:root {
  --brand: #1677ff;
  --brand-dark: #0b53c7;
  --live: #e53935;
  --ink: #0d1b2a;
  --muted: #657386;
  --line: #dde4ec;
  --soft: #f4f7fa;
  --navy: #07111f;
  --panel: #0d1a2b;
  --white: #fff;
  --radius: 14px;
  --shadow: 0 14px 40px rgba(8, 24, 44, .09);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: #fff; font: 14px/1.65 "Microsoft YaHei", "PingFang SC", Arial, sans-serif; -webkit-font-smoothing: antialiased; }
button, input, select { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
button { cursor: pointer; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
[hidden] { display: none !important; }
svg { width: 1.2em; height: 1.2em; fill: currentColor; }
.shell { width: min(1440px, calc(100% - 48px)); margin-inline: auto; }

.topbar { position: sticky; top: 0; z-index: 50; height: 76px; background: rgba(255,255,255,.97); border-bottom: 1px solid #e6ebf0; backdrop-filter: blur(16px); }
.topbar-inner { width: min(1500px, calc(100% - 40px)); height: 100%; margin: auto; display: flex; align-items: center; gap: 34px; }
.brand { min-width: 360px; display: flex; align-items: center; gap: 13px; }
.brand-logo { width: 62px; height: 46px; display: grid; place-items: center; overflow: hidden; }
.brand-logo img { width: 64px; height: 44px; object-fit: contain; mix-blend-mode: multiply; }
.brand-mark { display: none; }
.brand-text { display: flex; flex-direction: column; min-width: 0; line-height: 1.25; }
.brand-text b { font-size: 16px; letter-spacing: .02em; white-space: nowrap; }
.brand-text small { margin-top: 5px; color: #7b8999; font-size: 9px; letter-spacing: .15em; }
.main-nav { flex: 1; display: flex; align-self: stretch; justify-content: center; gap: 34px; }
.main-nav a { position: relative; display: grid; place-items: center; color: #4a5868; font-size: 14px; }
.main-nav a:hover, .main-nav a.active { color: var(--brand); }
.main-nav a.active::after { position: absolute; left: 20%; right: 20%; bottom: 0; height: 3px; content: ""; background: var(--brand); }
.top-share { height: 38px; padding: 0 16px; display: flex; align-items: center; gap: 7px; color: #243248; background: #fff; border: 1px solid #cfd7e2; border-radius: 7px; }
.top-share:hover { color: var(--brand); border-color: var(--brand); }
.logout-btn { padding-inline: 12px; }

.hero { padding: 42px 0 50px; color: white; background: var(--navy); }
.hero-intro { margin-bottom: 24px; display: flex; align-items: end; justify-content: space-between; gap: 30px; }
.eyebrow, .section-heading > span, .section-heading > div > span, .reservation-copy > span, .company-card > div > span { color: #52a0ff; font-size: 11px; font-weight: 700; letter-spacing: .18em; }
.hero-intro h1 { margin: 7px 0 2px; font-size: clamp(25px, 2.25vw, 36px); line-height: 1.3; letter-spacing: .01em; }
.hero-intro p { margin: 0; color: #93a3b8; font-size: 15px; }
.class-status { flex: none; display: flex; align-items: center; gap: 14px; }
.live-chip { display: inline-flex; align-items: center; gap: 8px; min-height: 34px; padding: 0 13px; color: #fff; background: var(--live); border-radius: 4px; font-size: 13px; font-weight: 700; }
.live-chip.off { background: #536174; }
.dot { width: 7px; height: 7px; display: inline-block; border-radius: 50%; background: currentColor; box-shadow: 0 0 0 4px rgba(255,255,255,.14); }
.course-count { color: #9dacbd; white-space: nowrap; }
.course-count b { color: #fff; }

.classroom-grid { display: grid; grid-template-columns: minmax(0, 7fr) minmax(330px, 3fr); gap: 18px; align-items: stretch; }
.player-col { min-width: 0; }
.lesson-kicker { min-height: 58px; padding: 0 16px; display: flex; align-items: center; gap: 11px; background: #101d2d; border: 1px solid #1e3045; border-bottom: 0; border-radius: 10px 10px 0 0; }
.lesson-kicker span { flex: none; padding: 3px 8px; color: #9ac5ff; border: 1px solid #315b8c; border-radius: 3px; font-size: 11px; }
.lesson-kicker strong { flex: 1; overflow: hidden; font-size: 15px; text-overflow: ellipsis; white-space: nowrap; }
.lesson-kicker small { color: #8292a7; white-space: nowrap; }
.lesson-kicker small b { color: #bec8d4; font-weight: 500; }
.video-card { position: relative; aspect-ratio: 16 / 9; overflow: hidden; background: #02060b; border: 1px solid #1e3045; }
.video-card video { width: 100%; height: 100%; display: block; object-fit: contain; background: #000; }
.standby, .video-error { position: absolute; inset: 0; z-index: 5; display: grid; place-items: center; background: #08121f; text-align: center; }
.standby-inner { max-width: 540px; padding: 35px; }
.standby-badge { width: max-content; margin: 0 auto 15px; padding: 5px 12px; color: #a6ccff; border: 1px solid #2c5c95; border-radius: 4px; font-size: 12px; font-weight: 700; letter-spacing: .12em; }
.standby h2, .video-error b { margin: 0 0 9px; color: white; font-size: 23px; }
.standby p, .video-error small { margin: 0; color: #8b9bad; }
.video-error { padding: 28px; }
.video-error svg { width: 42px; height: 42px; color: #e8b14f; }
.video-error p { margin: 10px 0 3px; }
.overlay-top { position: absolute; z-index: 4; top: 16px; left: 16px; display: flex; gap: 8px; }
.badge-live, .badge-soft { min-height: 28px; padding: 0 10px; display: inline-flex; align-items: center; gap: 7px; color: #fff; background: rgba(4,10,18,.78); border: 1px solid rgba(255,255,255,.14); border-radius: 4px; font-size: 11px; font-weight: 700; }
.badge-live { background: rgba(213,40,40,.92); border-color: transparent; }
.overlay-announce { position: absolute; z-index: 5; left: 18px; right: 18px; bottom: 62px; padding: 9px 12px; display: flex; gap: 10px; color: #dbe8f7; background: rgba(4,13,24,.9); border-left: 3px solid var(--brand); font-size: 12px; }
.announce-tag { color: #77b2ff; font-weight: 700; }
.watermark { position: absolute; z-index: 3; inset: 0; overflow: hidden; pointer-events: none; }
.watermark span { position: absolute; color: rgba(255,255,255,.09); font-size: 11px; transform: rotate(-18deg); white-space: nowrap; }
.big-play { position: absolute; z-index: 6; top: 50%; left: 50%; width: 62px; height: 62px; display: grid; place-items: center; color: white; background: rgba(7,17,31,.8); border: 1px solid rgba(255,255,255,.35); border-radius: 50%; transform: translate(-50%,-50%); }
.big-play svg { width: 28px; height: 28px; margin-left: 4px; }
.vp-bar { position: absolute; z-index: 8; left: 0; right: 0; bottom: 0; height: 50px; padding: 0 13px; display: flex; align-items: center; gap: 10px; background: rgba(0,0,0,.82); transition: opacity .2s; }
.vp-btn { width: 32px; height: 32px; padding: 0; display: grid; place-items: center; color: #fff; background: transparent; border: 0; }
.vp-btn svg { width: 20px; height: 20px; }
.vp-track { position: relative; flex: 1; height: 4px; cursor: pointer; background: #59616b; border-radius: 3px; }
.vp-buffer, .vp-played { position: absolute; inset: 0 auto 0 0; width: 0; border-radius: inherit; }
.vp-buffer { background: #86909b; }.vp-played { background: var(--brand); }
.vp-knob { position: absolute; top: 50%; left: 0; width: 12px; height: 12px; background: #fff; border: 3px solid var(--brand); border-radius: 50%; transform: translate(-50%,-50%); }
.vp-time { color: #d0d5dc; font: 11px/1.2 Arial, sans-serif; white-space: nowrap; }
.vp-select { height: 26px; color: #fff; background: transparent; border: 0; font-size: 11px; }.vp-select option { color: #111; }
.playback-note { min-height: 76px; padding: 14px 18px; display: flex; align-items: center; gap: 13px; background: #101d2d; border: 1px solid #1e3045; border-top: 0; border-radius: 0 0 10px 10px; }
.note-icon { width: 32px; height: 32px; display: grid; place-items: center; color: #83baff; background: #172b43; border-radius: 50%; font-size: 10px; }
.playback-note div { flex: 1; }.playback-note b { display: block; font-size: 13px; }.playback-note p { margin: 2px 0 0; color: #899aaf; font-size: 12px; }.playback-note > span:last-child { color: #7eaded; white-space: nowrap; font-size: 12px; }

.interaction-card { min-width: 0; display: grid; grid-template-rows: auto auto minmax(230px, 1fr) auto; overflow: hidden; background: var(--panel); border: 1px solid #1e3045; border-radius: 10px; }
.interaction-head { min-height: 72px; padding: 14px 17px; display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid #203047; }
.interaction-head small { color: #667f9d; font-size: 9px; letter-spacing: .14em; }.interaction-head h2 { margin: 2px 0 0; font-size: 18px; }.connection-dot { position: relative; padding-left: 14px; color: #62cb90; font-size: 11px; }.connection-dot::before { position: absolute; top: 7px; left: 0; width: 6px; height: 6px; content: ""; background: #39bf75; border-radius: 50%; }
.side-tabs { display: grid; grid-template-columns: 1fr 1fr; border-bottom: 1px solid #203047; }
.stab { height: 46px; color: #8293a8; background: transparent; border: 0; border-bottom: 2px solid transparent; }.stab.active { color: #fff; border-bottom-color: var(--brand); }
.panel { min-height: 0; display: none; overflow-y: auto; }.panel.active { display: block; }
.welcome-message { margin: 15px; padding: 13px; color: #9aabc0; background: #132237; border-left: 3px solid var(--brand); font-size: 12px; }.welcome-message b { color: #d9e7f6; }.welcome-message p { margin: 3px 0 0; }
.pinned { margin: 10px 15px; padding: 9px 11px; display: flex; gap: 8px; color: #c9d6e5; background: #172940; border-radius: 5px; font-size: 12px; }.pinned p { margin: 0; }.pin-tag { color: #f6b84a; flex: none; }
.chat-list { min-height: 180px; padding: 4px 15px 18px; }
.empty-chat { padding: 28px 10px; color: #566b83; text-align: center; }.empty-chat span { font-size: 12px; }
.msg { margin: 11px 0; display: flex; align-items: flex-start; gap: 9px; }.msg .avatar { width: 30px; height: 30px; flex: none; display: grid; place-items: center; color: #fff; border-radius: 50%; font-size: 12px; }.msg .body { min-width: 0; }.msg .name { margin-bottom: 3px; color: #70849b; font-size: 10px; }.msg .bubble { display: inline-block; padding: 7px 10px; color: #d3deeb; background: #17263a; border-radius: 3px 9px 9px 9px; font-size: 12px; word-break: break-word; }.msg.mine { flex-direction: row-reverse; }.msg.mine .body { text-align: right; }.msg.mine .bubble { color: white; background: #155fbd; border-radius: 9px 3px 9px 9px; }.msg.system, .msg.join, .msg.mic { display: block; text-align: center; }.msg.system .bubble, .msg.join .bubble, .msg.mic .bubble { color: #6f8298; background: transparent; font-size: 11px; }.tag { margin-left: 4px; color: #73b1ff; }.tag.teacher { color: #f3bd5a; }
.announcement-panel { padding: 18px 16px; }.notice-card { margin-bottom: 12px; padding: 14px; display: flex; gap: 12px; color: #b7c5d5; background: #142339; border: 1px solid #233750; border-radius: 7px; }.notice-card span { color: #6eaaff; font: 700 11px Arial; }.notice-card p { margin: 0; font-size: 12px; }
.chat-input { padding: 12px 14px 13px; border-top: 1px solid #203047; background: #0b1726; }
.quick { max-height: 27px; margin-bottom: 8px; display: flex; gap: 6px; overflow: hidden; }.qchip { flex: none; max-width: 145px; padding: 4px 8px; overflow: hidden; color: #8296ad; background: #14243a; border: 0; border-radius: 3px; font-size: 10px; text-overflow: ellipsis; white-space: nowrap; }
.input-row { display: flex; gap: 7px; }.input-row input { width: 100%; height: 40px; padding: 0 11px; color: #fff; background: #111f32; border: 1px solid #283b52; border-radius: 5px; outline: none; }.input-row input:focus { border-color: #3c8cf0; }.input-row input::placeholder { color: #5f7186; }.send { width: 62px; flex: none; color: #fff; background: var(--brand); border: 0; border-radius: 5px; font-weight: 700; }
.input-foot { margin-top: 9px; display: flex; align-items: center; gap: 8px; }.raise-hand, .tiny { min-height: 30px; padding: 0 10px; color: #9fb1c5; background: transparent; border: 1px solid #2b3e56; border-radius: 4px; font-size: 11px; }.raise-hand { display: flex; align-items: center; gap: 5px; }.raise-hand:hover, .tiny:hover { color: #fff; border-color: #4b6f98; }

.announcement-strip { background: #f7f9fc; border-bottom: 1px solid #e3e8ee; }.announcement-strip .shell { min-height: 64px; display: flex; align-items: center; gap: 16px; }.announcement-label { padding: 4px 10px; flex: none; color: #fff; background: var(--live); border-radius: 3px; font-size: 11px; font-weight: 700; }.announcement-strip p { flex: 1; margin: 0; color: #263446; }.announcement-time { color: #8b96a5; font-size: 11px; }
.content-section { padding-top: 74px; padding-bottom: 74px; }.content-section.soft { max-width: none; background: var(--soft); }.section-heading { margin-bottom: 30px; }.section-heading h2 { margin: 5px 0 0; font-size: clamp(25px, 2.2vw, 34px); line-height: 1.35; }.section-heading.split { display: flex; justify-content: space-between; align-items: end; }.section-heading.split p { margin: 0 0 7px; color: var(--muted); }
.overview-grid { display: grid; grid-template-columns: 1.18fr .82fr; gap: 28px; }.overview-copy { position: relative; padding: 34px 38px; border: 1px solid var(--line); box-shadow: var(--shadow); }.lesson-index { color: var(--brand); font-size: 12px; font-weight: 700; letter-spacing: .08em; }.lesson-index b { font-size: 21px; }.overview-copy h3 { margin: 13px 0 14px; font-size: 25px; line-height: 1.4; }.overview-copy > p { margin: 0; color: #536174; font-size: 15px; }.teacher-line { margin-top: 27px; padding-top: 22px; display: flex; align-items: center; gap: 11px; border-top: 1px solid var(--line); }.teacher-avatar { width: 40px; height: 40px; display: grid; place-items: center; color: white; background: var(--brand); border-radius: 50%; font-weight: 700; }.teacher-line > div:nth-child(2) { display: flex; flex: 1; flex-direction: column; }.teacher-line small { color: var(--muted); }.duration-pill { padding: 4px 10px; color: #566477; background: #eef3f8; border-radius: 4px; font-size: 11px; }
.goal-card { padding: 34px; color: #fff; background: #0c1c2f; }.goal-card-head { display: flex; align-items: center; gap: 14px; }.goal-card-head > span { width: 40px; height: 40px; display: grid; place-items: center; color: #fff; background: var(--brand); border-radius: 50%; font-size: 18px; }.goal-card-head small { color: #6385ad; font-size: 9px; letter-spacing: .16em; }.goal-card-head h3 { margin: 2px 0 0; font-size: 21px; }.points { margin: 24px 0 0; padding: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 11px 18px; list-style: none; }.points li { position: relative; padding: 11px 11px 11px 31px; color: #bdc9d8; background: #12263e; font-size: 13px; }.points li::before { position: absolute; left: 12px; content: "✓"; color: #5ca4ff; font-weight: 700; }
.task-card { display: flex; align-items: center; justify-content: space-between; gap: 34px; padding: 28px 30px; background: white; border: 1px solid var(--line); box-shadow: var(--shadow); }.task-main { display: flex; align-items: center; gap: 22px; }.task-number { color: #d7e3f0; font: 700 46px/1 Arial; }.task-main small { color: var(--brand); font-weight: 700; letter-spacing: .12em; }.task-main h3 { margin: 3px 0 4px; font-size: 19px; }.task-main p { margin: 0; color: var(--muted); }.task-actions { flex: none; display: flex; gap: 9px; align-items: center; }
.btn { min-height: 42px; padding: 0 17px; display: inline-flex; align-items: center; justify-content: center; border-radius: 5px; border: 1px solid transparent; font-weight: 600; }.btn.primary { color: #fff; background: var(--brand); }.btn.primary:hover { background: var(--brand-dark); }.btn.secondary { color: #2f4156; background: #fff; border-color: #cfd8e3; }.text-btn { color: var(--brand); background: transparent; }.full { width: 100%; }
.catalog { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }.cat-item { position: relative; min-height: 170px; padding: 24px 23px; overflow: hidden; background: #fff; border: 1px solid var(--line); transition: transform .18s, border-color .18s, box-shadow .18s; }.cat-item:hover { border-color: #9cc5f8; box-shadow: var(--shadow); transform: translateY(-3px); }.cat-item.current { color: #fff; background: #0c1c2f; border-color: #0c1c2f; }.cat-item .num { color: #cad5e1; font: 700 32px/1 Arial; }.cat-item.current .num { color: #3c7fce; }.cat-title { margin: 19px 0 14px; font-size: 16px; font-weight: 700; line-height: 1.5; }.cat-meta { display: flex; align-items: center; gap: 8px; color: #8592a1; font-size: 11px; }.cat-state { margin-left: auto; padding: 3px 7px; color: #7e8a98; background: #eef2f6; border-radius: 3px; }.cat-state.playing { color: #fff; background: var(--live); }.cat-item.current .cat-meta { color: #8198b2; }.cat-item.current .cat-state.playing { background: var(--live); }
.next-section { padding: 50px 0; background: #eef3f8; }.next-grid { display: grid; grid-template-columns: 220px 1fr; gap: 26px; align-items: center; }.next-label span { color: var(--brand); font-size: 10px; font-weight: 700; letter-spacing: .17em; }.next-label h2 { margin: 5px 0 0; font-size: 30px; }.next-card { padding: 24px 28px; display: flex; align-items: center; gap: 20px; background: #fff; border-left: 4px solid var(--brand); box-shadow: 0 8px 28px rgba(13,42,75,.07); }.next-order { color: #b7c8d9; font: 700 34px Arial; }.next-card > div { flex: 1; }.next-card small { color: var(--brand); font-weight: 700; }.next-card h3 { margin: 3px 0; font-size: 18px; }.next-card p { margin: 0; color: var(--muted); font-size: 12px; }
.reservation { display: grid; grid-template-columns: 1fr 480px; gap: 80px; align-items: center; }.reservation-copy h2 { margin: 7px 0 13px; font-size: 34px; }.reservation-copy p { color: #596779; font-size: 15px; }.reservation-copy ul { margin: 22px 0 0; padding: 0; display: flex; gap: 26px; color: #24364b; list-style: none; }.reservation-copy li::before { margin-right: 7px; content: "✓"; color: var(--brand); font-weight: 700; }.reservation-form { padding: 30px; background: #f4f7fa; border: 1px solid #dce4ec; }.field { margin-bottom: 15px; }.field label { margin-bottom: 5px; display: block; color: #435166; font-size: 12px; font-weight: 700; }.field input { width: 100%; height: 46px; padding: 0 13px; background: white; border: 1px solid #ced7e1; border-radius: 4px; outline: none; }.field input:focus { border-color: var(--brand); box-shadow: 0 0 0 3px rgba(22,119,255,.1); }.form-tip { margin: 10px 0 0; color: #8b96a4; text-align: center; font-size: 10px; }.form-success { margin-top: 12px; padding: 11px; color: #197642; background: #eaf8f0; border: 1px solid #bfe7d0; text-align: center; font-size: 12px; }
.program-section { padding: 78px 0; color: #fff; background: #081523; }.section-heading.light { text-align: center; }.section-heading.light > span { color: #5a92d6; }.section-heading.light p { margin: 10px auto 0; color: #99a9bc; font-size: 16px; }.program-grid { margin-top: 42px; display: grid; grid-template-columns: repeat(6, 1fr); border: 1px solid #20354e; }.program-grid > div { min-height: 135px; padding: 23px 18px; display: flex; flex-direction: column; gap: 19px; border-right: 1px solid #20354e; }.program-grid > div:last-child { border-right: 0; }.program-grid b { color: #3c79bd; font: 700 24px Arial; }.program-grid span { color: #cfdae7; font-size: 13px; }.program-section blockquote { margin: 30px auto 0; color: #78b2f4; text-align: center; font-size: 17px; font-weight: 700; }
.company-section { display: grid; grid-template-columns: 1.2fr .8fr; gap: 26px; }.company-card, .resource-card { padding: 32px; border: 1px solid var(--line); }.company-card { display: flex; align-items: center; gap: 28px; }.company-card img { width: 145px; height: 110px; object-fit: contain; mix-blend-mode: multiply; }.company-card h2 { margin: 4px 0 9px; font-size: 23px; }.company-card p { margin: 0; color: var(--muted); }.contact-row { margin-top: 17px; display: flex; gap: 22px; color: #58677a; font-size: 12px; }.resource-card small { color: var(--brand); font-weight: 700; letter-spacing: .15em; }.resource-card h3 { margin: 3px 0 15px; font-size: 20px; }.materials { display: grid; gap: 8px; }.mat-item { min-height: 46px; padding: 8px 11px; display: flex; align-items: center; gap: 9px; background: #f4f7fa; border: 1px solid #e0e7ee; }.mat-item svg { color: var(--brand); }.mat-name { flex: 1; font-weight: 600; }.mat-size { color: #8491a0; font-size: 11px; }.panel-tip { color: var(--muted); }
footer { padding: 27px 0; color: #8c9bad; background: #06101c; border-top: 1px solid #18283a; }.footer-inner { display: flex; align-items: center; justify-content: space-between; gap: 30px; }.footer-brand { display: flex; align-items: center; gap: 12px; }.footer-brand img { width: 58px; height: 40px; object-fit: contain; filter: brightness(1.5); }.footer-brand div { display: flex; flex-direction: column; }.footer-brand b { color: #d1dce8; }.footer-brand small { font-size: 9px; letter-spacing: .12em; }.footer-links { display: flex; gap: 24px; font-size: 12px; }.footer-links a:hover { color: #fff; }

.modal { position: fixed; z-index: 100; inset: 0; display: grid; place-items: center; }.modal-mask { position: absolute; inset: 0; background: rgba(2,8,14,.72); }.modal-card { position: relative; width: min(460px, calc(100% - 32px)); padding: 28px; background: white; box-shadow: 0 24px 70px rgba(0,0,0,.3); }.modal-card h3 { margin: 0; font-size: 21px; }.modal-sub { color: var(--muted); }.copy-row { display: flex; gap: 7px; }.copy-row input { min-width: 0; flex: 1; padding: 0 10px; border: 1px solid #ccd5df; }.qr { width: 168px; height: 168px; margin: 20px auto; }.qr img { width: 100%; height: 100%; }.qr-fallback { height: 100%; display: grid; place-items: center; color: var(--muted); background: var(--soft); text-align: center; }.toast-wrap { position: fixed; z-index: 120; right: 24px; bottom: 24px; display: grid; gap: 8px; }.toast { max-width: 360px; padding: 11px 16px; color: white; background: #172334; border-left: 4px solid var(--brand); box-shadow: 0 8px 28px rgba(0,0,0,.22); }.toast.warn { border-color: #f0a52b; }.toast.ok { border-color: #38b36a; }
.mic-invite { position: absolute; z-index: 12; inset: 0; display: grid; place-items: center; background: rgba(1,7,13,.76); }.mic-invite-card { width: min(470px, calc(100% - 30px)); padding: 20px; display: flex; align-items: center; gap: 14px; color: #172334; background: #fff; }.mic-avatar { width: 45px; height: 45px; flex: none; display: grid; place-items: center; color: #fff; background: var(--brand); border-radius: 50%; }.mic-invite-card > div:nth-child(2) { flex: 1; display: flex; flex-direction: column; }.mic-invite-card small { color: var(--muted); }.mic-invite-actions { display: flex; gap: 7px; }.heart { position: absolute; bottom: 35px; z-index: 11; font-size: 22px; animation: heartFly 2.7s ease-out forwards; }.like-layer { position: absolute; inset: 0; pointer-events: none; }.danmaku { position: absolute; z-index: 2; inset: 40px 0 70px; overflow: hidden; pointer-events: none; }.d-item { position: absolute; left: 100%; padding: 4px 8px; color: #fff; background: rgba(0,0,0,.36); border-radius: 3px; white-space: nowrap; animation: danmaku linear forwards; }.d-name { margin-right: 6px; color: #65b1ff; }
@keyframes heartFly { from { opacity: 1; transform: translateY(0) scale(.8); } to { opacity: 0; transform: translateY(-190px) scale(1.35) rotate(12deg); } }
@keyframes danmaku { to { transform: translateX(calc(-100vw - 100%)); } }

@media (max-width: 1180px) {
  .brand { min-width: 300px; }.main-nav { gap: 18px; }.classroom-grid { grid-template-columns: minmax(0, 1fr) 350px; }.catalog { grid-template-columns: repeat(2, 1fr); }.task-card { align-items: flex-start; flex-direction: column; }.task-actions { flex-wrap: wrap; }.reservation { gap: 42px; }.program-grid { grid-template-columns: repeat(3, 1fr); }.program-grid > div:nth-child(3) { border-right: 0; }.program-grid > div:nth-child(-n+3) { border-bottom: 1px solid #20354e; }
}

@media (max-width: 900px) {
  .shell { width: min(100% - 30px, 720px); }.topbar { height: 66px; }.topbar-inner { width: calc(100% - 24px); }.brand { min-width: 0; flex: 1; }.brand-logo { width: 52px; }.brand-text b { max-width: 245px; overflow: hidden; text-overflow: ellipsis; }.main-nav { display: none; }.top-share { width: 38px; padding: 0; justify-content: center; font-size: 0; }.logout-btn { width: auto; padding-inline: 10px; font-size: 12px; }.hero { padding-top: 27px; }.hero-intro { align-items: flex-start; flex-direction: column; }.class-status { width: 100%; justify-content: space-between; }.classroom-grid { grid-template-columns: 1fr; }.interaction-card { min-height: 580px; }.lesson-kicker { flex-wrap: wrap; padding-block: 10px; }.lesson-kicker small { width: 100%; }.overview-grid, .reservation, .company-section { grid-template-columns: 1fr; }.next-grid { grid-template-columns: 1fr; }.next-card { align-items: flex-start; flex-wrap: wrap; }.next-card .btn { margin-left: 56px; }.task-actions { width: 100%; }.reservation-copy ul { flex-direction: column; gap: 7px; }.company-card { align-items: flex-start; }.section-heading.split { align-items: flex-start; flex-direction: column; }.section-heading.split p { margin-top: 8px; }
}

@media (max-width: 620px) {
  .shell { width: calc(100% - 24px); }.topbar-inner { gap: 10px; }.brand-logo { width: 46px; height: 36px; }.brand-logo img { width: 50px; height: 35px; }.brand-text b { max-width: 220px; font-size: 13px; }.brand-text small { display: none; }.hero { padding: 23px 0 32px; }.hero-intro h1 { font-size: 23px; }.hero-intro p { margin-top: 7px; font-size: 13px; }.live-chip { min-height: 30px; }.lesson-kicker strong { width: calc(100% - 90px); flex: none; white-space: normal; }.video-card { aspect-ratio: 16 / 10; }.overlay-top { top: 8px; left: 8px; }.badge-soft:last-child { display: none; }.vp-bar { height: 44px; gap: 5px; padding-inline: 6px; }.vp-time { display: none; }.playback-note { align-items: flex-start; }.playback-note > span:last-child { display: none; }.interaction-card { min-height: 550px; }.announcement-strip .shell { align-items: flex-start; padding-block: 14px; }.announcement-time { display: none; }.content-section { padding-top: 54px; padding-bottom: 54px; }.overview-copy, .goal-card, .reservation-form, .company-card, .resource-card { padding: 24px 20px; }.overview-copy h3 { font-size: 21px; }.points { grid-template-columns: 1fr; }.teacher-line { flex-wrap: wrap; }.duration-pill { margin-left: 51px; }.task-card { padding: 22px 18px; }.task-main { align-items: flex-start; gap: 13px; }.task-number { font-size: 33px; }.task-actions { display: grid; grid-template-columns: 1fr; }.catalog { grid-template-columns: 1fr; }.cat-item { min-height: 150px; }.next-card { padding: 22px 18px; }.next-order { font-size: 29px; }.next-card > div { min-width: calc(100% - 60px); }.next-card .btn { width: 100%; margin-left: 0; }.reservation-copy h2 { font-size: 28px; }.program-section { padding: 60px 0; }.program-grid { grid-template-columns: repeat(2, 1fr); }.program-grid > div:nth-child(2n) { border-right: 0; }.program-grid > div:nth-child(3) { border-right: 1px solid #20354e; }.program-grid > div:nth-child(-n+4) { border-bottom: 1px solid #20354e; }.program-section blockquote { font-size: 14px; }.company-card { flex-direction: column; }.company-card img { width: 112px; height: 78px; }.contact-row { align-items: flex-start; flex-direction: column; gap: 5px; }.footer-inner, .footer-links { align-items: flex-start; flex-direction: column; }.footer-links { gap: 8px; }.copy-row { flex-direction: column; }.copy-row input { height: 42px; }
}

@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; } }

@media (max-width: 900px) {
  .top-share svg { width: 18px; height: 18px; }
}

@media (max-width: 620px) {
  .overlay-announce { display: none; }
}

/* 学员登录与单点登录提示 */
.student-gate{position:fixed;inset:0;z-index:9999;display:grid;place-items:center;padding:24px;background:radial-gradient(circle at 50% 5%,rgba(22,119,255,.16),transparent 34%),#07111f}
.student-gate[hidden]{display:none}
.student-login-card{width:min(460px,100%);padding:38px;border:1px solid rgba(255,255,255,.12);border-radius:24px;background:rgba(12,25,43,.97);box-shadow:0 28px 80px rgba(0,0,0,.45);color:#fff}
.student-login-card>img{width:74px;height:54px;object-fit:contain;object-position:left center;margin-bottom:14px}
.student-login-card h1{margin:6px 0 10px;font-size:26px;line-height:1.28}
.student-login-card>p{margin:0 0 24px;color:#9eb0c8;line-height:1.75}
.student-login-card .gate-kicker{margin:0;color:#59a4ff;font-size:12px;letter-spacing:.14em}
.student-login-card label{display:grid;gap:8px;margin:14px 0;color:#dce8f7;font-size:14px}
.student-login-card input{height:48px;border:1px solid rgba(255,255,255,.18);border-radius:12px;padding:0 14px;background:#101e32;color:#fff;font:inherit;outline:none}
.student-login-card input:focus{border-color:#1677ff;box-shadow:0 0 0 3px rgba(22,119,255,.16)}
.student-login-card .btn{height:50px;margin-top:12px}
.gate-error{margin-top:14px;padding:10px 12px;border-radius:10px;background:rgba(255,77,79,.12);color:#ff9c9d;font-size:13px;line-height:1.5}
@media(max-width:520px){.student-gate{padding:16px}.student-login-card{padding:28px 22px;border-radius:20px}.student-login-card h1{font-size:22px}}