,185,11,.06), transparent 60%),
    radial-gradient(700px 500px at 50% 115%, rgba(14,203,129,.05), transparent 60%);
}
body::after {
  content: ''; position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 44px 44px;
  -webkit-mask-image: radial-gradient(ellipse 90% 60% at 50% 0%, #000 30%, transparent 75%);
  mask-image: radial-gradient(ellipse 90% 60% at 50% 0%, #000 30%, transparent 75%);
}
button { font-family: inherit; cursor: pointer; -webkit-tap-highlight-color: transparent; }
.hidden { display: none !important; }

::-webkit-scrollbar { width: 10px; height: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--bg3); border-radius: 5px; border: 2px solid var(--bg); }
::-webkit-scrollbar-thumb:hover { background: var(--border-hi); }
::selection { background: rgba(240,185,11,.32); }

/* ============ 动画 ============ */
@keyframes fadeUp { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: none; } }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes popIn { 0% { transform: scale(.88) translateY(8px); opacity: 0; } 60% { transform: scale(1.02); } 100% { transform: scale(1) translateY(0); opacity: 1; } }
@keyframes shake { 0%,100% { transform: translateX(0); } 20% { transform: translateX(-7px); } 40% { transform: translateX(6px); } 60% { transform: translateX(-4px); } 80% { transform: translateX(3px); } }
@keyframes popCorrect { 0% { transform: scale(1); } 45% { transform: scale(1.03); } 100% { transform: scale(1); } }
@keyframes shimmer { 0% { transform: translateX(-100%); } 100% { transform: translateX(260%); } }
@keyframes glowPulse {
  0%,100% { box-shadow: 0 6px 22px var(--glow-gold); }
  50% { box-shadow: 0 6px 38px rgba(240,185,11,.42); }
}
@keyframes floatY { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-6px); } }
@keyframes bounce { 0% { transform: scale(.3); } 50% { transform: scale(1.25); } 100% { transform: scale(1); } }
@keyframes marquee { to { transform: translateX(-50%); } }

/* ============ 渐变描边工具类 ============ */
/* 仅在支持 mask-composite 的浏览器渲染，否则降级为普通边框（防止旧 WebView 整块渐变盖住内容） */
.gborder { position: relative; border: 1px solid var(--border); }
@supports ((mask-composite: exclude) or (-webkit-mask-composite: xor)) {
  .gborder { border-color: transparent; }
  .gborder::before {
    content: ''; position: absolute; inset: -1px; border-radius: inherit; padding: 1px;
    background: linear-gradient(140deg, rgba(240,185,11,.55), rgba(255,255,255,.07) 38%, rgba(255,255,255,.05) 62%, rgba(79,142,247,.4));
    -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
    -webkit-mask-composite: xor;
    mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
    mask-composite: exclude;
    pointer-events: none;
  }
  body.light .gborder::before {
    background: linear-gradient(140deg, rgba(200,150,0,.5), rgba(30,45,80,.12) 38%, rgba(30,45,80,.1) 62%, rgba(58,111,216,.4));
  }
}

/* ============ 顶栏 ============ */
.topbar {
  position: sticky; top: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 8px 12px;
  padding: 10px 22px;
  background: var(--bg2);
  background: color-mix(in srgb, var(--bg2) 72%, transparent);
  -webkit-backdrop-filter: blur(16px) saturate(1.4);
  backdrop-filter: blur(16px) saturate(1.4);
  border-bottom: 1px solid var(--border);
}
.topbar-left { display: flex; align-items: center; gap: 12px; min-width: 0; }
.back-site {
  flex-shrink: 0;
  display: inline-flex; align-items: center;
  background: var(--bg3); border: 1px solid var(--border); color: var(--text2);
  padding: 6px 13px; border-radius: 10px; font-size: 13px; text-decoration: none;
  white-space: nowrap; transition: all .2s var(--ease);
}
.back-site:hover { border-color: rgba(240,185,11,.5); color: var(--accent); transform: translateX(-1px); }
.brand { display: flex; align-items: center; gap: 10px; cursor: pointer; user-select: none; transition: opacity .2s; }
.brand:active { opacity: .7; }
.brand-icon {
  width: 34px; height: 34px; border-radius: 10px; font-size: 17px;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, #2b2410, #161310);
  border: 1px solid rgba(240,185,11,.35);
  box-shadow: 0 2px 10px var(--glow-gold), inset 0 1px 0 rgba(255,255,255,.08);
}
body.light .brand-icon { background: linear-gradient(135deg, #fff7e0, #ffeeba); }
.brand-name {
  font-size: 16.5px; font-weight: 800; letter-spacing: .3px; white-space: nowrap;
  background: linear-gradient(115deg, #fff 10%, var(--accent2) 45%, var(--accent) 80%);
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
body.light .brand-name { background: linear-gradient(115deg, #2a2008, #a8780a 60%, #f0b90b); -webkit-background-clip: text; background-clip: text; }
.brand-sub { font-size: 10.5px; color: var(--text2); margin-top: 5px; letter-spacing: .8px; }
.topbar-right { display: flex; align-items: center; gap: 11px; }

.xp-box {
  display: flex; align-items: center; gap: 8px;
  background: var(--bg3); border: 1px solid var(--border);
  padding: 4px 10px 4px 4px; border-radius: 20px;
}
.level-badge {
  background: linear-gradient(135deg, var(--accent2), #e8960c);
  color: #1a1200; font-weight: 800; font-size: 11.5px;
  padding: 3px 11px; border-radius: 14px;
  box-shadow: 0 2px 8px var(--glow-gold);
}
.xp-bar { width: 92px; height: 7px; background: var(--bg); border-radius: 4px; overflow: hidden; position: relative; }
body.light .xp-bar { background: #d6dce8; }
.xp-fill {
  height: 100%; width: 0%;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  transition: width .8s var(--ease); border-radius: 4px;
  position: relative; overflow: hidden;
}
.xp-fill::after {
  content: ''; position: absolute; top: 0; left: 0; height: 100%; width: 40%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,.55), transparent);
  animation: shimmer 2.4s 1s infinite;
}
.xp-text { font-size: 11.5px; color: var(--text2); font-variant-numeric: tabular-nums; }
.icon-btn {
  background: var(--bg3); border: 1px solid var(--border); color: var(--text);
  width: 34px; height: 34px; border-radius: 10px; font-size: 15px;
  transition: all .2s var(--ease);
}
.icon-btn:hover { border-color: var(--border-hi); transform: translateY(-1px); }
.icon-btn:active { transform: scale(.9); }

/* ============ 主区 ============ */
#main { max-width: 1020px; margin: 0 auto; padding: 0 18px 70px; }
#homeView, #lessonView { animation: fadeIn .3s ease both; }

/* ============ Hero ============ */
.hero {
  position: relative; margin: 18px -18px 0; padding: 58px 24px 46px;
  overflow: hidden; text-align: center;
}
#heroCv {
  position: absolute; inset: 0; width: 100%; height: 100%;
  opacity: .16; pointer-events: none;
  -webkit-mask-image: radial-gradient(ellipse 75% 80% at 50% 45%, #000 30%, transparent 78%);
  mask-image: radial-gradient(ellipse 75% 80% at 50% 45%, #000 30%, transparent 78%);
}
.hero-inner { position: relative; z-index: 1; }
.hero-pill {
  display: inline-block; font-size: 12.5px; color: var(--text2);
  background: var(--bg3);
  background: color-mix(in srgb, var(--bg3) 75%, transparent);
  border: 1px solid var(--border-hi); border-radius: 20px;
  padding: 5px 16px; margin-bottom: 18px;
  -webkit-backdrop-filter: blur(8px); backdrop-filter: blur(8px);
  animation: fadeUp .5s var(--ease) both;
}
.hero h1 {
  font-size: clamp(30px, 5.6vw, 46px); line-height: 1.22;
  font-weight: 900; letter-spacing: 1px; margin-bottom: 14px;
  animation: fadeUp .5s .06s var(--ease) both;
}
.hero h1 .hl {
  background: linear-gradient(115deg, var(--accent2) 10%, var(--accent) 55%, #e8960c);
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 4px 22px var(--glow-gold));
}
.hero p {
  color: var(--text2); max-width: 520px; margin: 0 auto; font-size: 15.5px;
  animation: fadeUp .5s .12s var(--ease) both;
}
.hero-cta {
  margin-top: 26px; padding: 0; font-size: 16px; font-weight: 800;
  display: inline-flex; flex-direction: column; gap: 1px; align-items: center;
  padding: 13px 40px 11px;
  background: linear-gradient(135deg, #12d189, #08a96b);
  color: #fff; border-radius: 16px;
  box-shadow: 0 10px 34px rgba(14,203,129,.35), inset 0 1px 0 rgba(255,255,255,.25);
  animation: fadeUp .5s .18s var(--ease) both, floatY 3.4s 1.4s ease-in-out infinite;
}
.hero-cta .cta-sub { font-size: 11.5px; font-weight: 500; opacity: .85; }
.hero-cta:disabled { animation: fadeUp .5s .18s var(--ease) both; }
.hero-stats {
  display: flex; justify-content: center; gap: 12px; margin-top: 34px; flex-wrap: wrap;
  animation: fadeUp .5s .24s var(--ease) both;
}
.hstat {
  min-width: 118px; padding: 14px 18px; border-radius: 16px; text-align: center;
  background: var(--card);
  background: color-mix(in srgb, var(--card) 78%, transparent);
  -webkit-backdrop-filter: blur(10px); backdrop-filter: blur(10px);
  transition: transform .25s var(--ease);
}
.hstat:hover { transform: translateY(-3px); }
.hstat .num { font-size: 27px; font-weight: 900; color: var(--text); font-variant-numeric: tabular-nums; letter-spacing: .5px; }
.hstat .num .dim { font-size: 16px; color: var(--text2); font-weight: 700; }
.hstat .lbl { font-size: 11.5px; color: var(--text2); margin-top: 1px; letter-spacing: .5px; }

/* ============ 行情条 ============ */
.ticker {
  position: relative; margin: 6px -18px 30px; padding: 9px 0;
  border-top: 1px solid var(--border); border-bottom: 1px solid var(--border);
  overflow: hidden;
  background: var(--bg2);
  background: color-mix(in srgb, var(--bg2) 55%, transparent);
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 6%, #000 94%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 6%, #000 94%, transparent);
}
.ticker-track { display: flex; gap: 38px; width: max-content; animation: marquee 30s linear infinite; padding-left: 20px; }
.ticker:hover .ticker-track { animation-play-state: paused; }
.tk { display: inline-flex; align-items: center; gap: 8px; font-size: 12.5px; white-space: nowrap; }
.tk b { color: var(--text); font-weight: 700; letter-spacing: .5px; }
.tk-p { color: var(--text2); font-variant-numeric: tabular-nums; }
.tk-c { font-weight: 700; font-variant-numeric: tabular-nums; font-size: 12px; }
.tk-c.up { color: var(--green); }
.tk-c.down { color: var(--red); }
.ticker-tag {
  position: absolute; right: 10px; top: 50%; transform: translateY(-50%);
  font-size: 10px; color: var(--text2); background: var(--bg3);
  padding: 1px 8px; border-radius: 8px; border: 1px solid var(--border);
}

/* ============ 章节 ============ */
.chapter { margin-bottom: 38px; animation: fadeUp .55s var(--ease) both; position: relative; }
.chapter-ghost {
  position: absolute; right: 0; top: -28px; z-index: 0;
  font-size: 88px; font-weight: 900; letter-spacing: -2px;
  color: transparent;
  -webkit-text-stroke: 1px rgba(148,163,184,.10);
  pointer-events: none; user-select: none;
  font-variant-numeric: tabular-nums;
}
body.light .chapter-ghost { -webkit-text-stroke: 1px rgba(30,45,80,.10); }
.chapter-head { display: flex; align-items: center; gap: 14px; margin-bottom: 14px; position: relative; z-index: 1; }
.chapter-icon {
  width: 48px; height: 48px; border-radius: 14px; font-size: 23px;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(145deg, var(--bg3), var(--card));
  border: 1px solid var(--border-hi);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.06), 0 4px 14px var(--shadow);
}
.chapter-title { font-size: 18.5px; font-weight: 800; letter-spacing: .3px; }
.chapter-desc { font-size: 13px; color: var(--text2); }
.chapter-prog { margin-left: auto; font-size: 13px; color: var(--text2); white-space: nowrap; display: flex; align-items: center; gap: 8px; font-variant-numeric: tabular-nums; }
.ch-bar { width: 76px; height: 6px; background: var(--bg3); border-radius: 3px; overflow: hidden; }
.ch-fill { height: 100%; background: linear-gradient(90deg, var(--accent), var(--accent2)); border-radius: 3px; transition: width .7s var(--ease); }

/* ============ 关卡卡片 ============ */
.lesson-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(216px, 1fr)); gap: 13px; position: relative; z-index: 1; }
.lesson-card {
  background: linear-gradient(165deg, var(--card-hi), var(--card));
  border: 1px solid var(--border); border-radius: var(--r);
  padding: 15px 17px 13px; cursor: pointer; position: relative;
  transition: transform .25s var(--ease), border-color .25s, box-shadow .25s;
  min-height: 104px;
  display: flex; flex-direction: column; gap: 7px;
  overflow: hidden;
  animation: fadeUp .5s var(--ease) both;
  box-shadow: inset 0 1px 0 rgba(255,255,255,.035);
}
.lesson-card::after {
  content: ''; position: absolute; inset: 0; pointer-events: none;
  background: linear-gradient(120deg, transparent 32%, rgba(255,255,255,.045) 48%, transparent 64%);
  transform: translateX(-120%); transition: transform .55s ease;
}
.lesson-card:hover { border-color: rgba(240,185,11,.55); transform: translateY(-4px); box-shadow: 0 14px 30px var(--shadow), inset 0 1px 0 rgba(255,255,255,.05); }
.lesson-card:hover::after { transform: translateX(120%); }
.lesson-card:active { transform: translateY(-1px) scale(.98); }
.lesson-card.locked { opacity: .4; cursor: not-allowed; filter: saturate(.4); }
.lesson-card.locked:hover { transform: none; border-color: var(--border); box-shadow: inset 0 1px 0 rgba(255,255,255,.035); }
.lesson-card.locked:hover::after { transform: translateX(-120%); }
.lesson-card.next-up { animation: fadeUp .5s var(--ease) both, glowPulse 2.8s 1.2s ease-in-out infinite; }

.lcard-top { display: flex; align-items: center; gap: 8px; }
.lnum-chip {
  font-size: 11px; font-weight: 800; color: var(--accent);
  background: rgba(240,185,11,.1); border: 1px solid rgba(240,185,11,.3);
  border-radius: 7px; padding: 0px 7px; font-variant-numeric: tabular-nums;
}
.lesson-card.done .lnum-chip { color: var(--green); background: rgba(14,203,129,.09); border-color: rgba(14,203,129,.3); }
.lesson-card .lnum { font-size: 11px; color: var(--text2); }
.lesson-card .lstate { margin-left: auto; font-size: 13px; color: var(--text2); }
.lesson-card .ltitle { font-weight: 700; font-size: 14.5px; line-height: 1.45; letter-spacing: .2px; }
.lesson-card .ltags { display: flex; gap: 6px; margin-top: auto; }
.ltag {
  font-size: 10.5px; padding: 1.5px 9px; border-radius: 10px;
  background: var(--bg3); color: var(--text2); border: 1px solid var(--border);
}
.ltag.quiz { color: var(--blue); border-color: rgba(79,142,247,.28); background: rgba(79,142,247,.07); }
.ltag.game { color: var(--green); border-color: rgba(14,203,129,.28); background: rgba(14,203,129,.07); }
.ltag.tool { color: var(--purple); border-color: rgba(167,139,250,.28); background: rgba(167,139,250,.07); }
.lcard-line {
  position: absolute; left: 0; right: 0; bottom: 0; height: 2.5px;
  background: var(--bg3);
}
.lcard-line::after {
  content: ''; position: absolute; inset: 0; width: 0%;
  background: linear-gradient(90deg, var(--green), #2fe39a);
  transition: width .5s var(--ease);
}
.lcard-line.full::after { width: 100%; }

/* ============ 徽章墙 ============ */
.badge-wall {
  background: linear-gradient(165deg, var(--card-hi), var(--card));
  border: 1px solid var(--border); border-radius: 18px;
  padding: 20px 24px; margin-bottom: 36px;
  animation: fadeUp .55s .1s var(--ease) both;
  box-shadow: inset 0 1px 0 rgba(255,255,255,.035);
}
.badge-wall h3 { font-size: 15px; margin-bottom: 15px; letter-spacing: .3px; }
.badges { display: flex; gap: 15px; flex-wrap: wrap; }
.badge-item { text-align: center; width: 76px; transition: transform .25s var(--ease); }
.badge-item:hover { transform: translateY(-3px); }
.badge-item .bicon {
  width: 54px; height: 54px; margin: 0 auto 6px; border-radius: 16px;
  background: var(--bg3); border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center; font-size: 25px;
  filter: grayscale(1); opacity: .35;
  transition: all .35s var(--ease);
}
.badge-item.earned .bicon {
  filter: none; opacity: 1; border-color: rgba(240,185,11,.5);
  background: radial-gradient(circle at 35% 28%, rgba(240,185,11,.2), var(--bg3) 70%);
  box-shadow: 0 4px 18px var(--glow-gold), inset 0 1px 0 rgba(255,255,255,.12);
}
.badge-item.earned:hover .bicon { transform: rotate(-6deg) scale(1.08); }
.badge-item .bname { font-size: 11px; color: var(--text2); line-height: 1.3; }
.badge-item.earned .bname { color: var(--text); font-weight: 600; }

/* ============ 课程页 ============ */
.lesson-top {
  display: flex; align-items: center; gap: 13px; margin: 22px 0 20px; flex-wrap: wrap;
  animation: fadeUp .45s var(--ease) both;
}
.back-btn {
  background: var(--bg3); border: 1px solid var(--border); color: var(--text);
  padding: 8px 17px; border-radius: 11px; font-size: 14px;
  transition: all .2s var(--ease);
}
.back-btn:hover { border-color: var(--border-hi); transform: translateX(-2px); }
.back-btn:active { transform: scale(.94); }
.lesson-h1 { font-size: 22px; font-weight: 800; letter-spacing: .3px; }
.lesson-meta { font-size: 12.5px; color: var(--text2); }

.block { margin-bottom: 18px; animation: fadeUp .5s var(--ease) both; }
.block-text, .quiz-box, .widget-box {
  background: linear-gradient(168deg, var(--card-hi), var(--card));
  border: 1px solid var(--border); border-radius: 18px;
  padding: 23px 27px;
  box-shadow: inset 0 1px 0 rgba(255,255,255,.035), 0 4px 18px rgba(0,0,0,.14);
}
body.light .block-text, body.light .quiz-box, body.light .widget-box { box-shadow: 0 3px 16px var(--shadow); }

.block-text h3 {
  font-size: 17px; margin-bottom: 12px; color: var(--text); font-weight: 800;
  display: flex; align-items: center; gap: 9px;
}
.block-text h3::before {
  content: ''; width: 4px; height: 17px; border-radius: 2px;
  background: linear-gradient(180deg, var(--accent2), var(--accent));
  box-shadow: 0 0 8px var(--glow-gold);
  flex-shrink: 0;
}
.block-text h4 { font-size: 15px; margin: 16px 0 7px; color: var(--accent2); }
body.light .block-text h4 { color: #a8780a; }
.block-text p { margin-bottom: 10px; }
.block-text p:last-child { margin-bottom: 0; }
.block-text ul, .block-text ol { padding-left: 22px; margin-bottom: 10px; }
.block-text li { margin-bottom: 6px; }
.block-text strong { color: var(--accent2); font-weight: 700; }
body.light .block-text strong { color: #a8780a; }
.block-text .tip {
  background: rgba(79,142,247,.07); border: 1px solid rgba(79,142,247,.18); border-left: 3px solid var(--blue);
  padding: 12px 16px; border-radius: 10px; margin: 14px 0; font-size: 14px;
}
.block-text .warn {
  background: rgba(246,70,93,.07); border: 1px solid rgba(246,70,93,.18); border-left: 3px solid var(--red);
  padding: 12px 16px; border-radius: 10px; margin: 14px 0; font-size: 14px;
}
.table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; margin: 13px 0; border-radius: 12px; }
.block-text table {
  width: 100%; border-collapse: separate; border-spacing: 0; margin: 13px 0; font-size: 14px;
  border: 1px solid var(--border); border-radius: 12px; overflow: hidden;
}
.block-text th, .block-text td { border-bottom: 1px solid var(--border); border-right: 1px solid var(--border); padding: 9px 14px; text-align: left; }
.block-text th:last-child, .block-text td:last-child { border-right: none; }
.block-text tr:last-child td { border-bottom: none; }
.block-text th { background: var(--bg3); font-weight: 700; font-size: 13px; letter-spacing: .3px; color: var(--text2); text-transform: uppercase; }
.block-text tr { transition: background .15s; }
.block-text tr:hover td { background: rgba(255,255,255,.015); }
body.light .block-text tr:hover td { background: rgba(20,30,60,.022); }
.block-text code {
  background: var(--bg3); padding: 1.5px 8px; border-radius: 6px;
  font-family: "SF Mono", Menlo, Consolas, monospace; font-size: 13px;
  border: 1px solid var(--border); color: var(--accent2);
}
body.light .block-text code { color: #a8780a; }

/* ============ Quiz ============ */
.quiz-q { font-weight: 700; font-size: 15.5px; margin-bottom: 15px; }
.quiz-q .qbadge {
  display: inline-block; background: rgba(79,142,247,.12); color: var(--blue);
  font-size: 11px; padding: 2px 10px; border-radius: 10px; margin-right: 8px; vertical-align: 2px;
  border: 1px solid rgba(79,142,247,.25); font-weight: 700;
}
.quiz-opts { display: flex; flex-direction: column; gap: 9px; }
.quiz-opt {
  text-align: left; background: var(--bg3); border: 1px solid var(--border);
  color: var(--text); padding: 13px 17px; border-radius: 12px; font-size: 14.5px;
  transition: all .2s var(--ease); line-height: 1.55;
}
.quiz-opt:hover:not(:disabled) { border-color: rgba(240,185,11,.5); transform: translateX(5px); background: var(--card-hi); }
.quiz-opt:active:not(:disabled) { transform: translateX(5px) scale(.985); }
.quiz-opt:disabled { cursor: default; }
.quiz-opt.correct {
  border-color: rgba(14,203,129,.6); background: rgba(14,203,129,.1);
  animation: popCorrect .4s var(--ease);
  box-shadow: 0 4px 16px rgba(14,203,129,.18);
}
.quiz-opt.wrong {
  border-color: rgba(246,70,93,.55); background: rgba(246,70,93,.08);
  animation: shake .4s ease;
  opacity: .6;
}
.quiz-explain {
  margin-top: 13px; padding: 14px 17px; border-radius: 12px; font-size: 14px;
  background: var(--bg3); border: 1px dashed var(--border-hi); display: none;
}
.quiz-explain.show { display: block; animation: fadeUp .35s var(--ease); }
.quiz-explain .ok { color: var(--green); font-weight: 800; }
.quiz-explain .no { color: var(--red); font-weight: 800; }

/* ============ Widget ============ */
.widget-box h3 { font-size: 16px; margin-bottom: 14px; font-weight: 800; }
.widget-box h3 .wbadge {
  display: inline-block; background: rgba(167,139,250,.12); color: var(--purple);
  font-size: 11px; padding: 2px 10px; border-radius: 10px; margin-right: 8px; vertical-align: 2px;
  border: 1px solid rgba(167,139,250,.25); font-weight: 700;
}

.ctrl-row { display: flex; align-items: center; gap: 12px; margin-bottom: 13px; flex-wrap: wrap; }
.ctrl-row label { font-size: 13.5px; color: var(--text2); min-width: 86px; }
.ctrl-row input[type=range] { flex: 1; min-width: 140px; accent-color: var(--accent); height: 5px; cursor: grab; }
.ctrl-row input[type=range]:active { cursor: grabbing; }
.ctrl-row .val { font-weight: 800; min-width: 90px; text-align: right; font-variant-numeric: tabular-nums; }
.ctrl-row select, .ctrl-row input[type=number] {
  background: var(--bg3); border: 1px solid var(--border); color: var(--text);
  padding: 8px 12px; border-radius: 10px; font-size: 14px;
  transition: border-color .2s;
}
.ctrl-row input[type=number]:focus, .ctrl-row select:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(240,185,11,.12); }

.result-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 10px; margin-top: 15px; }
.result-cell {
  background: var(--bg3); border: 1px solid var(--border); border-radius: 13px;
  padding: 12px 15px; text-align: center;
  transition: all .25s var(--ease);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.03);
}
.result-cell:hover { border-color: var(--border-hi); transform: translateY(-2px); }
.result-cell .rlbl { font-size: 11.5px; color: var(--text2); letter-spacing: .3px; }
.result-cell .rval { font-size: 19px; font-weight: 800; font-variant-numeric: tabular-nums; transition: color .2s; }
.rval.up { color: var(--green); }
.rval.down { color: var(--red); }
.rval.warn-c { color: var(--accent); }

.seg { display: inline-flex; background: var(--bg); border: 1px solid var(--border); border-radius: 12px; overflow: hidden; padding: 3px; gap: 3px; }
body.light .seg { background: #dde3ee; }
.seg button {
  background: transparent; border: none; color: var(--text2);
  padding: 7px 18px; font-size: 13.5px; font-weight: 700; border-radius: 9px;
  transition: all .2s var(--ease);
}
.seg button:hover { color: var(--text); }
.seg button.active.long { background: linear-gradient(135deg, #12d189, #08a96b); color: #fff; box-shadow: 0 2px 10px rgba(14,203,129,.35); }
.seg button.active.short { background: linear-gradient(135deg, var(--red), #d4344a); color: #fff; box-shadow: 0 2px 10px rgba(246,70,93,.35); }
.seg button.active.neutral { background: linear-gradient(135deg, var(--accent2), var(--accent)); color: #1a1200; box-shadow: 0 2px 10px var(--glow-gold); }

/* ============ 图表 & 模拟器 ============ */
.chart-wrap {
  position: relative; background: var(--bg); border: 1px solid var(--border);
  border-radius: 14px; overflow: hidden;
  box-shadow: inset 0 2px 10px rgba(0,0,0,.3);
}
body.light .chart-wrap { box-shadow: inset 0 1px 6px rgba(20,30,60,.07); background: #fafbfd; }
.chart-wrap canvas { display: block; width: 100%; }

.sim-layout { display: grid; grid-template-columns: 1fr 254px; gap: 14px; }
.sim-panel {
  background: var(--bg3); border: 1px solid var(--border); border-radius: 14px;
  padding: 15px; display: flex; flex-direction: column; gap: 10px;
  box-shadow: inset 0 1px 0 rgba(255,255,255,.03);
}
.sim-row { display: flex; justify-content: space-between; font-size: 13.5px; }
.sim-row .k { color: var(--text2); }
.sim-row .v { font-weight: 700; font-variant-numeric: tabular-nums; }
.sim-btns { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }

.btn {
  border: none; border-radius: 12px; padding: 11px 14px; font-size: 14px; font-weight: 800;
  transition: all .2s var(--ease); letter-spacing: .3px;
}
.btn:hover { filter: brightness(1.08); transform: translateY(-1px); }
.btn:active { transform: scale(.96); }
.btn:disabled { opacity: .35; cursor: not-allowed; filter: none; transform: none; }
.btn-long { background: linear-gradient(135deg, #12d189, #08a96b); color: #fff; box-shadow: 0 5px 16px rgba(14,203,129,.28), inset 0 1px 0 rgba(255,255,255,.2); }
.btn-short { background: linear-gradient(135deg, var(--red), #d4344a); color: #fff; box-shadow: 0 5px 16px rgba(246,70,93,.28), inset 0 1px 0 rgba(255,255,255,.18); }
.btn-close { background: linear-gradient(135deg, var(--accent2), var(--accent)); color: #1a1200; box-shadow: 0 5px 16px var(--glow-gold), inset 0 1px 0 rgba(255,255,255,.3); }
.btn-plain { background: var(--bg3); color: var(--text); border: 1px solid var(--border); }
.btn-plain:hover { border-color: var(--border-hi); }
.btn-blue { background: linear-gradient(135deg, #5d9bff, #3a6fd8); color: #fff; box-shadow: 0 5px 16px rgba(79,142,247,.28), inset 0 1px 0 rgba(255,255,255,.2); }
.btn-block { width: 100%; }

.speed-ctrl { display: flex; gap: 6px; align-items: center; }
.speed-ctrl button {
  background: var(--bg2); border: 1px solid var(--border); color: var(--text);
  width: 34px; height: 32px; border-radius: 9px; font-size: 13px;
  transition: all .18s var(--ease);
}
.speed-ctrl button:hover { border-color: var(--border-hi); }
.speed-ctrl button:active { transform: scale(.88); }
.speed-ctrl button.active { border-color: rgba(240,185,11,.6); color: var(--accent); background: rgba(240,185,11,.08); }

.ind-toggles { display: flex; gap: 6px; flex-wrap: wrap; margin: 10px 0; }
.ind-toggle {
  background: var(--bg3); border: 1px solid var(--border); color: var(--text2);
  padding: 5px 14px; border-radius: 18px; font-size: 12.5px; font-weight: 600;
  transition: all .2s var(--ease);
}
.ind-toggle:hover:not(.locked) { border-color: var(--border-hi); transform: translateY(-1px); }
.ind-toggle.on { border-color: rgba(240,185,11,.55); color: var(--accent); background: rgba(240,185,11,.09); box-shadow: 0 2px 10px var(--glow-gold); }
.ind-toggle.locked { opacity: .38; cursor: not-allowed; }

.pos-strip {
  display: flex; gap: 14px; align-items: center; font-size: 13px; flex-wrap: wrap;
  background: var(--bg3); border: 1px solid var(--border); border-radius: 12px; padding: 10px 16px;
  margin-top: 10px;
}
.pos-strip .side-long { color: var(--green); font-weight: 800; }
.pos-strip .side-short { color: var(--red); font-weight: 800; }

/* ============ 完成区 ============ */
.lesson-done {
  text-align: center; padding: 30px; border-radius: 18px;
  background: linear-gradient(168deg, var(--card-hi), var(--card));
  border: 1px solid var(--border);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.035);
  animation: fadeUp .45s var(--ease) both;
}
.lesson-done .emoji { font-size: 46px; }
.lesson-done h3 { margin: 8px 0 6px; font-weight: 800; }
.lesson-done p { color: var(--text2); font-size: 14px; margin-bottom: 17px; }
.lesson-nav { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; }

/* ============ H5 底部操作栏 ============ */
.mbar {
  display: none;
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 90;
  padding: 10px 14px calc(10px + env(safe-area-inset-bottom));
  background: var(--bg2);
  background: color-mix(in srgb, var(--bg2) 82%, transparent);
  -webkit-backdrop-filter: blur(16px) saturate(1.3);
  backdrop-filter: blur(16px) saturate(1.3);
  border-top: 1px solid var(--border);
  gap: 10px;
}
.mbar .btn { padding: 13px 18px; font-size: 14.5px; border-radius: 13px; }

/* ============ toast ============ */
#toastWrap { position: fixed; top: 62px; right: 16px; z-index: 999; display: flex; flex-direction: column; gap: 8px; }
.toast {
  background: var(--bg2);
  background: color-mix(in srgb, var(--bg2) 86%, transparent);
  -webkit-backdrop-filter: blur(12px); backdrop-filter: blur(12px);
  border: 1px solid var(--border-hi); border-left: 3px solid var(--accent);
  color: var(--text); padding: 12px 19px; border-radius: 13px; font-size: 14px;
  box-shadow: 0 12px 34px var(--shadow);
  animation: toastIn .35s var(--ease);
  max-width: 320px;
}
.toast.xp { border-left-color: var(--accent); }
.toast.badge-t { border-left-color: var(--purple); }
.toast.good { border-left-color: var(--green); }
.toast.bad { border-left-color: var(--red); }
@keyframes toastIn { from { transform: translateX(40px) scale(.95); opacity: 0; } to { transform: none; opacity: 1; } }

/* ============ modal ============ */
#modalWrap {
  position: fixed; inset: 0; z-index: 998;
  background: rgba(3,5,10,.66);
  -webkit-backdrop-filter: blur(8px); backdrop-filter: blur(8px);
  display: flex; align-items: center; justify-content: center; padding: 20px;
  animation: fadeIn .22s ease;
}
.modal {
  background: linear-gradient(168deg, var(--card-hi), var(--bg2));
  border: 1px solid var(--border-hi); border-radius: 22px;
  padding: 32px 34px; max-width: 430px; width: 100%; text-align: center;
  animation: popIn .34s var(--ease);
  box-shadow: 0 30px 80px rgba(0,0,0,.55), inset 0 1px 0 rgba(255,255,255,.06);
}
.modal .emoji { font-size: 48px; }
.modal h3 { margin: 10px 0 8px; font-size: 20px; font-weight: 800; }
.modal p { color: var(--text2); font-size: 14px; margin-bottom: 18px; }
.modal .lesson-nav { flex-direction: column; gap: 8px; }
.modal .lesson-nav .btn { width: 100%; padding: 13px; white-space: normal; line-height: 1.45; }
.congrats-emoji { animation: bounce .6s var(--ease); }

#confettiCv { position: fixed; inset: 0; z-index: 1000; pointer-events: none; }

.footer { text-align: center; padding: 20px 16px calc(20px + env(safe-area-inset-bottom)); color: var(--text2); font-size: 12px; border-top: 1px solid var(--border); }

/* ============ v2 互动组件 ============ */
.vs-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.vs-card {
  background: var(--bg3); border: 1px solid var(--border); border-radius: 14px;
  padding: 16px; text-align: center;
  transition: all .25s var(--ease);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.03);
}
.vs-card:hover { transform: translateY(-2px); border-color: var(--border-hi); }
.vs-card .vs-title { font-weight: 700; font-size: 14px; margin-bottom: 8px; }
.vs-card .vs-pnl { font-size: 20px; font-weight: 800; font-variant-numeric: tabular-nums; transition: color .2s; }
.vs-card .vs-note { font-size: 12px; color: var(--text2); margin-top: 4px; }

.tl { position: relative; padding-left: 18px; border-left: 2px solid var(--border); display: flex; flex-direction: column; gap: 10px; margin-top: 6px; }
.tl-item {
  cursor: pointer; background: var(--bg3); border: 1px solid var(--border);
  border-radius: 12px; padding: 12px 16px; position: relative;
  transition: all .22s var(--ease);
}
.tl-item::before {
  content: ''; position: absolute; left: -24px; top: 17px;
  width: 9px; height: 9px; border-radius: 50%;
  background: var(--border-hi); border: 2px solid var(--bg);
  transition: all .25s;
}
.tl-item.open::before { background: var(--accent); box-shadow: 0 0 10px var(--glow-gold); }
.tl-item:hover { border-color: rgba(240,185,11,.5); transform: translateX(3px); }
.tl-item.open { border-color: rgba(240,185,11,.45); }
.tl-year { color: var(--accent); font-weight: 800; font-size: 13.5px; font-variant-numeric: tabular-nums; }
.tl-t { color: var(--text); font-weight: 700; margin-left: 6px; }
.tl-arrow { float: right; color: var(--text2); transition: transform .25s var(--ease); }
.tl-item.open .tl-arrow { transform: rotate(90deg); }
.tl-body { display: none; color: var(--text2); font-size: 13.5px; margin-top: 7px; line-height: 1.65; }
.tl-item.open .tl-body { display: block; animation: fadeUp .3s var(--ease); }

.pm-scene {
  background: var(--bg3); border: 1px solid var(--border); border-left: 3px solid var(--accent);
  border-radius: 12px; padding: 15px 18px; font-size: 14.5px; line-height: 1.7;
}

/* ============================================================
   H5 / 移动端适配
============================================================ */
@media (max-width: 760px) {
  .sim-layout { grid-template-columns: 1fr; }
  .footer { padding-bottom: calc(86px + env(safe-area-inset-bottom)); }
  /* 课程页给底部操作栏留位 */
  #lessonView { padding-bottom: calc(96px + env(safe-area-inset-bottom)); }
  .mbar { display: flex; }
  #lessonFooter .lesson-done .lesson-nav { display: none; }  /* 桌面按钮组收进底栏 */
  #lessonFooter .lesson-done { padding: 18px; }
}

@media (max-width: 640px) {
  body { font-size: 14.5px; }
  .topbar { padding: 8px 12px 9px; row-gap: 7px; }
  .topbar-left { width: 100%; justify-content: flex-start; gap: 9px; }
  .back-site { padding: 5px 11px; font-size: 12px; }
  .brand { min-width: 0; }
  .brand-sub { display: none; }
  .brand-name { font-size: 14.5px; overflow: hidden; text-overflow: ellipsis; }
  .brand-icon { width: 28px; height: 28px; font-size: 14px; border-radius: 8px; flex-shrink: 0; }
  .topbar-right { width: 100%; justify-content: space-between; gap: 8px; }
  .xp-box { flex: 1; max-width: 260px; }
  .xp-bar { flex: 1; width: auto; }
  .xp-text { display: inline; font-size: 11px; }
  .icon-btn { width: 32px; height: 32px; }

  #main { padding: 0 12px 56px; }
  .hero { margin: 10px -12px 0; padding: 40px 18px 34px; }
  .hero-pill { font-size: 11.5px; padding: 4px 13px; margin-bottom: 14px; }
  .hero p { font-size: 14px; }
  .hero-cta { width: 100%; max-width: 420px; padding: 13px 20px 11px; }
  .hero-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 9px; margin-top: 24px; }
  .hstat { min-width: 0; padding: 12px 10px; }
  .hstat .num { font-size: 22px; }
  .ticker { margin: 4px -12px 22px; }

  .chapter { margin-bottom: 30px; }
  .chapter-ghost { font-size: 64px; top: -18px; }
  .chapter-icon { width: 42px; height: 42px; font-size: 20px; border-radius: 12px; }
  .chapter-title { font-size: 16.5px; }
  .chapter-desc { font-size: 12px; }
  .chapter-prog .ch-bar { display: none; }

  .lesson-grid { grid-template-columns: 1fr 1fr; gap: 9px; }
  .lesson-card { padding: 12px 13px 11px; min-height: 96px; border-radius: 13px; }
  .lesson-card .ltitle { font-size: 13px; line-height: 1.4; }
  .lesson-card .lnum { display: none; }
  .lesson-card .ltags { gap: 4px; }
  .ltag { font-size: 9.5px; padding: 1px 7px; }

  .badge-wall { padding: 15px 16px; margin-bottom: 26px; border-radius: 15px; }
  .badges { gap: 8px; }
  .badge-item { width: 62px; }
  .badge-item .bicon { width: 46px; height: 46px; font-size: 21px; border-radius: 13px; }
  .badge-item .bname { font-size: 10px; }

  .lesson-top { margin: 14px 0 14px; gap: 10px; }
  .lesson-h1 { font-size: 18.5px; }
  .back-btn { padding: 7px 13px; font-size: 13px; }
  .block { margin-bottom: 13px; }
  .block-text, .quiz-box, .widget-box { padding: 17px 16px; border-radius: 15px; }
  .block-text h3 { font-size: 15.5px; }
  .block-text table { display: block; overflow-x: auto; -webkit-overflow-scrolling: touch; white-space: nowrap; }
  .block-text th, .block-text td { padding: 8px 11px; font-size: 13px; }

  .quiz-opt { padding: 12px 14px; font-size: 14px; border-radius: 11px; }
  .quiz-opt:hover:not(:disabled) { transform: none; }
  .ctrl-row label { min-width: 70px; font-size: 13px; }
  .ctrl-row .val { min-width: 72px; }
  .result-grid { grid-template-columns: 1fr 1fr; gap: 8px; }
  .result-cell { padding: 10px 8px; }
  .result-cell .rval { font-size: 16.5px; }
  .vs-grid { grid-template-columns: 1fr; gap: 8px; }
  .vs-card { padding: 13px; display: flex; align-items: center; justify-content: space-between; text-align: left; flex-wrap: wrap; gap: 4px; }
  .vs-card .vs-title { margin-bottom: 0; }
  .vs-card .vs-note { width: 100%; }

  .sim-panel { padding: 13px; }
  .sim-btns .btn, .sim-panel .btn { padding: 13px 12px; font-size: 14.5px; }
  .pos-strip { gap: 9px 14px; font-size: 12.5px; padding: 9px 13px; }
  .ind-toggle { padding: 6px 13px; }
  .speed-ctrl button { width: 38px; height: 36px; }

  .lesson-done { padding: 20px 14px; border-radius: 15px; }
  .lesson-done .emoji { font-size: 38px; }

  #toastWrap { top: 56px; left: 12px; right: 12px; align-items: center; }
  .toast { max-width: 100%; padding: 10px 16px; font-size: 13.5px; }
  .modal { padding: 24px 20px; border-radius: 18px; }
}

@media (max-width: 360px) {
  .lesson-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 26px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}