/* Shared course hub and reference catalog. Colors reuse DESIGN.md tokens. */
body:has(.library-portal),body:has(.ref-catalog){background:var(--member-bg);color:var(--member-ink)}
body:has(.library-portal) .site-header,body:has(.ref-catalog) .site-header{background:var(--member-surface);border-color:var(--member-line)}
.library-portal,.ref-catalog{--color-primary:var(--member-deep);--color-line:var(--member-line);--color-muted:var(--member-muted);--color-surface:var(--member-surface)}
.portal-hero{display:grid;grid-template-columns:1.15fr .85fr;align-items:center;gap:28px;min-height:455px;padding:44px 48px;background:linear-gradient(115deg,var(--color-white),var(--member-soft));border:1px solid var(--member-line);border-radius:28px;overflow:hidden}
.portal-kicker{color:var(--member-deep);font-size:14px;letter-spacing:1.5px;font-weight:700;margin-bottom:22px}.portal-kicker span{color:var(--member-purple);margin-right:7px}
.portal-hero h1{font:750 clamp(32px,3.6vw,49px)/1.42 var(--font-ui);letter-spacing:-1px;margin-bottom:20px}.portal-hero h1 span{color:var(--member-purple)}.portal-intro{color:var(--member-muted);font-size:16px;line-height:1.9;margin-bottom:28px}
.portal-primary{background:var(--member-deep);color:var(--color-white);border-color:var(--member-deep);padding:13px 22px;gap:22px;font-size:14px;box-shadow:0 7px 20px #6340801a}.portal-primary:hover{background:var(--member-purple);border-color:var(--member-purple)}
.portal-proof{display:flex;gap:20px;margin-top:22px;font-size:11px;color:var(--member-muted)}.portal-proof span:before{content:'·';margin-right:7px;color:var(--member-purple)}
.portal-hero-art{position:relative;min-height:340px;isolation:isolate}.portal-book{position:absolute;width:51%;aspect-ratio:3/4;border:5px solid var(--color-white);border-radius:5px 11px 11px 5px;overflow:hidden;box-shadow:8px 18px 28px #2e204338;background:var(--member-soft)}.portal-book img{width:100%;height:100%;object-fit:cover}.portal-book:after{content:'';position:absolute;inset:0;background:linear-gradient(transparent 35%,#201622ab)}.portal-book>span{position:absolute;z-index:1;bottom:18px;left:12px;right:12px;text-align:center;font:600 21px/1.65 var(--font-reading);color:var(--color-white)}.portal-book>span small{font-size:12px;font-weight:400}
.portal-book-back{top:10px;left:2%;transform:rotate(-12deg)}.portal-book-front{top:36px;right:4%;transform:rotate(9deg)}.portal-spark{position:absolute;color:var(--member-purple);font-size:31px}.portal-spark-one{right:1%;top:-15px}.portal-spark-two{left:1%;bottom:-5px}.portal-art-note{position:absolute;z-index:2;bottom:-8px;right:7%;background:var(--member-surface);color:var(--member-deep);padding:7px 15px;transform:rotate(-5deg);border:1px solid var(--member-line);font-size:12px;box-shadow:0 4px 12px #6340800d}
.portal-account-bar{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:0 0 21px;margin-bottom:28px;border-bottom:1px solid var(--member-line);font-size:13px}.portal-account-bar>span{display:flex;align-items:center;gap:10px}.portal-account-bar i{height:6px;width:6px;flex:none;border-radius:50%;background:var(--member-purple)}.portal-account-bar small{color:var(--member-muted);font-size:11px}.portal-account-bar a{font-weight:650;color:var(--member-deep)}
.portal-catalog{margin-top:28px;padding:32px;border:1px solid var(--member-line);border-radius:24px;background:var(--color-white)}.portal-heading{display:flex;align-items:center;justify-content:space-between;gap:22px;margin-bottom:25px}.portal-heading .section-eyebrow{font-size:10px;letter-spacing:2px;margin-bottom:8px;color:var(--member-muted)}.portal-heading h2{font:650 29px/1.5 var(--font-ui);margin-bottom:8px;color:var(--member-ink)}.portal-heading p:last-child{color:var(--member-muted);font-size:13px;line-height:1.8;margin:0}.portal-heading-note{flex:none;padding:7px 13px;border-radius:7px;background:var(--member-soft);color:var(--member-deep);font-size:12px;line-height:1.6}
.portal-tabs{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:4px;padding:5px;background:var(--member-soft);border:1px solid var(--member-line);border-radius:12px}.portal-tabs button{min-width:0;min-height:46px;padding:10px 6px;border:1px solid transparent;border-radius:8px;background:transparent;color:var(--member-deep);font:600 14px/1.4 var(--font-ui);white-space:nowrap}.portal-tabs button:hover{background:var(--member-surface)}.portal-tabs button[aria-pressed=true]{background:var(--member-purple);border-color:var(--member-purple);color:var(--color-white);box-shadow:0 3px 0 var(--member-deep)}.portal-filter-status{font-size:12px;color:var(--member-muted);line-height:1.8;margin:15px 0 18px}
.portal-course-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px;align-items:stretch}.portal-course{--course-accent:var(--member-deep);--course-soft:var(--member-soft);display:flex;flex-direction:column;min-width:0;border:1px solid var(--member-line);border-radius:15px;background:var(--color-white);overflow:hidden;transition:transform .18s ease,box-shadow .18s ease}.portal-course-gaokao{--course-accent:var(--course-gaokao-accent);--course-soft:var(--course-gaokao-soft)}.portal-course-ielts{--course-accent:var(--course-ielts-accent);--course-soft:var(--course-ielts-soft)}.portal-course-kaoyan{--course-accent:var(--course-kaoyan-accent);--course-soft:var(--course-kaoyan-soft)}.portal-course-cet{--course-accent:var(--course-cet-accent);--course-soft:var(--course-cet-soft)}.portal-course:hover{transform:translateY(-2px);box-shadow:0 10px 22px #63408014}.portal-course-cover{position:relative;display:block;flex:none;aspect-ratio:3/4;overflow:hidden;background:var(--course-soft)}.portal-course-cover>img{display:block;width:100%;height:100%;object-fit:cover}.portal-course-cover:after{content:'';position:absolute;inset:0;background:linear-gradient(transparent 28%,#151426bd)}.portal-cover-title{position:absolute;left:12px;right:12px;bottom:21px;z-index:1;text-align:center;color:var(--course-soft);text-shadow:0 2px 12px #0008}.portal-cover-title>span{font-size:9px;letter-spacing:2px}.portal-cover-title strong{display:block;font:600 31px/1.4 var(--font-reading);letter-spacing:2px;margin:8px 0}.portal-cover-title small{font-size:10px;letter-spacing:1.5px}
.portal-course-copy{display:flex;flex-direction:column;flex:1;min-width:0;padding:21px 18px 18px}.portal-course-label{align-self:flex-start;padding:3px 8px;border-radius:5px;background:var(--course-soft);color:var(--course-accent);font-size:11px;line-height:1.6}.portal-course-copy h3{font:700 23px/1.4 var(--font-ui);color:var(--course-accent);margin:13px 0 12px}.portal-course-copy h3>span{display:block;margin-top:3px;font-size:14px;font-weight:500;letter-spacing:1px;color:var(--member-ink)}.portal-course-copy>p{font-size:12px;color:var(--member-muted);line-height:1.85;margin:0 0 14px;overflow-wrap:anywhere}.portal-course-status{display:block;font-size:11px;line-height:1.8;color:var(--member-deep);padding-top:13px;margin-bottom:18px;border-top:1px solid var(--member-line);overflow-wrap:anywhere}.portal-course-enter{display:flex;justify-content:space-between;align-items:center;gap:8px;min-height:46px;margin-top:auto;padding:12px 13px;border:1px solid transparent;border-radius:8px;background:var(--course-soft);font-size:12px;font-weight:650;line-height:1.6;color:var(--course-accent)}.portal-course-enter:hover{border-color:var(--course-accent)}.portal-course-enter>span:last-child{flex:none;font-size:18px}
.portal-note{display:flex;align-items:center;justify-content:center;gap:16px;text-align:left;padding:24px 22px;margin-top:24px;background:var(--member-soft);border-radius:12px;color:var(--member-muted)}.portal-note>span{font-size:33px;color:var(--member-purple)}.portal-note p{font-size:12px;line-height:1.9;margin:0}.portal-note strong{font-size:13px;color:var(--member-deep)}
.portal-reading-band{display:flex;justify-content:space-between;gap:25px;align-items:center;padding:34px 0 0;margin-top:15px}.portal-reading-band h2{font:500 24px/1.5 var(--font-reading);margin:6px 0 10px}.portal-reading-band p{font-size:12px;color:var(--member-muted);margin-bottom:0}.portal-reading-band .section-eyebrow{color:var(--member-purple)}
.ref-breadcrumb{margin-bottom:25px;font-size:12px;color:var(--member-deep)}.ref-heading{display:flex;align-items:center;justify-content:space-between;gap:25px;margin-bottom:24px}.ref-heading h1{font:650 32px/1.5 var(--font-ui);margin-bottom:10px}.ref-heading p{color:var(--member-muted)}.ref-notice{padding:20px 23px;background:var(--member-soft);border:1px solid var(--member-line);border-radius:12px;font-size:13px;line-height:1.8;margin-bottom:25px}.ref-notice p{margin-bottom:0}.ref-courses{display:flex;flex-wrap:wrap;gap:5px;width:max-content;max-width:100%;margin-bottom:20px;background:var(--member-soft)}.ref-courses button{min-height:42px;font-size:13px}.ref-courses button[aria-pressed=true]{background:var(--member-deep);color:var(--color-white)}.ref-course-count{font-size:10px;margin-left:6px;opacity:.8}.ref-tools{display:flex;gap:20px;align-items:center;margin-bottom:24px}.ref-search{flex:1;max-width:560px}.ref-search-label{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap}.ref-genre{display:flex;align-items:center;gap:9px;font-size:12px}.ref-genre select{max-width:250px}.ref-results-heading{font-size:13px;color:var(--member-muted);margin-bottom:15px}.ref-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:17px}.ref-card{display:flex;flex-direction:column;min-width:0;padding:23px 25px;border:1px solid var(--member-line);border-radius:14px;background:var(--member-surface)}.ref-card-top{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:12px}.ref-course-label{font-size:11px;font-weight:650;color:var(--member-deep)}.ref-number{font:12px/1.5 Georgia,serif;color:var(--member-muted)}.ref-card-title{font:600 19px/1.7 var(--font-reading);margin:0 0 13px;overflow-wrap:anywhere}.ref-card-meta{display:flex;flex-wrap:wrap;gap:10px;font-size:11px;color:var(--member-muted);margin:0 0 20px}.ref-card-bottom{display:flex;align-items:center;justify-content:space-between;gap:12px;border-top:1px solid var(--member-line);padding-top:14px;margin-top:auto}.ref-status{font-size:10px;padding:3px 7px;background:var(--member-soft);color:var(--member-deep);border-radius:4px}.ref-source-link{font-size:12px;min-height:35px;display:inline-flex;align-items:center;color:var(--member-deep)}.ref-link-unavailable{font-size:12px;color:var(--member-muted)}.ref-empty{grid-column:1/-1;border:1px dashed var(--member-line);border-radius:14px;padding:45px 25px;text-align:center;background:var(--member-surface)}.ref-empty p{color:var(--member-muted);font-size:13px}.ref-empty-kicker{font-size:11px;letter-spacing:2px}.ref-pagination{display:flex;justify-content:center;align-items:center;gap:20px;margin-top:25px;color:var(--member-muted);font-size:12px}
@media(max-width:1100px){.portal-hero{padding:35px 30px;gap:15px}.portal-hero-art{min-height:300px}.portal-hero h1{font-size:36px}.portal-catalog{padding:26px}.portal-course-grid{gap:16px}.portal-course-copy{padding:18px 14px 15px}.portal-cover-title strong{font-size:27px}}
@media(max-width:1000px){.portal-course-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}.portal-course-copy{padding:23px 21px 21px}.portal-cover-title strong{font-size:36px}.portal-cover-title{bottom:28px}.portal-course-copy>p{font-size:13px}.portal-course-status{font-size:12px}}
@media(max-width:760px){.portal-hero{grid-template-columns:1fr;padding:32px 26px;border-radius:22px}.portal-hero-copy{position:relative;z-index:2}.portal-hero h1{font-size:34px}.portal-hero-art{width:340px;max-width:90%;height:340px;margin:10px auto 8px}.portal-intro{font-size:14px}.portal-catalog{padding:22px;border-radius:20px}.portal-account-bar>span{flex-wrap:wrap;gap:6px}.portal-account-bar small{width:100%;padding-left:12px}.portal-account-bar a{flex:none}.portal-heading{align-items:flex-start;flex-direction:column;gap:12px}.portal-heading h2{font-size:25px}.portal-course-grid{gap:16px}.portal-course-copy{padding:20px 17px 17px}.portal-cover-title strong{font-size:29px}.portal-reading-band{align-items:flex-start;flex-direction:column;gap:20px}.ref-heading{align-items:flex-start;flex-direction:column;gap:8px}.ref-heading h1{font-size:27px}.ref-tools{align-items:stretch;flex-direction:column;gap:13px}.ref-search{max-width:none;width:100%}.ref-grid{grid-template-columns:1fr}.ref-notice{padding:17px}.ref-courses{width:100%;display:grid;grid-template-columns:repeat(3,1fr)}.ref-courses button{padding:8px;font-size:12px}.ref-genre select{flex:1;max-width:none}.ref-card{padding:20px}.ref-heading .btn{font-size:12px}}
@media(max-width:560px){.portal-catalog{padding:19px 16px}.portal-account-bar{align-items:flex-start;flex-wrap:wrap;gap:10px;margin-bottom:23px;padding-bottom:18px}.portal-heading h2{font-size:24px}.portal-heading-note{font-size:11px}.portal-tabs{gap:2px;padding:4px}.portal-tabs button{font-size:13px;min-height:44px;padding:9px 2px}.portal-course-grid{grid-template-columns:minmax(0,1fr);gap:22px}.portal-course-copy{padding:23px 21px 21px}.portal-cover-title strong{font-size:36px}.portal-cover-title>span{font-size:10px}.portal-cover-title small{font-size:11px}.portal-course-copy h3{font-size:26px}.portal-course-enter{font-size:13px;min-height:48px}.portal-course-status{margin-bottom:19px}}
@media(max-width:420px){.portal-hero{padding:26px 19px}.portal-hero h1{font-size:29px}.portal-kicker{font-size:11px;letter-spacing:.7px}.portal-hero-art{height:295px;min-height:295px}.portal-book>span{font-size:17px}.portal-note{padding:18px 15px;gap:11px}.portal-note p{font-size:11px}.portal-proof{gap:12px}}
.portal-course-cover:focus-visible{outline:3px solid var(--member-deep);outline-offset:-5px}
.portal-note a{color:var(--member-deep);text-decoration:underline;text-underline-offset:3px;margin-left:8px}
@media(prefers-reduced-motion:reduce){.portal-course{transition:none}.portal-course:hover{transform:none}}
@media(forced-colors:active){.portal-tabs button[aria-pressed=true],.ref-courses button[aria-pressed=true]{outline:2px solid Highlight}.portal-course-status,.ref-status{border:1px solid ButtonText}}