/* ============ FluentLab Design System v1.0 ============ */
:root{
  --bg:#F5F6FB; --bg-soft:#EDEFF8; --card:#FFFFFF; --card-2:#F8FAFF;
  --ink:#0F172A; --ink-2:#475569; --ink-3:#94A3B8;
  --brand:#4F46E5; --brand-2:#7C3AED; --brand-3:#6366F1;
  --accent:#16A34A; --accent-2:#65A30D; --amber:#D97706; --rose:#E11D48; --sky:#0284C7;
  --line:#E4E7F0; --line-2:#EEF1F7;
  --radius:18px; --radius-sm:12px; --radius-lg:26px;
  --shadow-sm:0 1px 2px rgba(15,23,42,.05);
  --shadow:0 10px 30px -8px rgba(15,23,42,.12);
  --shadow-lg:0 30px 60px -18px rgba(15,23,42,.22);
  --grad:linear-gradient(135deg,#4F46E5 0%,#7C3AED 100%);
  --grad-soft:linear-gradient(135deg,rgba(79,70,229,.10),rgba(124,58,237,.10));
}
[data-theme="dark"]{
  --bg:#0B1020; --bg-soft:#111832; --card:#151D36; --card-2:#1A2342;
  --ink:#F1F5F9; --ink-2:#B6C2DA; --ink-3:#7C8AA5;
  --brand:#818CF8; --brand-2:#A78BFA; --brand-3:#6366F1;
  --accent:#4ADE80; --accent-2:#A3E635; --amber:#FBBF24; --rose:#FB7185; --sky:#38BDF8;
  --line:#263156; --line-2:#1E2A4A;
  --grad:linear-gradient(135deg,#6366F1 0%,#8B5CF6 100%);
  --grad-soft:linear-gradient(135deg,rgba(99,102,241,.16),rgba(139,92,246,.16));
  --shadow:0 10px 30px -8px rgba(0,0,0,.5);
  --shadow-lg:0 30px 60px -18px rgba(0,0,0,.6);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;font-size:18px}
body{
  font-family:"Inter","SF Pro Display",-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  background:var(--bg); color:var(--ink); line-height:1.7;
  -webkit-font-smoothing:antialiased; min-height:100vh;
  text-rendering:optimizeLegibility;
}
.stat-val,.quiz-timer,.ls b,.seg-pct,.fc-word,.mock-word{font-variant-numeric:tabular-nums}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}
input,textarea,select{font-family:inherit;color:inherit}
::selection{background:rgba(99,102,241,.25)}
.serif{font-family:Georgia,"Times New Roman",serif}

/* ---- Aurora ---- */
.aurora{position:fixed;inset:0;z-index:-1;overflow:hidden;pointer-events:none}
.blob{position:absolute;border-radius:50%;filter:blur(90px);opacity:.5}
.blob.b1{width:55vw;height:55vw;background:radial-gradient(circle,#C7D2FE,transparent 65%);top:-18%;left:-12%}
.blob.b2{width:45vw;height:45vw;background:radial-gradient(circle,#DDD6FE,transparent 65%);top:20%;right:-14%}
.blob.b3{width:40vw;height:40vw;background:radial-gradient(circle,#BBF7D0,transparent 65%);bottom:-16%;left:28%}
[data-theme="dark"] .blob{opacity:.22}
[data-theme="dark"] .blob.b1{background:radial-gradient(circle,#4338CA,transparent 65%)}
[data-theme="dark"] .blob.b2{background:radial-gradient(circle,#6D28D9,transparent 65%)}
[data-theme="dark"] .blob.b3{background:radial-gradient(circle,#166534,transparent 65%)}

/* ---- Topbar ---- */
.topbar{position:sticky;top:0;z-index:100;backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  background:color-mix(in srgb,var(--bg) 80%,transparent);border-bottom:1px solid var(--line-2)}
.topbar-inner{max-width:1240px;margin:0 auto;padding:0 24px;height:68px;display:flex;align-items:center;gap:26px}
.brand{display:flex;align-items:center;gap:11px;flex-shrink:0}
.brand-mark{width:42px;height:42px;border-radius:13px;background:var(--grad);color:#fff;display:grid;place-items:center;
  box-shadow:0 6px 16px -4px rgba(79,70,229,.5)}
.brand-mark.small{width:38px;height:38px;border-radius:11px}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text b{font-size:1.12rem;letter-spacing:-.02em}
.brand-text i{font-style:normal;font-size:.72rem;color:var(--ink-3);letter-spacing:.14em}
.nav{display:flex;align-items:center;gap:4px;flex:1}
.nav-link{display:flex;align-items:center;gap:6px;padding:9px 15px;border-radius:11px;font-size:.93rem;font-weight:600;color:var(--ink-2);
  transition:all .18s;white-space:nowrap}
.nav-link:hover{color:var(--ink);background:var(--bg-soft)}
.nav-link.active{color:var(--brand);background:var(--grad-soft)}
.nav-group{position:relative}
.nav-dropdown{position:absolute;top:calc(100% + 10px);left:50%;transform:translateX(-50%) translateY(8px);min-width:250px;
  background:var(--card);border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow-lg);padding:8px;
  opacity:0;visibility:hidden;transition:all .2s}
.nav-group:hover .nav-dropdown,.nav-group:focus-within .nav-dropdown{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0)}
.nav-dropdown a{display:flex;flex-direction:column;padding:10px 13px;border-radius:11px;transition:background .15s}
.nav-dropdown a:hover{background:var(--bg-soft)}
.nav-dropdown a b{font-size:.9rem}
.nav-dropdown a span{font-size:.75rem;color:var(--ink-3)}
.topbar-right{display:flex;align-items:center;gap:9px;flex-shrink:0}
.chip{display:inline-flex;align-items:center;gap:5px;padding:7px 13px;border-radius:999px;font-size:.82rem;font-weight:700;
  border:1px solid var(--line);background:var(--card);color:var(--ink-2)}
.chip-streak{color:#EA580C;border-color:rgba(234,88,12,.25);background:rgba(234,88,12,.08)}
.chip-xp{color:var(--brand);border-color:rgba(99,102,241,.28);background:var(--grad-soft)}
.chip-pro{color:#fff;border-color:transparent;background:var(--grad);box-shadow:0 6px 14px -4px rgba(79,70,229,.45)}
.chip-pro:hover{transform:translateY(-1px)}
@media (max-width:860px){ .chip-xp{display:none} .chip-pro{padding:7px 11px;font-size:.76rem} }
@media (max-width:640px){ .chip-streak{display:none} }
.icon-btn{width:40px;height:40px;border-radius:12px;display:grid;place-items:center;color:var(--ink-2);border:1px solid var(--line);
  background:var(--card);font-size:1.05rem;transition:all .15s}
.icon-btn:hover{color:var(--brand);border-color:var(--brand)}
.nav-toggle{display:none}
/* ---- Layout & View ---- */
.view{max-width:1240px;margin:0 auto;padding:34px 24px 80px;min-height:60vh}
@keyframes fadeUp{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}
.animate-in{animation:fadeUp .45s cubic-bezier(.2,.7,.3,1) both}
.section{margin-bottom:38px}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:18px;margin-bottom:20px;flex-wrap:wrap}
.section-head h2{font-size:1.5rem;letter-spacing:-.02em;display:flex;align-items:center;gap:10px}
.section-head p{color:var(--ink-2);font-size:.92rem;margin-top:2px}
.eyebrow{display:inline-flex;align-items:center;gap:7px;font-size:.78rem;font-weight:700;letter-spacing:.12em;
  color:var(--brand);background:var(--grad-soft);padding:5px 12px;border-radius:999px;margin-bottom:14px}

/* ---- Buttons ---- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 24px;border-radius:13px;
  font-size:.95rem;font-weight:700;transition:all .18s;border:1px solid transparent;white-space:nowrap}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 10px 24px -8px rgba(79,70,229,.55)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 32px -10px rgba(79,70,229,.6)}
.btn-ghost{border-color:var(--line);color:var(--ink);background:var(--card)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-2px)}
.btn-soft{background:var(--grad-soft);color:var(--brand);border-color:rgba(99,102,241,.2)}
.btn-soft:hover{background:rgba(99,102,241,.16)}
.btn-lg{padding:15px 30px;font-size:1rem;border-radius:15px}
.btn-sm{padding:8px 16px;font-size:.85rem;border-radius:10px}
.btn:disabled{opacity:.5;cursor:not-allowed;transform:none!important}
.btn-block{width:100%}

/* ---- Cards ---- */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-sm);padding:24px}
.card-glass{background:color-mix(in srgb,var(--card) 82%,transparent);backdrop-filter:blur(10px)}
.card-hover{transition:transform .2s,box-shadow .2s,border-color .2s}
.card-hover:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:rgba(99,102,241,.35)}
.tag{display:inline-flex;align-items:center;gap:5px;font-size:.74rem;font-weight:700;padding:3px 10px;border-radius:999px;
  background:var(--bg-soft);color:var(--ink-2);border:1px solid var(--line-2)}
.tag-brand{background:var(--grad-soft);color:var(--brand);border-color:rgba(99,102,241,.25)}
.tag-ok{background:rgba(22,163,74,.1);color:var(--accent);border-color:rgba(22,163,74,.25)}
.tag-warn{background:rgba(217,119,6,.1);color:var(--amber);border-color:rgba(217,119,6,.25)}
.tag-bad{background:rgba(225,29,72,.08);color:var(--rose);border-color:rgba(225,29,72,.22)}
.grid{display:grid;gap:18px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}

/* ---- Progress ---- */
.progress{height:8px;border-radius:999px;background:var(--bg-soft);overflow:hidden}
.progress>i{display:block;height:100%;border-radius:999px;background:var(--grad);transition:width .5s cubic-bezier(.2,.7,.3,1)}

/* ---- Tables ---- */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);background:var(--card)}
table.tbl{width:100%;border-collapse:collapse;font-size:.88rem;min-width:640px}
table.tbl th{background:var(--bg-soft);text-align:left;padding:13px 16px;font-size:.8rem;letter-spacing:.04em;
  color:var(--ink-2);font-weight:700;border-bottom:1px solid var(--line);white-space:nowrap}
table.tbl td{padding:13px 16px;border-bottom:1px solid var(--line-2);vertical-align:top}
table.tbl tr:last-child td{border-bottom:none}
table.tbl tbody tr:hover{background:var(--card-2)}

/* ---- Empty state ---- */
.empty{display:flex;flex-direction:column;align-items:center;gap:12px;padding:56px 20px;text-align:center;color:var(--ink-2)}
.empty .empty-icon{width:64px;height:64px;border-radius:20px;background:var(--grad-soft);display:grid;place-items:center;font-size:1.7rem}

/* ---- Toast ---- */
.toast-root{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);z-index:1000;display:flex;flex-direction:column;gap:10px;align-items:center}
.toast{display:flex;align-items:center;gap:10px;padding:12px 20px;border-radius:14px;background:var(--ink);color:var(--bg);
  font-size:.9rem;font-weight:600;box-shadow:var(--shadow-lg);animation:toastIn .3s cubic-bezier(.2,.9,.3,1.2)}
.toast.ok{background:#166534;color:#fff}.toast.bad{background:#9F1239;color:#fff}.toast.warn{background:#92400E;color:#fff}
@keyframes toastIn{from{opacity:0;transform:translateY(16px) scale(.94)}to{opacity:1;transform:none}}
.toast.out{opacity:0;transform:translateY(10px);transition:all .3s}

/* ---- Modal ---- */
.modal-root{position:fixed;inset:0;z-index:900;display:none;place-items:center;background:rgba(15,23,42,.5);
  backdrop-filter:blur(4px);padding:20px}
.modal-root.open{display:grid}
.modal{background:var(--card);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);max-width:560px;width:100%;
  padding:30px;animation:fadeUp .3s both;max-height:86vh;overflow:auto}
.modal h3{font-size:1.2rem;margin-bottom:12px}

/* ---- Footer ---- */
.footer{border-top:1px solid var(--line-2);background:color-mix(in srgb,var(--card) 60%,transparent);margin-top:40px}
.footer-inner{max-width:1240px;margin:0 auto;padding:40px 24px 34px;display:flex;flex-direction:column;gap:20px}
.footer-brand{display:flex;align-items:center;gap:13px}
.footer-brand b{font-size:1.02rem}
.footer-brand p{font-size:.82rem;color:var(--ink-3)}
.footer-links{display:flex;flex-wrap:wrap;gap:8px 22px;font-size:.86rem;color:var(--ink-2)}
.footer-links a:hover{color:var(--brand)}
.footer-note{font-size:.78rem;color:var(--ink-3);line-height:1.7}
.footer-copy{font-size:.78rem;color:var(--ink-3)}

/* ---- Responsive ---- */
@media (max-width:1020px){
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .grid-3{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:860px){
  .nav{position:fixed;top:68px;left:0;right:0;flex-direction:column;align-items:stretch;background:var(--card);
    border-bottom:1px solid var(--line);padding:14px 18px 20px;gap:6px;box-shadow:var(--shadow-lg);
    transform:translateY(-8px);opacity:0;visibility:hidden;transition:all .22s}
  .nav.open{transform:none;opacity:1;visibility:visible}
  .nav-link{padding:13px 15px;font-size:1rem}
  .nav-dropdown{position:static;transform:none;opacity:1;visibility:visible;box-shadow:none;border:none;
    background:var(--bg-soft);margin:4px 0 8px;min-width:0}
  .nav-toggle{display:grid}
  .topbar-inner{gap:12px}
  .chip-xp{display:none}
}
@media (max-width:640px){
  .grid-4,.grid-3,.grid-2{grid-template-columns:1fr}
  .view{padding:24px 16px 60px}
  .chip-streak{display:none}
}
/* ================= HOME ================= */
.hero{display:grid;grid-template-columns:1.08fr .92fr;gap:44px;align-items:center;padding:46px 0 34px}
.hero-title{font-size:3.1rem;line-height:1.14;letter-spacing:-.03em;font-weight:800;margin:6px 0 18px}
.hero-title .grad{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-sub{font-size:1.06rem;color:var(--ink-2);max-width:520px;margin-bottom:28px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:34px}
.hero-proof{display:flex;gap:26px;flex-wrap:wrap}
.hero-proof .proof{display:flex;flex-direction:column}
.hero-proof b{font-size:1.35rem;letter-spacing:-.02em}
.hero-proof span{font-size:.78rem;color:var(--ink-3)}
.hero-visual{position:relative}
.mock-stack{position:relative;display:flex;flex-direction:column;gap:16px}
.mock-card{background:var(--card);border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow-lg);padding:20px 22px}
.mock-word{font-family:Georgia,serif;font-size:1.9rem;letter-spacing:-.01em}
.mock-word small{font-family:sans-serif;font-size:.85rem;color:var(--ink-3);margin-left:10px}
.mock-zh{color:var(--ink-2);font-size:.9rem;margin-top:2px}
.mock-btns{display:flex;gap:8px;margin-top:14px}
.mock-btn{flex:1;padding:8px 0;border-radius:10px;font-size:.78rem;font-weight:700;text-align:center;background:var(--bg-soft);color:var(--ink-2)}
.mock-btn.g{background:rgba(22,163,74,.12);color:#15803D}
.mock-btn.b{background:var(--grad-soft);color:var(--brand)}
.mock-float{position:absolute;background:var(--card);border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow);
  padding:13px 17px;font-size:.82rem;font-weight:700;display:flex;align-items:center;gap:9px;animation:floaty 5s ease-in-out infinite}
.mock-float.f1{top:-22px;right:-6px}
.mock-float.f2{bottom:-18px;left:-14px;animation-delay:2.4s}
.mock-float .dot{width:9px;height:9px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 4px rgba(22,163,74,.18)}
.mock-float .dot.v{background:var(--brand);box-shadow:0 0 0 4px rgba(99,102,241,.18)}
@keyframes floaty{0%,100%{transform:translateY(0)}50%{transform:translateY(-9px)}}
.ring{transform:rotate(-90deg)}
.ring circle{fill:none;stroke-linecap:round}

.stat-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:20px 22px;position:relative;overflow:hidden}
.stat-card::after{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:var(--grad)}
.stat-card .stat-val{font-size:1.85rem;font-weight:800;letter-spacing:-.03em;line-height:1.1}
.stat-card .stat-label{font-size:.82rem;color:var(--ink-2);margin-top:3px}
.stat-card .stat-foot{font-size:.74rem;color:var(--ink-3);margin-top:8px;display:flex;align-items:center;gap:5px}
.stat-card .stat-emoji{position:absolute;top:16px;right:16px;font-size:1.3rem;opacity:.85}

.feature-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:26px;display:flex;flex-direction:column;gap:12px}
.feature-card .f-icon{width:50px;height:50px;border-radius:15px;display:grid;place-items:center;font-size:1.45rem;
  background:var(--grad-soft);border:1px solid rgba(99,102,241,.18)}
.feature-card h3{font-size:1.05rem}
.feature-card p{font-size:.88rem;color:var(--ink-2)}
.feature-card ul{list-style:none;display:flex;flex-direction:column;gap:6px;font-size:.82rem;color:var(--ink-2)}
.feature-card ul li{display:flex;gap:8px;align-items:flex-start}
.feature-card ul li::before{content:"✓";color:var(--accent);font-weight:800}

.flow{display:grid;grid-template-columns:repeat(3,1fr);gap:0;align-items:stretch}
.flow-step{background:var(--card);border:1px solid var(--line);padding:26px;position:relative;display:flex;flex-direction:column;gap:10px}
.flow-step:first-child{border-radius:var(--radius) 0 0 var(--radius)}
.flow-step:last-child{border-radius:0 var(--radius) var(--radius) 0}
.flow-step + .flow-step{border-left:none}
.flow-step .f-num{width:34px;height:34px;border-radius:11px;background:var(--grad);color:#fff;display:grid;place-items:center;
  font-weight:800;font-size:.9rem}
.flow-step h3{font-size:1rem}
.flow-step p{font-size:.85rem;color:var(--ink-2)}
.flow-arrow{position:absolute;right:-13px;top:50%;transform:translateY(-50%);z-index:2;width:26px;height:26px;border-radius:50%;
  background:var(--card);border:1px solid var(--line);display:grid;place-items:center;color:var(--brand);font-size:.8rem;box-shadow:var(--shadow-sm)}

.preview-card{display:flex;flex-direction:column;gap:12px;padding:26px;cursor:pointer}
.preview-card .p-head{display:flex;align-items:center;gap:13px}
.preview-card .p-icon{width:46px;height:46px;border-radius:14px;display:grid;place-items:center;font-size:1.3rem;background:var(--grad-soft)}
.preview-card h3{font-size:1.02rem}
.preview-card p{font-size:.85rem;color:var(--ink-2)}
.preview-card .p-foot{margin-top:auto;font-size:.84rem;font-weight:700;color:var(--brand);display:flex;align-items:center;gap:6px}

.pricing{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;align-items:stretch}
.price-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius-lg);padding:30px;display:flex;flex-direction:column;gap:16px;position:relative}
.price-card.hot{border:2px solid var(--brand);box-shadow:0 24px 50px -20px rgba(79,70,229,.4);transform:scale(1.02)}
.price-card .p-name{font-weight:800;font-size:1.05rem}
.price-card .p-price{font-size:2.3rem;font-weight:800;letter-spacing:-.03em}
.price-card .p-price small{font-size:.85rem;font-weight:600;color:var(--ink-3)}
.price-card ul{list-style:none;display:flex;flex-direction:column;gap:9px;font-size:.87rem;color:var(--ink-2)}
.price-card ul li{display:flex;gap:9px}
.price-card ul li::before{content:"✓";color:var(--accent);font-weight:800}
.price-card .hot-tag{position:absolute;top:-13px;left:50%;transform:translateX(-50%);background:var(--grad);color:#fff;
  font-size:.74rem;font-weight:700;padding:5px 14px;border-radius:999px;box-shadow:var(--shadow)}

.cta-box{background:var(--grad);border-radius:var(--radius-lg);padding:54px 44px;text-align:center;color:#fff;position:relative;overflow:hidden}
.cta-box::before{content:"";position:absolute;width:420px;height:420px;border-radius:50%;background:rgba(255,255,255,.12);
  top:-200px;right:-120px}
.cta-box h2{font-size:2rem;letter-spacing:-.02em;margin-bottom:12px;position:relative}
.cta-box p{opacity:.88;margin-bottom:26px;position:relative}
.cta-box .btn{background:#fff;color:var(--brand);position:relative}
.cta-box .btn:hover{transform:translateY(-2px)}

/* ================= INSIGHTS ================= */
.insights-hero{padding:44px 0 8px}
.insights-hero h1{font-size:2.4rem;letter-spacing:-.03em;margin-bottom:14px}
.insights-hero p{color:var(--ink-2);max-width:760px}
.src-note{font-size:.76rem;color:var(--ink-3);margin-top:12px;line-height:1.6}
.prio-p0{border-left:4px solid var(--brand)}
.prio-p1{border-left:4px solid var(--amber)}
.prio-p2{border-left:4px solid var(--accent)}
.gap-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.gap-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px;display:flex;gap:15px}
.gap-card .g-num{flex-shrink:0;width:38px;height:38px;border-radius:12px;background:var(--grad);color:#fff;
  display:grid;place-items:center;font-weight:800}
.gap-card h4{font-size:.98rem;margin-bottom:5px}
.gap-card p{font-size:.85rem;color:var(--ink-2)}
.quadrant{display:grid;grid-template-columns:1fr 1fr;grid-template-rows:1fr 1fr;gap:12px;position:relative}
.quadrant .q-cell{background:var(--card);border:1px dashed var(--line);border-radius:14px;padding:16px;min-height:120px}
.quadrant .q-cell.hot{background:var(--grad-soft);border:1.5px solid var(--brand)}
.quadrant .q-cell b{font-size:.85rem;display:block;margin-bottom:8px}
.quadrant .q-cell .q-item{font-size:.8rem;color:var(--ink-2);padding:4px 0}
.axis-label{font-size:.78rem;color:var(--ink-3);font-weight:700;letter-spacing:.08em;padding:6px 2px}
.seg-bar{display:flex;align-items:center;gap:14px;padding:11px 0;border-bottom:1px solid var(--line-2)}
.seg-bar:last-child{border-bottom:none}
.seg-bar .seg-name{width:190px;font-size:.88rem;font-weight:600;flex-shrink:0}
.seg-bar .seg-track{flex:1;height:14px;border-radius:999px;background:var(--bg-soft);overflow:hidden}
.seg-bar .seg-fill{height:100%;border-radius:999px;background:var(--grad)}
.seg-bar .seg-pct{width:52px;text-align:right;font-weight:800;font-size:.88rem;flex-shrink:0}
.seg-bar .seg-desc{width:260px;font-size:.78rem;color:var(--ink-3);flex-shrink:0}

@media (max-width:960px){
  .hero{grid-template-columns:1fr;gap:34px;padding-top:26px}
  .hero-title{font-size:2.4rem}
  .flow{grid-template-columns:1fr}
  .flow-step:first-child{border-radius:var(--radius) var(--radius) 0 0}
  .flow-step:last-child{border-radius:0 0 var(--radius) var(--radius)}
  .flow-step + .flow-step{border-left:1px solid var(--line);border-top:none}
  .flow-arrow{display:none}
  .pricing{grid-template-columns:1fr}
  .price-card.hot{transform:none}
  .gap-grid{grid-template-columns:1fr}
  .quadrant{grid-template-columns:1fr}
  .seg-bar .seg-desc,.seg-bar .seg-name{width:auto}
  .seg-bar{flex-wrap:wrap}
}
/* ================= VOCAB ================= */
.deck-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:16px}
.deck-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px;cursor:pointer;
  display:flex;flex-direction:column;gap:10px;transition:all .2s;position:relative;overflow:hidden}
.deck-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:rgba(99,102,241,.4)}
.deck-card .d-flag{font-size:1.7rem}
.deck-card h3{font-size:1.02rem}
.deck-card .d-desc{font-size:.82rem;color:var(--ink-2);min-height:2.6em}
.deck-card .d-meta{display:flex;gap:8px;flex-wrap:wrap}
.deck-card .d-progress{margin-top:auto}
.deck-card .d-empty-badge{position:absolute;top:14px;right:14px;font-size:.7rem;font-weight:800;color:var(--accent);
  background:rgba(22,163,74,.12);padding:3px 9px;border-radius:999px}
.deck-bar{display:flex;align-items:center;gap:12px;background:var(--card);border:1px solid var(--line);border-radius:14px;
  padding:14px 18px;margin-bottom:20px;flex-wrap:wrap}
.deck-bar .db-title{font-weight:800;font-size:1.02rem}
.deck-bar .db-stats{display:flex;gap:16px;font-size:.82rem;color:var(--ink-2);margin-left:auto;flex-wrap:wrap}
.deck-bar .db-stats b{color:var(--ink)}

/* Flashcard */
.fc-stage{max-width:640px;margin:0 auto;perspective:1400px}
.fc-3d{position:relative;width:100%;min-height:340px;transform-style:preserve-3d;transition:transform .55s cubic-bezier(.3,.8,.3,1)}
.fc-3d.flipped{transform:rotateY(180deg)}
.fc-face{position:absolute;inset:0;backface-visibility:hidden;-webkit-backface-visibility:hidden;background:var(--card);
  border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow);padding:40px 36px;
  display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;gap:10px}
.fc-front{z-index:2}
.fc-back{transform:rotateY(180deg)}
.fc-word{font-family:Georgia,serif;font-size:2.6rem;letter-spacing:-.02em;font-weight:600}
.fc-ph{color:var(--ink-3);font-size:1rem}
.fc-hint{font-size:.8rem;color:var(--ink-3);margin-top:10px}
.fc-pos{font-size:.78rem;font-weight:800;color:var(--brand);background:var(--grad-soft);padding:2px 10px;border-radius:999px}
.fc-zh{font-size:1.25rem;font-weight:700}
.fc-ex{font-family:Georgia,serif;font-size:.98rem;color:var(--ink-2);line-height:1.6}
.fc-ex b{color:var(--brand);background:rgba(99,102,241,.12);border-radius:4px;padding:0 3px}
.fc-exzh{font-size:.84rem;color:var(--ink-3)}
.fc-mem{display:flex;gap:8px;font-size:.75rem;color:var(--ink-3);flex-wrap:wrap;justify-content:center}
.fc-actions{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;max-width:640px;margin:22px auto 0}
.rate-btn{padding:14px 6px;border-radius:14px;border:1px solid var(--line);background:var(--card);font-weight:800;
  font-size:.88rem;display:flex;flex-direction:column;gap:3px;align-items:center;transition:all .15s}
.rate-btn small{font-size:.7rem;font-weight:600;color:var(--ink-3)}
.rate-btn:hover{transform:translateY(-2px);box-shadow:var(--shadow)}
.rate-btn.r1:hover{border-color:var(--rose);color:var(--rose)}
.rate-btn.r2:hover{border-color:var(--amber);color:var(--amber)}
.rate-btn.r3:hover{border-color:var(--sky);color:var(--sky)}
.rate-btn.r4:hover{border-color:var(--accent);color:var(--accent)}
.fc-toolbar{display:flex;justify-content:space-between;align-items:center;max-width:640px;margin:0 auto 16px;gap:10px}
.fc-count{font-size:.86rem;color:var(--ink-2);font-weight:600}

/* session summary */
.summary-hero{text-align:center;padding:20px 0 26px}
.summary-hero .big{font-size:3.4rem;font-weight:800;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.summary-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin:20px 0}
.summary-grid .sg{background:var(--bg-soft);border-radius:14px;padding:16px;text-align:center}
.summary-grid .sg b{font-size:1.4rem;display:block}
.summary-grid .sg span{font-size:.76rem;color:var(--ink-3)}

/* ================= SPEAKING ================= */
.scn-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:16px}
.scn-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px;cursor:pointer;
  display:flex;flex-direction:column;gap:9px;transition:all .2s}
.scn-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:rgba(99,102,241,.4)}
.scn-card .s-emoji{font-size:1.8rem}
.scn-card h3{font-size:1rem}
.scn-card p{font-size:.82rem;color:var(--ink-2)}
.dlg-wrap{max-width:760px;margin:0 auto;display:flex;flex-direction:column;gap:14px}
.dlg-line{display:flex;gap:12px;align-items:flex-end}
.dlg-line.mine{flex-direction:row-reverse}
.dlg-avatar{flex-shrink:0;width:38px;height:38px;border-radius:50%;display:grid;place-items:center;font-size:1rem;font-weight:800}
.dlg-avatar.npc{background:var(--grad-soft);color:var(--brand)}
.dlg-avatar.me{background:rgba(22,163,74,.12);color:var(--accent)}
.dlg-bubble{max-width:78%;background:var(--card);border:1px solid var(--line);border-radius:18px 18px 18px 4px;padding:13px 17px}
.dlg-line.mine .dlg-bubble{background:var(--grad-soft);border-color:rgba(99,102,241,.25);border-radius:18px 18px 4px 18px}
.dlg-en{font-family:Georgia,serif;font-size:1rem;line-height:1.5}
.dlg-zh{font-size:.8rem;color:var(--ink-3);margin-top:4px}
.dlg-tools{display:flex;gap:8px;margin-top:9px;flex-wrap:wrap}
.mini-btn{display:inline-flex;align-items:center;gap:5px;font-size:.75rem;font-weight:700;padding:5px 11px;border-radius:999px;
  background:var(--bg-soft);color:var(--ink-2);border:1px solid var(--line-2);transition:all .15s}
.mini-btn:hover{color:var(--brand);border-color:var(--brand)}
.mini-btn.rec{background:rgba(225,29,72,.1);color:var(--rose);border-color:rgba(225,29,72,.3)}
.mini-btn.rec:hover{background:rgba(225,29,72,.18);color:var(--rose)}
.mini-btn:disabled{opacity:.55;cursor:not-allowed}
.mini-btn.pulse{animation:pulse 1.2s infinite}
@keyframes pulse{0%,100%{box-shadow:0 0 0 0 rgba(225,29,72,.35)}50%{box-shadow:0 0 0 7px rgba(225,29,72,0)}}
.score-pill{display:inline-flex;align-items:center;gap:5px;font-size:.76rem;font-weight:800;padding:4px 11px;border-radius:999px}
.score-pill.hi{background:rgba(22,163,74,.12);color:#15803D}
.score-pill.mid{background:rgba(217,119,6,.12);color:#B45309}
.score-pill.lo{background:rgba(225,29,72,.1);color:#BE123C}
.diff-ok{color:#15803D;font-weight:700}
.diff-miss{color:var(--rose);font-weight:700;text-decoration:underline wavy rgba(225,29,72,.5) 1.5px}
.diff-extra{color:var(--ink-3);text-decoration:line-through}
.tip-box{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:20px}
.tip-box h4{font-size:.92rem;margin-bottom:10px;display:flex;align-items:center;gap:7px}
.tip-box ul{list-style:none;display:flex;flex-direction:column;gap:8px;font-size:.85rem;color:var(--ink-2)}
.tip-box ul li{padding-left:20px;position:relative;font-family:Georgia,serif}
.tip-box ul li::before{content:"";position:absolute;left:2px;top:9px;width:7px;height:7px;border-radius:50%;background:var(--brand)}
.tip-box ul li b{font-family:sans-serif;color:var(--ink-3);font-weight:600;font-size:.78rem;margin-left:6px}
.voice-warn{background:rgba(217,119,6,.1);border:1px solid rgba(217,119,6,.3);color:#92400E;border-radius:12px;
  padding:11px 16px;font-size:.82rem;font-weight:600}

/* ================= LISTENING ================= */
.listen-stage{max-width:700px;margin:0 auto;display:flex;flex-direction:column;gap:18px}
.listen-player{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:26px;text-align:center}
.listen-player .lp-title{font-size:.8rem;color:var(--ink-3);font-weight:700;letter-spacing:.08em;margin-bottom:14px}
.listen-btn{width:82px;height:82px;border-radius:50%;background:var(--grad);color:#fff;font-size:1.9rem;display:grid;
  place-items:center;margin:0 auto;box-shadow:0 16px 34px -10px rgba(79,70,229,.55);transition:transform .15s}
.listen-btn:hover{transform:scale(1.06)}
.listen-btn:disabled{opacity:.6}
.listen-hint{font-size:.8rem;color:var(--ink-3);margin-top:12px}
.speed-pills{display:flex;gap:8px;justify-content:center;margin-top:14px}
.dictation-input{width:100%;background:var(--card);border:2px solid var(--line);border-radius:14px;padding:15px 18px;
  font-family:Georgia,serif;font-size:1.02rem;resize:none;min-height:88px;transition:border-color .15s}
.dictation-input:focus{outline:none;border-color:var(--brand)}
.dictation-result{font-family:Georgia,serif;font-size:1.05rem;line-height:2;background:var(--card);border:1px solid var(--line);
  border-radius:14px;padding:15px 18px}
.listen-stats{display:flex;gap:14px;justify-content:center}
.listen-stats .ls{border-radius:14px;padding:12px 22px;background:var(--bg-soft);text-align:center}
.listen-stats .ls b{font-size:1.25rem;display:block}
.listen-stats .ls span{font-size:.74rem;color:var(--ink-3)}

/* ================= QUIZ ================= */
.quiz-stage{max-width:720px;margin:0 auto}
.quiz-topbar{display:flex;align-items:center;gap:12px;margin-bottom:18px;flex-wrap:wrap}
.quiz-timer{display:inline-flex;align-items:center;gap:7px;font-weight:800;font-variant-numeric:tabular-nums;
  background:var(--card);border:1px solid var(--line);border-radius:999px;padding:7px 15px;font-size:.88rem}
.quiz-timer.danger{color:var(--rose);border-color:rgba(225,29,72,.4);animation:pulse 1s infinite}
.quiz-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius-lg);padding:30px;box-shadow:var(--shadow)}
.quiz-q{font-size:1.08rem;font-weight:700;line-height:1.7;margin:6px 0 20px}
.quiz-q .q-tag{display:inline-block;font-size:.72rem;color:var(--brand);background:var(--grad-soft);padding:2px 10px;
  border-radius:999px;margin-right:8px;vertical-align:middle}
.opt{display:flex;gap:13px;align-items:flex-start;width:100%;text-align:left;background:var(--card-2);border:2px solid var(--line-2);
  border-radius:14px;padding:15px 17px;font-size:.95rem;transition:all .15s;margin-bottom:10px;line-height:1.5}
.opt:hover:not(:disabled){border-color:var(--brand);transform:translateX(4px)}
.opt .opt-letter{flex-shrink:0;width:28px;height:28px;border-radius:9px;background:var(--bg-soft);display:grid;place-items:center;
  font-weight:800;font-size:.82rem}
.opt.picked{border-color:var(--brand);background:var(--grad-soft)}
.opt.right{border-color:var(--accent);background:rgba(22,163,74,.1)}
.opt.wrong{border-color:var(--rose);background:rgba(225,29,72,.08)}
.opt:disabled{cursor:default}
.quiz-exp{background:var(--bg-soft);border-radius:12px;padding:13px 16px;font-size:.85rem;color:var(--ink-2);margin-top:6px;line-height:1.7}
.quiz-exp b{color:var(--accent)}
.quiz-nav{display:flex;justify-content:space-between;gap:10px;margin-top:20px}
.qdots{display:flex;gap:6px;flex-wrap:wrap;margin-top:20px;justify-content:center}
.qdot{width:11px;height:11px;border-radius:4px;background:var(--line)}
.qdot.done{background:var(--accent)}
.qdot.wrong{background:var(--rose)}
.qdot.cur{outline:2px solid var(--brand);outline-offset:2px}

/* ================= DASHBOARD ================= */
.dash-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:20px}
.dash-main{display:grid;grid-template-columns:1.5fr 1fr;gap:18px;margin-bottom:20px}
.panel{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:24px}
.panel h3{font-size:1rem;margin-bottom:16px;display:flex;align-items:center;gap:8px}
.panel h3 .ph-emoji{font-size:1.1rem}
.ach-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:12px}
.ach{display:flex;gap:11px;align-items:center;background:var(--card-2);border:1px solid var(--line-2);border-radius:14px;padding:12px 14px}
.ach.locked{opacity:.45;filter:grayscale(1)}
.ach .a-icon{font-size:1.5rem;flex-shrink:0}
.ach b{font-size:.84rem;display:block}
.ach span{font-size:.72rem;color:var(--ink-3)}
.heat-grid{display:grid;grid-template-columns:repeat(20,1fr);gap:4px}
.heat-cell{aspect-ratio:1;border-radius:4px;background:var(--bg-soft)}
.heat-cell.lv1{background:rgba(99,102,241,.3)}
.heat-cell.lv2{background:rgba(99,102,241,.55)}
.heat-cell.lv3{background:rgba(99,102,241,.78)}
.heat-cell.lv4{background:#4F46E5}
.heat-legend{display:flex;align-items:center;gap:5px;font-size:.72rem;color:var(--ink-3);margin-top:10px;justify-content:flex-end}
.heat-legend i{width:11px;height:11px;border-radius:3px;display:inline-block}
.stat-link{display:flex;flex-direction:column;gap:2px}
.stat-link:hover b{color:var(--brand)}

/* ================= PLAN ================= */
.plan-hero{display:flex;align-items:center;gap:22px;flex-wrap:wrap;margin-bottom:22px}
.plan-ring-wrap{position:relative;width:132px;height:132px;flex-shrink:0}
.plan-ring-wrap .pr-center{position:absolute;inset:0;display:grid;place-items:center;text-align:center}
.plan-ring-wrap .pr-center b{font-size:1.5rem;font-weight:800;line-height:1}
.plan-ring-wrap .pr-center span{font-size:.7rem;color:var(--ink-3)}
.task-list{display:flex;flex-direction:column;gap:12px}
.task{display:flex;align-items:center;gap:15px;background:var(--card);border:1px solid var(--line);border-radius:15px;padding:17px 19px;
  transition:all .18s}
.task.done{opacity:.62}
.task.done .t-title{text-decoration:line-through}
.t-check{flex-shrink:0;width:30px;height:30px;border-radius:10px;border:2px solid var(--line);display:grid;place-items:center;
  font-weight:800;color:#fff;font-size:.85rem;transition:all .15s;background:transparent}
.task.done .t-check{background:var(--accent);border-color:var(--accent)}
.t-icon{flex-shrink:0;width:42px;height:42px;border-radius:12px;background:var(--grad-soft);display:grid;place-items:center;font-size:1.15rem}
.t-body{flex:1;min-width:0}
.t-title{font-weight:700;font-size:.95rem}
.t-sub{font-size:.8rem;color:var(--ink-3)}
.t-xp{margin-left:auto;flex-shrink:0;font-size:.78rem;font-weight:800;color:var(--brand);background:var(--grad-soft);
  padding:4px 11px;border-radius:999px}
@media (max-width:960px){
  .dash-main{grid-template-columns:1fr}
  .dash-grid{grid-template-columns:repeat(2,1fr)}
  .heat-grid{grid-template-columns:repeat(10,1fr)}
}
@media (max-width:640px){
  .dash-grid{grid-template-columns:1fr 1fr}
  .summary-grid{grid-template-columns:repeat(2,1fr)}
  .fc-actions{grid-template-columns:repeat(2,1fr)}
  .heat-grid{grid-template-columns:repeat(7,1fr)}
}

/* ================= 自动运营 ================= */
.ops-banner{position:fixed;top:68px;left:0;right:0;z-index:90;display:flex;justify-content:center;padding:10px 16px;
  animation:fadeUp .35s both}
.ops-banner .ob-inner{display:flex;align-items:center;gap:14px;background:linear-gradient(135deg,#EA580C,#D97706);color:#fff;
  border-radius:14px;padding:11px 18px;box-shadow:0 14px 34px -10px rgba(234,88,12,.55);font-size:.9rem;font-weight:600;max-width:640px}
.ops-banner .ob-text b{font-size:1.05rem}
.ops-banner .ob-text{flex:1}
.ops-banner .btn-primary{background:#fff;color:#C2410C;box-shadow:none}
.ops-banner .ob-close{color:rgba(255,255,255,.85);font-size:.9rem;padding:2px 6px;border-radius:8px}
.ops-banner .ob-close:hover{background:rgba(255,255,255,.2)}
@media (max-width:640px){.ops-banner{top:64px}.ops-banner .ob-inner{flex-wrap:wrap;gap:8px}}
.brief-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
@media (max-width:640px){.brief-grid{grid-template-columns:1fr}}

.ops-log{display:flex;flex-direction:column;gap:2px}
.ops-log-item{display:flex;gap:14px;align-items:flex-start;padding:11px 4px;border-bottom:1px solid var(--line-2);font-size:.86rem}
.ops-log-item:last-child{border-bottom:none}
.ops-log-dot{flex-shrink:0;width:9px;height:9px;border-radius:50%;background:var(--brand);margin-top:8px;box-shadow:0 0 0 4px var(--grad-soft)}
.ops-log-item b{color:var(--brand);margin-right:6px}
.poster-preview{max-width:280px;margin:16px auto 0;border-radius:18px;box-shadow:var(--shadow-lg);display:block}
.feature-card .f-icon{flex-shrink:0}