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@media(max-width:760px){body{background:#f7f9fc}.topbar{height:58px;padding:0 17px}.brand-mark{width:34px;height:34px;border-radius:12px}.brand-lockup b{font-size:13px}.brand-lockup small{display:none}.top-context{font-size:10px}.avatar{width:33px;height:33px;font-size:14px}.main-content{padding:24px 16px 102px;min-height:calc(100vh - 58px)}.welcome-row{align-items:flex-start}.welcome-row h1,.page-title-row h1{font-size:22px}.welcome-row .muted{font-size:11px}.streak-pill{font-size:10px;padding:8px 10px}.hero-card{min-height:210px;padding:25px 21px;border-radius:18px;margin-top:20px}.hero-card h2{font-size:23px}.hero-card p{font-size:11px}.hero-art{position:absolute;right:-105px;bottom:1px;transform:scale(.76);transform-origin:bottom left;opacity:.8}.stat-grid{gap:8px;margin-top:12px}.stat-card{padding:11px 9px;gap:7px;border-radius:12px}.stat-icon{width:31px;height:31px;font-size:15px;border-radius:9px}.stat-card small{font-size:9px}.stat-card b{font-size:17px}.stat-card em{font-size:9px}.section-heading{margin:24px 0 12px}.section-heading h2{font-size:16px}.content-grid{grid-template-columns:1fr;gap:9px}.course-card{padding:9px;gap:11px}.course-art{width:88px;height:86px}.course-info h3{font-size:11px;margin:6px 0 8px}.course-info small{font-size:9px}.tag{font-size:9px;padding:4px 7px}.arrow-circle{width:25px;height:25px}.next-task-card{padding:12px;gap:9px}.next-task-copy b{font-size:11px}.next-task-copy span{font-size:9px}.next-task-card .button{padding:9px 10px;font-size:10px}.page-title-row{align-items:flex-start}.count-chip{font-size:9px;padding:8px 9px;margin-top:8px}.filter-row{margin:18px 0 12px}.filter-chip{padding:8px 12px;font-size:10px}.list-course{gap:10px;padding:10px}.list-cover{width:70px;height:75px}.list-course h3{font-size:11px;white-space:normal;margin:6px 0}.list-course small{font-size:9px}.list-course .status-pill{font-size:9px;padding:5px 7px}.lesson-layout{display:block}.lesson-main h1,.text-lesson-wrap h1{font-size:19px}.video-frame{height:235px;margin-top:17px}.lesson-aside{margin-top:12px}.lesson-aside>b{font-size:12px}.lesson-chapters{margin:8px 0}.lesson-chapters li{padding:8px;font-size:10px}.completion-tip{font-size:9px}.lesson-note{padding:12px}.reading-pages{height:56vh;min-height:300px}.reading-page{padding:21px 20px;min-height:610px}.reading-page h2{font-size:19px}.reading-page p{font-size:12px}.task-list,.exam-list{grid-template-columns:1fr}.task-card,.exam-card{padding:16px}.task-card h2,.exam-card h2{font-size:15px}.task-detail-card{padding:18px}.task-detail-card h1{font-size:20px}.task-meta,.exam-meta{font-size:9px}.exam-facts{gap:5px}.exam-facts span{font-size:9px;padding:8px}.view#view-exam-paper{padding:18px}.view#view-exam-paper h1{font-size:18px;line-height:1.5}.answer-option{padding:12px;font-size:12px}.answer-option span{font-size:11px}.paper-footer{align-items:flex-start;flex-direction:column;gap:12px}.paper-footer .button{width:100%}.score-breakdown{gap:12px;font-size:9px}.profile-card{gap:11px;padding:14px}.profile-avatar{width:47px;height:47px}.profile-card h1{font-size:17px}.profile-card p{font-size:9px}.profile-card .button{padding:8px;font-size:9px}.profile-stats{padding:14px 0}.profile-stats b{font-size:18px}.profile-stats small{font-size:9px}.bottom-nav{height:67px;position:fixed;z-index:6;left:0;right:0;bottom:0;display:flex;justify-content:space-around;align-items:center;background:#ffffffed;border-top:1px solid var(--line);padding-bottom:env(safe-area-inset-bottom);backdrop-filter:blur(16px)}.nav-item{height:53px;min-width:52px;position:relative;display:flex;flex-direction:column;justify-content:center;align-items:center;gap:2px;border:0;background:transparent;color:#9aa5b7;cursor:pointer}.nav-symbol{font-size:21px;line-height:22px}.nav-item small{font-size:9px}.nav-item.active{color:#2469e5}.nav-item.active .nav-symbol{font-weight:700}.nav-badge{position:absolute;top:3px;right:6px;min-width:15px;height:15px;display:grid;place-items:center;border-radius:10px;background:#ef7d69;color:white;font-style:normal;font-size:8px;border:1px solid white}.toast{bottom:81px}.result-card{margin:20px auto;padding:24px 17px}}
@media(min-width:761px) and (max-width:1000px){.main-content{padding-left:24px;padding-right:24px}.hero-art{margin-right:0;transform:scale(.82);transform-origin:center right}.course-art{width:100px}}
body.logged-out .top-context,body.logged-out .avatar,body.logged-out .bottom-nav{display:none}body.logged-out .main-content{min-height:calc(100vh - 74px);display:grid;place-items:center;padding-top:28px;padding-bottom:28px}.login-panel,.password-modal{width:min(100%,420px);background:#fff;border:1px solid var(--line);border-radius:22px;padding:34px;box-shadow:var(--shadow)}.login-panel{text-align:center}.login-mark,.modal-mark{width:54px;height:54px;margin:0 auto 19px;border-radius:17px;display:grid;place-items:center;background:linear-gradient(140deg,#2bb5ee,#2763e8);box-shadow:0 10px 20px #2a70dd2e;color:white;font-size:29px}.login-panel h1,.password-modal h2{font-size:24px;margin:0 0 8px}.login-panel>.muted,.password-modal>.muted{font-size:11px;margin-bottom:23px}.login-field{display:grid;gap:7px;text-align:left;margin-bottom:14px}.login-field span{font-size:10px;color:#6f7d95}.login-field input{height:43px;width:100%;border:1px solid #e3eaf4;border-radius:9px;padding:0 12px;font:12px inherit;color:var(--ink);outline:none}.login-field input:focus{border-color:#70a0ee;box-shadow:0 0 0 3px #eaf2ff}.login-help{display:block;color:#9aa5b5;font-size:9px;margin-top:15px;line-height:1.6}.login-footer{border-top:1px solid #eff2f6;margin-top:23px;padding-top:14px;color:#8c99ad;font-size:10px}.modal-backdrop{position:fixed;z-index:12;inset:0;background:#17284671;display:grid;place-items:center;padding:18px}.modal-backdrop.hidden{display:none}.password-modal{text-align:center}.password-modal .login-field{text-align:left}.password-modal .button{width:100%}
@media(max-width:760px){body.logged-out .main-content{min-height:calc(100vh - 58px);padding:18px}.login-panel,.password-modal{padding:27px 21px;border-radius:18px}.login-panel h1,.password-modal h2{font-size:21px}.modal-backdrop{align-items:center}}
.desktop-nav{display:flex;align-items:center;gap:4px}.desktop-nav button{border:0;background:transparent;color:#8390a5;padding:9px 12px;border-radius:8px;font:600 11px 'Microsoft YaHei','PingFang SC','Segoe UI',sans-serif;cursor:pointer}.desktop-nav button:hover,.desktop-nav button.active{background:#edf4ff;color:#286be4}body.logged-out .desktop-nav{display:none}
@media(max-width:760px){.desktop-nav{display:none}.topbar{justify-content:space-between}}
:root{--ink:#1a2333;--muted:#6b7a90;--line:#e8edf3;--blue:#2b6ce5;--bg:#eff3fa}body{font-size:14px;background:var(--bg)}.main-content{max-width:1190px;padding:32px 28px 88px}.muted{font-size:14px;color:var(--muted)}.button{font-size:14px;padding:12px 18px;min-height:44px;border-radius:12px}.button-ghost,.button-white{font-size:14px}.tag{font-size:12px;padding:6px 10px}.welcome-row h1,.page-title-row h1,.login-panel h1{font-size:24px}.section-heading h2{font-size:20px}.stat-card{padding:20px;border-radius:16px;box-shadow:0 1px 3px rgba(0,0,0,.04),0 4px 12px rgba(0,0,0,.04)}.stat-card small,.count-chip,.streak-pill{font-size:12px}.stat-card b{font-size:27px}.course-card,.list-course,.task-card,.exam-card,.profile-card,.profile-links,.task-detail-card,.result-card{padding:20px;border-radius:16px;box-shadow:0 1px 3px rgba(0,0,0,.04),0 4px 12px rgba(0,0,0,.04)}.course-info h3,.list-course h3{font-size:15px}.course-info small,.list-course small,.status-pill,.filter-chip,.task-meta,.exam-meta,.fine-print,.login-help,.login-field span,.login-footer{font-size:12px}.course-list,.task-list,.exam-list{gap:16px}.content-grid{gap:16px}.filter-chip{padding:10px 16px}.lesson-main h1,.text-lesson-wrap h1{font-size:22px}.reading-page p{font-size:14px;line-height:1.9}.reading-page h2{font-size:20px}.reading-pages{border-radius:16px}.login-panel,.password-modal{box-shadow:0 1px 3px rgba(0,0,0,.04),0 4px 12px rgba(0,0,0,.04)}.login-field input{font-size:14px;padding:0 14px}.login-panel>.muted,.password-modal>.muted{font-size:14px}.profile-stats b{font-size:25px}.profile-stats small,.profile-links button{font-size:13px}.nav-item small{font-size:12px}.nav-item{min-height:56px}.reading-page .scroll-hint{font-size:12px}.learning-empty{padding:28px;text-align:center;color:var(--muted);font-size:14px;background:#fff;border-radius:16px}@media(max-width:760px){.main-content{padding:22px 16px 108px}.welcome-row h1,.page-title-row h1{font-size:22px}.welcome-row .muted,.hero-card p,.course-info small,.task-meta,.exam-meta{font-size:12px}.hero-card{padding:24px 20px}.stat-grid{gap:8px}.stat-card{padding:14px 9px}.stat-card small{font-size:11px}.stat-card b{font-size:22px}.content-grid{gap:12px}.course-card{padding:14px 12px}.course-info h3,.list-course h3{font-size:14px}.list-course{padding:14px 12px}.list-course .status-pill{font-size:11px}.task-card,.exam-card{padding:18px}.reading-pages{height:56vh}.reading-page{padding:20px 18px}.reading-page p{font-size:14px}.profile-card{padding:16px}.profile-card p{font-size:12px}.profile-card .button{font-size:12px}.toast{font-size:13px}.login-panel,.password-modal{padding:28px 22px}}

.task-instructions{margin:20px 0;padding:16px 18px;background:#f5f8fe;border:1px solid #e6edfa;border-radius:12px}.task-instructions ol{margin:10px 0 0;padding-left:22px;color:#43536c;line-height:1.8}.task-instructions li+li{margin-top:5px}.task-old-evidence{margin:16px 0}.task-old-evidence>b{display:block;margin-bottom:10px}.upload-zone{display:flex;flex-direction:column;align-items:center;gap:8px;padding:22px 16px;border:1.5px dashed #9ab8ef;border-radius:14px;background:#f8faff;text-align:center;cursor:pointer}.upload-zone:hover{background:#f0f6ff;border-color:var(--blue)}.upload-zone input{position:absolute;width:1px;height:1px;opacity:0;pointer-events:none}.upload-zone small{color:var(--muted);font-size:12px}.upload-icon{width:38px;height:38px;display:grid;place-items:center;border-radius:12px;background:#e7f0ff;color:var(--blue);font-size:25px}.task-detail-card .success-banner{margin-top:18px}.task-detail-card #task-submit-button{margin-top:12px}.result-card .callout{margin:14px 0;padding:12px;border-radius:10px;background:#fff4ed;color:#a75530;font-size:13px}
/* Runtime navigation visibility overrides the default bottom tab layout. */
.nav-item[hidden],.desktop-nav button[hidden]{display:none!important}
.nav-badge[hidden]{display:none!important}