:root{--primary: #6366f1;--primary-strong: #4f46e5;--primary-press: #4338ca;--primary-soft: #eef1ff;--primary-soft-2: #e3e8ff;--primary-ring: rgba(99, 102, 241, .28);--gradient: linear-gradient(135deg, #6366f1 0%, #7c3aed 100%);--gradient-soft: linear-gradient(135deg, #eef2ff 0%, #f5f0ff 100%);--violet: #7c3aed;--amber: #f59e0b;--green: #16a34a;--blue: #2563eb;--red: #ef4444;--bg: #f4f5fb;--bg-tint: radial-gradient(1200px 600px at 50% -200px, #eaecfb 0%, rgba(244, 245, 251, 0) 70%);--surface: #ffffff;--surface-2: #f8f9fc;--text: #1a1d29;--text-2: #525a6b;--text-3: #8b93a4;--text-4: #b3bac7;--border: #eceef3;--border-strong: #e0e3ec;--r-sm: 8px;--r-md: 12px;--r-lg: 16px;--r-xl: 22px;--r-pill: 999px;--shadow-xs: 0 1px 2px rgba(20, 24, 40, .04);--shadow-sm: 0 1px 3px rgba(20, 24, 40, .05), 0 1px 2px rgba(20, 24, 40, .03);--shadow-md: 0 6px 16px -8px rgba(20, 24, 40, .16), 0 2px 6px -2px rgba(20, 24, 40, .06);--shadow-lg: 0 18px 40px -16px rgba(28, 27, 84, .28), 0 4px 12px -6px rgba(20, 24, 40, .08);--shadow-primary: 0 10px 24px -10px rgba(99, 102, 241, .6);--ipa-font: "Charis SIL", "Doulos SIL", "Gentium Plus", "Lucida Sans Unicode", system-ui, sans-serif;--header-h: 62px;--maxw: 1080px;--header-bg: rgba(255, 255, 255, .82);--nav-bg: rgba(255, 255, 255, .92);--brand: #312e81;color-scheme:light}:root[data-theme=dark]{--primary: #818cf8;--primary-strong: #a5b4fc;--primary-press: #c7d2fe;--primary-soft: #20233a;--primary-soft-2: #2a2e4a;--primary-ring: rgba(129, 140, 248, .36);--gradient: linear-gradient(135deg, #4338ca 0%, #6d28d9 100%);--gradient-soft: linear-gradient(135deg, #20233a 0%, #2a2340 100%);--violet: #a78bfa;--amber: #fbbf24;--green: #34d399;--blue: #60a5fa;--red: #f87171;--bg: #0e0f14;--bg-tint: radial-gradient(1200px 600px at 50% -200px, #1b1d31 0%, rgba(14, 15, 20, 0) 70%);--surface: #181a21;--surface-2: #1f222b;--text: #e6e8ee;--text-2: #a8b0be;--text-3: #79818f;--text-4: #565d6b;--border: #272a33;--border-strong: #363b47;--shadow-xs: 0 1px 2px rgba(0, 0, 0, .3);--shadow-sm: 0 1px 3px rgba(0, 0, 0, .4), 0 1px 2px rgba(0, 0, 0, .3);--shadow-md: 0 6px 16px -8px rgba(0, 0, 0, .55), 0 2px 6px -2px rgba(0, 0, 0, .4);--shadow-lg: 0 18px 40px -16px rgba(0, 0, 0, .65), 0 4px 12px -6px rgba(0, 0, 0, .45);--shadow-primary: 0 6px 18px -10px rgba(0, 0, 0, .7);--header-bg: rgba(18, 20, 26, .8);--nav-bg: rgba(18, 20, 26, .9);--brand: #c7d2fe;color-scheme:dark}:root[data-theme=dark] .auth-warn{background:#2a2410;border-color:#50421b;color:#f0c674}:root[data-theme=dark] .phrase-scene{background:#a78bfa29}:root[data-theme=dark] .btn--primary:hover{box-shadow:0 10px 24px -12px #000000bf}*,*:before,*:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Hiragino Sans GB,Microsoft YaHei,Roboto,Helvetica,Arial,sans-serif;color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}a{color:var(--primary-strong);text-decoration:none}a:hover{text-decoration:underline}button{font-family:inherit}button:disabled{opacity:.5;cursor:not-allowed!important}input,textarea,select{font-family:inherit}::selection{background:var(--primary-soft-2)}h1,h2,h3,h4,p{margin:0}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1.5px solid transparent;border-radius:var(--r-md);padding:10px 18px;font-size:14px;font-weight:650;line-height:1;cursor:pointer;white-space:nowrap;transition:transform .12s ease,box-shadow .16s ease,background .16s ease,border-color .16s ease,color .16s ease;-webkit-tap-highlight-color:transparent;-webkit-user-select:none;user-select:none}.btn:active{transform:translateY(1px)}.btn:focus-visible{outline:3px solid var(--primary-ring);outline-offset:1px}.btn--primary{background:var(--gradient);color:#fff;box-shadow:var(--shadow-primary)}.btn--primary:hover{filter:brightness(1.05);box-shadow:0 12px 28px -10px #6366f1b3}.btn--outline{background:var(--surface);color:var(--primary-strong);border-color:var(--border-strong)}.btn--outline:hover{border-color:var(--primary);background:var(--primary-soft)}.btn--ghost{background:transparent;color:var(--text-2)}.btn--ghost:hover{background:var(--surface-2);color:var(--text)}.btn--danger{background:var(--surface);color:var(--red);border-color:#f6cccc}.btn--danger:hover{background:#fef2f2;border-color:var(--red)}.btn--lg{padding:15px 26px;font-size:16px;border-radius:var(--r-lg)}.btn--sm{padding:7px 13px;font-size:13px;border-radius:var(--r-sm)}.btn--block{width:100%}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--r-lg);box-shadow:var(--shadow-sm)}.input{width:100%;padding:12px 14px;border:1.5px solid 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ease;-webkit-tap-highlight-color:transparent}.segmented__btn:hover{color:var(--text)}.segmented__btn.is-active{background:var(--surface);color:var(--primary-strong);box-shadow:var(--shadow-xs)}.badge{display:inline-flex;align-items:center;font-size:11.5px;font-weight:650;border-radius:var(--r-pill);padding:3px 9px;line-height:1.4}.muted{color:var(--text-3)}.kbd{display:inline-block;font-size:11px;font-weight:600;color:var(--text-3);background:var(--surface-2);border:1px solid var(--border-strong);border-bottom-width:2px;border-radius:5px;padding:1px 6px;line-height:1.5}.app{min-height:100vh;min-height:100dvh;display:flex;flex-direction:column;background-image:var(--bg-tint);background-repeat:no-repeat}.app-header{position:sticky;top:0;z-index:100;background:var(--header-bg);backdrop-filter:saturate(180%) blur(14px);-webkit-backdrop-filter:saturate(180%) blur(14px);border-bottom:1px solid var(--border)}.app-header__inner{max-width:var(--maxw);margin:0 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svg{width:18px;height:18px}.app-header__right{display:flex;align-items:center;gap:6px}.fs-btn{display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;border-radius:var(--r-md);border:none;background:transparent;color:var(--text-2);cursor:pointer;transition:background .15s ease,color .15s ease;-webkit-tap-highlight-color:transparent}.fs-btn:hover{color:var(--text);background:var(--surface-2)}.fs-btn svg{width:19px;height:19px}.app.is-fullscreen .app-header,.app.is-fullscreen .bottom-nav{display:none}.app.is-fullscreen .app-main{padding-top:24px;padding-bottom:32px}.fs-exit{position:fixed;top:calc(12px + env(safe-area-inset-top));right:calc(12px + env(safe-area-inset-right));z-index:150;display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;border-radius:var(--r-pill);border:1px solid var(--border);background:var(--surface);color:var(--text-2);cursor:pointer;box-shadow:var(--shadow-md);opacity:.5;transition:opacity .15s ease,color .15s ease,background .15s ease;-webkit-tap-highlight-color:transparent}.fs-exit:hover{opacity:1;color:var(--text);background:var(--surface-2)}.fs-exit svg{width:20px;height:20px}.app-main{flex:1;width:100%;max-width:var(--maxw);margin:0 auto;padding:32px 20px 48px}.bottom-nav{display:none}@media (max-width: 720px){:root{--header-h: 56px}.app-header__inner{padding:0 16px}.nav{display:none}.app-main{padding:20px 16px calc(78px + env(safe-area-inset-bottom))}.bottom-nav{display:flex;position:fixed;bottom:0;left:0;right:0;z-index:100;background:var(--nav-bg);backdrop-filter:saturate(180%) blur(14px);-webkit-backdrop-filter:saturate(180%) blur(14px);border-top:1px solid var(--border);padding:6px 6px calc(6px + env(safe-area-inset-bottom))}.bottom-nav__item{flex:1;display:flex;flex-direction:column;align-items:center;gap:3px;padding:6px 0;font-size:11px;font-weight:600;color:var(--text-3);border-radius:var(--r-md);transition:color .15s 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ease}.master-btn:hover{background:var(--violet);color:#fff;border-color:var(--violet)}.unmaster-btn{font-size:12.5px;font-weight:600;color:var(--text-2);background:var(--surface);border:1.5px solid var(--border-strong);border-radius:var(--r-sm);padding:6px 12px;cursor:pointer;transition:all .15s ease}.unmaster-btn:hover{border-color:var(--text-4);background:var(--surface-2)}.chevron{color:var(--text-4);font-size:12px;width:12px;transition:transform .15s ease}.word-detail{padding:4px 16px 18px;border-top:1px solid var(--border)}.pager{display:flex;justify-content:center;align-items:center;gap:14px;margin-top:24px;flex-wrap:wrap}.jump-wrap{display:flex;align-items:center;gap:6px;font-size:14px;color:var(--text-3)}.jump-input{width:62px;padding:8px 10px;border:1.5px solid var(--border-strong);border-radius:var(--r-sm);font-size:14px;text-align:center;outline:none}.jump-input:focus{border-color:var(--primary)}@media (max-width: 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var(--border)}.about-ratings__item:first-of-type{border-top:none}.about-ratings__dot{width:9px;height:9px;border-radius:50%;margin-top:5px;flex-shrink:0}.about-ratings__name{font-size:14px;font-weight:650;color:var(--text)}.about-ratings__effect{font-size:13px;color:var(--text-2);line-height:1.6;margin-top:2px}.about-cta{text-align:center;padding:10px 0 8px}.row-wrap{flex-wrap:wrap}.fade-in{animation:fade-in .2s ease}