@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+SC:wght@500;600;700;900&family=IBM+Plex+Mono:wght@400;500;600&display=swap');
:root{--paper:#f2eee4;--deep:#e8e0d1;--ink:#1e2525;--muted:#65706c;--line:#cfc6b7;--red:#d54a2c;--blue:#215f75;--green:#3d694f;--white:#fffdf7;--serif:"Noto Serif SC","Songti SC",serif;--sans:"Avenir Next","PingFang SC",sans-serif;--mono:"IBM Plex Mono","SFMono-Regular",monospace;--shadow:0 18px 50px rgba(41,37,28,.1)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);line-height:1.7;-webkit-font-smoothing:antialiased}.paper-grid{position:fixed;inset:0;pointer-events:none;opacity:.32;background-image:linear-gradient(rgba(30,37,37,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(30,37,37,.035) 1px,transparent 1px);background-size:28px 28px;mask-image:linear-gradient(#000,transparent 88%);z-index:-1}.skip-link{position:fixed;top:8px;left:8px;transform:translateY(-160%);background:var(--ink);color:#fff;padding:8px 12px;z-index:99}.skip-link:focus{transform:none}.site-nav,.lesson-nav{max-width:1180px;margin:auto;padding:24px 28px;display:flex;justify-content:space-between;gap:24px;border-bottom:1px solid var(--line);font:600 12px var(--mono)}.site-nav a,.lesson-nav a{color:var(--ink);text-decoration:none}.site-nav div{display:flex;gap:26px}.site-nav div a{color:var(--muted)}main{max-width:1180px;margin:auto;padding:0 28px}.course-hero{min-height:630px;padding:92px 0 72px;display:grid;grid-template-columns:1.25fr .75fr;gap:70px;align-items:center}.issue-line{display:flex;align-items:center;gap:12px;font:600 11px var(--mono);letter-spacing:.14em;color:var(--red)}.issue-line i{height:1px;width:66px;background:var(--red)}h1,h2,h3,p{margin-top:0}.course-hero h1{font:900 clamp(64px,8vw,112px)/.93 var(--serif);letter-spacing:-.055em;margin:25px 0 30px}.course-hero h1 em,.lesson-hero h1 em{font-style:normal;color:var(--red)}.course-hero p{font-size:18px;max-width:610px;color:var(--muted)}.hero-actions{display:flex;gap:12px;margin-top:34px}.button{padding:13px 20px;border:1px solid var(--ink);text-decoration:none;color:var(--ink);font-weight:700}.button.primary{background:var(--ink);color:var(--white)}.hero-manifesto{position:relative;min-height:390px;padding:34px;background:var(--blue);color:var(--white);box-shadow:16px 16px 0 var(--ink);overflow:hidden}.hero-manifesto:before{content:"";position:absolute;width:260px;height:260px;border:1px solid #ffffff2e;border-radius:50%;right:-70px;top:-70px}.manifesto-number{display:block;font:500 118px/.85 var(--mono);letter-spacing:-.1em}.manifesto-unit{font:600 11px var(--mono);letter-spacing:.22em}.hero-manifesto blockquote{font:600 21px/1.8 var(--serif);margin:35px 0;border-left:3px solid #f0ad84;padding-left:20px}.manifesto-meta{display:flex;gap:18px;flex-wrap:wrap;font:500 10px var(--mono);opacity:.72}.today-section,.week-section,.roadmap-section,.archive-section,.library-section{padding:72px 0;border-top:1px solid var(--line)}.section-label,.section-head{display:flex;justify-content:space-between;gap:20px;align-items:end;margin-bottom:28px}.section-label{font:600 11px var(--mono)}.section-label span,.section-no{color:var(--red)}.section-head h2{font:700 clamp(28px,4vw,44px)/1.2 var(--serif);margin:6px 0 0;letter-spacing:-.03em}.section-head p{color:var(--muted);max-width:330px}.section-no{font:600 10px var(--mono);letter-spacing:.15em}.today-card{display:grid;grid-template-columns:110px minmax(0,1fr) 260px;background:var(--white);border:1px solid var(--ink);box-shadow:var(--shadow)}.today-index{padding:30px 22px;border-right:1px solid var(--line);font-family:var(--mono)}.today-index span{font-size:11px;color:var(--red)}.today-index b{display:block;font-size:58px;line-height:1;margin-top:42px}.today-index small{color:var(--muted)}.today-copy{padding:42px 46px}.lesson-meta{display:flex;gap:8px}.lesson-meta span{font:600 10px var(--mono);padding:4px 9px;border:1px solid var(--line)}.today-copy h2{font:700 clamp(30px,4.3vw,53px)/1.13 var(--serif);letter-spacing:-.035em;margin:24px 0 18px}.today-copy>p{color:var(--muted)}.outcome{display:grid;grid-template-columns:115px 1fr;gap:18px;padding:17px 0;margin:22px 0;border-block:1px solid var(--line);font-size:14px}.outcome b{color:var(--red)}.read-link{color:var(--ink);font-weight:800;text-decoration:none}.read-link span{color:var(--red)}.today-diagram{background:var(--deep);border-left:1px solid var(--line);display:flex;flex-direction:column;align-items:center;justify-content:center;padding:24px;gap:9px;font:500 9px var(--mono);color:var(--muted)}.model-orb,.schema-gate,.data-cube{width:116px;height:78px;display:flex;flex-direction:column;align-items:center;justify-content:center;font:700 16px var(--mono)}.model-orb{border-radius:50%;background:var(--ink);color:#fff}.schema-gate{border:2px dashed var(--red);color:var(--red)}.data-cube{background:var(--green);color:#fff;clip-path:polygon(12% 0,100% 0,88% 100%,0 100%)}.today-diagram small{font-size:9px;font-weight:400}.week-plan{display:grid;grid-template-columns:repeat(7,1fr);border:1px solid var(--line)}.day{min-height:170px;padding:20px 16px;border-right:1px solid var(--line);display:flex;flex-direction:column;text-decoration:none;color:var(--ink);background:#fffdf76b}.day span{font:600 9px var(--mono);color:var(--muted)}.day b{font:600 14px/1.55 var(--serif);margin-top:18px}.day small{margin-top:auto;color:var(--muted)}.day.today{background:var(--red);color:#fff;transform:translateY(-8px);box-shadow:0 10px 25px #d54a2c40}.day.today span,.day.today small{color:#fff}.day.locked{opacity:.56}.phase-strip,.weeks-grid{display:grid;grid-template-columns:repeat(3,1fr)}.phase{padding:24px 26px;border-left:4px solid var(--line)}.phase.active{border-color:var(--red);background:#fffdf78c}.phase span,.week-top{font:600 10px var(--mono);color:var(--muted)}.phase h3{font:700 27px var(--serif);margin:7px 0}.phase p,.week-card p{font-size:13px;color:var(--muted)}.weeks-grid{gap:12px;margin-top:26px}.week-card{padding:22px;border:1px solid var(--line);background:#fffdf773;min-height:190px}.week-card.current{border-color:var(--ink);box-shadow:6px 6px 0 var(--red)}.week-top{display:flex;justify-content:space-between}.week-card h3{font:700 18px/1.4 var(--serif);margin:24px 0 10px}.week-card small{color:var(--green);font-weight:700}.archive-tools{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:18px}.filter{border:1px solid var(--line);background:transparent;padding:8px 13px;font:600 11px var(--mono);cursor:pointer}.filter.active,.filter:hover{background:var(--ink);color:#fff}.lesson-list,.knowledge-list{border-top:1px solid var(--ink)}.archive-row{display:grid;grid-template-columns:90px 110px 1fr 90px;gap:15px;padding:20px 10px;border-bottom:1px solid var(--line);text-decoration:none;color:var(--ink);align-items:center}.archive-row:hover{background:var(--white)}.archive-row time,.archive-row span,.archive-row i{font:500 11px var(--mono)}.archive-row span{color:var(--red)}.archive-row i{text-align:right;color:var(--muted);font-style:normal}.library-section{display:grid;grid-template-columns:.85fr 1.15fr;gap:70px}.library-intro h2{font:700 39px/1.3 var(--serif);margin:14px 0 20px}.library-intro p{color:var(--muted)}.knowledge-link{display:grid;grid-template-columns:50px 1fr 30px;align-items:center;padding:16px 4px;border-bottom:1px solid var(--line);text-decoration:none;color:var(--ink)}.knowledge-link span{font:500 11px var(--mono);color:var(--muted)}.knowledge-link b{font:600 16px var(--serif)}footer{max-width:1180px;margin:auto;padding:34px 28px 70px;border-top:1px solid var(--ink);display:grid;grid-template-columns:1fr 2fr auto;gap:25px;font-size:13px}footer p{color:var(--muted)}footer a{color:var(--red)}.empty{padding:24px;color:var(--muted)}
/* 每日详情 */.lesson-page{background:var(--white)}.lesson-shell{max-width:1060px}.lesson-hero{padding:90px 0 54px;border-bottom:1px solid var(--ink)}.eyebrow,.section-kicker{font:600 10px var(--mono);color:var(--red);letter-spacing:.12em}.lesson-hero h1{font:900 clamp(48px,7vw,84px)/1.05 var(--serif);letter-spacing:-.05em;margin:22px 0}.lesson-deck{font:500 20px/1.8 var(--serif);max-width:800px;color:var(--muted)}.learn-contract{display:grid;grid-template-columns:140px 1fr;gap:25px;padding:20px 0;margin-top:34px;border-top:1px solid var(--line)}.learn-contract span{color:var(--red);font-weight:800}.lesson-toc{position:sticky;top:0;background:#fffdf7f0;backdrop-filter:blur(12px);z-index:5;display:flex;gap:22px;padding:14px 0;border-bottom:1px solid var(--line);overflow:auto;white-space:nowrap}.lesson-toc span,.lesson-toc a{font:600 10px var(--mono)}.lesson-toc span{color:var(--red)}.lesson-toc a{color:var(--muted);text-decoration:none}.lesson-body{max-width:760px;margin:auto;padding:40px 0 80px}.lesson-body section{padding:48px 0;border-bottom:1px solid var(--line);scroll-margin-top:70px}.lesson-body h2{font:700 34px/1.3 var(--serif)}.lesson-body h3{font:700 18px var(--serif);margin-top:30px}.concept-stack,.two-col{display:grid;grid-template-columns:repeat(3,1fr);margin:28px 0}.concept-stack div,.two-col>div{padding:20px;border:1px solid var(--line)}.concept-stack b,.concept-stack span{display:block}.concept-stack span{font-size:12px;color:var(--muted)}.callout{padding:20px 24px;background:var(--paper);border-left:4px solid var(--red)}pre{overflow:auto;background:#202727;color:#f6f1e7;padding:26px;font:13px/1.8 var(--mono);box-shadow:8px 8px 0 var(--deep)}.two-col{grid-template-columns:1fr 1fr;gap:18px}.two-col>div{background:var(--paper)}.flow{display:flex;align-items:center;gap:9px;padding:24px 10px;margin:24px -40px;background:var(--paper);overflow:auto}.flow span{padding:8px 10px;border:1px solid var(--ink);font:600 10px var(--mono);white-space:nowrap}.flow i{color:var(--red)}.pitfalls li,.practice-list li{padding:10px 0}.interview-card{background:var(--blue);color:#fff;margin:40px -46px 0;padding:48px 46px!important;border:0!important}.interview-card .section-kicker{color:#f0ad84}.interview-card blockquote{margin:20px 0;padding:20px 25px;border-left:3px solid #f0ad84;background:#ffffff12;font:500 17px/1.9 var(--serif)}details{border-top:1px solid var(--line);padding:16px 0}summary{cursor:pointer;font-weight:800}.sources a{display:block;color:var(--blue);padding:9px 0}.lesson-next{display:grid;gap:4px;background:var(--paper);padding:28px 34px;margin-bottom:80px}.lesson-next span,.lesson-next small{font:500 10px var(--mono);color:var(--muted)}.lesson-next strong{font:700 20px var(--serif)}
@media(max-width:900px){.course-hero{grid-template-columns:1fr}.today-card{grid-template-columns:82px 1fr}.today-diagram{display:none}.week-plan{grid-template-columns:repeat(2,1fr)}.weeks-grid{grid-template-columns:repeat(2,1fr)}.library-section{grid-template-columns:1fr}}
@media(max-width:620px){.site-nav{padding:18px}.site-nav div{display:none}main{padding:0 18px}.course-hero{padding:60px 0}.course-hero h1{font-size:59px}.hero-actions{flex-direction:column;text-align:center}.hero-manifesto{box-shadow:8px 8px 0 var(--ink)}.section-label,.section-head{align-items:start;flex-direction:column}.today-card{display:block}.today-index{display:flex;gap:8px;align-items:baseline;border:0;border-bottom:1px solid var(--line);padding:18px}.today-index b{font-size:32px;margin:0 0 0 auto}.today-copy{padding:27px 22px}.today-copy h2{font-size:31px}.outcome{grid-template-columns:1fr}.week-plan{display:block}.day{min-height:auto;border:0;border-bottom:1px solid var(--line)}.day b{margin:8px 0}.day.today{transform:none}.phase-strip,.weeks-grid{grid-template-columns:1fr}.archive-row{grid-template-columns:58px 1fr 65px}.archive-row span{display:none}.library-intro h2{font-size:31px}footer{grid-template-columns:1fr;padding-inline:18px}.lesson-nav{padding:18px}.lesson-nav span{display:none}.lesson-hero{padding:58px 0 36px}.lesson-hero h1{font-size:44px}.learn-contract,.concept-stack,.two-col{grid-template-columns:1fr}.lesson-toc{margin:0 -18px;padding-inline:18px}.lesson-body h2{font-size:28px}.flow{margin:20px 0}.interview-card{margin:30px -18px 0;padding:38px 18px!important}pre{margin-inline:-18px;box-shadow:none}}
@media(prefers-reduced-motion:no-preference){.course-hero>*{animation:rise .7s both}.course-hero>:last-child{animation-delay:.12s}.today-card{animation:rise .7s .2s both}@keyframes rise{from{opacity:0;transform:translateY(18px)}to{opacity:1;transform:none}}}
/* 简洁列表首页 */
.course-index{background:var(--white)}.course-index main{max-width:1180px}.simple-hero{position:relative;height:min(660px,72vh);min-height:520px;margin-top:28px;overflow:hidden;background:#172021}.simple-hero>img{width:100%;height:100%;object-fit:cover}.simple-hero:after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(14,19,20,.92),rgba(14,19,20,.62) 42%,rgba(14,19,20,.06) 74%)}.hero-overlay{position:absolute;z-index:1;left:7%;top:50%;transform:translateY(-50%);color:#fff;width:min(520px,82%)}.hero-overlay>span,.simple-head span{font:600 10px var(--mono);letter-spacing:.15em;color:#ef9b78}.hero-overlay h1{font:800 clamp(46px,6vw,76px)/1.12 var(--serif);letter-spacing:-.045em;margin:17px 0}.hero-overlay p{font-size:17px;color:#e3ded4;max-width:470px}.hero-overlay a{display:inline-block;margin-top:20px;padding:11px 18px;background:var(--red);color:#fff;text-decoration:none;font-weight:700}.promise-bar{display:grid;grid-template-columns:repeat(3,1fr);border:1px solid var(--line);border-top:0}.promise-bar div{padding:22px 28px;border-right:1px solid var(--line)}.promise-bar div:last-child{border:0}.promise-bar b,.promise-bar span{display:block}.promise-bar b{font:700 19px var(--serif)}.promise-bar span{font-size:12px;color:var(--muted)}.simple-section{padding:76px 0;border-bottom:1px solid var(--line)}.simple-head{display:grid;grid-template-columns:1fr 380px;align-items:end;gap:40px;margin-bottom:34px}.simple-head h2{font:800 clamp(32px,4vw,48px) var(--serif);margin:6px 0 0}.simple-head p{margin:0;color:var(--muted)}.lesson-filters{display:flex;gap:8px;margin-bottom:18px}.visual-list{display:grid;gap:22px}.visual-card{display:grid;grid-template-columns:42% 1fr;background:var(--paper);color:var(--ink);text-decoration:none;overflow:hidden;transition:.25s}.visual-card:hover{transform:translateY(-3px);box-shadow:var(--shadow)}.visual-card img{width:100%;height:100%;min-height:300px;object-fit:cover}.visual-card>div{padding:34px 38px;display:flex;flex-direction:column}.visual-card span{font:600 10px var(--mono);color:var(--red)}.visual-card h3{font:700 clamp(25px,3vw,38px)/1.25 var(--serif);margin:18px 0 12px}.visual-card p{color:var(--muted)}.visual-card b{margin-top:auto;color:var(--red)}.phase-summary{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-bottom:38px}.phase-summary>div{padding:25px;background:var(--paper)}.phase-summary span,.phase-summary b{display:block}.phase-summary span{font:600 10px var(--mono);color:var(--red)}.phase-summary b{font:700 25px var(--serif);margin:5px 0}.phase-summary p{margin:0;color:var(--muted);font-size:13px}.syllabus-list{border-top:1px solid var(--ink)}.syllabus-row{display:grid;grid-template-columns:62px 1fr 230px;gap:22px;align-items:center;padding:19px 8px;border-bottom:1px solid var(--line)}.syllabus-row>span{font:600 11px var(--mono);color:var(--red)}.syllabus-row h3{font:700 18px var(--serif);margin:0 0 3px}.syllabus-row p{font-size:13px;color:var(--muted);margin:0}.syllabus-row>b{font-size:12px;color:var(--green)}.lesson-cover{margin:42px 0 0}.lesson-cover img{display:block;width:100%;aspect-ratio:16/9;object-fit:cover}.lesson-cover figcaption{font-size:12px;color:var(--muted);padding-top:10px}
@media(max-width:720px){.simple-hero{margin:0 -18px;height:640px}.simple-hero>img{object-position:65% center}.simple-hero:after{background:linear-gradient(0deg,rgba(14,19,20,.96),rgba(14,19,20,.18) 72%)}.hero-overlay{left:24px;right:24px;top:auto;bottom:34px;transform:none;width:auto}.hero-overlay h1{font-size:45px}.promise-bar{grid-template-columns:1fr;margin:0 -18px}.promise-bar div{border-right:0;border-bottom:1px solid var(--line);padding:16px 22px}.simple-section{padding:56px 0}.simple-head{grid-template-columns:1fr;gap:8px}.lesson-filters{overflow:auto}.visual-card{grid-template-columns:1fr}.visual-card img{min-height:0;aspect-ratio:16/10}.visual-card>div{padding:25px 22px;min-height:280px}.phase-summary{grid-template-columns:1fr}.syllabus-row{grid-template-columns:42px 1fr}.syllabus-row>b{grid-column:2}.lesson-cover{margin-inline:-18px}.lesson-cover figcaption{padding-inline:18px}}
.lesson-hero{padding-top:76px}.lesson-hero h1{font-size:clamp(42px,5vw,58px);line-height:1.14;letter-spacing:-.045em}
@media(max-width:620px){.lesson-hero h1{font-size:40px}}