:root{--study-ink:#171717;--study-cream:#f5f1e8;--study-paper:#fffdf8;--study-plum:#5f247e;--study-teal:#0f7077;--study-red:#a21d13;--study-gold:#d59b24;--study-line:#d9d2c4}.study-page{margin:0;background:#eeeae1;color:var(--study-ink);font-family:Arial,"Microsoft YaHei",sans-serif}.study-site-header{position:relative;z-index:20}.study-main{max-width:1540px;margin:auto;padding:0 32px 70px}.study-hero{display:grid;grid-template-columns:minmax(0,1fr) minmax(480px,.72fr);gap:36px;align-items:end;padding:64px 0 38px}.study-hero h1{max-width:760px;margin:8px 0 20px;font-size:clamp(42px,5vw,76px);line-height:.98;letter-spacing:-.055em}.study-hero>div>p:last-child{max-width:660px;color:#53504b;font-size:17px;line-height:1.8}.study-profile-card{display:grid;grid-template-columns:auto 1fr;gap:18px;padding:22px;border:1px solid #bbb3a5;background:#171717;color:#fff;box-shadow:12px 12px 0 rgba(95,36,126,.15)}.study-avatar{position:relative;width:74px;height:74px;border:3px solid #76d8df;border-radius:50%;display:grid;place-items:center;background:#343434;font-size:26px;font-weight:900}.study-avatar i{position:absolute;right:-8px;bottom:-5px;min-width:26px;height:26px;padding:0 3px;border:2px solid #171717;border-radius:50%;display:grid;place-items:center;background:#f4c453;color:#171717;font-size:13px;font-style:normal}.study-profile-card>div:nth-child(2){display:grid;gap:4px;align-content:center}.study-profile-card span{font-size:12px;color:#bfc2c0}.study-profile-card strong{font-size:17px}.study-profile-card small{font-size:10px;color:#9ea5a2}.profile-xp{width:100%;height:4px;margin-top:4px;background:#3d403f}.profile-xp i{display:block;height:100%;width:0;background:#76d8df}.study-profile-card dl{grid-column:1/-1;display:grid;grid-template-columns:repeat(3,1fr);margin:4px 0 0;border-top:1px solid #3e4140}.study-profile-card dl div{padding:14px 10px 0;border-right:1px solid #3e4140}.study-profile-card dl div:last-child{border:0}.study-profile-card dt{font-size:10px;color:#9da4a1}.study-profile-card dd{margin:5px 0 0;font-size:13px}.study-profile-card dd b{font-size:20px}.study-login-gate{display:grid;grid-template-columns:320px 1fr;gap:50px;align-items:center;padding:55px;border:1px solid #c9c1b2;background:#fff;box-shadow:0 22px 50px rgba(50,39,30,.1)}.gate-illustration{height:220px;display:flex;align-items:flex-end;justify-content:center;gap:16px;background:linear-gradient(#dcecef 0 52%,#caa679 52%);border:8px solid #222}.gate-illustration span{width:64px;height:92px;border:4px solid #222;border-radius:6px 6px 0 0;background:#faf4e4;box-shadow:0 -28px 0 -18px #222}.study-login-gate h2{margin:8px 0 10px;font-size:34px}.study-login-gate p:not(.eyebrow){max-width:700px;color:#61615e;line-height:1.8}.study-login-gate a{display:inline-block;margin-top:14px;padding:14px 26px;background:var(--study-red);color:#fff;text-decoration:none;font-weight:700}.campus-picker{padding:28px;border:1px solid var(--study-line);background:var(--study-paper)}.campus-picker>header{display:flex;justify-content:space-between;align-items:end;margin-bottom:20px}.campus-picker h2,.study-sidebar h2{margin:4px 0 0;font-size:25px}.campus-picker header>span{color:#777269;font-size:12px}.campus-cards{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.campus-card{position:relative;min-height:116px;padding:19px;text-align:left;border:1px solid #cfc8ba;background:#f4f0e7;color:#222;cursor:pointer;overflow:hidden}.campus-card:after{content:attr(data-index);position:absolute;right:12px;bottom:-15px;font-size:64px;font-weight:900;color:rgba(95,36,126,.08)}.campus-card span,.campus-card small{display:block}.campus-card span{font-size:10px;letter-spacing:.12em;text-transform:uppercase;color:#716c64}.campus-card strong{display:block;margin:14px 0 5px;font-size:17px}.campus-card small{color:#777269}.campus-card.active{border-color:var(--study-plum);background:var(--study-plum);color:#fff}.campus-card.active span,.campus-card.active small{color:#e8d9f0}.campus-card.active:after{color:rgba(255,255,255,.08)}.study-workspace{display:grid;grid-template-columns:minmax(0,1fr) 390px;gap:20px;margin-top:20px}.virtual-building,.study-sidebar>section{border:1px solid var(--study-line);background:var(--study-paper)}.building-head{display:flex;justify-content:space-between;gap:20px;align-items:end;padding:25px 28px;border-bottom:1px solid var(--study-line)}.building-head span{color:var(--study-teal);font-size:11px;font-weight:700;letter-spacing:.08em}.building-head h2{margin:5px 0;font-size:31px}.building-head p{margin:0;color:#777269;font-family:Georgia,serif;font-style:italic}.room-tabs{display:flex;flex-wrap:wrap;justify-content:flex-end;gap:7px}.room-tabs button{padding:9px 13px;border:1px solid #c7c0b5;background:#fff;color:#35332f;font-weight:700;cursor:pointer}.room-tabs button.active{border-color:#111;background:#111;color:#fff}.classroom{position:relative;min-height:660px;padding:34px 34px 25px;overflow:hidden;background:linear-gradient(180deg,#dbe9ea 0 31%,#efe7d7 31% 100%);transition:.25s}.classroom[data-theme="night-library"]{background:linear-gradient(180deg,#151d2a 0 31%,#3d3028 31% 100%);color:#f7f0df}.classroom[data-theme="rainy-window"]{background:linear-gradient(180deg,#839da6 0 31%,#d7d0c4 31% 100%)}.classroom-windows{position:absolute;inset:22px 20px auto;display:grid;grid-template-columns:repeat(3,1fr);gap:12px;height:155px}.classroom-windows i{border:8px solid rgba(255,255,255,.9);background:linear-gradient(155deg,#80c5df,#d7eef0 52%,#94a8a4 53%,#637a74);box-shadow:inset 0 0 0 1px #42595b}.classroom[data-theme="night-library"] .classroom-windows i{background:linear-gradient(155deg,#192443,#34496e 62%,#e7c25b 63%,#413a31)}.classroom[data-theme="rainy-window"] .classroom-windows i{background:repeating-linear-gradient(105deg,rgba(255,255,255,.25) 0 2px,transparent 2px 12px),linear-gradient(#556f82,#98aeb7)}.classroom-board{position:relative;z-index:2;display:grid;place-items:center;width:min(570px,72%);min-height:110px;margin:96px auto 0;padding:13px;border:9px solid #6f5033;background:#153c31;color:#fff;text-align:center;box-shadow:0 8px 0 rgba(0,0,0,.16)}.classroom-board>span{font-size:10px;letter-spacing:.15em;color:#b7d3c7}.classroom-board strong{font-family:Georgia,serif;font-size:23px}.classroom-board small{font-size:10px;color:#d7e5df}.online-dot{display:inline-block;width:6px;height:6px;margin-right:5px;border-radius:50%;background:#77d8df}.teacher-desk{position:relative;z-index:2;width:190px;height:35px;margin:20px auto 36px;border:4px solid #4f3825;background:#9c7049;display:grid;place-items:center;color:#f7ead8;font-size:9px;letter-spacing:.22em}.seat-grid{position:relative;z-index:2;display:grid;grid-template-columns:repeat(6,minmax(70px,1fr));gap:24px 18px;align-items:start}.seat{position:relative;min-height:66px;padding:7px 5px 4px;border:0;border-top:9px solid #8d633e;background:#bd9168;color:#282018;box-shadow:0 6px 0 #6d4c31,0 10px 12px rgba(70,47,27,.14);cursor:pointer}.seat:before,.seat:after{content:"";position:absolute;bottom:-11px;width:5px;height:14px;background:#493321}.seat:before{left:10px}.seat:after{right:10px}.seat b{display:block;font-size:12px}.seat small{display:block;margin-top:5px;font-size:9px;opacity:.7}.seat:hover:not(:disabled){transform:translateY(-3px);box-shadow:0 9px 0 #6d4c31,0 14px 18px rgba(70,47,27,.18)}.seat.occupied{border-top-color:#595959;background:#777;color:#eee;box-shadow:0 6px 0 #4a4a4a;cursor:not-allowed}.seat.mine{border-top-color:#47bac3;background:#0f7077;color:#fff;box-shadow:0 6px 0 #075158}.seat .mini-avatar{position:absolute;left:50%;top:-31px;width:24px;height:24px;transform:translateX(-50%);border:2px solid #fff;border-radius:50%;display:grid;place-items:center;background:#4b4b4b;color:#fff;font-size:8px}.seat.mine .mini-avatar{background:#a21d13}.room-legend{position:relative;z-index:2;display:flex;justify-content:center;gap:24px;margin-top:38px;padding-top:18px;border-top:1px solid rgba(50,40,30,.2);font-size:10px}.seat-dot{display:inline-block;width:9px;height:9px;margin-right:5px;background:#bd9168}.seat-dot.occupied{background:#777}.seat-dot.mine{background:#0f7077}.study-sidebar{display:grid;gap:20px;align-content:start}.study-sidebar>section{padding:22px}.study-sidebar header{display:flex;align-items:end;justify-content:space-between;padding-bottom:16px;border-bottom:1px solid var(--study-line)}.daily-card header>strong,.reward-card header>span{color:var(--study-teal);font-size:14px}.daily-card header>strong b{font-size:28px}.task-list{display:grid;gap:10px;margin-top:15px}.task-item{display:grid;grid-template-columns:35px 1fr auto;gap:10px;align-items:center;padding:10px 0;border-bottom:1px solid #e6e0d5}.task-check{width:28px;height:28px;border:1px solid #bcb4a6;border-radius:50%;display:grid;place-items:center;color:transparent}.task-item.done .task-check{border-color:var(--study-teal);background:var(--study-teal);color:#fff}.task-item strong{display:block;font-size:12px}.task-item small{color:#817b72;font-size:10px}.task-progress{height:3px;margin-top:5px;background:#e4dfd6}.task-progress i{display:block;height:100%;background:var(--study-gold)}.task-reward{font-size:10px;font-weight:700;color:#99680a}.shop-filters{display:flex;gap:6px;margin:14px 0}.shop-filters button{padding:6px 9px;border:1px solid #d3ccc0;background:#fff;font-size:10px;cursor:pointer}.shop-filters button.active{background:#111;color:#fff}.shop-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:8px;max-height:480px;overflow:auto}.shop-item{display:grid;gap:5px;padding:12px;border:1px solid #ddd5c7;background:#faf7f0}.shop-symbol{height:46px;display:grid;place-items:center;background:#e8e2d8;color:var(--study-plum);font-size:20px;font-weight:900}.shop-item strong{font-size:11px}.shop-item small{font-size:9px;color:#7d776e}.shop-item button{padding:7px;border:1px solid #222;background:#222;color:#fff;font-size:10px;cursor:pointer}.shop-item button:disabled{border-color:#cfc9be;background:#ece7dd;color:#8b867e}.shop-item.equipped{border-color:var(--study-teal);box-shadow:inset 0 0 0 1px var(--study-teal)}.study-session-card{display:grid;grid-template-columns:150px 1fr auto;gap:24px;align-items:center;padding:28px;border-top:1px solid var(--study-line);background:#151515;color:#fff}.session-pulse{position:relative;width:126px;height:126px;border-radius:50%;display:grid;place-items:center;align-content:center;background:conic-gradient(#76d8df var(--progress,0%),#353535 0)}.session-pulse:after{content:"";position:absolute;inset:9px;border-radius:50%;background:#151515}.session-pulse>*{position:relative;z-index:1}.session-pulse b{font-size:25px}.session-pulse small{color:#9ba19f;font-size:9px}.study-session-card h3{margin:5px 0 8px;font-size:24px}.study-session-card p:not(.eyebrow){color:#bfc4c2;font-size:11px}.study-session-card blockquote{margin:13px 0 0;padding-left:12px;border-left:2px solid #76d8df;color:#949997;font-size:11px}.study-session-card>button{padding:11px 15px;border:1px solid #777;background:transparent;color:#ddd;cursor:pointer}.study-setup{width:min(560px,calc(100vw - 32px));padding:30px;border:1px solid #222;background:#fffdf8;color:#191919;box-shadow:18px 18px 0 rgba(0,0,0,.22)}.study-setup::backdrop{background:rgba(14,14,14,.68)}.setup-close{position:absolute;right:15px;top:12px;border:0;background:transparent;font-size:28px;cursor:pointer}.study-setup h2{margin:7px 0 22px;font-size:29px}.study-setup label{display:grid;gap:7px;font-weight:700;font-size:12px}.study-setup input{min-height:45px;padding:0 12px;border:1px solid #bdb6aa;background:#fff;font:inherit}.study-setup fieldset{margin:18px 0;padding:15px;border:1px solid #d5cec1}.study-setup legend{padding:0 6px;font-size:11px;font-weight:700}.duration-presets{display:grid;grid-template-columns:repeat(4,1fr);gap:7px}.duration-presets button{padding:10px 4px;border:1px solid #c8c0b3;background:#fff;cursor:pointer}.duration-presets button.active{border-color:var(--study-plum);background:var(--study-plum);color:#fff}.custom-duration{grid-template-columns:auto 90px auto!important;align-items:center;margin-top:12px}.study-setup form>p{color:#766f66;font-size:10px;line-height:1.6}.start-focus{width:100%;padding:14px;border:0;background:var(--study-red);color:#fff;font-weight:700;cursor:pointer}.study-toast{position:fixed;z-index:100;right:22px;bottom:22px;max-width:390px;padding:14px 18px;border-left:4px solid #76d8df;background:#171717;color:#fff;box-shadow:0 12px 30px rgba(0,0,0,.25);font-size:12px}.study-toast.is-error{border-color:#dc3f32}.eyebrow{margin:0;color:var(--study-teal);font-size:10px!important;font-weight:800;letter-spacing:.13em}.study-avatar[data-outfit="phoenix-red"]{background:#a21d13}.study-avatar[data-outfit="oxford-blue"]{background:#183b69}.study-avatar[data-outfit="library-grey"]{background:#53575a}@media(max-width:1180px){.study-workspace{grid-template-columns:1fr}.study-sidebar{grid-template-columns:1fr 1fr}.campus-cards{grid-template-columns:repeat(2,1fr)}}@media(max-width:820px){.study-main{padding:0 14px 50px}.study-hero{grid-template-columns:1fr;padding-top:38px}.study-profile-card{max-width:none}.campus-picker{padding:18px}.building-head{display:grid}.room-tabs{justify-content:flex-start}.classroom{min-height:570px;padding:24px 14px}.classroom-board{width:80%;margin-top:80px}.seat-grid{grid-template-columns:repeat(4,1fr);gap:21px 10px}.study-sidebar{grid-template-columns:1fr}.study-session-card{grid-template-columns:110px 1fr}.session-pulse{width:100px;height:100px}.study-session-card>button{grid-column:1/-1}.study-login-gate{grid-template-columns:1fr;padding:30px}.gate-illustration{display:none}}@media(max-width:540px){.study-hero h1{font-size:43px}.campus-cards{grid-template-columns:1fr}.seat-grid{grid-template-columns:repeat(3,1fr)}.room-tabs{display:grid;grid-template-columns:1fr}.room-tabs button{text-align:left}.study-profile-card dl{grid-template-columns:1fr}.study-profile-card dl div{border-right:0}.duration-presets{grid-template-columns:repeat(2,1fr)}.study-session-card{grid-template-columns:1fr;text-align:center}.session-pulse{margin:auto}}