:root {
  --purple:#6c4df6; --purple-dark:#5334dc; --purple-soft:#ede8ff; --ink:#201d32;
  --muted:#777388; --line:#eae7f1; --bg:#f7f7fb; --white:#fff; --lime:#d9f995;
  font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei","PingFang SC",sans-serif;
  color:var(--ink); font-size:15px; -webkit-font-smoothing:antialiased;
}
*{box-sizing:border-box}body{margin:0;background:#eeedf5}button,input,textarea{font:inherit}button,a,input,textarea{-webkit-tap-highlight-color:transparent}button{border:0;background:none;color:inherit;cursor:pointer}button:disabled{cursor:default}a{color:inherit;text-decoration:none}svg{display:block;flex-shrink:0;width:22px;height:22px}button:focus-visible,a:focus-visible{outline:3px solid #b6a5ff;outline-offset:4px}input:focus-visible,textarea:focus-visible{outline:none}[hidden]{display:none!important}.sr-only{position:absolute;width:1px;height:1px;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap}.skip-link{position:fixed;top:-100px;left:20px;background:var(--purple);color:white;z-index:100;padding:12px}.skip-link:focus{top:10px}
.app-shell{max-width:1180px;height:100dvh;min-height:420px;margin:0 auto;background:var(--bg);display:flex;flex-direction:column;box-shadow:0 0 70px #28125c06;overflow:hidden}
.app-header{height:76px;min-height:76px;padding:0 34px;display:flex;align-items:center;justify-content:space-between;gap:16px;background:#fff;border-bottom:1px solid #efedf5;z-index:4}
.app-brand{display:flex;align-items:center;gap:10px;font-weight:750;font-size:23px;letter-spacing:-.7px}.brand-symbol{height:35px;width:35px;background:var(--purple);border-radius:11px;display:grid;place-items:center;color:white;box-shadow:0 5px 12px #6c4df626}.brand-symbol svg{width:25px;height:25px}.brand-subtitle{font-size:12px;letter-spacing:0;font-weight:400;color:#a5a0b2;border-left:1px solid #e8e4f0;padding-left:14px;margin-left:7px}.header-actions{display:flex;gap:16px;align-items:center}.preview-badge{font-size:12px;color:#8e84a7;background:#f6f3fe;border:1px solid #eee8fb;padding:6px 10px;border-radius:8px;display:flex;gap:6px;align-items:center}.preview-badge svg{width:13px;height:13px}.avatar-button{width:37px;height:37px;display:grid;place-items:center;background:#ede8ff;color:var(--purple);border:3px solid #faf8ff;border-radius:50%}.avatar-button svg{width:19px;height:19px}
.page-header-left{display:flex;align-items:center;gap:15px}.back-button{height:40px;width:40px;display:grid;place-items:center;border:1px solid var(--line);border-radius:12px;background:white}.back-button:hover{background:#f2eeff}.back-button svg{width:20px;height:20px}.page-header-title{font-size:18px;font-weight:700;line-height:1.4}.page-header-title small{display:block;font-size:11px;color:var(--muted);font-weight:400;margin-top:4px}.header-text-button{display:flex;align-items:center;gap:6px;font-size:13px;font-weight:600;color:var(--purple);padding:10px 12px;background:#f4f0ff;border-radius:10px}.header-text-button svg{width:17px;height:17px}.icon-button{height:40px;width:40px;display:grid;place-items:center;border-radius:12px;color:#837b96}.icon-button:hover{background:#f0ebff;color:var(--purple)}
.app-scroll{flex:1;min-height:0;overflow:auto;overscroll-behavior:contain;scrollbar-width:thin;scrollbar-color:#dcd5ed transparent}.page-content{padding:28px 34px 34px;max-width:1180px;margin:0 auto}
.bottom-nav{flex-shrink:0;min-height:74px;padding-bottom:env(safe-area-inset-bottom);border-top:1px solid var(--line);background:#ffffffed;backdrop-filter:blur(16px);z-index:5;display:flex;justify-content:center}.nav-inner{width:580px;max-width:100%;display:grid;grid-template-columns:repeat(4,1fr)}.tab-button{display:flex;align-items:center;justify-content:center;flex-direction:column;gap:6px;min-height:73px;color:#a29aae;font-size:12px;position:relative}.tab-button .tab-icon{height:30px;width:42px;display:grid;place-items:center;border-radius:10px;transition:background .18s,color .18s}.tab-button svg{width:21px;height:21px;stroke-width:1.7}.tab-button.active{color:var(--purple);font-weight:700}.tab-button.active .tab-icon{background:#f0ebff}.tab-button.active .tab-icon svg{stroke-width:2}.tab-button:hover{color:var(--purple)}.tab-button.chat-tab .tab-icon{background:var(--purple);color:white;box-shadow:0 4px 12px #6c4df62b}.tab-button.chat-tab.active .tab-icon{background:#5938dd}
.intro-row{display:flex;justify-content:space-between;align-items:flex-end;gap:16px;margin-bottom:23px}.mini-label{font-size:12px;font-weight:500;color:#9890a8;letter-spacing:.7px}.intro-row h1,.page-heading h1{font-size:29px;line-height:1.4;letter-spacing:-1px;margin:7px 0 0;font-weight:750}.intro-note{display:flex;align-items:center;gap:7px;font-size:12px;color:#9a91ac;white-space:nowrap;padding-bottom:5px}.intro-note svg{width:15px;height:15px;color:#aa9bc5}
.home-top{display:grid;grid-template-columns:1.23fr 1fr;gap:20px}.featured-course{border-radius:22px;background:linear-gradient(118deg,#6b49f2 0%,#7959f4 65%,#a88bff 100%);position:relative;overflow:hidden;min-height:263px;color:white;box-shadow:0 10px 25px #6c4df612}.featured-course:after{content:"";position:absolute;inset:0;background:radial-gradient(ellipse at 0 100%,#4f2ecf60,transparent 70%);pointer-events:none}.featured-copy{position:relative;z-index:2;width:65%;padding:28px 0 26px 28px}.course-label{font-size:11px;display:inline-flex;align-items:center;gap:6px;border:1px solid #ffffff35;background:#ffffff14;border-radius:20px;padding:5px 9px;color:#f2edff}.course-label svg{height:12px;width:12px}.featured-copy h2{font-size:30px;line-height:1.3;letter-spacing:-.9px;margin:16px 0 10px;font-weight:750}.featured-copy p{font-size:13px;line-height:1.8;max-width:230px;color:#e0d7ff;margin:0 0 24px}.feature-bottom{display:flex;align-items:center;gap:15px}.feature-bottom small{font-size:11px;color:#d4c6ff;white-space:nowrap}.white-button{display:inline-flex;align-items:center;gap:16px;border-radius:10px;background:white;color:#5d3ee1;font-size:13px;font-weight:650;padding:11px 14px;min-height:42px;box-shadow:0 3px 8px #3e208a0b}.white-button:hover{background:#f2eeff}.white-button svg{width:16px;height:16px}.featured-art{position:absolute;width:250px;height:250px;right:-24px;top:3px;z-index:1}.course-illustration{height:100%;width:100%;display:block}
.home-ask{background:linear-gradient(133deg,#f2efff,#f8f6ff);border:1px solid #e5ddfc;border-radius:22px;padding:24px;position:relative;overflow:hidden;display:flex;flex-direction:column}.ask-kicker{display:flex;align-items:center;gap:7px;color:#7860c8;font-size:12px;font-weight:600}.mini-spark{width:24px;height:24px;background:#e6ddff;display:grid;place-items:center;border-radius:8px}.mini-spark svg{width:15px;height:15px}.home-ask h2{font-size:25px;line-height:1.4;letter-spacing:-.8px;margin:12px 0 5px;font-weight:720}.home-ask-description{font-size:12px;color:#89749f;margin:0 0 19px;line-height:1.8}.home-question-form{display:flex;align-items:center;gap:8px;background:white;border:1px solid #e4dcf5;border-radius:12px;padding:7px 7px 7px 13px;margin-top:auto;box-shadow:0 2px 8px #6c4df606}.home-question-form:focus-within{border-color:#b8a7f8;box-shadow:0 0 0 3px #6c4df60a}.home-question-form input{flex:1;min-width:0;border:0;background:none;font-size:13px;color:var(--ink);height:35px}.home-question-form input::placeholder{color:#b3a8c8}.send-square{width:36px;height:36px;background:var(--purple);color:white;border-radius:9px;display:grid;place-items:center;flex-shrink:0}.send-square:hover{background:var(--purple-dark)}.send-square svg{width:18px;height:18px}.home-ask-foot{margin-top:12px;font-size:11px;display:flex;gap:5px;align-items:center;color:#a498ba}.home-ask-foot svg{height:13px;width:13px}
.home-lower{display:grid;grid-template-columns:1.7fr 1fr;gap:24px;margin-top:26px}.section-heading{display:flex;align-items:center;justify-content:space-between;margin-bottom:15px;gap:12px}.section-heading h2{font-size:18px;margin:0;font-weight:720;letter-spacing:-.3px}.text-link{display:flex;align-items:center;gap:4px;font-size:12px;color:#9b90af;white-space:nowrap}.text-link svg{width:14px;height:14px}.text-link:hover{color:var(--purple)}
.course-cards{display:grid;grid-template-columns:1fr 1fr;gap:13px}.course-card{text-align:left;display:grid;grid-template-columns:91px 1fr;border:1px solid #ebe6f4;background:white;border-radius:16px;overflow:hidden;min-width:0;transition:transform .18s,box-shadow .18s}.course-card:hover{transform:translateY(-3px);box-shadow:0 8px 24px #4a348010}.course-cover{overflow:hidden;position:relative;min-height:134px}.art-talk{background:linear-gradient(140deg,#b7a3ff,#7652ec)}.art-time{background:linear-gradient(145deg,#e4f9bd,#b8df79)}.course-cover .course-illustration{position:absolute;inset:0;width:142%;height:100%;left:-18%}.course-card-body{padding:14px 12px;display:flex;flex-direction:column;min-width:0}.course-category{font-size:10px;color:#a594c1}.course-card h3{font-size:14px;line-height:1.65;font-weight:650;margin:7px 0 10px;overflow-wrap:anywhere}.course-card-foot{font-size:10px;color:#aaa1b7;margin-top:auto;display:flex;gap:5px;align-items:center}.course-card-foot svg{width:12px;height:12px}.little-quote{border:1px solid #e5e9da;background:#eff3e9;border-radius:16px;padding:17px 20px;min-height:134px;position:relative}.little-quote .quote-symbol{color:#b0be97;font-family:Georgia,serif;font-size:40px;line-height:24px}.little-quote blockquote{font-size:15px;font-weight:500;line-height:1.9;letter-spacing:-.3px;margin:5px 0 11px;color:#506342;white-space:pre-line}.quote-source{font-size:10px;color:#95a084;display:flex;align-items:center;gap:5px;padding:0;text-align:left}.quote-source:hover{color:#5f7649}.quote-source svg{height:12px;width:12px}
.page-heading{margin:3px 0 24px}.page-heading p{color:#91889f;font-size:13px;margin:9px 0 0;line-height:1.8}.filter-chips{display:flex;gap:10px;margin-bottom:24px;overflow-x:auto;scrollbar-width:none}.filter-chip{padding:10px 18px;min-height:42px;border-radius:25px;background:white;color:#8c829d;font-size:13px;border:1px solid #e8e1f0;white-space:nowrap}.filter-chip.active{background:var(--purple);border-color:var(--purple);color:white;font-weight:600}.catalog-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px;max-width:1000px;margin:0 auto}.catalog-card{background:white;border:1px solid #e9e4f0;border-radius:20px;overflow:hidden;text-align:left;transition:transform .18s}.catalog-card:hover{transform:translateY(-3px)}.catalog-cover{height:190px;position:relative;overflow:hidden}.catalog-cover .course-illustration{position:absolute;width:230px;height:230px;left:50%;top:-18px;transform:translateX(-50%)}.cover-badge{position:absolute;left:19px;top:17px;z-index:1;border:1px solid #ffffff6b;background:#ffffff3d;backdrop-filter:blur(8px);border-radius:7px;padding:5px 8px;color:#55488b;font-size:11px}.art-time .cover-badge{color:#5c7348}.catalog-body{padding:22px 24px}.catalog-body h2{font-size:22px;letter-spacing:-.7px;margin:0 0 9px;line-height:1.5}.catalog-body p{font-size:13px;line-height:1.8;color:#7f6d91;margin:0 0 20px}.catalog-foot{display:flex;justify-content:space-between;align-items:center;font-size:12px;color:#aa9cb8}.circle-arrow{height:32px;width:32px;display:grid;place-items:center;border-radius:50%;background:#f2edff;color:var(--purple)}.circle-arrow svg{width:16px;height:16px}.catalog-note{font-size:11px;color:#b1a8bd;text-align:center;margin:26px 0 0}
.detail-hero{display:grid;grid-template-columns:1.3fr 1fr;position:relative;overflow:hidden;padding:32px;border-radius:22px;background:#ebe4ff;min-height:245px}.detail-hero.time-theme{background:#ecf4df}.detail-copy{position:relative;z-index:1}.detail-copy .course-label{background:#ffffff6b;border-color:#ffffffaa;color:#8a70bd}.detail-copy h1{font-size:31px;line-height:1.45;letter-spacing:-1px;margin:16px 0 10px}.detail-copy p{font-size:14px;line-height:1.9;color:#8b7b9f;max-width:430px;margin:0}.detail-metadata{display:flex;gap:14px;align-items:center;font-size:12px;color:#9b8aae;margin-top:23px}.detail-metadata>span{display:flex;gap:6px;align-items:center}.detail-metadata svg{width:15px;height:15px}.detail-art{position:absolute;height:265px;width:265px;right:25px;top:-8px;opacity:.9}.detail-body{display:grid;grid-template-columns:1.5fr 1fr;gap:26px;margin-top:29px}.chapter-card{border-radius:17px;background:white;border:1px solid #e9e3f0;overflow:hidden}.chapter-row{display:flex;align-items:center;gap:15px;min-height:78px;width:100%;text-align:left;padding:16px 21px;border-bottom:1px solid #f0eaf6}.chapter-row:last-child{border-bottom:0}.chapter-row:hover{background:#fcfaff}.chapter-num{font-size:14px;font-weight:650;color:#b9aace;font-variant-numeric:tabular-nums}.chapter-name{font-size:14px;line-height:1.7;flex:1;font-weight:500}.chapter-state{font-size:11px;color:#b2a4bf;font-weight:400;display:block;margin-top:4px}.chapter-row.is-read .chapter-state{color:#8b73bc}.chapter-row>svg{width:16px;height:16px;color:#c2b4ce}.detail-side{display:flex;flex-direction:column;gap:17px}.detail-ask-card{padding:25px;background:white;border:1px solid #e4dcf3;border-radius:18px}.detail-ask-card h3{font-size:18px;line-height:1.6;margin:13px 0 8px;letter-spacing:-.3px}.detail-ask-card p{font-size:13px;line-height:1.9;color:#9b8da8;margin:0 0 20px}.primary-button{display:flex;align-items:center;justify-content:center;gap:11px;background:var(--purple);color:white;min-height:46px;padding:12px 18px;border-radius:12px;font-size:14px;font-weight:600}.primary-button:hover{background:var(--purple-dark)}.primary-button svg{width:17px;height:17px}.full-width{width:100%}.detail-scope{font-size:11px;line-height:1.9;color:#b0a4bb;padding:0 5px}
body[data-view="chat"] .app-scroll{overflow:hidden}.chat-page{height:100%;display:flex;flex-direction:column;max-width:900px;margin:0 auto;min-height:0}.chat-course-bar{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:15px 28px 14px;border-bottom:1px solid #ece7f5;flex-shrink:0}.course-switch{display:flex;gap:10px;align-items:center;text-align:left;padding:0;min-width:0}.tiny-cover{width:35px;height:40px;border-radius:7px;display:grid;place-items:center;font-size:17px;font-weight:700;color:#fff;flex-shrink:0}.tiny-cover.art-time{color:#6c8546}.switch-course-title{font-size:13px;font-weight:650;line-height:1.6;white-space:nowrap;max-width:260px;overflow:hidden;text-overflow:ellipsis}.switch-course-title small{display:block;font-size:10px;color:#a99ab7;font-weight:400}.switch-chevron{color:#aa9bba;transform:rotate(90deg);width:13px;height:13px;margin-left:5px}.course-directory-link{font-size:12px;color:var(--purple);border:1px solid #e4dbf7;border-radius:8px;padding:8px 10px;background:#fff;white-space:nowrap}
.chat-thread{overflow:auto;flex:1;min-height:0;padding:25px 28px 10px;scrollbar-width:thin;scrollbar-color:#dcd3eb transparent;scroll-behavior:smooth;overscroll-behavior:contain}.chat-empty{max-width:680px;margin:20px auto 10px}.echo-mascot{width:61px;height:61px;border-radius:21px;background:linear-gradient(140deg,#ac91ff,#6a44ec);box-shadow:0 8px 22px #7550e72b;display:grid;place-items:center;color:white;margin-bottom:20px;transform:rotate(-6deg)}.echo-mascot svg{width:34px;height:34px;transform:rotate(6deg)}.chat-empty h1{font-size:27px;line-height:1.5;letter-spacing:-.7px;font-weight:730;margin:0 0 9px}.chat-empty>p{font-size:13px;color:#836994;line-height:1.9;margin:0 0 26px}.sample-question-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}.sample-question{background:white;border:1px solid #e7dff1;padding:15px 16px;border-radius:12px;text-align:left;min-height:81px}.sample-question:hover{border-color:#bca7eb;background:#fdfaff}.sample-question-label{display:flex;gap:7px;align-items:center;font-size:12px;color:#7d5b9a;font-weight:600}.sample-question-label svg{height:15px;width:15px}.sample-question p{font-size:12px;line-height:1.8;color:#806b8f;margin:9px 0 0}
.chat-compose-area{flex-shrink:0;padding:12px 28px 15px;background:var(--bg)}.chat-composer{padding:11px 11px 9px 15px;border:1px solid #ded3ef;background:white;border-radius:16px;box-shadow:0 4px 15px #59418b06;display:flex;align-items:flex-end;gap:9px}.chat-composer:focus-within{border-color:#b49ae9;box-shadow:0 0 0 3px #774ee908}.chat-composer textarea{flex:1;min-width:0;resize:none;background:none;border:0;line-height:1.8;max-height:112px;font-size:15px;color:#4e405f;padding:3px 0}.chat-composer textarea::placeholder{color:#b7a8c5}.chat-composer .send-square{height:36px;width:36px}.send-square:disabled{background:#e9e2f4;color:#b9a6ce}.composer-note{font-size:10px;color:#b3a5c0;text-align:center;line-height:1.8;margin:8px 0 0}.form-error{font-size:12px;color:#bf637c;margin:7px 0 0}.form-error:empty{display:none}
.turn{max-width:780px;margin:0 auto 29px;scroll-margin-top:18px}.question-row{display:flex;justify-content:flex-end;margin-bottom:20px}.question-bubble{background:#6e4ff0;color:white;max-width:86%;font-size:14px;line-height:1.9;padding:12px 17px;border-radius:17px 4px 17px 17px;white-space:pre-wrap;overflow-wrap:anywhere;box-shadow:0 3px 9px #6c4df60c}.assistant-heading{display:flex;align-items:center;gap:8px;font-size:12px;font-weight:650;color:#8065a7;margin-bottom:12px}.assistant-avatar{width:28px;height:28px;border-radius:9px;background:#e9dfff;color:#8866c4;display:grid;place-items:center}.assistant-avatar svg{width:18px;height:18px}.assistant-heading small{font-size:10px;border:1px solid #e3d9ee;padding:2px 6px;border-radius:5px;color:#af9cbe;font-weight:400}.answer-body{background:white;border:1px solid #e9e0f0;border-radius:4px 18px 18px 18px;padding:23px 24px}.answer-body h2{font-size:20px;line-height:1.65;letter-spacing:-.3px;margin:0 0 14px;font-weight:700;color:#44324e}.answer-summary{font-size:14px;line-height:1.95;color:#715780;margin:0 0 19px;overflow-wrap:anywhere}.citation-inline{display:inline-grid;place-items:center;font-size:10px;height:18px;min-width:18px;border-radius:5px;vertical-align:super;line-height:1;margin-left:4px;background:#eee5fa;color:#a080bd;padding:0 4px}.citation-inline:hover{background:#ddcef2;color:#764c9e}.answer-steps{margin:0 0 22px;padding:0;list-style:none;display:grid;gap:11px}.answer-step{display:flex;align-items:flex-start;gap:10px;font-size:13px;line-height:1.9;color:#7d638b}.step-number{height:23px;width:23px;display:grid;place-items:center;border-radius:8px;background:#f4eef9;color:#b197c2;font-size:11px;flex-shrink:0;margin-top:1px}.answer-step strong{font-weight:600;color:#74607f}.answer-example{border-left:3px solid #c4a8df;background:#f7f1fa;border-radius:0 11px 11px 0;padding:15px 17px;margin:0 0 21px}.example-label{font-size:11px;font-weight:500;color:#ad91be;display:flex;align-items:center;gap:7px;margin-bottom:9px}.example-label svg{height:13px;width:13px}.answer-example p{font-size:14px;line-height:1.95;color:#8a6a97;margin:0;overflow-wrap:anywhere}.supplement{font-size:13px;color:#8f7898;line-height:1.95}.answer-sources-title{font-size:11px;color:#baa5c6;margin:0 0 9px;display:flex;align-items:center;gap:5px}.answer-sources-title svg{height:13px;width:13px}.answer-source{display:flex;align-items:center;gap:9px;width:100%;padding:10px 12px;background:#faf7fc;border:1px solid #e9deef;border-radius:9px;text-align:left;margin-top:6px}.answer-source:hover{border-color:#c3a4d9;background:#f8f0fd}.source-ref-number{height:25px;width:25px;border-radius:7px;display:grid;place-items:center;flex-shrink:0;background:#ece0f4;color:#b08bc5;font-size:12px}.answer-source strong{font-size:12px;color:#7e5897;font-weight:550;line-height:1.6}.answer-source small{font-size:10px;color:#b9a4c5;display:block;margin-top:3px}.answer-source>svg{width:14px;height:14px;color:#c3abd0;margin-left:auto}.answer-tools{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-top:14px;font-size:10px;color:#baa4c6}.copy-button{display:flex;gap:5px;align-items:center;font-size:11px;color:#b49ac3;padding:4px}.copy-button svg{height:13px;width:13px}.followup-list{display:flex;gap:7px;flex-wrap:wrap;margin-top:12px}.followup-button{border:1px solid #e2d7eb;background:#fff;font-size:11px;padding:8px 10px;border-radius:9px;color:#ac90bd;display:flex;align-items:center;gap:5px;line-height:1.7;text-align:left}.followup-button svg{width:12px;height:12px}.followup-button:hover{border-color:#c2a5d5;background:#faf5fd}.outside-label{font-size:11px;display:flex;align-items:center;gap:6px;color:#b59c89;margin-bottom:10px}.outside-label svg{height:14px;width:14px}
.me-banner{display:flex;gap:18px;align-items:center;padding:6px 0 26px}.me-avatar{width:68px;height:68px;border:5px solid white;background:linear-gradient(145deg,#d5c1fa,#a68ae1);border-radius:23px;color:white;font-size:28px;font-weight:650;box-shadow:0 4px 15px #6d4e9610;display:grid;place-items:center}.me-banner h1{font-size:26px;letter-spacing:-.7px;margin:0 0 8px}.me-banner p{font-size:12px;color:#a28bac;margin:0}.stats-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:30px}.stat-card{padding:24px;background:white;border-radius:17px;border:1px solid #e8def0;display:flex;align-items:center;gap:18px}.stat-icon{height:48px;width:48px;display:grid;place-items:center;background:#f1e8fa;border-radius:15px;color:#af87cd}.stat-icon svg{height:23px;width:23px}.stat-value{font-size:30px;font-weight:700;letter-spacing:-1px;line-height:1.2}.stat-value small{font-size:12px;letter-spacing:0;color:#ab91b7;font-weight:400;margin-left:6px}.stat-card p{font-size:12px;color:#b19abc;margin:7px 0 0}.record-list{background:white;border:1px solid #e8deef;border-radius:17px;overflow:hidden}.record-button{width:100%;display:flex;align-items:center;gap:13px;padding:18px 20px;border-bottom:1px solid #f0e7f5;text-align:left}.record-button:last-child{border-bottom:0}.record-button:hover{background:#fcf8ff}.record-button>svg{height:18px;width:18px;color:#baa3c7}.record-content{flex:1;min-width:0}.record-content strong{font-size:13px;font-weight:500;display:block;line-height:1.7;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.record-content small{font-size:11px;color:#b29ac0;display:block;margin-top:4px}.empty-records{text-align:center;padding:35px 24px;color:#ac96ba;font-size:13px;line-height:2}.empty-records svg{height:28px;width:28px;margin:0 auto 9px;color:#d3c2df}.empty-records button{margin:16px auto 0}.me-note{margin-top:25px;background:#eee7fa;border:1px solid #e2d4f5;border-radius:15px;display:flex;gap:12px;padding:20px;font-size:12px;color:#a084b7;line-height:1.9}.me-note>svg{width:20px;height:20px;margin-top:2px;flex-shrink:0}.me-note strong{font-weight:600;color:#8d6ea8;display:block;margin-bottom:4px}.me-note p{margin:0}.me-about{width:100%;display:flex;align-items:center;justify-content:space-between;margin-top:18px;padding:17px 2px;font-size:13px;color:#a389b5}.me-about svg{height:16px;width:16px}
.sheet{border:0;background:white;color:var(--ink);font:inherit;border-radius:23px;width:540px;max-width:calc(100% - 32px);max-height:86dvh;padding:0;box-shadow:0 25px 100px #29154433;scrollbar-width:thin;scrollbar-color:#dac5ea transparent}.sheet::backdrop{background:#25153f59;backdrop-filter:blur(2px)}.sheet-handle{display:none}.sheet-header{display:flex;justify-content:space-between;align-items:center;padding:15px 22px;border-bottom:1px solid #f0e8f6;position:sticky;top:0;background:white;z-index:2}.sheet-header h2{font-size:17px;letter-spacing:-.3px;margin:0}.sheet-eyebrow{font-size:12px;color:#aa8fba}.source-content{padding:24px 28px 30px}.source-course{font-size:12px;color:#b89bcb;margin:0 0 18px}.source-chapter-badge{display:inline-flex;gap:8px;align-items:center;background:#f0e6fa;border:1px solid #e5d4f2;border-radius:7px;padding:6px 9px;font-size:11px;color:#ac83c2}.source-content h2{font-size:25px;letter-spacing:-.6px;line-height:1.6;margin:16px 0 10px;font-weight:700}.source-meta{font-size:11px;color:#b69cc5;line-height:1.8;display:flex;gap:5px;align-items:center;padding-bottom:23px;border-bottom:1px solid #f0e8f6}.source-meta svg{height:13px;width:13px}.source-paragraph{font-size:14px;color:#80618f;line-height:2.1;margin:22px 0;overflow-wrap:anywhere}.source-paragraph.highlighted{background:#f6eefb;border-left:3px solid #c9a7e0;padding:15px 18px;border-radius:0 10px 10px 0;color:#7f5798}.paragraph-label{display:block;color:#ba98cb;font-size:10px;margin-bottom:5px;letter-spacing:1px}.source-disclaimer{font-size:11px;line-height:1.9;color:#bfa8cc;margin:26px 0 23px}.switch-options{padding:8px 22px 24px}.switch-option{width:100%;display:flex;align-items:center;gap:13px;text-align:left;border:1px solid #ebdff3;border-radius:13px;padding:16px;margin-top:11px;background:white}.switch-option.active{border-color:#c3a4de;background:#faf4ff}.switch-option strong{font-size:14px;font-weight:600}.switch-option small{display:block;font-size:11px;color:#b199c0;margin-top:7px}.switch-option .check-mark{margin-left:auto;color:#ac84c9}.check-mark svg{width:18px;height:18px}.about-content{padding:27px 28px 31px}.about-symbol{width:54px;height:54px;border-radius:17px;background:var(--purple);color:white;display:grid;place-items:center;margin-bottom:22px;box-shadow:0 6px 18px #774bdd24}.about-symbol svg{height:32px;width:32px}.about-content h2{font-size:28px;letter-spacing:-.6px;line-height:1.5;margin:9px 0 17px}.about-content>p{font-size:14px;color:#8c6b99;line-height:2;margin:12px 0 18px}.demo-explanation{padding:17px 18px;background:#f5edfb;border:1px solid #ebdff5;border-radius:13px}.demo-explanation strong{font-size:13px;color:#825b9c}.demo-explanation p{font-size:12px;color:#9a7aaa;line-height:2;margin:8px 0 0}.about-content .privacy-note{font-size:11px;line-height:1.9;color:#b79ac6;margin:18px 0 23px}.toast{position:fixed;z-index:100;bottom:100px;left:50%;transform:translateX(-50%);background:#3c2753;color:white;padding:12px 23px;border-radius:12px;font-size:13px;box-shadow:0 6px 22px #30184222;max-width:calc(100% - 32px);text-align:center}.noscript{position:fixed;inset:0;padding:40px;background:white;z-index:200}
@media(min-width:1500px){.app-shell{max-width:1240px}.page-content{padding-top:36px}.home-top{gap:24px}.featured-course{min-height:290px}.featured-copy{padding:34px}.featured-copy h2{font-size:34px}.featured-art{width:280px;height:280px;right:-12px}.home-ask{padding:30px}.home-ask h2{font-size:28px}.home-lower{margin-top:32px}.course-card{grid-template-columns:110px 1fr}.course-cover{min-height:153px}.course-card-body{padding:18px 16px}.course-card h3{font-size:16px}}
@media(max-width:900px) and (min-width:701px){.app-header{padding-left:25px;padding-right:25px}.page-content{padding-left:25px;padding-right:25px}.home-top{grid-template-columns:1.1fr 1fr;gap:15px}.featured-copy{padding:26px 0 24px 22px;width:72%}.featured-copy h2{font-size:28px}.featured-art{width:210px;height:210px;right:-43px;top:23px}.feature-bottom small{display:none}.home-ask{padding:22px}.home-ask h2{font-size:22px}.home-lower{grid-template-columns:1fr}.little-quote{display:none}.detail-copy p{max-width:330px}.detail-art{right:-20px}.detail-body{grid-template-columns:1.3fr 1fr;gap:18px}.chapter-row{padding:15px}.detail-ask-card{padding:21px}}
@media(max-width:700px){
  body{background:var(--bg)}.app-shell{width:100%;min-height:0;box-shadow:none}.app-header{height:64px;min-height:64px;padding:0 21px;background:#fff;border-bottom:0}.app-brand{font-size:21px;gap:8px}.brand-symbol{width:31px;height:31px;border-radius:10px}.brand-symbol svg{width:22px;height:22px}.brand-subtitle{display:none}.header-actions{gap:11px}.preview-badge{font-size:10px;padding:5px 7px;border-radius:6px}.preview-badge svg{height:11px;width:11px}.avatar-button{height:33px;width:33px}.avatar-button svg{height:17px;width:17px}.page-content{padding:21px 20px 25px}
  .page-header-left{gap:11px;min-width:0}.back-button{height:35px;width:35px;border-radius:10px}.back-button svg{height:18px;width:18px}.page-header-title{font-size:17px}.page-header-title small{font-size:10px}.header-text-button{font-size:12px;padding:8px 9px;white-space:nowrap}.header-text-button svg{height:15px;width:15px}
  .bottom-nav{min-height:68px}.tab-button{min-height:67px;font-size:11px;gap:4px}.tab-button .tab-icon{height:28px;width:38px;border-radius:9px}.tab-button svg{width:20px;height:20px}
  .intro-row{margin-bottom:19px}.intro-row .mini-label{font-size:11px;letter-spacing:.4px}.intro-row h1{font-size:25px;letter-spacing:-.8px;margin-top:5px}.intro-note{display:none}
  .home-top{display:flex;flex-direction:column;gap:14px}.featured-course{border-radius:20px;min-height:209px}.featured-copy{width:67%;padding:23px 0 23px 22px}.course-label{font-size:10px;padding:4px 7px;gap:4px}.course-label svg{height:11px;width:11px}.featured-copy h2{font-size:27px;margin:13px 0 8px;letter-spacing:-.8px}.featured-copy p{font-size:12px;line-height:1.8;max-width:180px;margin-bottom:18px}.featured-art{height:216px;width:216px;right:-42px;top:-2px}.white-button{font-size:12px;min-height:38px;padding:9px 11px;gap:10px;border-radius:9px}.feature-bottom small{display:none}
  .home-ask{padding:17px 17px 14px;border-radius:17px;background:linear-gradient(135deg,#f0eaff,#f9f6ff);overflow:visible}.ask-kicker{font-size:10px;position:absolute;right:17px;top:19px;gap:4px}.mini-spark{width:19px;height:19px;border-radius:6px}.mini-spark svg{width:12px;height:12px}.home-ask h2{font-size:17px;letter-spacing:-.4px;line-height:1.5;margin:0 0 12px}.home-ask h2 br{display:none}.home-ask-description{display:none}.home-question-form{padding:5px 5px 5px 10px;border-radius:10px}.home-question-form input{font-size:12px;min-height:33px}.send-square{width:33px;height:33px;border-radius:8px}.home-ask-foot{font-size:9px;margin-top:9px}
  .home-lower{display:block;margin-top:25px}.section-heading{margin-bottom:14px}.section-heading h2{font-size:17px}.text-link{font-size:11px}.course-cards{gap:12px}.course-card{display:block;border-radius:14px}.course-cover{height:112px;min-height:112px}.course-cover .course-illustration{width:158px;height:153px;left:50%;top:-17px;transform:translateX(-50%)}.course-card-body{padding:13px 13px 14px}.course-category{font-size:10px}.course-card h3{font-size:14px;line-height:1.6;margin:7px 0 12px;min-height:45px;letter-spacing:-.3px}.course-card-foot{font-size:10px}.home-quote{margin-top:25px}.little-quote{min-height:0;padding:20px}.little-quote blockquote{font-size:15px}.quote-source{font-size:10px}
  .page-heading{margin-top:2px;margin-bottom:22px}.page-heading h1{font-size:27px}.page-heading p{font-size:12px;line-height:1.9;margin-top:8px}.filter-chips{gap:8px;margin-bottom:23px}.filter-chip{font-size:12px;min-height:39px;padding:9px 15px}.catalog-grid{grid-template-columns:1fr;gap:20px}.catalog-card{border-radius:18px}.catalog-cover{height:186px}.catalog-cover .course-illustration{height:230px;width:230px;top:-18px}.catalog-body{padding:21px 22px}.catalog-body h2{font-size:22px}.catalog-body p{font-size:13px}.catalog-note{font-size:10px}
  .detail-hero{padding:23px;display:block;min-height:238px;border-radius:20px}.detail-copy{max-width:76%}.detail-copy h1{font-size:27px;line-height:1.5;margin:14px 0 10px}.detail-copy p{font-size:12px;max-width:220px;line-height:1.9}.detail-art{width:190px;height:190px;top:37px;right:-47px;opacity:.75}.detail-metadata{font-size:10px;gap:10px;margin-top:21px}.detail-metadata svg{height:12px;width:12px}.detail-body{display:flex;flex-direction:column;gap:22px;margin-top:25px}.chapter-row{min-height:77px;padding:15px 17px;gap:13px}.chapter-num{font-size:13px}.chapter-name{font-size:13px}.chapter-state{font-size:10px}.detail-ask-card{padding:21px}.detail-ask-card h3{font-size:18px}.detail-ask-card p{font-size:12px}
  .chat-course-bar{padding:12px 20px;border-bottom:1px solid #ece5f4;gap:9px}.tiny-cover{width:31px;height:36px;font-size:15px;border-radius:6px}.course-switch{gap:8px}.switch-course-title{font-size:12px;max-width:215px}.switch-course-title small{font-size:9px}.switch-chevron{margin-left:2px;width:11px;height:11px}.course-directory-link{font-size:11px;padding:7px 9px}
  .chat-thread{padding:22px 18px 9px}.chat-empty{margin:10px auto 15px}.echo-mascot{height:53px;width:53px;border-radius:18px;margin-bottom:21px}.echo-mascot svg{height:30px;width:30px}.chat-empty h1{font-size:24px;line-height:1.5}.chat-empty>p{font-size:12px;line-height:1.9;margin-bottom:23px}.sample-question-grid{gap:9px}.sample-question{padding:13px 12px;min-height:104px;border-radius:11px}.sample-question-label{font-size:11px;gap:5px}.sample-question-label svg{height:13px;width:13px}.sample-question p{font-size:11px;line-height:1.85;margin-top:8px}.chat-compose-area{padding:10px 16px 10px}.chat-composer{border-radius:13px;padding:10px 9px 9px 13px}.chat-composer textarea{font-size:15px;line-height:1.7}.chat-composer .send-square{height:34px;width:34px}.composer-note{font-size:9px;margin-top:7px}.form-error{font-size:11px}
  .turn{margin-bottom:24px}.question-bubble{font-size:14px;max-width:90%;padding:11px 15px}.question-row{margin-bottom:18px}.assistant-heading{font-size:11px;gap:7px}.assistant-avatar{width:26px;height:26px;border-radius:8px}.assistant-heading small{font-size:9px}.answer-body{padding:19px 17px;border-radius:4px 15px 15px 15px}.answer-body h2{font-size:20px;line-height:1.65;margin-bottom:13px}.answer-summary{font-size:14px;line-height:1.95}.answer-step{font-size:13px;gap:9px;line-height:1.95}.step-number{height:22px;width:22px;font-size:10px;border-radius:7px}.answer-example{padding:13px 14px;margin-bottom:20px}.answer-example p{font-size:14px}.example-label{font-size:10px}.answer-source{padding:10px;gap:8px}.answer-source strong{font-size:12px}.answer-source small{font-size:10px}.answer-sources-title{font-size:10px}.answer-tools{font-size:9px}.copy-button{font-size:10px}.followup-button{font-size:11px;padding:8px 9px}.outside-label{font-size:10px}
  .me-banner{gap:14px;padding:4px 0 25px}.me-avatar{width:62px;height:62px;border-radius:21px;font-size:25px}.me-banner h1{font-size:24px}.me-banner p{font-size:11px}.stats-grid{gap:12px;margin-bottom:26px}.stat-card{padding:18px 15px;gap:10px;border-radius:15px}.stat-icon{height:35px;width:35px;border-radius:11px}.stat-icon svg{height:19px;width:19px}.stat-value{font-size:26px}.stat-value small{font-size:10px;margin-left:3px}.stat-card p{font-size:10px;margin-top:5px}.record-button{padding:16px 15px;gap:10px}.record-content strong{font-size:12px}.record-content small{font-size:10px}.me-note{padding:17px;font-size:11px;gap:9px}.me-about{font-size:12px}
  .sheet{position:fixed;inset:auto 0 0;max-width:100%;width:100%;max-height:87dvh;margin:0;border-radius:25px 25px 0 0;box-shadow:0 -12px 65px #24103226;padding-bottom:env(safe-area-inset-bottom)}.sheet-handle{display:block;position:sticky;top:0;height:17px;background:white;border-radius:25px 25px 0 0;z-index:3}.sheet-handle:after{content:"";position:absolute;width:33px;height:4px;top:8px;left:50%;transform:translateX(-50%);border-radius:4px;background:#e5dbea}.sheet-header{top:17px;padding:7px 20px 12px}.sheet-header h2{font-size:16px}.sheet-eyebrow{font-size:11px}.sheet .icon-button{height:34px;width:34px;border-radius:10px}.sheet .icon-button svg{height:18px;width:18px}.source-content{padding:22px 23px 27px}.source-course{font-size:11px;margin-bottom:15px}.source-content h2{font-size:23px;line-height:1.6;margin-top:15px}.source-paragraph{font-size:14px;line-height:2.1}.source-meta{font-size:10px}.source-disclaimer{font-size:10px}.switch-options{padding:3px 20px 25px}.switch-option{padding:15px}.switch-option strong{font-size:13px}.switch-option small{font-size:10px}.about-dialog{border-radius:25px 25px 0 0;max-height:90dvh}.about-content{padding:20px 24px 27px}.about-content h2{font-size:27px}.about-content>p{font-size:13px}.demo-explanation p{font-size:12px}.privacy-note{font-size:11px}.toast{bottom:91px;font-size:12px}
}
@media(max-width:360px){.page-content{padding-left:16px;padding-right:16px}.app-header{padding-left:17px;padding-right:17px}.featured-copy{padding-left:19px}.featured-copy h2{font-size:25px}.featured-art{right:-53px}.home-ask h2{font-size:16px}.ask-kicker{font-size:9px;right:14px}.intro-row h1{font-size:23px}.home-ask{padding-left:14px;padding-right:14px}.course-card-body{padding-left:11px;padding-right:11px}.course-card h3{font-size:13px}.chat-course-bar{padding-left:17px;padding-right:17px}.switch-course-title{max-width:190px}.course-directory-link{font-size:10px;padding:7px}.sample-question-label{font-size:10px}.sample-question p{font-size:10px}.sample-question{padding:12px 10px}.answer-body{padding-left:15px;padding-right:15px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}

.featured-copy h2.long-title{font-size:27px;line-height:1.45}@media(max-width:700px){.featured-copy h2.long-title{font-size:23px}}
.switch-chevron svg{width:12px;height:12px}.source-chapter-badge svg{width:13px;height:13px}
/* 聊天页只滚动对话正文，顶部课程与底部输入始终留在视口内。 */
body{height:100dvh;overflow:hidden}
body[data-view="chat"] #app-view{height:100%;min-height:0;display:flex;flex-direction:column}
.chat-page{width:100%;flex:1;height:auto;min-height:0}
.white-button{min-height:44px}.send-square,.chat-composer .send-square{width:42px;height:42px}.icon-button{width:44px;height:44px}
@media(max-width:700px){.send-square,.chat-composer .send-square{width:44px;height:44px}.white-button{min-height:44px}.back-button{width:40px;height:40px}.sheet .icon-button{height:40px;width:40px}}
.detail-copy h1,.featured-copy h2{text-wrap:balance}
.me-note{color:#7f668f}.me-note strong{color:#6f4e85}.record-content small{color:#9a7cad}
@media(max-width:700px){.me-note{font-size:12px;line-height:1.9}.stat-card p{font-size:11px}.record-content strong{font-size:13px}.me-banner p{font-size:12px}}

/* Learning app refinement — shared visual hierarchy inside the phone. */
:root{--ink:#242037;--muted:#756c87;--bg:#f7f6fb;--line:#e9e5f0}
.nav-inner{grid-template-columns:repeat(3,1fr)}.tab-button.chat-tab .tab-icon{background:transparent;color:inherit;box-shadow:none}.tab-button.chat-tab.active .tab-icon{background:var(--purple-soft);color:var(--purple)}.tab-button.active .tab-icon{background:var(--purple-soft)}
.learning-home{padding-top:24px}.learning-intro .mini-label{color:#756c87;font-size:12px;letter-spacing:1px}.learning-intro h1{font-size:26px;letter-spacing:-1px;line-height:1.4;margin:9px 0}.learning-intro p{font-size:13px;line-height:1.8;color:#756c87;margin:0}.resume-card{position:relative;margin:24px 0;display:flex;align-items:center;gap:12px;padding:17px 16px;background:#ede8ff;border:1px solid #e4dcff;border-radius:16px;flex-wrap:wrap}.resume-icon{width:38px;height:38px;border-radius:12px;background:#ded4ff;color:#5839d2;display:grid;place-items:center;flex-shrink:0}.resume-icon svg{width:20px;height:20px}.resume-copy{flex:1;min-width:0}.resume-copy>span{font-size:11px;color:#65528c;display:block;line-height:1.6}.resume-copy>strong{font-size:13px;font-weight:600;line-height:1.8;display:block}.resume-button{min-height:44px;padding:0 12px;border-radius:11px;background:white;color:#5939d9;font-weight:650;display:flex;align-items:center;justify-content:center;gap:12px;font-size:12px;margin-left:50px;flex:1}.resume-button svg{width:15px;height:15px}.learning-library{margin-top:24px}.section-heading h2{display:flex;align-items:center;gap:9px}.count-label{color:#756c87;font-size:11px;letter-spacing:1px;font-weight:400}.learning-home .course-cards{display:flex;flex-direction:column;gap:12px}.learning-course-card{display:flex;align-items:stretch;border-radius:16px;min-height:108px;width:100%;background:#fff;border:1px solid var(--line);position:relative}.learning-course-card .course-cover{width:82px;min-width:82px;min-height:106px;height:auto;overflow:hidden;position:relative}.learning-course-card .course-cover .course-illustration{width:152px;height:152px;position:absolute;left:50%;top:50%;transform:translate(-50%,-50%)}.learning-course-card .course-card-body{flex:1;padding:13px 10px 13px 16px;justify-content:center}.learning-course-card .course-category{font-size:10px;color:#756c87;line-height:1.5}.learning-course-card h3{font-size:15px;line-height:1.6;margin:5px 0 8px;min-height:0;letter-spacing:-.3px;font-weight:650}.learning-course-card .course-card-foot{font-size:10px;color:#756c87;display:flex;align-items:center;gap:6px;line-height:1.5;margin:0}.small-dot{height:2px;width:2px;background:#756c87;border-radius:50%}.course-card-arrow{width:31px;display:grid;place-items:center;color:#8c819e;padding-right:10px}.course-card-arrow svg{width:15px;height:15px}.text-link{color:#756c87;min-height:44px}.section-heading{margin-bottom:10px}.learning-ask{padding:18px 16px;background:#fff;border:1px solid var(--line);border-radius:16px;margin-top:24px}.learning-ask-heading{display:flex;align-items:center;gap:9px}.learning-ask-heading h2{font-size:15px;letter-spacing:-.3px;font-weight:650;margin:0;line-height:1.5}.learning-ask>p{font-size:11px;line-height:1.7;color:#756c87;margin:10px 0 12px}.learning-ask .home-question-form{background:#f7f6fb;padding:5px 5px 5px 11px;border:1px solid var(--line)}.learning-ask .home-question-form input{font-size:12px;height:44px}.learning-ask .home-question-form input::placeholder{color:#756c87}.learning-ask .form-error:empty{margin:0}.learning-ask-note{display:flex;gap:6px;align-items:center;font-size:10px;color:#756c87;margin-top:11px;line-height:1.7}.learning-ask-note svg{width:12px;height:12px}.learning-footnote{font-size:10px;color:#756c87;text-align:center;margin:21px 0 0;line-height:1.8}
.app-header{background:white}.app-scroll{scrollbar-width:none}.app-scroll::-webkit-scrollbar,.chat-thread::-webkit-scrollbar{display:none}.app-header .avatar-button,.back-button,.icon-button,.sheet .icon-button{height:44px;width:44px;min-height:44px;min-width:44px}.app-header .avatar-button{border-width:5px}.send-square,.chat-composer .send-square{width:44px;height:44px}.preview-badge{min-height:36px;color:#67567f;background:#f4f0ff}.course-category,.course-card-foot,.page-heading p,.mini-label,.catalog-foot,.catalog-note,.detail-copy p,.detail-metadata,.chapter-state,.detail-ask-card p,.detail-scope,.switch-course-title small,.course-directory-link,.chat-empty>p,.composer-note,.answer-tools,.answer-tools>span,.answer-sources-title,.answer-source small,.me-banner p,.record-content small,.me-note,.me-about{color:#756c87}.source-content h2{color:var(--ink)}.source-course,.source-meta,.sheet-eyebrow,.source-disclaimer,.paragraph-label,.source-chapter-badge{color:#756c87}.source-paragraph{color:#494052}.source-paragraph.highlighted{color:#494052}.source-meta{line-height:1.8}.source-paragraph{line-height:1.9;font-size:15px}.chat-empty h1{font-size:24px}.chat-empty{margin-top:8px}.sample-question p,.sample-question-label{font-size:12px;color:#756c87}.sample-question-label{color:#503981}.sample-question{background:#fff;min-height:108px}.chat-course-bar{background:#fff}.chat-composer{background:#fff}.chat-composer textarea::placeholder{color:#756c87}.answer-body{box-shadow:none;border:1px solid var(--line);padding:19px 17px}.answer-body h2{font-size:21px;line-height:1.6}.answer-summary,.answer-step,.answer-example p{color:#494052}.answer-summary{font-size:15px;line-height:1.9}.answer-step{font-size:14px;line-height:1.9}.answer-example{background:#f6f3fc;border:0;border-left:3px solid #c7b7f8}.example-label{color:#69518d}.answer-example p{font-size:14px;line-height:1.85}.filter-chip{min-height:44px}.followup-button,.copy-button,.header-text-button,.course-directory-link{min-height:44px}.chapter-name{font-size:14px}.detail-hero{background:#eee9fa}.detail-copy h1{font-size:26px}.detail-body{gap:24px}.me-banner h1{font-size:24px}.record-content strong{color:var(--ink)}.me-note p{line-height:1.8}.empty-records{color:#756c87}.toast{font-size:13px}.nav-inner .tab-button{color:#756c87}.nav-inner .tab-button.active{color:#6041df}.page-content{padding-left:20px;padding-right:20px}.switch-course-title{font-size:13px;max-width:210px}.form-error{color:#b33156;font-size:12px;line-height:1.7}
@media(min-width:701px){.learning-home{max-width:700px}.learning-intro h1{font-size:28px}.resume-button{margin-left:0;flex:0 0 auto}.learning-home .course-cards{display:grid;grid-template-columns:1fr 1fr}.learning-course-card{min-height:124px}.learning-course-card .course-cover{min-height:122px}.learning-ask{padding:22px}.learning-library{margin-top:24px}}
@media(max-width:700px){.learning-intro h1{font-size:25px}.app-header{padding-left:20px;padding-right:16px}.header-actions{gap:5px}.preview-badge{padding:6px;font-size:10px}.app-brand{font-size:20px}.page-content{padding:24px 20px}.learning-course-card .course-card-body{padding-right:0}.bottom-nav{min-height:72px}.tab-button{min-height:71px;font-size:11px}.sheet-header{padding-right:12px}.chat-thread{padding-left:16px;padding-right:16px}.chat-compose-area{padding:10px 16px}.chat-composer textarea{font-size:15px}.detail-copy{max-width:77%}}
.resume-card{display:grid;grid-template-columns:34px minmax(0,1fr) auto;gap:10px}.resume-icon{width:34px;height:34px;border-radius:11px}.resume-button{margin:0;flex:none;gap:7px;padding:0 10px;max-width:104px}.resume-copy>strong{font-size:13px;line-height:1.7}
.citation-inline{display:inline-flex;vertical-align:middle;width:44px;height:44px;min-width:44px;min-height:44px;align-items:center;justify-content:center;background:transparent;border:0;border-radius:10px;color:#6041df;margin:-5px 0;font-size:11px}.citation-inline span{display:grid;place-items:center;background:#ede8ff;border:1px solid #ded3ff;height:22px;width:22px;border-radius:7px;line-height:1}.citation-inline:hover{background:#f3efff}.source-paragraph.is-cited{background:#f6f3fc;border-left:3px solid #bba4f5;border-radius:0 12px 12px 0;padding:15px 16px}.source-paragraph mark{color:#3b265e;background:#e4d8ff;padding:3px 0;border-radius:3px;box-decoration-break:clone;-webkit-box-decoration-break:clone}.source-paragraph .paragraph-label{font-size:10px;letter-spacing:.7px;color:#756c87;margin-bottom:10px}.sheet-eyebrow{line-height:1.6;max-width:calc(100% - 54px)}.demo-notice{font-size:12px;line-height:1.9;color:#756c87;background:#f6f3fc;padding:12px;border-radius:10px}.answer-step>.step-number{margin-top:5px}.answer-tools{line-height:1.7}.answer-sources-title{font-size:11px}
.source-paragraph>p{margin:0;font:inherit;color:inherit;line-height:1.9}.source-paragraph .paragraph-label{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px;gap:8px}.ask-passage{min-height:44px;min-width:72px;display:flex;align-items:center;justify-content:center;gap:5px;font-size:11px;color:#6041df;padding:0 6px;border-radius:9px}.ask-passage svg{width:13px;height:13px}.ask-passage:hover{background:#ede8ff}.source-paragraph.is-cited .ask-passage{background:#ede8ff}.source-paragraph{scroll-margin-top:100px}.passage-context{display:flex;align-items:center;gap:4px;border:1px solid #e4dcf6;background:#f2edff;border-radius:11px;margin-bottom:6px;padding-left:10px}.passage-return{display:flex;align-items:center;gap:7px;flex:1;min-width:0;min-height:44px;color:#5e4483;font-size:11px;text-align:left;padding:0}.passage-return>svg{height:14px;width:14px}.passage-return small{margin-left:auto;display:flex;align-items:center;gap:3px;white-space:nowrap;font-size:10px}.passage-return small svg{width:11px;height:11px}.clear-passage{height:44px;width:44px;min-width:44px;color:#756c87}.clear-passage svg{width:16px;height:16px}.passage-prompts{display:flex;gap:5px;margin:0 0 7px}.passage-prompts button{flex:1;min-height:44px;padding:0 3px;font-size:11px;border:1px solid #e9e5f0;border-radius:9px;background:white;color:#604c79;white-space:nowrap}.passage-prompts button:hover{background:#f2edff}.passage-empty{padding-top:0}.passage-empty .echo-mascot{width:42px;height:42px;border-radius:14px;margin-bottom:15px}.passage-empty .echo-mascot svg{width:24px;height:24px}.passage-empty h1{font-size:22px}.passage-empty>p{font-size:12px;line-height:1.8;margin:12px 0}.passage-empty blockquote{margin:17px 0;border-left:3px solid #c3b0ef;border-radius:0 12px 12px 0;background:#f0ebfa;padding:14px 15px;font-size:14px;color:#5c496f;line-height:1.85;text-align:left}.question-context{display:block;font-size:10px;color:#ece6ff;margin-bottom:5px}.reading-records{margin:25px 0}.reading-records .record-list{margin:0}.chat-thread{scrollbar-width:none}.resume-copy>strong{overflow-wrap:anywhere}.source-content .source-disclaimer{font-size:12px;line-height:1.8}.form-error:empty{margin:0}.chat-compose-area{background:#f7f6fb}.source-dialog .source-meta{font-size:11px}
.assistant-heading small,.answer-source small,.source-chapter-badge,.source-meta,.sheet-eyebrow{color:#756c87}.chat-composer:focus-within,.home-question-form:focus-within{border-color:#6c4df6;box-shadow:0 0 0 2px #6c4df616}button:focus-visible,a:focus-visible{outline:2px solid #6c4df6;outline-offset:3px}.source-paragraph .paragraph-label{letter-spacing:0}.course-category{letter-spacing:.2px}
.question-context{color:#fff}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}
.answer-pending{display:flex;align-items:center;gap:9px;padding:23px 17px;font-size:13px;line-height:1.9;color:#756c87}.pending-dot{height:8px;width:8px;min-width:8px;background:#6c4df6;border-radius:50%;animation:answer-pulse 1.3s ease-in-out infinite}.answer-failed h2{font-size:19px}.answer-failed p{font-size:14px;line-height:1.9;color:#756c87}.answer-failed small{display:block;font-size:11px;line-height:1.8;color:#756c87}@keyframes answer-pulse{50%{opacity:.3;transform:scale(.75)}}@media(prefers-reduced-motion:reduce){.pending-dot{animation:none}}