/* ═══════════════ 檀光易学课程官网 · 共享样式 ═══════════════
   复刻 unleashingbest.com/about 的沉浸式极简编排 ·
   宣纸底 + 水墨字 + 朱砂单强调 · 生成式太极六十四卦门 · 章节滚动 · 跑马灯 · 音画 · 日夜双主题 */

:root{
  --paper:#f2eee4; --paper-2:#e9e4d6; --card:#ffffff;
  --ink:#1a1712; --ink-soft:#5b5347; --ink-faint:#8c8373;
  --line:rgba(26,23,18,.14); --line-soft:rgba(26,23,18,.08);
  --cinnabar:#c0392b; --cinnabar-deep:#9c2a1e; --cinnabar-bright:#d9503d; --gold:#a9843f;
  --foot-bg:#161310; --foot-ink:#f2eee4;
  --grain-blend:multiply; --grain-op:.05;
  --serif:"Noto Serif SC","Songti SC",serif;
  --latin:"Cormorant Garamond",serif;
  --sans:"Noto Sans SC","PingFang SC",sans-serif;
}
html.dark{
  --paper:#131110; --paper-2:#1b1815; --card:#1c1917;
  --ink:#ece7db; --ink-soft:#b7ae9d; --ink-faint:#847b6b;
  --line:rgba(236,231,219,.15); --line-soft:rgba(236,231,219,.07);
  --cinnabar:#dc5b47; --cinnabar-deep:#c0392b; --cinnabar-bright:#e97a68; --gold:#c9a05f;
  --foot-bg:#0c0a09; --foot-ink:#ece7db;
  --grain-blend:screen; --grain-op:.06;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--sans);background:var(--paper);color:var(--ink);
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;transition:background .6s ease,color .6s ease}
body:not(.entered).gate{overflow:hidden;height:100dvh}
::selection{background:var(--cinnabar);color:#fff5ef}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
.mono{font-family:var(--sans);letter-spacing:.34em;text-transform:uppercase;font-size:.66rem;font-weight:500;color:var(--ink-faint)}

/* 生成式主视觉：太极阴阳鱼 + 六十四卦环（AI 生图 · 双向旋转）+ 颗粒 */
#portal{position:fixed;inset:0;width:100%;height:100%;z-index:0;overflow:hidden;pointer-events:none;transition:opacity 1.1s ease}
body.entered #portal{opacity:.09}
.portal-stage{position:absolute;left:50%;top:39%;transform:translate(-50%,-50%);
  width:min(70vh,72vw);height:min(70vh,72vw);max-width:680px;max-height:680px}
.portal-glow{position:absolute;inset:-10%;border-radius:50%;
  background:radial-gradient(circle,rgba(192,57,43,.20),rgba(169,132,63,.08) 46%,transparent 64%);
  filter:blur(26px);animation:portalGlow 6.5s ease-in-out infinite}
.portal-ring,.portal-taiji{position:absolute;left:50%;top:50%;object-fit:contain;will-change:transform;
  filter:drop-shadow(0 12px 34px rgba(0,0,0,.22))}
.portal-ring{width:100%;height:100%;animation:portalSpin 48s linear infinite}
.portal-taiji{width:67%;height:67%;animation:portalSpinR 34s linear infinite}
html.dark .portal-ring,html.dark .portal-taiji{filter:drop-shadow(0 12px 40px rgba(0,0,0,.55))}
@keyframes portalSpin{from{transform:translate(-50%,-50%) rotate(0)}to{transform:translate(-50%,-50%) rotate(360deg)}}
@keyframes portalSpinR{from{transform:translate(-50%,-50%) rotate(0)}to{transform:translate(-50%,-50%) rotate(-360deg)}}
@keyframes portalGlow{0%,100%{opacity:.55;transform:scale(1)}50%{opacity:1;transform:scale(1.05)}}
@media(max-width:860px){.portal-stage{top:34%;width:min(52vh,86vw);height:min(52vh,86vw)}}
.grain{position:fixed;inset:-50%;z-index:1;pointer-events:none;opacity:var(--grain-op);mix-blend-mode:var(--grain-blend);
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='3'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E")}

/* 序幕 */
#splash{position:fixed;inset:0;z-index:20;display:flex;flex-direction:column;align-items:center;justify-content:flex-end;
  text-align:center;padding:2rem 2rem 15vh;background:radial-gradient(58% 42% at 50% 62%, transparent 26%, var(--paper) 66%);
  transition:opacity .9s ease,visibility .9s}
#splash.gone{opacity:0;visibility:hidden;pointer-events:none}
.splash-brand{position:absolute;top:2rem;left:0;right:0;display:flex;justify-content:center;gap:.7rem;align-items:center}
.splash-brand .brand-logo{height:92px;width:auto;filter:drop-shadow(0 4px 14px rgba(192,57,43,.18))}
@media(max-width:860px){.splash-brand .brand-logo{height:72px}}
.seal{width:30px;height:30px;border:1.5px solid var(--cinnabar);color:var(--cinnabar);border-radius:5px;display:grid;place-items:center;font-family:var(--serif);font-weight:700;font-size:.9rem}
.splash-brand b{font-family:var(--serif);letter-spacing:.32em;font-weight:700;font-size:.95rem}
.splash-copy{position:relative;max-width:32ch;font-family:var(--serif);font-size:clamp(1.02rem,2.3vw,1.42rem);line-height:2.1;margin-bottom:2.2rem;
  text-shadow:0 0 10px var(--paper),0 0 22px var(--paper),0 0 38px var(--paper)}
.splash-copy::before{content:"";position:absolute;inset:-3rem -5rem;z-index:-1;pointer-events:none;
  background:radial-gradient(ellipse 62% 58% at 50% 50%, var(--paper) 36%, rgba(0,0,0,0) 78%);
  filter:blur(4px)}
.splash-copy em{font-style:normal;color:var(--cinnabar);font-weight:700}
.splash-copy .big{display:block;font-size:clamp(2rem,6vw,3.6rem);font-weight:900;letter-spacing:.2em;text-indent:.2em;margin-bottom:1rem;line-height:1.2}

/* 药丸按钮 */
.pill{position:relative;display:inline-flex;align-items:center;gap:.6rem;border:1px solid var(--ink);border-radius:999px;
  padding:1rem 2.4rem;cursor:pointer;background:transparent;color:var(--ink);overflow:hidden;transition:color .35s,background .35s,border-color .35s;font-family:var(--sans)}
.pill .roll{position:relative;height:.72rem;line-height:.72rem;overflow:hidden;display:inline-block}
.pill .roll span{display:block;height:.72rem;line-height:.72rem;font-size:.72rem;letter-spacing:.28em;text-transform:uppercase;font-weight:700;transition:transform .4s cubic-bezier(.7,0,.2,1)}
.pill:hover .roll span{transform:translateY(-.72rem)}
.pill:hover{background:var(--ink);color:var(--paper);border-color:var(--ink)}
.pill.solid{background:var(--cinnabar);border-color:var(--cinnabar);color:#fff5ef}
.pill.solid:hover{background:var(--cinnabar-deep);border-color:var(--cinnabar-deep)}
.pill .arw{font-size:.8rem;transition:transform .35s}
.pill:hover .arw{transform:translateX(4px)}

.splash-foot{position:absolute;left:0;right:0;bottom:1.7rem;display:flex;justify-content:space-between;align-items:center;padding:0 1.8rem}
.chapters-trigger{background:none;border:0;cursor:pointer;color:var(--ink-faint);display:inline-flex;gap:.5rem;align-items:center}
.chapters-trigger:hover{color:var(--cinnabar)}
.audio-note{display:flex;align-items:center;gap:.9rem;color:var(--ink-faint);font-size:.68rem;letter-spacing:.05em}
.wave{display:flex;align-items:flex-end;gap:2px;width:22px;height:16px;cursor:pointer}
.wave i{flex:1;background:var(--ink-faint);height:30%;border-radius:2px}
.wave.on i{background:var(--cinnabar);animation:eq .9s ease-in-out infinite}
.wave.on i:nth-child(2){animation-delay:.15s}.wave.on i:nth-child(3){animation-delay:.3s}.wave.on i:nth-child(4){animation-delay:.45s}
@keyframes eq{0%,100%{height:25%}50%{height:100%}}

/* 悬浮工具（主题 + 声音） */
.dock{position:fixed;top:1.4rem;right:1.4rem;z-index:15;display:flex;gap:.6rem;opacity:0;transform:translateY(-8px);transition:opacity .6s ease,transform .6s ease}
body.entered .dock,body.page .dock{opacity:1;transform:none}
.dock button{width:40px;height:40px;border-radius:999px;border:1px solid var(--line);background:var(--paper-2);color:var(--ink);cursor:pointer;
  display:grid;place-items:center;font-size:1rem;transition:background .25s,border-color .25s,color .25s}
.dock button:hover{border-color:var(--cinnabar);color:var(--cinnabar)}

/* 正文容器 */
main{position:relative;z-index:5}
main.gated{opacity:0;pointer-events:none;transition:opacity 1s ease .15s}
body.entered main.gated{opacity:1;pointer-events:auto}
.wrap{max-width:1180px;margin:0 auto;padding:0 2rem}
section{position:relative}
.label{display:inline-flex;align-items:center;gap:.7rem;margin-bottom:2.2rem}
.label::before{content:"";width:34px;height:1px;background:var(--cinnabar)}

/* 巨型堆叠标题 */
.stack{list-style:none}
.stack li{font-family:var(--serif);font-weight:900;font-size:clamp(3rem,11vw,9rem);line-height:.96;letter-spacing:.04em;color:var(--ink);overflow:hidden}
.stack li .rise{display:block;transform:translateY(105%);transition:transform 1s cubic-bezier(.16,1,.3,1)}
.stack li em{font-style:normal;color:var(--cinnabar)}
.in .stack li .rise{transform:none}
.stack li:nth-child(2) .rise{transition-delay:.08s}.stack li:nth-child(3) .rise{transition-delay:.16s}

.reveal{opacity:0;transform:translateY(26px);transition:opacity .9s ease,transform .9s cubic-bezier(.16,1,.3,1)}
.in .reveal,.reveal.in{opacity:1;transform:none}

/* 品牌大标题区 */
.hero-banner{min-height:92vh;display:flex;flex-direction:column;justify-content:center;padding-top:8vh;padding-bottom:6vh}
.hero-banner .sub{font-family:var(--serif);font-size:clamp(1rem,2vw,1.35rem);color:var(--ink-soft);margin-top:2rem;letter-spacing:.1em;line-height:2}
.hero-banner .sub em{color:var(--cinnabar);font-style:normal}
.scroll-cue{margin-top:3.5rem;display:flex;align-items:center;gap:.8rem;color:var(--ink-faint);font-size:.7rem;letter-spacing:.24em;text-transform:uppercase}
.scroll-cue .dot{width:22px;height:36px;border:1px solid var(--line);border-radius:12px;position:relative}
.scroll-cue .dot::after{content:"";position:absolute;left:50%;top:7px;width:3px;height:7px;border-radius:2px;background:var(--cinnabar);transform:translateX(-50%);animation:sc 1.7s ease-in-out infinite}
@keyframes sc{0%{opacity:0;transform:translate(-50%,0)}30%{opacity:1}100%{opacity:0;transform:translate(-50%,12px)}}

/* 首屏 · 进群二维码卡（浮于右侧，甘老师指定位置） */
.hero-qr{position:absolute;right:2.4rem;top:50%;transform:translateY(-50%);z-index:6;
  display:flex;align-items:center;gap:1rem;padding:1rem 1.2rem 1rem 1rem;max-width:290px;
  background:var(--card);border:1px solid var(--line);border-radius:16px;
  box-shadow:0 30px 70px -34px rgba(0,0,0,.55),0 2px 10px rgba(0,0,0,.06);
  transition:transform .4s cubic-bezier(.16,1,.3,1),box-shadow .4s,border-color .3s;backdrop-filter:blur(4px)}
.hero-qr::before{content:"";position:absolute;left:1rem;right:1rem;top:0;height:2px;border-radius:2px;
  background:linear-gradient(90deg,transparent,var(--cinnabar),transparent)}
.hero-qr:hover{transform:translateY(-50%) scale(1.03);border-color:var(--cinnabar);
  box-shadow:0 40px 90px -34px rgba(0,0,0,.6),0 0 0 1px var(--cinnabar)}
.hero-qr-frame{flex:0 0 auto;width:92px;height:92px;border-radius:10px;overflow:hidden;border:1px solid var(--line);background:#fff;padding:4px}
.hero-qr-frame img{width:100%;height:100%;object-fit:contain;border-radius:6px}
.hero-qr-txt{min-width:0}
.hero-qr-txt b{display:block;font-family:var(--serif);font-size:1.02rem;letter-spacing:.06em;color:var(--ink);margin-bottom:.4rem}
.hero-qr-txt span{font-size:.74rem;line-height:1.7;color:var(--ink-soft)}
@media(max-width:1080px){
  .hero-qr{right:1.2rem;max-width:250px;padding:.85rem 1rem}
  .hero-qr-frame{width:78px;height:78px}
}

/* 引言 */
.intro{padding-top:9rem;padding-bottom:9rem;border-top:1px solid var(--line-soft)}
.intro-grid{display:grid;grid-template-columns:1fr 1fr;gap:5rem}
.intro-lead{font-family:var(--serif);font-size:clamp(1.5rem,3.2vw,2.4rem);line-height:1.7;font-weight:600}
.intro-lead em{color:var(--cinnabar);font-style:normal}
.intro-body{font-size:1rem;line-height:2.05;color:var(--ink-soft)}
.intro-body p+p{margin-top:1.3rem}
.quote{margin-top:9rem;text-align:center;font-family:var(--latin);font-style:italic;font-size:clamp(1.6rem,4vw,2.8rem);line-height:1.5;color:var(--ink)}
.quote .zh{font-family:var(--serif);font-style:normal;display:block;margin-top:1rem;font-size:.5em;color:var(--ink-soft);letter-spacing:.12em}

/* 三大支柱 */
.pillars{display:grid;grid-template-columns:repeat(3,1fr);margin-top:6rem;border-top:1px solid var(--line)}
.pillar{padding:2.6rem 2rem 2.6rem 0;border-right:1px solid var(--line-soft)}
.pillar:last-child{border-right:0}
.pillar .n{font-family:var(--latin);font-size:2.4rem;color:var(--cinnabar);line-height:1}
.pillar h4{font-family:var(--serif);font-size:1.25rem;margin:1rem 0 .8rem;letter-spacing:.06em}
.pillar p{font-size:.9rem;line-height:1.85;color:var(--ink-soft)}

/* 课程区 */
.courses{padding-top:8rem;padding-bottom:8rem}
.course{display:grid;grid-template-columns:.9fr 1.1fr;gap:4.5rem;align-items:center;padding:5rem 0;border-top:1px solid var(--line)}
.course:nth-child(even) .course-media{order:2}
.course-media{position:relative}
.course-media .frame{border-radius:10px;overflow:hidden;border:1px solid var(--line);box-shadow:0 40px 80px -40px rgba(0,0,0,.5);background:var(--card)}
.course-media img{width:100%;height:auto;transition:transform 1.4s cubic-bezier(.16,1,.3,1)}
.course-media:hover img{transform:scale(1.04)}
.course-media .tag{position:absolute;top:-14px;left:-14px;background:var(--cinnabar);color:#fff5ef;font-size:.68rem;letter-spacing:.16em;padding:.5rem .95rem;border-radius:6px;font-weight:700}
.course-info .kicker{color:var(--cinnabar);letter-spacing:.28em;text-transform:uppercase;font-size:.68rem;font-weight:700;margin-bottom:1.1rem}
.course-info h3{font-family:var(--serif);font-weight:900;font-size:clamp(2rem,4.4vw,3.1rem);line-height:1.12;letter-spacing:.03em;margin-bottom:1.4rem}
.course-info h3 em{color:var(--cinnabar);font-style:normal}
.course-info .desc{font-size:1rem;line-height:1.95;color:var(--ink-soft);margin-bottom:1.8rem;max-width:44ch}
.facts{display:flex;flex-wrap:wrap;gap:.6rem;margin-bottom:2rem}
.facts span{border:1px solid var(--line);border-radius:999px;padding:.42rem .95rem;font-size:.78rem;color:var(--ink-soft)}
.facts b{color:var(--cinnabar);font-weight:700}
.toc{columns:2;column-gap:2.2rem;margin:1.5rem 0 2rem;padding:1.5rem 0;border-top:1px dashed var(--line);border-bottom:1px dashed var(--line)}
.toc li{list-style:none;font-size:.85rem;line-height:2.15;color:var(--ink-soft);break-inside:avoid}
.toc li i{color:var(--cinnabar);font-style:normal;font-family:var(--latin);margin-right:.5rem}
.course-actions{display:flex;gap:.9rem;flex-wrap:wrap;align-items:center}

/* 学习之道 */
.notes{padding-top:8rem;padding-bottom:8rem;border-top:1px solid var(--line)}
.marquee{overflow:hidden;white-space:nowrap;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:1.1rem 0;margin:3rem 0 5rem}
.marquee .track{display:inline-block;animation:mq 26s linear infinite}
.marquee .track span{font-family:var(--serif);font-size:1.5rem;font-weight:700;margin:0 1.4rem;color:var(--ink)}
.marquee .track span em{color:var(--cinnabar);font-style:normal}
@keyframes mq{from{transform:translateX(0)}to{transform:translateX(-50%)}}
.note-list{display:grid;grid-template-columns:1fr 1fr;gap:3.5rem 5rem}
.note{display:flex;gap:1.6rem}
.note .num{font-family:var(--latin);font-size:2.6rem;color:var(--cinnabar);line-height:1;min-width:2.2ch}
.note h4{font-family:var(--serif);font-size:1.35rem;margin-bottom:.8rem;letter-spacing:.04em}
.note p{font-size:.92rem;line-height:1.9;color:var(--ink-soft)}

/* 页脚 */
footer{background:var(--foot-bg);color:var(--foot-ink);padding:6rem 0 3rem;position:relative;z-index:5}
.foot-marquee{overflow:hidden;white-space:nowrap;border-bottom:1px solid rgba(242,238,228,.14);padding-bottom:2.5rem;margin-bottom:4rem}
.foot-marquee .track{display:inline-block;animation:mq 30s linear infinite}
.foot-marquee .track span{font-family:var(--serif);font-weight:900;font-size:clamp(2.4rem,7vw,5rem);margin:0 1.5rem;color:transparent;-webkit-text-stroke:1px rgba(242,238,228,.55)}
.foot-marquee .track span.fill{color:var(--foot-ink);-webkit-text-stroke:0}
.foot-cta{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:flex-end;gap:2rem}
.foot-cta h3{font-family:var(--serif);font-size:clamp(1.8rem,4vw,2.8rem);font-weight:700;line-height:1.3}
.foot-cta h3 em{color:#e0917f;font-style:normal}
.foot-meta{display:flex;justify-content:space-between;flex-wrap:wrap;gap:1rem;margin-top:5rem;padding-top:2rem;border-top:1px solid rgba(242,238,228,.14);font-size:.74rem;color:var(--ink-faint)}
.foot-meta .compliance{color:rgba(242,238,228,.5)}

/* 报名二维码弹窗 */
.modal{position:fixed;inset:0;z-index:60;display:none;place-items:center;padding:2rem;
  background:rgba(10,9,7,.72);backdrop-filter:blur(6px)}
.modal.on{display:grid;animation:fade .3s ease}
@keyframes fade{from{opacity:0}to{opacity:1}}
.modal-card{background:var(--paper);border:1px solid var(--line);border-radius:16px;max-width:420px;width:100%;
  padding:2.4rem 2.4rem 2rem;text-align:center;position:relative;box-shadow:0 40px 100px -30px rgba(0,0,0,.6)}
.modal-card .close{position:absolute;top:1rem;right:1.1rem;background:none;border:0;font-size:1.4rem;color:var(--ink-faint);cursor:pointer}
.modal-card .k{color:var(--cinnabar);letter-spacing:.28em;text-transform:uppercase;font-size:.66rem;font-weight:700}
.modal-card h4{font-family:var(--serif);font-size:1.5rem;margin:.7rem 0 1.4rem}
.modal-card .qr{width:230px;height:auto;margin:0 auto;border-radius:10px;border:1px solid var(--line)}
.modal-card p{font-size:.86rem;color:var(--ink-soft);margin-top:1.2rem;line-height:1.7}
.modal-card .note-mini{font-size:.72rem;color:var(--ink-faint);margin-top:.8rem}

/* ————— 课程详情页 ————— */
.page-nav{position:sticky;top:0;z-index:12;display:flex;align-items:center;justify-content:space-between;
  padding:1rem 2rem;background:linear-gradient(180deg,var(--paper),rgba(0,0,0,0));backdrop-filter:blur(10px)}
.page-nav .brand{display:flex;gap:.6rem;align-items:center}
.page-nav .brand b{font-family:var(--serif);letter-spacing:.28em;font-weight:700;font-size:.9rem}
.page-nav .back{font-size:.8rem;color:var(--ink-soft);display:inline-flex;gap:.5rem;align-items:center}
.page-nav .back:hover{color:var(--cinnabar)}
.detail-hero{display:grid;grid-template-columns:1fr 1fr;gap:4.5rem;align-items:center;padding-top:4rem;padding-bottom:5rem}
.detail-hero .poster{border-radius:12px;overflow:hidden;border:1px solid var(--line);box-shadow:0 40px 90px -40px rgba(0,0,0,.55);background:var(--card);width:fit-content;max-width:100%;margin:0 auto}
.detail-hero .poster img{display:block;width:auto;max-width:100%;max-height:78vh;margin:0 auto}
.detail-hero .kicker{color:var(--cinnabar);letter-spacing:.28em;text-transform:uppercase;font-size:.7rem;font-weight:700;margin-bottom:1.2rem}
.detail-hero h1{font-family:var(--serif);font-weight:900;font-size:clamp(2.4rem,6vw,4.2rem);line-height:1.08;letter-spacing:.03em;margin-bottom:1.6rem}
.detail-hero h1 em{color:var(--cinnabar);font-style:normal}
.detail-hero .lead{font-size:1.05rem;line-height:1.95;color:var(--ink-soft);margin-bottom:2rem;max-width:46ch}
.price{display:flex;align-items:baseline;gap:.8rem;margin-bottom:2rem}
.price .now{font-family:var(--latin);font-size:2.6rem;color:var(--cinnabar);font-weight:600}
.price .now b{font-size:1.3rem}
.price .tagline{font-size:.8rem;color:var(--ink-faint)}
.detail-sec{padding-top:5rem;padding-bottom:5rem;border-top:1px solid var(--line)}
.detail-sec h2{font-family:var(--serif);font-size:clamp(1.6rem,3.4vw,2.4rem);margin-bottom:2.5rem;letter-spacing:.04em}
.detail-sec h2 em{color:var(--cinnabar);font-style:normal}
.gains{display:grid;grid-template-columns:repeat(2,1fr);gap:1.6rem}
.gain{display:flex;gap:1rem;padding:1.4rem 1.6rem;border:1px solid var(--line);border-radius:12px;background:var(--paper-2)}
.gain .i{color:var(--cinnabar);font-family:var(--latin);font-size:1.5rem;line-height:1}
.gain p{font-size:.94rem;line-height:1.75;color:var(--ink-soft)}
.gain b{color:var(--ink);font-weight:600}
.outline{columns:2;column-gap:3rem}
.outline li{list-style:none;font-size:.95rem;line-height:2.3;color:var(--ink-soft);break-inside:avoid;border-bottom:1px dashed var(--line-soft)}
.outline li i{font-family:var(--latin);color:var(--cinnabar);margin-right:.7rem}
.enroll{text-align:center;padding-top:6rem;padding-bottom:6rem}
.enroll .qr{width:220px;border-radius:12px;border:1px solid var(--line);margin:1.8rem auto 0}
.sec-lead{font-size:1rem;line-height:1.95;color:var(--ink-soft);max-width:60ch;margin:-1.4rem 0 2.6rem}
.sec-lead em{color:var(--cinnabar);font-style:normal}

/* 五官详解（借鉴学习图鉴内容） */
.features{display:flex;flex-direction:column;gap:1.4rem}
.feature{display:grid;grid-template-columns:auto 1fr;gap:1.7rem;align-items:start;
  padding:1.9rem 2rem;border:1px solid var(--line);border-radius:14px;background:var(--paper-2);
  transition:border-color .3s,transform .3s,box-shadow .3s}
.feature:hover{border-color:var(--cinnabar);transform:translateY(-2px);box-shadow:0 24px 60px -34px rgba(0,0,0,.5)}
.feature .zi{font-family:var(--serif);font-weight:900;font-size:2.9rem;line-height:1;color:var(--cinnabar);
  width:1.5em;text-align:center;border-right:1px solid var(--line);padding-right:.3em}
.feature .fbody .cap{color:var(--cinnabar);font-size:.68rem;letter-spacing:.22em;text-transform:uppercase;font-weight:700;margin-bottom:.9rem}
.feature .fbody ul{list-style:none}
.feature .fbody li{position:relative;padding-left:1.15rem;font-size:.93rem;line-height:1.85;color:var(--ink-soft)}
.feature .fbody li+li{margin-top:.55rem}
.feature .fbody li::before{content:"";position:absolute;left:0;top:.72em;width:5px;height:5px;border-radius:50%;background:var(--cinnabar)}
.feature .fbody li b{color:var(--ink);font-weight:600}
@media(max-width:860px){
  .feature{grid-template-columns:1fr;gap:1rem;padding:1.5rem 1.4rem}
  .feature .zi{border-right:0;text-align:left;width:auto;padding-right:0}
}

@media(max-width:860px){
  .wrap{padding:0 1.7rem}
  .intro-grid{grid-template-columns:1fr;gap:2.2rem}
  .intro{padding-top:5.5rem;padding-bottom:5.5rem}
  .quote{margin-top:5rem}
  .pillars{grid-template-columns:1fr}
  .pillar{border-right:0;border-bottom:1px solid var(--line-soft);padding:1.8rem 0}
  .courses{padding-top:4.5rem;padding-bottom:4.5rem}
  .course{grid-template-columns:1fr;gap:2rem;padding:3.2rem 0}
  .course-media .tag{left:0;top:-12px}
  .course:nth-child(even) .course-media{order:0}
  .toc{columns:1}
  .note-list{grid-template-columns:1fr;gap:2.2rem}
  .splash-foot{padding:0 1.1rem;flex-direction:column;gap:.9rem}
  .splash-copy .big{font-size:2.2rem}
  .dock{top:auto;bottom:1.1rem;right:1.1rem}
  .hero-banner{min-height:86vh}
  .hero-qr{position:static;transform:none;margin-top:2.4rem;max-width:none;width:100%}
  .hero-qr:hover{transform:none}
  .detail-hero{grid-template-columns:1fr;gap:2.2rem;padding-top:2rem;padding-bottom:3rem}
  .detail-hero .poster{max-width:340px}
  .gains{grid-template-columns:1fr}
  .outline{columns:1}
  .foot-cta{flex-direction:column;align-items:flex-start}
  .page-nav{padding:.8rem 1.3rem}
}
@media(prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .stack li .rise,.reveal{transform:none;opacity:1}
}