@import "https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=Noto+Sans+SC:wght@400;500;700;900&family=Ma+Shan+Zheng&display=swap";
:root{--bg-primary:#0b0f19;--bg-secondary:#111827;--bg-tertiary:#1f293d;--bg-card:#111827bf;--bg-card-hover:#1f293dd9;--border-subtle:#ffffff14;--border-active:#e11d4866;--border-glow:#6366f14d;--text-primary:#f9fafb;--text-secondary:#9ca3af;--text-muted:#6b7280;--text-chinese:#fecdd3;--accent-crimson:#e11d48;--accent-crimson-hover:#be123c;--accent-crimson-light:#e11d4826;--accent-gold:#f59e0b;--accent-gold-light:#f59e0b26;--accent-emerald:#10b981;--accent-emerald-light:#10b98126;--accent-indigo:#6366f1;--accent-indigo-light:#6366f126;--accent-sky:#0ea5e9;--font-main:"Inter", system-ui, -apple-system, sans-serif;--font-hanzi:"Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;--font-calligraphy:"Ma Shan Zheng", "Noto Sans SC", cursive;--shadow-sm:0 2px 8px #0006;--shadow-md:0 8px 24px #00000080;--shadow-lg:0 16px 36px #0009;--shadow-crimson:0 0 25px #e11d4840;--radius-sm:8px;--radius-md:14px;--radius-lg:20px;--radius-full:9999px}*{box-sizing:border-box;margin:0;padding:0}html,body{background-color:var(--bg-primary);color:var(--text-primary);font-family:var(--font-main);-webkit-font-smoothing:antialiased;min-height:100vh;overflow-x:hidden}body:before{content:"";pointer-events:none;z-index:0;background:radial-gradient(circle,#e11d4814 0%,#6366f10f 50%,#0000 80%);width:70vw;height:40vw;position:fixed;top:-10vw;left:50%;transform:translate(-50%)}a{color:inherit;text-decoration:none}button{cursor:pointer;color:inherit;background:0 0;border:none;font-family:inherit}.glass-panel{background:var(--bg-card);-webkit-backdrop-filter:blur(16px);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);box-shadow:var(--shadow-md);transition:border-color .25s,transform .25s,box-shadow .25s}.glass-panel:hover{border-color:#ffffff24}.glass-card{background:var(--bg-card);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border:1px solid var(--border-subtle);border-radius:var(--radius-md);padding:20px;transition:all .25s}.glass-card:hover{background:var(--bg-card-hover);border-color:var(--border-active);box-shadow:var(--shadow-crimson);transform:translateY(-2px)}.hero-banner{border-radius:var(--radius-lg);box-shadow:var(--shadow-md);background:radial-gradient(at 100% 0,#e11d482e,#111827e6 70%);border:1px solid #e11d4840;padding:36px 32px;transition:all .25s;position:relative;overflow:hidden}.hero-banner-sky{border-radius:var(--radius-lg);box-shadow:var(--shadow-md);background:radial-gradient(at 100% 0,#0ea5e92e,#111827e6 70%);border:1px solid #0ea5e940;padding:36px 32px;transition:all .25s;position:relative;overflow:hidden}.watermark-hanzi{font-size:15rem;font-weight:900;font-family:var(--font-calligraphy);color:#ffffff08;-webkit-user-select:none;user-select:none;pointer-events:none;line-height:1;transition:color .25s;position:absolute;bottom:-40px;right:-10px}.inner-spotlight-box{background:#00000059;border:1px solid #ffffff0f;border-radius:16px;justify-content:space-between;align-items:center;padding:16px 20px;transition:all .2s;display:flex}.feature-bullet-item{background:#ffffff08;border:1px solid #ffffff0a;border-radius:10px;align-items:flex-start;gap:10px;padding:10px 12px;transition:all .2s;display:flex}.srs-flashcard{cursor:pointer;-webkit-user-select:none;user-select:none;background:linear-gradient(145deg,#1a2234d9,#111827f2);border:1px solid #ffffff1a;border-radius:24px;flex-direction:column;justify-content:center;align-items:center;min-height:340px;padding:32px 24px;transition:all .3s;display:flex;position:relative;box-shadow:0 12px 32px #00000080}.srs-flashcard.flipped{border-color:#e11d4866}.font-hanzi{font-family:var(--font-hanzi)}.font-calligraphy{font-family:var(--font-calligraphy)}.gradient-text{background:linear-gradient(135deg,#fff 0%,#f43f5e 60%,#fb7185 100%);-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text}.gradient-gold-text{background:linear-gradient(135deg,#fef08a 0%,#f59e0b 60%,#d97706 100%);-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text}.badge{border-radius:var(--radius-full);letter-spacing:.03em;text-transform:uppercase;align-items:center;gap:6px;padding:4px 10px;font-size:.75rem;font-weight:600;display:inline-flex}.badge-crimson{background:var(--accent-crimson-light);color:#fb7185;border:1px solid #e11d484d}.badge-gold{background:var(--accent-gold-light);color:#fbbf24;border:1px solid #f59e0b4d}.badge-emerald{background:var(--accent-emerald-light);color:#34d399;border:1px solid #10b9814d}.badge-indigo{background:var(--accent-indigo-light);color:#818cf8;border:1px solid #6366f14d}.btn-primary{background:linear-gradient(135deg, var(--accent-crimson) 0%, #be123c 100%);color:#fff;border-radius:var(--radius-md);justify-content:center;align-items:center;gap:8px;padding:10px 20px;font-size:.95rem;font-weight:600;transition:all .2s;display:inline-flex;box-shadow:0 4px 14px #e11d4859}.btn-primary:hover{background:linear-gradient(135deg, #f43f5e 0%, var(--accent-crimson) 100%);transform:translateY(-1px);box-shadow:0 6px 20px #e11d4880}.btn-secondary{border:1px solid var(--border-subtle);color:var(--text-primary);border-radius:var(--radius-md);background:#ffffff0f;justify-content:center;align-items:center;gap:8px;padding:10px 20px;font-size:.95rem;font-weight:500;transition:all .2s;display:inline-flex}.btn-secondary:hover{background:#ffffff1f;border-color:#fff3}.btn-gold{color:#fbbf24;border-radius:var(--radius-md);background:#f59e0b26;border:1px solid #f59e0b59;justify-content:center;align-items:center;gap:8px;padding:10px 20px;font-size:.95rem;font-weight:600;transition:all .2s;display:inline-flex}.btn-gold:hover{background:#f59e0b40;border-color:#f59e0b80;transform:translateY(-1px)}.audio-btn{color:#e5e7eb;cursor:pointer;background-color:#ffffff0f;border:1px solid #ffffff1a;border-radius:8px;align-items:center;gap:6px;padding:6px 12px;font-size:.85rem;font-weight:500;transition:all .2s;display:inline-flex}.audio-btn:hover{color:#fff;background-color:#ffffff1f}.audio-btn.speaking{color:#fb7185;background-color:#e11d4833;border-color:#e11d4866}.tianzige{background-color:#111827e6;border:2px solid #e11d4866;border-radius:12px;position:relative;overflow:hidden;box-shadow:inset 0 0 20px #0009}.tianzige:before{content:"";pointer-events:none;border-left:1px dashed #e11d4833;width:1px;position:absolute;top:0;bottom:0;left:50%}.tianzige:after{content:"";pointer-events:none;border-top:1px dashed #e11d4833;height:1px;position:absolute;top:50%;left:0;right:0}@keyframes pulseGlow{0%,to{opacity:.4}50%{opacity:.8}}.animate-pulse-glow{animation:3s ease-in-out infinite pulseGlow}.nav-container{z-index:50;-webkit-backdrop-filter:blur(16px);border-bottom:1px solid var(--border-subtle);background:#0b0f19e6;width:100%;position:sticky;top:0}.nav-content{justify-content:space-between;align-items:center;gap:16px;max-width:1280px;height:62px;margin:0 auto;padding:0 20px;display:flex}.nav-links{scrollbar-width:none;flex-shrink:1;align-items:center;gap:6px;display:flex;overflow-x:auto}.nav-links::-webkit-scrollbar{display:none}.nav-link{color:var(--text-secondary);white-space:nowrap;-webkit-user-select:none;user-select:none;border:1px solid #0000;border-radius:10px;align-items:center;gap:7px;padding:8px 13px;font-size:.88rem;font-weight:500;line-height:1;transition:all .18s;display:inline-flex}.nav-link:hover{color:var(--text-primary);background:#ffffff0f;border-color:#ffffff14}.nav-link.active{color:#fb7185;background:#e11d4824;border:1px solid #e11d4859;font-weight:600;box-shadow:0 0 14px #e11d482e}.nav-dropdown-wrapper{align-items:center;display:inline-flex;position:relative}.nav-dropdown-menu{-webkit-backdrop-filter:blur(20px);opacity:0;visibility:hidden;z-index:100;background:#0f172af7;border:1px solid #ffffff1f;border-radius:14px;flex-direction:column;gap:3px;min-width:290px;padding:8px;transition:opacity .18s,transform .18s,visibility .18s;display:flex;position:absolute;top:calc(100% + 8px);left:0;transform:translateY(-6px);box-shadow:0 18px 40px #0009,0 0 0 1px #ffffff0d}.nav-dropdown-menu:before{content:"";height:10px;position:absolute;top:-10px;left:0;right:0}.nav-dropdown-wrapper:hover .nav-dropdown-menu,.nav-dropdown-wrapper:focus-within .nav-dropdown-menu,.nav-dropdown-wrapper.open .nav-dropdown-menu{opacity:1;visibility:visible;transform:translateY(0)}.nav-dropdown-item{color:var(--text-secondary);border-radius:10px;align-items:center;gap:12px;padding:10px 12px;text-decoration:none;transition:all .15s;display:flex}.nav-dropdown-item:hover{color:#fff;background:#ffffff0f}.nav-dropdown-item.active{color:#fb7185;background:#e11d481f}.nav-dropdown-icon{border-radius:8px;flex-shrink:0;justify-content:center;align-items:center;width:32px;height:32px;display:flex}.nav-dropdown-title{color:#fff;font-size:.86rem;font-weight:600;line-height:1.25}.nav-dropdown-desc{color:var(--text-secondary);margin-top:2px;font-size:.72rem;line-height:1.3}.theme-toggle-btn{border:1px solid var(--border-subtle);color:var(--text-primary);cursor:pointer;-webkit-user-select:none;user-select:none;background:#ffffff12;border-radius:9999px;flex-shrink:0;align-items:center;gap:6px;padding:5px 11px;font-size:.78rem;font-weight:600;transition:all .2s cubic-bezier(.16,1,.3,1);display:inline-flex}.theme-toggle-btn:hover{background:#ffffff24;border-color:#fff3;transform:translateY(-1px)}.theme-toggle-icon{justify-content:center;align-items:center;transition:transform .25s;display:flex}.theme-toggle-btn:hover .theme-toggle-icon{transform:rotate(15deg)scale(1.1)}[data-theme=light]{--bg-primary:#f8fafc;--bg-secondary:#fff;--bg-tertiary:#f1f5f9;--bg-card:#fff;--bg-card-hover:#f8fafc;--border-subtle:#00000014;--border-active:#e11d4866;--border-glow:#e11d4826;--text-primary:#0f172a;--text-secondary:#475569;--text-muted:#64748b;--text-chinese:#be123c;--shadow-sm:0 1px 3px #0000000f;--shadow-md:0 4px 16px -2px #0000000f, 0 2px 4px -2px #00000008;--shadow-lg:0 12px 28px -4px #00000014, 0 4px 8px -2px #0000000a;--shadow-crimson:0 6px 20px -3px #e11d4826}[data-theme=light] body:before{background:radial-gradient(circle,#e11d480d 0%,#6366f10a 50%,#0000 80%)}[data-theme=light] .glass-panel{background:#fff;border-color:#00000012;box-shadow:0 4px 20px -2px #0000000d}[data-theme=light] .glass-panel:hover{border-color:#00000024}[data-theme=light] .glass-card{box-shadow:0 2px 10px #0000000a;background:#fff!important;border:1px solid #00000012!important}[data-theme=light] .glass-card:hover{transform:translateY(-2px);box-shadow:0 10px 24px -4px #e11d481a;background:#fff!important;border-color:#e11d4859!important}[data-theme=light] .card-interactive{box-shadow:0 4px 16px #0000000a;background:#fff!important;border-color:#00000012!important}[data-theme=light] .card-interactive:hover{box-shadow:0 10px 28px #e11d481a;background:#fff!important;border-color:#e11d4859!important}[data-theme=light] .hero-banner{box-shadow:0 10px 30px -5px #e11d480f,0 1px 3px #00000008;background:linear-gradient(135deg,#fff1f2 0%,#fff 50%,#f8fafc 100%)!important;border:1px solid #e11d4829!important}[data-theme=light] .hero-banner-sky{box-shadow:0 10px 30px -5px #0ea5e90f,0 1px 3px #00000008;background:linear-gradient(135deg,#f0f9ff 0%,#fff 50%,#f8fafc 100%)!important;border:1px solid #0ea5e933!important}[data-theme=light] .watermark-hanzi{color:#e11d480d!important}[data-theme=light] .inner-spotlight-box{box-shadow:inset 0 1px 2px #00000005;background:#f8fafc!important;border:1px solid #00000012!important}[data-theme=light] .feature-bullet-item{background:#f8fafc!important;border:1px solid #0000000f!important}[data-theme=light] .srs-flashcard{background:linear-gradient(145deg,#fff 0%,#f8fafc 100%)!important;border:1px solid #00000017!important;box-shadow:0 12px 30px #00000012!important}[data-theme=light] .srs-flashcard.flipped{border-color:#e11d4866!important;box-shadow:0 14px 36px #e11d481f!important}[data-theme=light] .gradient-text{background:linear-gradient(135deg,#9f1239 0%,#e11d48 55%,#f43f5e 100%)!important;-webkit-text-fill-color:transparent!important;-webkit-background-clip:text!important;background-clip:text!important}[data-theme=light] .gradient-gold-text{background:linear-gradient(135deg,#92400e 0%,#d97706 50%,#f59e0b 100%)!important;-webkit-text-fill-color:transparent!important;-webkit-background-clip:text!important;background-clip:text!important}[data-theme=light] .badge-crimson{color:#be123c!important;background:#fff1f2!important;border:1px solid #fecdd3!important}[data-theme=light] .badge-gold{color:#b45309!important;background:#fffbeb!important;border:1px solid #fde68a!important}[data-theme=light] .badge-emerald{color:#047857!important;background:#ecfdf5!important;border:1px solid #a7f3d0!important}[data-theme=light] .badge-indigo{color:#4338ca!important;background:#eef2ff!important;border:1px solid #c7d2fe!important}[data-theme=light] .badge-sky{color:#0369a1!important;background:#f0f9ff!important;border:1px solid #bae6fd!important}[data-theme=light] .btn-secondary{box-shadow:0 1px 3px #0000000a;color:#1e293b!important;background:#fff!important;border-color:#0000001f!important}[data-theme=light] .btn-secondary:hover{color:#0f172a!important;background:#f8fafc!important;border-color:#0003!important}[data-theme=light] .btn-gold{box-shadow:0 1px 3px #f59e0b1a;color:#b45309!important;background:#fffbeb!important;border:1px solid #fde68a!important}[data-theme=light] .btn-gold:hover{color:#92400e!important;background:#fef3c7!important;border-color:#fcd34d!important}[data-theme=light] .audio-btn{color:#334155!important;background-color:#f1f5f9!important;border-color:#0000001a!important}[data-theme=light] .audio-btn:hover{color:#0f172a!important;background-color:#e2e8f0!important}[data-theme=light] .audio-btn.speaking{color:#e11d48!important;background-color:#ffe4e6!important;border-color:#fda4af!important}[data-theme=light] .tianzige{background-color:#fff!important;border-color:#e11d4859!important;box-shadow:inset 0 0 15px #00000008!important}[data-theme=light] .tianzige:before{border-left-color:#e11d4833!important}[data-theme=light] .tianzige:after{border-top-color:#e11d4833!important}[data-theme=light] .nav-container{background:#fffffff0;border-bottom:1px solid #00000014}[data-theme=light] .nav-link{color:#475569}[data-theme=light] .nav-link:hover{color:#0f172a;background:#0000000a;border-color:#0000000f}[data-theme=light] .nav-dropdown-menu{background:#fffffffa;border:1px solid #0000001a;box-shadow:0 18px 40px #0000001f,0 0 0 1px #0000000a}[data-theme=light] .nav-dropdown-title{color:#0f172a}[data-theme=light] .nav-dropdown-item{color:#475569}[data-theme=light] .nav-dropdown-item:hover{color:#0f172a;background:#0000000a}[data-theme=light] .theme-toggle-btn{color:#0f172a;background:#0000000d;border-color:#0000001a}[data-theme=light] .theme-toggle-btn:hover{background:#00000017;border-color:#00000029}[data-theme=light] .tian-grid-canvas{background-color:#fff;box-shadow:inset 0 0 15px #0000000a}.hero-split-grid{grid-template-columns:1.25fr .95fr;align-items:center;gap:36px;display:grid}@media (max-width:920px){.hero-split-grid{grid-template-columns:1fr;gap:28px}}.live-hanzi-card{background:var(--bg-card);-webkit-backdrop-filter:blur(16px);border:1px solid var(--border-subtle);box-shadow:var(--shadow-md);border-radius:20px;padding:24px;transition:all .25s;position:relative}[data-theme=light] .live-hanzi-card{background:#fff!important;border:1px solid #e11d4829!important;box-shadow:0 14px 34px -4px #e11d4814,0 2px 6px #00000008!important}.stat-bento-tile{background:var(--bg-card);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border:1px solid var(--border-subtle);justifyContent:space-between;border-radius:16px;flex-direction:column;padding:18px 20px;transition:all .2s;display:flex}.stat-bento-tile:hover{box-shadow:var(--shadow-sm);border-color:var(--border-active);transform:translateY(-2px)}[data-theme=light] .stat-bento-tile{box-shadow:0 2px 8px #00000008;background:#fff!important;border:1px solid #00000012!important}[data-theme=light] .stat-bento-tile:hover{border-color:#e11d484d!important;box-shadow:0 8px 20px -2px #e11d4814!important}.bento-interactive-card{background:var(--bg-card);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border:1px solid var(--border-subtle);justifyContent:space-between;border-radius:20px;flex-direction:column;padding:24px;transition:all .25s;display:flex;position:relative;overflow:hidden}.bento-interactive-card:hover{box-shadow:var(--shadow-md);border-color:var(--border-active);transform:translateY(-3px)}[data-theme=light] .bento-interactive-card{box-shadow:0 4px 16px #0000000a;background:#fff!important;border:1px solid #00000012!important}[data-theme=light] .bento-interactive-card:hover{border-color:#e11d4859!important;box-shadow:0 12px 30px -4px #e11d481a!important}