:root{--bg:#f7efe2;--panel:rgba(255,248,239,.82);--ink:#1d2a3a;--muted:#6d7684;--line:rgba(46,61,80,.12);--subject-english:#0c7c59;--subject-politics:#c4542a;--subject-pedagogy:#3659c9;--subject-852:#7b4cc2;--shadow:0 24px 80px rgba(49,41,28,.18)}*{box-sizing:border-box}body,html{margin:0;min-height:100%;background:radial-gradient(circle at top left,rgba(255,214,143,.45),transparent 28%),radial-gradient(circle at top right,rgba(111,168,255,.22),transparent 24%),linear-gradient(180deg,#f8f2e8,#f0e6d7);color:var(--ink);font-family:"Noto Serif SC",Songti SC,STSong,serif}a{color:inherit}button{font:inherit}.portal-shell{position:relative;min-height:100dvh;overflow:hidden}.noise-layer{position:absolute;inset:0;opacity:.15;pointer-events:none;background-image:linear-gradient(hsla(0,0%,100%,.3),hsla(0,0%,100%,.3)),url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120' viewBox='0 0 120 120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='120' height='120' filter='url(%23n)' opacity='.18'/%3E%3C/svg%3E")}.hero-panel{position:relative;z-index:1;width:min(1320px,calc(100vw - 40px));min-height:calc(100dvh - 28px);margin:14px auto;padding:14px;display:grid;grid-template-columns:1.08fr .92fr;gap:16px;align-items:stretch}.hero-copy,.teacher-card{background:var(--panel);backdrop-filter:blur(18px);border:1px solid var(--line);box-shadow:var(--shadow)}.hero-copy{border-radius:36px;padding:28px 28px 22px;position:relative;overflow:hidden}.hero-topbar{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}.hero-copy:after{content:"";position:absolute;inset:auto -80px -100px auto;width:280px;height:280px;border-radius:50%;background:radial-gradient(circle,rgba(255,179,95,.35),transparent 68%)}.eyebrow{display:inline-flex;align-items:center;gap:8px;padding:10px 16px;border-radius:999px;color:#5b4b2f;background:hsla(0,0%,100%,.6);border:1px solid rgba(97,78,38,.1);letter-spacing:.08em;font-size:13px}.portal-actions{display:flex;align-items:center;gap:10px;flex-wrap:wrap;justify-content:flex-end}.portal-action{display:inline-flex;align-items:center;gap:8px;min-height:42px;padding:0 16px;border-radius:999px;border:1px solid rgba(43,50,61,.1);background:hsla(0,0%,100%,.78);color:#2f3a49;text-decoration:none;cursor:pointer;transition:transform .16s ease,box-shadow .16s ease,border-color .16s ease}.portal-action:focus-visible,.portal-action:hover{transform:translateY(-1px);border-color:rgba(43,50,61,.18);box-shadow:0 12px 24px rgba(48,42,31,.08)}.portal-action-link{color:#27506d}.portal-action-agent{color:#fff;background:linear-gradient(135deg,#27506d,#3f78a6);border-color:transparent}.subject-grid{margin-top:16px;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.subject-card{position:relative;display:block;min-height:194px;padding:16px 15px 14px;border-radius:22px;border:1px solid rgba(52,61,76,.08);background:hsla(0,0%,100%,.7);text-align:left;text-decoration:none;cursor:pointer;overflow:hidden;transition:border-color .18s ease,box-shadow .18s ease,background .18s ease}.subject-card.is-active,.subject-card:focus-visible,.subject-card:hover{border-color:color-mix(in srgb,var(--accent) 38%,#fff);box-shadow:0 16px 28px color-mix(in srgb,var(--accent) 16%,transparent);background:linear-gradient(180deg,hsla(0,0%,100%,.96),rgba(255,252,247,.88))}.subject-icon{width:40px;height:40px;display:inline-flex;align-items:center;justify-content:center;border-radius:16px;color:#fff;background:var(--accent);box-shadow:inset 0 -8px 14px rgba(0,0,0,.12)}.subject-label{display:block;margin-top:12px;color:color-mix(in srgb,var(--accent) 82%,#1f2937);font-size:13px;letter-spacing:.08em;min-height:2.6em}.subject-card strong{display:block;margin-top:8px;font-size:18px;line-height:1.28;min-height:2.7em}.subject-card small{display:block;margin-top:8px;color:var(--muted);font-size:13px;line-height:1.55;min-height:4.8em}.teacher-stage{position:relative;min-height:100%;display:flex;align-items:stretch}.stage-backdrop{position:absolute;inset:6% 10% 5% auto;width:64%;border-radius:40px;background:radial-gradient(circle at top,rgba(255,199,132,.42),transparent 38%),linear-gradient(180deg,hsla(0,0%,100%,.55),rgba(255,246,234,.1));filter:blur(8px);transition:background .24s ease}.stage-english{background:radial-gradient(circle at top,rgba(55,187,129,.4),transparent 36%),linear-gradient(180deg,hsla(0,0%,100%,.6),rgba(219,255,238,.1))}.stage-politics{background:radial-gradient(circle at top,rgba(220,105,59,.42),transparent 36%),linear-gradient(180deg,hsla(0,0%,100%,.56),rgba(255,232,219,.1))}.stage-pedagogy{background:radial-gradient(circle at top,rgba(73,116,236,.42),transparent 36%),linear-gradient(180deg,hsla(0,0%,100%,.56),rgba(229,235,255,.12))}.stage-politics852{background:radial-gradient(circle at top,rgba(131,83,220,.46),transparent 38%),linear-gradient(180deg,hsla(0,0%,100%,.58),rgba(242,233,255,.12))}.teacher-card{width:100%;border-radius:40px;padding:18px 18px 16px;position:relative;display:grid;grid-template-rows:auto 1fr auto;overflow:hidden;transition:background .24s ease,border-color .24s ease,box-shadow .24s ease}.teacher-card-english{background:linear-gradient(180deg,rgba(248,255,250,.86),rgba(240,248,242,.8))}.teacher-card-politics{background:linear-gradient(180deg,rgba(255,248,242,.88),hsla(21,63%,95%,.8))}.teacher-card-pedagogy{background:linear-gradient(180deg,rgba(246,248,255,.9),rgba(236,242,255,.82))}.teacher-card-politics852{background:linear-gradient(180deg,rgba(250,246,255,.9),rgba(240,234,255,.84))}.teacher-badge{justify-self:start;padding:10px 14px;border-radius:999px;background:hsla(0,0%,100%,.62);color:#8a4e24;border:1px solid rgba(138,78,36,.12);font-size:13px;letter-spacing:.08em}.teacher-photo-shell{position:relative;display:flex;align-items:center;justify-content:center;min-height:390px;padding:10px 0 6px}.teacher-photo-frame{position:relative;width:min(100%,470px);aspect-ratio:4/3;border-radius:30px;overflow:hidden;border:1px solid rgba(43,50,61,.12);background:hsla(0,0%,100%,.56);box-shadow:0 24px 40px rgba(70,53,35,.14),inset 0 0 0 1px hsla(0,0%,100%,.36)}.teacher-photo-frame:after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,hsla(0,0%,100%,.06),hsla(0,0%,100%,0));pointer-events:none}.teacher-photo{-o-object-fit:cover;object-fit:cover}.teacher-photo-frame-english{box-shadow:0 24px 40px rgba(15,123,87,.18),inset 0 0 0 1px hsla(0,0%,100%,.36)}.teacher-photo-frame-politics{box-shadow:0 24px 40px rgba(196,84,42,.16),inset 0 0 0 1px hsla(0,0%,100%,.36)}.teacher-photo-frame-pedagogy{box-shadow:0 24px 40px rgba(54,89,201,.16),inset 0 0 0 1px hsla(0,0%,100%,.36)}.teacher-photo-frame-politics852{box-shadow:0 24px 40px rgba(123,76,194,.16),inset 0 0 0 1px hsla(0,0%,100%,.36)}.teacher-dialogue{margin-top:6px;padding:0 8px 4px;text-align:center}.teacher-dialogue span{display:block;color:var(--muted);font-size:13px;letter-spacing:.08em}.teacher-dialogue strong{display:block;margin-top:8px;font-size:22px;line-height:1.35}.agent-modal{position:fixed;inset:0;z-index:30;display:grid;place-items:center;padding:24px;background:rgba(18,25,38,.48);backdrop-filter:blur(8px)}.agent-panel{width:min(1120px,calc(100vw - 40px));height:min(760px,calc(100dvh - 48px));display:grid;grid-template-rows:auto auto auto minmax(0,1fr);gap:14px;padding:22px;border-radius:30px;border:1px solid hsla(0,0%,100%,.24);background:rgba(255,248,240,.96);box-shadow:0 30px 90px rgba(16,20,27,.28)}.agent-panel-header{display:flex;align-items:center;justify-content:space-between;gap:16px}.agent-panel-header strong{display:block;margin-top:4px;font-size:28px;line-height:1.1}.agent-panel-kicker{display:inline-block;color:#8b5f31;font-size:12px;letter-spacing:.12em}.agent-close{width:42px;height:42px;border:0;border-radius:999px;display:inline-flex;align-items:center;justify-content:center;background:rgba(32,45,65,.08);color:#223249;cursor:pointer}.agent-panel-copy{margin:0;color:#576171;line-height:1.7}.agent-chat-shell{min-height:0;display:grid;grid-template-rows:auto minmax(0,1fr) auto auto;gap:14px;overflow:hidden}.agent-toolbar{display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap}.agent-toolbar-meta span{display:block;color:#7c8795;font-size:12px;letter-spacing:.1em}.agent-toolbar-meta strong{display:block;margin-top:4px;font-size:18px}.agent-ghost-button,.agent-send-button,.agent-toolbar-button{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:42px;padding:0 15px;border-radius:999px;border:1px solid rgba(43,50,61,.12);background:hsla(0,0%,100%,.92);color:#263344;cursor:pointer}.agent-ghost-button:disabled,.agent-send-button:disabled,.agent-toolbar-button:disabled{opacity:.5;cursor:not-allowed}.agent-messages{min-height:0;overflow-y:auto;border-radius:24px;border:1px solid rgba(37,51,67,.12);background:#fff;padding:18px;display:flex;flex-direction:column;gap:12px}.agent-empty{min-height:100%;display:grid;place-items:center;gap:10px;padding:36px 18px;text-align:center;color:#6d7787}.agent-empty strong{color:#243244;font-size:20px}.agent-message{max-width:min(78%,620px);padding:14px 16px;border-radius:20px;box-shadow:0 12px 24px rgba(39,52,68,.06)}.agent-message-role{display:block;margin-bottom:8px;font-size:12px;letter-spacing:.08em;color:#7b8593}.agent-message p{margin:0;line-height:1.7;white-space:pre-wrap}.agent-message-user{align-self:flex-end;background:linear-gradient(135deg,#2f5f84,#4c86b6);color:#fff;border-bottom-right-radius:8px}.agent-message-user .agent-message-role{color:hsla(0,0%,100%,.7)}.agent-message-assistant{align-self:flex-start;background:#f8f4ee;color:#233141;border-bottom-left-radius:8px}.agent-thinking{display:inline-flex;align-items:center;gap:10px;align-self:flex-start;color:#5f6a79;padding:8px 0}.agent-spin{animation:agent-spin .9s linear infinite}.agent-compose{display:grid;gap:12px;min-height:0}.agent-compose textarea{width:100%;resize:none;min-height:96px;max-height:140px;padding:16px 18px;border-radius:22px;border:1px solid rgba(37,51,67,.14);background:hsla(0,0%,100%,.95);color:#1f2c3c;font:inherit;line-height:1.7}.agent-compose textarea:disabled{opacity:.6;cursor:not-allowed;background:hsla(0,0%,94%,.8)}.agent-compose-actions{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}.agent-send-button{color:#fff;border-color:transparent;background:linear-gradient(135deg,#27506d,#3f78a6)}.agent-error{margin:0;color:#a9402c;line-height:1.6}.agent-login-hint{display:flex;align-items:flex-start;gap:8px;padding:10px 14px;border-radius:12px;background:rgba(39,80,109,.06);border:1px solid rgba(39,80,109,.12);color:#4a6277;font-size:13px;line-height:1.6}.agent-login-hint svg{flex-shrink:0;margin-top:2px;color:#27506d}.agent-login-hint a{color:#27506d;font-weight:600;text-decoration:underline;text-underline-offset:2px}.portal-record-footer{padding:0 20px 20px;text-align:center;color:#5c7284;font-size:12px}.portal-record-footer a{color:inherit;text-decoration:none}.portal-record-footer a:hover{text-decoration:underline}@keyframes agent-spin{0%{transform:rotate(0deg)}to{transform:rotate(1turn)}}@media (max-width:980px){.portal-shell{overflow:auto}.hero-panel{width:min(100vw - 20px,680px);min-height:auto;margin:10px auto;padding:10px;grid-template-columns:1fr}.hero-copy,.teacher-card{border-radius:28px}.hero-copy{padding:20px 18px 18px}.portal-actions{justify-content:flex-start}.teacher-card{padding:16px}.teacher-photo-shell{min-height:auto}.teacher-photo-frame{width:100%;max-width:none}}@media (max-width:640px){.hero-panel{width:calc(100vw - 16px);margin:8px auto;padding:8px;gap:10px}.hero-copy{padding:16px 14px 14px}.subject-grid{grid-template-columns:1fr}.agent-modal{padding:14px}.agent-panel{width:min(100vw - 12px,100%);height:min(100dvh - 20px,100%);padding:16px;border-radius:24px}.agent-panel-header strong{font-size:22px}.agent-messages{min-height:0}.agent-message{max-width:100%}.subject-card{min-height:176px}.subject-card small,.subject-card strong{min-height:auto}.teacher-dialogue strong{font-size:18px}}