:root{--paper: #ffffff;--sky: #F7F4EB;--sky-tint: #EFECE2;--sky-tint-2: #E5E1D5;--line: #E2DDCF;--line-strong: #CDC7B5;--ink: #0b1f3a;--ink-soft: #1e3a63;--slate: #52657f;--slate-dim: #8496ae;--navy: #0e3d80;--blue: #2f6fe4;--blue-hover: #1f5bcb;--blue-soft: #eaf2fe;--danger: #d65b76;--success: #1e9e76;--radius-sm: 8px;--radius-md: 12px;--radius-lg: 20px;--font-display: "Lexend", "Inter", sans-serif;--font-ui: "Inter", -apple-system, "Segoe UI", sans-serif;--font-paper: "Times New Roman", Times, serif;--sig-none: #8B9BB4;--sig-options: #2563EB;--sig-questions:#D94A6E;--sig-all: #109B6E;--sig-correct: #BE2A47;--g0-bg:#EEF2F6;--g0-ink:#4E5D73;--g0-border:#D8E0EB;--g0-dot:#8B9BB4;--g1-bg:#FDF0F3;--g1-ink:#B32646;--g1-border:#F7CBD5;--g1-dot:#D94A6E;--g2-bg:#EBF3FE;--g2-ink:#1A4FC4;--g2-border:#CCE0FC;--g2-dot:#2563EB;--g3-bg:#EAF7F1;--g3-ink:#107954;--g3-border:#C5EBD9;--g3-dot:#109B6E}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:#94a3b847;border-radius:10px}::-webkit-scrollbar-thumb:hover{background:#94a3b873}*{scrollbar-width:thin;scrollbar-color:rgba(148,163,184,.28) transparent}*{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{background:var(--sky);color:var(--ink);line-height:1.5;font-family:var(--font-ui);-webkit-font-smoothing:antialiased}button,input,select{font-family:inherit}button{cursor:pointer}:focus-visible{outline:2px solid var(--blue);outline-offset:2px}.screen{display:none}.screen.is-active{display:block;animation:screenEnter .4s cubic-bezier(.16,1,.3,1)}@keyframes screenEnter{0%{transform:translateY(10px);opacity:0}to{transform:translateY(0);opacity:1}}@keyframes fadeIn{0%{transform:translateY(6px);opacity:0}to{transform:translateY(0);opacity:1}}@keyframes fadeInUpSoft{0%{opacity:0;transform:translateY(16px)}to{opacity:1;transform:translateY(0)}}@keyframes scaleInSoft{0%{opacity:0;transform:scale(.96) translateY(12px)}to{opacity:1;transform:scale(1) translateY(0)}}@keyframes floatSoft{0%,to{transform:translateY(0)}50%{transform:translateY(-6px)}}#screen-upload .hero-text h1{animation:fadeInUpSoft .6s cubic-bezier(.16,1,.3,1) .05s both}#screen-upload .hero-text p.lede{animation:fadeInUpSoft .6s cubic-bezier(.16,1,.3,1) .12s both}#screen-upload .dropzone{animation:fadeInUpSoft .6s cubic-bezier(.16,1,.3,1) .2s both}#screen-upload .feature-list{animation:fadeInUpSoft .6s cubic-bezier(.16,1,.3,1) .28s both}#screen-upload .hero-art{animation:scaleInSoft .75s cubic-bezier(.16,1,.3,1) .15s both}#screen-upload .hero-art svg{animation:floatSoft 6s ease-in-out infinite}.topbar{position:sticky;top:0;z-index:100;border-bottom:1px solid var(--line);background:#fff;padding:14px 32px;padding-top:max(14px,env(safe-area-inset-top,14px))}.topbar-inner{display:flex;justify-content:space-between;align-items:center;gap:24px;margin:0 auto;max-width:1200px}.brand{display:flex;align-items:center;gap:10px;cursor:pointer;color:var(--navy);font-weight:700;font-size:1.15rem;font-family:var(--font-display);text-decoration:none}.brand-mark{display:flex;justify-content:center;align-items:center;border-radius:9px;background:var(--blue);width:32px;height:32px;color:#fff;font-weight:700;font-size:.85rem}.brand-logo-img{height:36px;width:auto;object-fit:contain;display:block}.topnav-links{display:flex;align-items:center;gap:6px}.topnav-links a{transition:background .15s,color .15s;border-radius:20px;padding:8px 18px;color:var(--slate);font-weight:500;font-size:.92rem;text-decoration:none}.topnav-links a:hover{background:var(--sky-tint);color:var(--navy)}.topnav-links a.active{background:var(--blue-soft);color:var(--blue);font-weight:700}.mobile-menu{display:none;border:1px solid var(--line);border-radius:8px;background:var(--sky-tint);padding:8px 14px;color:var(--blue);font-weight:600;font-size:.9rem}.hero{display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:48px;margin:0 auto;padding:56px 32px 40px;max-width:1240px;min-height:calc(100vh - 75px)}.hero-text h1{max-width:16ch;color:var(--ink);font-weight:700;font-size:clamp(2.1rem,3.4vw,2.9rem);line-height:1.35;font-family:var(--font-display);letter-spacing:-.03em}.hero-text h1 em{color:var(--blue);font-style:normal}.hero-text p.lede{margin-top:16px;max-width:48ch;color:var(--slate);font-size:1.02rem;line-height:1.65}.dropzone{display:flex;position:relative;align-items:center;gap:20px;transition:border-color .2s,background .2s,transform .2s;margin-top:28px;border:2px dashed var(--line-strong);border-radius:var(--radius-lg);background:var(--paper);padding:24px 22px}.dropzone:hover,.dropzone.dragover{transform:translateY(-2px);border-color:var(--blue);background:var(--sky-tint)}.dropzone-icon{display:flex;flex:none;justify-content:center;align-items:center;border-radius:14px;background:var(--sky-tint);width:50px;height:50px;color:var(--blue)}.dropzone-body{flex:1;min-width:0}.dropzone-body p.title{color:var(--ink);font-weight:600;font-size:.96rem}.dropzone-body p.sub{margin-top:2px;color:var(--slate-dim);font-size:.84rem}.btn-primary{display:inline-block;flex:none;transition:background .15s,transform .15s;cursor:pointer;border:none;border-radius:30px;background:var(--blue);padding:12px 24px;color:#fff;font-weight:700;font-size:.92rem;text-align:center;text-decoration:none}.btn-primary:hover{transform:translateY(-1px);background:var(--blue-hover)}input[type=file]{display:none}.sample-card{margin-top:18px;border:1.5px solid var(--line-strong);border-radius:var(--radius-lg);background:var(--paper);padding:18px 22px;display:flex;flex-direction:column;gap:14px}.sample-card-head{display:flex;align-items:center;justify-content:space-between;gap:12px}.sample-title-wrap{display:flex;align-items:center;gap:12px}.sample-badge-icon{display:flex;align-items:center;justify-content:center;width:38px;height:38px;border-radius:10px;background:var(--sky-tint);color:var(--blue);flex-shrink:0}.sample-card-head .title{font-weight:700;font-size:.96rem;color:var(--ink);font-family:var(--font-display)}.sample-card-head .sub{font-size:.82rem;color:var(--slate);margin-top:1px}.sample-chip{display:inline-flex;align-items:center;gap:6px;padding:4px 10px;border-radius:20px;background:var(--sky-tint);color:var(--navy);font-size:.76rem;font-weight:700;letter-spacing:.02em;white-space:nowrap}.sample-controls{display:flex;gap:12px;align-items:center}.sample-select-wrapper{position:relative;flex:1;min-width:0;width:100%}.sample-select{width:100%;appearance:none;-webkit-appearance:none;border:1.5px solid var(--line-strong);border-radius:12px;background:#fff;padding:10px 42px 10px 16px;font-size:16px;font-weight:600;color:var(--ink);outline:none;cursor:pointer;box-shadow:0 1px 4px #0b1f3a0a;transition:border-color .2s,box-shadow .2s}.sample-select:hover{border-color:var(--blue)}.sample-select:focus{border-color:var(--blue);box-shadow:0 0 0 3px #2563eb26}.sample-select optgroup{font-weight:700;color:var(--slate);font-size:.78rem;letter-spacing:.04em;background:#f1f5f9;padding:6px 10px}.sample-select option{font-weight:500;color:var(--ink);font-size:.92rem;padding:8px 12px;background:#fff}.sample-select-wrapper:after{content:"";position:absolute;right:15px;top:50%;transform:translateY(-50%);width:12px;height:7px;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 7' fill='none'%3E%3Cpath d='M1 1.5L6 5.5L11 1.5' stroke='%23475569' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:center;pointer-events:none}.btn-download-sample{display:inline-flex;align-items:center;justify-content:center;gap:8px;flex:none;cursor:pointer;border:none;border-radius:12px;background:var(--blue);padding:10px 22px;color:#fff;font-size:.92rem;font-weight:700;white-space:nowrap;box-shadow:0 2px 8px #2563eb40;transition:background .2s,transform .15s,box-shadow .2s}.btn-download-sample:hover{background:#1d4ed8;transform:translateY(-1px);box-shadow:0 4px 12px #2563eb59}.feature-list{display:flex;flex-direction:column;gap:12px;margin-top:26px}.feature-item{display:flex;align-items:flex-start;gap:12px;transition:transform .2s;border-left:2px solid var(--line-strong);padding-left:14px}.feature-item:hover{transform:translate(4px);border-left-color:var(--blue)}.feature-item .fi-icon{flex:none;margin-top:2px;color:var(--blue)}.feature-item .fi-title{color:var(--ink);font-weight:600;font-size:.91rem}.feature-item .fi-sub{margin-top:1px;color:var(--slate-dim);font-size:.82rem}.hero-art{display:flex;justify-content:center;align-items:center}.hero-art svg{width:100%;max-width:520px;height:auto}.hero-scroll-hint-wrap{grid-column:1 / -1;display:flex;justify-content:center;padding-top:20px;padding-bottom:8px}.scroll-down-btn{display:inline-flex;align-items:center;gap:8px;padding:10px 24px;border-radius:30px;background:var(--paper);border:1.5px solid var(--line-strong);color:var(--slate);font-size:.88rem;font-weight:600;text-decoration:none;transition:all .2s cubic-bezier(.16,1,.3,1);box-shadow:0 2px 8px #0b1f3a0a}.scroll-down-btn:hover{background:#fff;color:var(--blue);border-color:var(--blue);transform:translateY(2px);box-shadow:0 6px 16px #2f6fe41f}.scroll-down-btn svg{transition:transform .2s ease;color:var(--blue)}.scroll-down-btn:hover svg{transform:translateY(2px)}.home-guide-section{max-width:1240px!important;margin:16px auto 100px!important;padding:56px 32px 0!important;border-top:1.5px solid var(--line);position:relative;opacity:0;transform:translateY(26px);transition:opacity .7s cubic-bezier(.16,1,.3,1),transform .7s cubic-bezier(.16,1,.3,1);will-change:opacity,transform}.home-guide-section.is-visible{opacity:1;transform:translateY(0)}.home-guide-section:before{content:"";position:absolute;top:-2px;left:50%;transform:translate(-50%);width:120px;height:3px;background:var(--blue);border-radius:3px}.home-guide-header{text-align:center;max-width:780px;margin:0 auto 32px}.home-guide-badge{display:inline-flex;align-items:center;gap:8px;padding:6px 16px;border-radius:30px;background:var(--sky-tint);border:1px solid var(--line-strong);color:var(--blue);font-size:.8rem;font-weight:700;letter-spacing:.03em;text-transform:uppercase;margin-bottom:14px}.home-guide-header h2{color:var(--ink);font-weight:700;font-size:clamp(1.8rem,2.6vw,2.25rem);font-family:var(--font-display);letter-spacing:-.025em;line-height:1.3}.home-guide-desc{margin-top:10px;color:var(--slate);font-size:.98rem;line-height:1.65}.home-guide-section .sample-card{max-width:1040px;margin:0 auto 28px;border:1.5px solid var(--line-strong);border-radius:18px;background:var(--paper);padding:16px 24px;display:flex;flex-direction:row;align-items:center;justify-content:space-between;gap:24px;box-shadow:0 4px 18px #0b1f3a0a}.home-guide-section .sample-card-head{display:flex;align-items:center;gap:14px;flex:0 1 auto}.home-guide-section .sample-title-wrap{display:flex;align-items:center;gap:12px}.home-guide-section .sample-controls{display:flex;align-items:center;gap:12px;flex:1 1 540px;max-width:640px}.home-guide-section .guide-tabs-bar{display:flex;align-items:center;border:1px solid var(--navy);border-bottom:none;border-radius:16px 16px 0 0;background:var(--navy);padding:4px 16px 0;margin:0 auto;max-width:1040px;overflow-x:auto;scrollbar-width:none}.home-guide-section .guide-tabs-bar::-webkit-scrollbar{display:none}.home-guide-section .tab-item{position:relative;transition:all .2s ease;cursor:pointer;border:none;background:transparent;padding:12px 18px 14px;color:#ffffffd1;font-weight:600;font-size:.9rem;white-space:nowrap;flex:1;text-align:center}.home-guide-section .tab-item:hover{color:#fff}.home-guide-section .tab-item.active{color:#fff;font-weight:700;background:transparent;box-shadow:none;border:none}.home-guide-section .tab-item.active:after{display:block;position:absolute;right:14px;bottom:0;left:14px;border-radius:3px 3px 0 0;background:#fff;height:3px;content:""}.home-guide-section .guide-card{max-width:1040px;margin:0 auto;border:1.5px solid var(--line-strong);border-top:none;border-radius:0 0 20px 20px;background:var(--paper);padding:40px 44px;box-shadow:0 8px 30px #0b1f3a0a;min-height:480px}@media (max-width: 860px){.home-guide-section{padding:36px 16px 0!important}.home-guide-section .sample-card{flex-direction:column;align-items:stretch;padding:16px;gap:14px}.home-guide-section .sample-controls{flex:none!important;width:100%;max-width:100%;flex-direction:column;align-items:stretch;gap:10px}.home-guide-section .sample-select-wrapper{min-width:0!important;width:100%}.home-guide-section .btn-download-sample{width:100%;justify-content:center;padding:12px 20px}.home-guide-section .guide-card{padding:24px 16px}.home-guide-section .guide-tabs-bar{padding:6px 8px 0;overflow-x:auto;-webkit-overflow-scrolling:touch;scroll-snap-type:x proximity}.home-guide-section .tab-item{flex:0 0 auto;padding:10px 14px 12px;font-size:.85rem;scroll-snap-align:start}}.guide-container{margin:28px auto 56px;padding:0 20px;max-width:980px}.guide-page-header{margin-bottom:22px;text-align:left}.guide-page-header h2{color:var(--navy);font-weight:700;font-size:1.75rem;font-family:var(--font-display);letter-spacing:-.02em}.guide-page-header p{margin-top:5px;color:var(--slate);font-size:.94rem}.guide-tabs-bar{display:flex;align-items:center;border:1px solid var(--navy);border-bottom:none;border-radius:14px 14px 0 0;background:var(--navy);padding:4px 12px 0;overflow-x:auto;scrollbar-width:none}.guide-tabs-bar::-webkit-scrollbar{display:none}.tab-item{position:relative;transition:all .2s ease;cursor:pointer;border:none;background:transparent;padding:11px 16px 13px;color:#ffffffd1;font-weight:600;font-size:.88rem;white-space:nowrap}.tab-item:hover{color:#fff}.tab-item.active{color:#fff;font-weight:700}.tab-item.active:after{position:absolute;right:12px;bottom:0;left:12px;border-radius:3px 3px 0 0;background:#fff;height:3px;content:""}.guide-card{border:1px solid var(--line);border-top:none;border-radius:0 0 16px 16px;background:var(--paper);padding:30px 36px;min-height:480px}.tab-pane{display:none}.tab-pane.active{display:block;animation:fadeIn .25s ease}.guide-section-block{margin-bottom:32px;border-bottom:1px dashed var(--line);padding-bottom:28px}.guide-section-block:last-child{margin-bottom:0;border-bottom:none;padding-bottom:0}.guide-heading{display:flex;align-items:center;gap:12px;margin-bottom:14px}.guide-badge{display:flex;flex-shrink:0;justify-content:center;align-items:center;border-radius:50%;background:var(--blue);width:30px;height:30px;color:#fff;font-weight:700;font-size:.92rem;font-family:var(--font-display)}.guide-title{margin:0;color:var(--navy);font-weight:700;font-size:1.2rem;font-family:var(--font-display);letter-spacing:-.01em}.guide-desc{margin-bottom:14px;color:#1e293b;font-size:.96rem;line-height:1.7}.guide-desc strong{color:var(--navy);font-weight:700}.syntax-box{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin:12px 0 16px;padding:12px 16px;background:#fff;border:1px solid var(--line-strong);border-radius:8px;font-size:.92rem;line-height:1.5}.syntax-box-label{font-size:.8rem;font-weight:700;color:var(--slate);text-transform:uppercase;letter-spacing:.04em;margin-right:4px}.syntax-chip{display:inline-flex;align-items:center;padding:4px 10px;background:var(--sky);border:1px solid var(--line);border-radius:6px;color:var(--navy);font-weight:700;font-size:.88rem;white-space:nowrap}.syntax-chip.primary{background:var(--sky);border-color:var(--line);color:var(--navy)}.syntax-plus{color:var(--slate-dim);font-weight:700;font-size:.92rem}.kbd-key{display:inline-block;padding:2px 7px;font-size:.84em;font-family:inherit;font-weight:700;color:var(--navy);background:#fff;border:1px solid var(--line-strong);border-radius:5px;box-shadow:0 1px #00000014}.err-tag{display:inline-block;padding:2px 7px;border-radius:4px;background:#fee2e2;color:#991b1b;font-weight:700;font-family:Consolas,Monaco,monospace;font-size:.88em;border:1px solid #fecaca}.ok-tag{display:inline-block;padding:2px 7px;border-radius:4px;background:#ecfdf5;color:#065f46;font-weight:700;font-family:Consolas,Monaco,monospace;font-size:.88em;border:1px solid #a7f3d0}.trouble-box{margin:10px 0 4px;background:var(--sky);border:1px solid var(--line);border-radius:10px;padding:14px 18px}.trouble-grid{display:flex;flex-direction:column;gap:8px;margin:0}.trouble-item{display:flex;gap:10px;align-items:baseline;font-size:.94rem;line-height:1.6;color:#1e293b}.trouble-label{font-weight:700;color:var(--navy);min-width:85px;flex-shrink:0}.example-box{margin:14px 0;border:1px solid var(--line);border-left:3.5px solid var(--blue);border-radius:10px;background:var(--sky);padding:14px 18px}.example-box-title{display:flex;align-items:center;gap:6px;margin-bottom:10px;color:var(--blue);font-weight:700;font-size:.92rem}.example-list{margin:0;padding:0;list-style:none}.example-list li{position:relative;padding-left:18px;color:#1e293b;font-size:.92rem;line-height:1.75}.example-list li:before{position:absolute;left:4px;content:"•";color:var(--slate-dim);font-weight:700}.guide-note-box{margin:14px 0 0;border:1px solid var(--line);border-radius:8px;background:var(--sky);padding:12px 16px;color:#1e293b;font-size:.9rem;line-height:1.65}.guide-note-box strong{color:var(--navy)}code{border-radius:4px;background:var(--sky-tint);padding:2px 5px;color:var(--navy);font-weight:700;font-size:.86em;font-family:Consolas,Monaco,monospace}.tag-table-wrap{margin:12px 0;border:1px solid var(--line);border-radius:8px;overflow-x:auto}.tag-table{border-collapse:collapse;width:100%;font-size:.86rem}.tag-table th{border-bottom:1px solid var(--line);background:var(--sky-tint);padding:10px 14px;color:var(--navy);font-weight:700;text-align:left}.tag-table td{border-bottom:1px solid var(--line);padding:9px 14px;color:var(--ink-soft)}.tag-table tr:last-child td{border-bottom:none}.page-header{margin-bottom:24px}.page-header-title{color:var(--navy);font-size:clamp(1.45rem,5vw,2.1rem);font-weight:700;font-family:var(--font-display);line-height:1.25;letter-spacing:-.02em}.page-header-sub{margin-top:8px;color:var(--slate);font-size:clamp(.9rem,2.6vw,1.02rem);line-height:1.55}.compose-sample-card{margin-top:28px}.compose-container{margin:0 auto;padding:40px 32px 72px;max-width:860px}.compose-steps{display:flex;flex-direction:column;gap:12px;margin-top:32px}.compose-step{display:flex;align-items:flex-start;gap:18px;background:var(--paper);border:1.5px solid var(--line);border-radius:var(--radius-md);padding:20px 24px;transition:border-color .2s ease,box-shadow .2s ease}.compose-step:hover{border-color:var(--line-strong);box-shadow:0 4px 14px #0b1f3a0a}.cstep-num{display:flex;align-items:center;justify-content:center;min-width:36px;height:36px;border-radius:50%;background:var(--sky-tint);border:1px solid var(--line);color:var(--navy);font-weight:700;font-size:.95rem;font-family:var(--font-display);flex-shrink:0;transition:background .2s ease,border-color .2s ease,color .2s ease}.compose-step:hover .cstep-num{background:var(--blue-soft);border-color:#c7dcfa;color:var(--blue)}.cstep-body{flex:1}.cstep-title{font-weight:700;font-size:.98rem;color:var(--ink);font-family:var(--font-display);margin-bottom:4px}.cstep-desc{font-size:.9rem;color:var(--slate);line-height:1.6}.cstep-desc code{background:var(--sky);border:1px solid var(--line);border-radius:4px;padding:1px 6px;font-size:.85rem;color:var(--navy);font-family:monospace}.compose-guide-cta{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-top:28px;background:var(--paper);border:1.5px solid var(--line);border-radius:var(--radius-lg);padding:22px 28px;flex-wrap:wrap;box-shadow:0 2px 8px #0b1f3a08}.cta-left{display:flex;align-items:center;gap:16px;flex:1;min-width:260px}.cta-badge-icon{display:flex;align-items:center;justify-content:center;width:44px;height:44px;border-radius:12px;background:var(--sky-tint);border:1px solid var(--line);color:var(--navy);flex-shrink:0}.cta-text{flex:1}.cta-title{font-weight:700;font-size:1.05rem;color:var(--ink);font-family:var(--font-display);margin-bottom:3px}.cta-sub{font-size:.88rem;color:var(--slate);line-height:1.55}.features-container{margin:0 auto;padding:56px 32px 72px;max-width:1200px}.features-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;margin-top:36px}.feature-card{display:flex;flex-direction:column;gap:16px;border:1px solid var(--line);border-radius:var(--radius-lg);background:var(--paper);padding:32px}.fc-icon{display:flex;justify-content:center;align-items:center;width:52px;height:52px;font-size:2rem;border-radius:14px;background:var(--sky);flex-shrink:0}.fc-title{color:var(--ink);font-weight:700;font-size:1.1rem;font-family:var(--font-display)}.fc-desc{color:var(--slate);font-size:.92rem;line-height:1.65}.toast{position:fixed;right:24px;bottom:24px;transform:translateY(100px);opacity:0;z-index:999;transition:transform .25s cubic-bezier(.175,.885,.32,1.275),opacity .25s;border:1px solid var(--slate);border-radius:12px;background:var(--ink);padding:14px 20px;color:#fff;font-weight:500;font-size:.92rem}.toast.show{transform:translateY(0);opacity:1}@media (max-width: 990px){.hero{grid-template-columns:1fr;gap:40px;padding-top:36px;min-height:auto}.hero-art{order:-1;margin:0 auto;max-width:360px}.features-grid{grid-template-columns:1fr}}@media (max-width: 860px){.topbar{padding:12px 18px;padding-top:max(12px,env(safe-area-inset-top,12px));padding-left:max(16px,env(safe-area-inset-left,16px));padding-right:max(16px,env(safe-area-inset-right,16px))}.mobile-menu{display:block}.topnav-links{display:none;position:absolute;top:calc(100% + 2px);right:16px;left:16px;flex-direction:column;border:1.5px solid var(--line);border-radius:16px;background:#fff;padding:10px;box-shadow:0 12px 36px #0b1f3a29;z-index:200}.topnav-links.open{display:flex}.topnav-links a{text-align:center;padding:11px 16px;font-size:.95rem;font-weight:600}.compose-container,.guide-container,.features-container{padding:24px 16px 80px}.compose-sample-card{margin-top:18px!important}.sample-card{padding:16px 14px;gap:12px}.sample-card-head{flex-direction:column;align-items:flex-start;gap:8px}.sample-controls{flex-direction:column;align-items:stretch;gap:10px;width:100%}.sample-select-wrapper{min-width:0!important;width:100%}.btn-download-sample{width:100%;justify-content:center;padding:12px 20px}.compose-steps{margin-top:20px;gap:10px}.compose-step{padding:14px;gap:12px}.cstep-num{min-width:32px;height:32px;font-size:.88rem}.compose-guide-cta{margin-top:20px;padding:18px 16px;flex-direction:column;align-items:stretch;gap:14px}.cta-left{min-width:0;width:100%}.features-grid{grid-template-columns:1fr;gap:14px;margin-top:20px}.feature-card{padding:20px 16px}.dropzone{flex-direction:column;text-align:center;padding:28px 18px}.btn-primary{width:100%;justify-content:center}}.mixer{display:grid;grid-template-columns:490px 1fr;height:100vh;background:var(--sky)}.mx-left{background:var(--sky);border-right:1px solid var(--line);height:100vh;overflow-y:auto;padding:0 0 32px}.mx-left-sticky{position:sticky;top:0;z-index:10;background:var(--paper);padding:14px 20px 12px;border-bottom:1px solid var(--line)}.mx-nav-row{display:grid;grid-template-columns:1fr 1fr;gap:8px}.btn-nav{height:42px;border-radius:21px;border:none;font-size:.86rem;font-weight:800;letter-spacing:.01em;display:flex;align-items:center;justify-content:center;gap:6px;transition:background .15s}.btn-nav.home{background:var(--sky-tint);color:var(--navy)}.btn-nav.home:hover{background:var(--sky-tint-2)}.btn-nav.file{background:var(--blue);color:#fff}.btn-nav.file:hover{background:var(--blue-hover)}.mx-body{padding:18px 20px 0;display:flex;flex-direction:column;gap:16px}.section-card{background:var(--paper);border:1px solid var(--line-strong);border-radius:14px;padding:16px 18px 18px;transition:border-color .15s}.section-card:hover{border-color:#b4cbe9}.section-head{display:flex;align-items:center;gap:10px;margin-bottom:14px;padding-bottom:10px;border-bottom:1px dashed var(--line)}.section-icon{flex:none;width:32px;height:32px;border-radius:8px;background:var(--sky-tint);color:var(--blue);display:flex;align-items:center;justify-content:center}.section-titles{flex:1;min-width:0}.section-title{font-family:var(--font-ui);font-size:.9rem;font-weight:800;color:var(--navy);text-transform:uppercase;letter-spacing:.03em}.toggle-switch{position:relative;display:inline-block;width:42px;height:24px;flex:none}.toggle-switch input{opacity:0;width:0;height:0}.toggle-slider{position:absolute;cursor:pointer;inset:0;background-color:#d0d8e6;border-radius:24px;transition:background-color .2s}.toggle-slider:before{position:absolute;content:"";height:18px;width:18px;left:3px;bottom:3px;background-color:#fff;border-radius:50%;transition:transform .2s}.toggle-switch input:checked+.toggle-slider{background-color:var(--blue)}.toggle-switch input:checked+.toggle-slider:before{transform:translate(18px)}.conditional-block{transition:opacity .2s}.conditional-block.is-hidden{display:none}.doc-file-row{display:flex;align-items:center;gap:10px;padding:12px 14px;background:var(--sky-tint);border:1px solid var(--line-strong);border-radius:10px;margin-bottom:10px}.doc-file-row svg{color:var(--blue);flex:none}.doc-file-name{font-weight:800;font-size:.92rem;color:var(--navy);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.doc-stats{display:flex;gap:8px;flex-wrap:wrap}.doc-stat{background:var(--paper);border:1px solid var(--line);color:var(--ink-soft);font-size:.78rem;font-weight:700;padding:5px 11px;border-radius:6px}.doc-stat.total{background:var(--navy);border-color:var(--navy);color:#fff}.field-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px 12px}.field-float{display:flex;flex-direction:column;gap:5px}.field-float.span-2{grid-column:1 / -1}.field-float label{font-size:.76rem;font-weight:700;color:var(--slate)}.select-block{width:100%;height:40px;border:1px solid var(--line-strong);border-radius:8px;padding:0 12px;font-size:.88rem;font-weight:500;color:var(--ink);background:#fafcff;appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%2352657F' stroke-width='2.4'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 12px center;transition:border-color .15s}.select-block:focus{background:#fff;border-color:var(--blue);outline:none}.input-block{width:100%;height:40px;border:1px solid var(--line-strong);border-radius:8px;padding:0 12px;font-size:.88rem;font-weight:500;color:var(--ink);background:#fafcff;transition:border-color .15s,background .15s}.input-block:focus{background:#fff;border-color:var(--blue);outline:none}.input-block::placeholder,.select-block::placeholder,.code-input::placeholder{color:var(--slate-dim);opacity:.85;font-weight:400;font-style:normal}.brush-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px}.brush-card{display:flex;align-items:center;gap:10px;padding:10px 12px;border:1.5px solid var(--line);border-radius:10px;background:#fafcff;cursor:pointer;transition:border-color .15s,background .15s}.brush-card:hover{border-color:var(--line-strong);background:var(--sky-tint)}.brush-card.selected{border-color:var(--blue);background:var(--paper)}.brush-swatch{position:relative;flex:none;width:30px;height:30px;border-radius:8px;display:flex;align-items:center;justify-content:center}.brush-swatch svg{width:15px;height:15px;color:#fff;opacity:0;transform:scale(.5);transition:opacity .15s,transform .15s}.brush-card.selected .brush-swatch svg{opacity:1;transform:scale(1)}.brush-card .option-label{font-size:.86rem;font-weight:700;color:var(--ink)}.part-card{border:1px solid var(--line-strong);border-radius:10px;overflow:hidden;background:var(--paper)}.part-card+.part-card{margin-top:12px}.part-card-head{background:#edf4fd;color:var(--navy);font-size:.8rem;font-weight:800;padding:9px 12px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;text-transform:uppercase;letter-spacing:.02em}.part-card-head .count{color:var(--slate);font-weight:700;text-transform:none;font-size:.76rem}.part-card-body{padding:12px 10px;display:flex;flex-wrap:wrap;gap:8px;align-items:center;background:#fff}.q-bubble{width:32px;height:32px;border-radius:50%;border:none;color:#fff;font-size:.8rem;font-weight:800;display:flex;align-items:center;justify-content:center;cursor:pointer}.q-bubble.ring{outline:2px solid var(--paper);box-shadow:0 0 0 4px var(--ink)}.cluster{position:relative;display:inline-flex;align-items:center;gap:5px;padding:6px 8px 6px 10px;border-radius:8px;border:1.5px solid;margin-top:6px}.g-chip{display:inline-flex;align-items:center;gap:5px;font-family:var(--font-ui);font-weight:700;letter-spacing:.01em;border-radius:20px;border:1px solid;white-space:nowrap}.g-chip .dot{width:6px;height:6px;border-radius:50%;flex:none}.g-chip.g0{background:var(--g0-bg);color:var(--g0-ink);border-color:var(--g0-border)}.g-chip.g0 .dot{background:var(--g0-dot)}.g-chip.g1{background:var(--g1-bg);color:var(--g1-ink);border-color:var(--g1-border)}.g-chip.g1 .dot{background:var(--g1-dot)}.g-chip.g2{background:var(--g2-bg);color:var(--g2-ink);border-color:var(--g2-border)}.g-chip.g2 .dot{background:var(--g2-dot)}.g-chip.g3{background:var(--g3-bg);color:var(--g3-ink);border-color:var(--g3-border)}.g-chip.g3 .dot{background:var(--g3-dot)}.cluster-tag.g-chip{position:absolute;top:-9px;left:6px;font-size:.58rem;padding:2px 7px}.cluster-lock{position:absolute;top:-9px;right:6px;z-index:1;width:20px;height:20px;border-radius:50%;background:var(--paper);border:1.5px solid var(--line-strong);color:var(--slate);display:flex;align-items:center;justify-content:center;transition:background .15s,border-color .15s}.cluster-lock svg{width:11px;height:11px}.cluster-lock.locked{background:#f59e0b;border-color:#d97706;color:#fff}.accordion-head{width:100%;background:transparent;border:none;padding:0;display:flex;align-items:center;justify-content:space-between;cursor:pointer}.accordion-caret{color:var(--slate);transition:transform .15s;flex:none}.accordion-body{display:flex;flex-direction:column;gap:8px;margin-top:14px}.accordion-body.is-collapsed{display:none}.code-field{display:flex;align-items:center;gap:10px}.code-field .n{font-size:.8rem;color:var(--navy);font-weight:800;flex:none;width:18px;text-align:center}.code-input{flex:1;height:38px;border:1px solid var(--line-strong);border-radius:8px;padding:0 12px;font-size:.9rem;font-weight:500;color:var(--ink-soft);min-width:0;background:#fafcff;transition:border-color .15s,background .15s}.code-input:focus{background:#fff;border-color:var(--blue);outline:none}.tpl-options-container{display:flex;flex-direction:column;gap:8px;transition:opacity .2s}.tpl-options-container.is-disabled{opacity:.4;pointer-events:none}.option-card{display:flex;align-items:center;gap:12px;padding:11px 12px;border:1.5px solid var(--line);border-radius:10px;background:#fafcff;cursor:pointer;transition:border-color .15s,background .15s}.option-card:hover{border-color:var(--line-strong);background:var(--sky)}.option-card.selected{border-color:var(--blue);background:var(--paper)}.option-radio{flex:none;width:16px;height:16px;border-radius:50%;border:2px solid var(--line-strong);position:relative}.option-card.selected .option-radio{border-color:var(--blue)}.option-card.selected .option-radio:after{content:"";position:absolute;inset:2.5px;border-radius:50%;background:var(--blue)}.tpl-preview{flex:1;font-family:var(--font-paper);font-size:.74rem;line-height:1.4;color:#1a1a1a;text-align:center;min-width:0;padding:8px 6px;background:var(--sky);border-radius:6px}.tpl-preview .l1{display:block;font-weight:800;color:var(--navy);font-size:.76rem;margin-bottom:1px;text-transform:uppercase}.mx-cta-wrap{padding:20px 20px 10px}.btn-cta{width:100%;height:48px;border:none;border-radius:24px;background:linear-gradient(135deg,var(--blue) 0%,var(--navy) 100%);color:#fff;font-size:.98rem;font-weight:800;letter-spacing:.02em;transition:background .15s}.btn-cta:hover{opacity:.95}.mx-right{height:100vh;overflow-y:auto;padding:32px 40px 80px}.preview-sheet{max-width:820px;margin:0 auto;background:var(--paper);border:1px solid var(--line);border-radius:var(--radius-md);padding:44px 50px;font-family:var(--font-paper);color:#111}#exam-header-wrapper{transition:opacity .2s}#exam-header-wrapper.is-hidden,.tpl-sheet-view{display:none}.tpl-sheet-view.is-active{display:block}.sheet-masthead{display:grid;grid-template-columns:1fr 1.18fr;gap:16px;font-size:.84rem;text-align:center;align-items:start;font-family:var(--font-paper);margin-bottom:12px}.masthead-left,.masthead-right{display:flex;flex-direction:column;align-items:center}.masthead-dept{font-weight:700;font-size:.92rem;line-height:1.3;text-transform:uppercase;letter-spacing:.01em}.masthead-school{font-weight:700;font-size:.92rem;line-height:1.3;text-transform:uppercase;letter-spacing:.01em;margin-top:2px}.school-name-underline{display:inline-block;border-bottom:1.5px solid #111;padding-bottom:1px}.masthead-divider{display:none}.masthead-pages{font-size:.8rem;font-style:italic;line-height:1.3;color:#333;margin-top:3px}.masthead-exam{font-weight:700;font-size:.96rem;line-height:1.3;text-transform:uppercase;letter-spacing:.01em}.masthead-year{font-weight:700;font-size:.88rem;line-height:1.35;margin-top:2px}.masthead-subject{font-size:.88rem;line-height:1.35;margin-top:2px}.masthead-duration{font-size:.82rem;line-height:1.35;margin-top:2px}.sheet-student-top{display:flex;justify-content:space-between;align-items:baseline;font-size:.88rem;font-family:var(--font-paper);font-style:italic;margin-top:18px;padding-bottom:3px;border-bottom:1.5px solid #111;margin-bottom:8px}.sheet-code-row{display:flex;justify-content:flex-end;margin-top:6px;margin-bottom:14px;font-family:var(--font-paper)}.exam-code-box{display:inline-block;border:1.5px solid #111;padding:2px 10px;font-size:.88rem;font-weight:700;background:#fff}.moet-masthead{position:relative;display:grid;grid-template-columns:1.05fr 1.25fr;gap:16px;font-size:.84rem;text-align:center;align-items:start;margin-bottom:14px;font-family:var(--font-paper)}.moet-left{position:relative}.moet-org{font-weight:700;font-size:.92rem;text-transform:uppercase;letter-spacing:.01em}.moet-badge{display:inline-block;font-weight:700;font-size:.84rem;margin-top:2px;border-bottom:1.2px solid #111;padding-bottom:1px}.moet-pages{font-size:.78rem;font-style:italic;margin-top:4px}.moet-right .moet-exam-name{font-weight:700;font-size:.96rem;text-transform:uppercase;line-height:1.3}.moet-right .moet-sub{margin-top:3px;font-size:.84rem;line-height:1.4}.official-seal{position:absolute;top:-10px;left:15px;width:105px;height:105px;pointer-events:none;transform:rotate(-7deg);opacity:.86;mix-blend-mode:multiply;z-index:2;filter:contrast(1.08)}.moet-code-box{border:1.4px solid #111;display:inline-block;padding:2px 10px;font-weight:700;font-size:.88rem;margin-top:4px}.part-banner{background:var(--sky);color:var(--ink);font-weight:700;font-size:.92rem;padding:8px 14px;border-radius:6px;margin:22px 0 14px;font-family:var(--font-ui)}.q-item{margin-bottom:16px;font-size:.94rem;line-height:1.65}.q-item .qnum{font-weight:700}.q-options{display:grid;align-items:baseline;gap:4px 18px;margin-top:4px;padding-left:18px}.q-options.cols-4{grid-template-columns:repeat(4,1fr)}.q-options.cols-2{grid-template-columns:repeat(2,1fr)}.q-options .opt b{color:var(--sig-options);font-style:italic}.q-options .opt.correct b{color:var(--sig-correct);font-weight:700}.preview-g-chip{font-size:.68rem;padding:4px 12px 4px 10px;margin-bottom:10px}.preview-g-chip .dot{width:7px;height:7px}.passage{background:var(--sky);border-left:3px solid var(--blue);padding:10px 14px;border-radius:0 8px 8px 0;margin:0 0 14px;font-size:.9rem;font-style:italic;color:#222;font-family:var(--font-ui)}.preview-img{display:block;max-width:min(100%,560px);max-height:360px;width:auto;height:auto;object-fit:contain;margin:10px auto;border-radius:4px}.exam-table-wrapper{width:100%;max-width:100%;overflow-x:auto;margin:12px 0;box-sizing:border-box;-webkit-overflow-scrolling:touch}.exam-table{width:100%;max-width:100%;margin:0 auto;border-collapse:collapse;font-size:.85rem;font-family:var(--font-paper);box-sizing:border-box;table-layout:auto}.exam-table td,.exam-table th{border:1px solid #333;padding:4px 6px;text-align:center;vertical-align:middle;box-sizing:border-box;line-height:1.3}.exam-table tr:first-child td,.exam-table tr:first-child th{font-weight:600}.exam-table td:first-child{text-align:left;white-space:nowrap;padding-left:8px;padding-right:8px}.exam-table tr:first-child td:first-child{text-align:center}.modal-overlay{position:fixed;inset:0;background:#0b1f3a73;display:none;align-items:center;justify-content:center;z-index:50;backdrop-filter:blur(2px)}.modal-overlay.is-open{display:flex}.modal-card{background:var(--paper);border-radius:var(--radius-lg);padding:32px 36px;width:min(90vw,380px);text-align:center}.modal-card h3{font-family:var(--font-display);font-size:1.05rem;color:var(--ink);margin-bottom:18px}.progress-track{height:8px;border-radius:5px;background:var(--sky-tint-2);overflow:hidden}.progress-fill{height:100%;background:var(--blue);width:0%;transition:width .25s linear}.modal-card p{margin-top:12px;font-size:.83rem;color:var(--slate-dim)}@media (max-width:1024px){.mixer{grid-template-columns:440px 1fr}.mx-right{padding:28px 20px 60px}.preview-sheet{padding:34px 28px}}@media (max-width:860px){.hero{grid-template-columns:1fr;padding-top:40px;gap:36px}.hero-art{order:-1;max-width:280px;margin:0 auto}.hero-text h1{max-width:none}.topnav-links{display:none}}@media (max-width:760px){.mixer{grid-template-columns:1fr;height:auto}.mx-left{height:auto;border-right:none;border-bottom:1px solid var(--line)}.mx-left-sticky{position:static}.mx-right{height:auto;padding:24px 16px 60px}.preview-sheet{padding:26px 18px}.sheet-masthead{font-size:.74rem}.moet-masthead{grid-template-columns:1fr;gap:10px}.q-options,.brush-grid{grid-template-columns:1fr}}@media (max-width:520px){.topbar{padding:14px 18px}.hero{padding:32px 18px 24px}.dropzone{flex-direction:column;text-align:center}.btn-primary{width:100%}.field-grid{grid-template-columns:1fr}.sheet-student-top{flex-direction:column;gap:4px}}.g-tag-label{font-size:16px;font-weight:800;letter-spacing:.02em;font-style:italic;color:#c026d3;margin:14px 0 4px;font-family:JetBrains Mono,Fira Code,Cascadia Code,monospace}.g-tag-label .g-bracket{font-size:1.3em;font-weight:900;font-style:normal;letter-spacing:0;vertical-align:middle;line-height:1}.guide-figure{margin:16px 0 20px;background:var(--sky);border:none;border-radius:10px;padding:14px 16px;display:flex;justify-content:center;align-items:center}.guide-figure:hover{border-color:transparent}.guide-image{display:block;max-width:100%;height:auto;border-radius:6px;margin:0 auto;border:none;background:transparent;cursor:zoom-in;transition:opacity .15s ease}.guide-image:hover{opacity:.94}.guide-caption{margin-top:9px;font-size:.84rem;color:var(--slate);font-weight:500;padding:0 4px;line-height:1.5}.guide-image-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:12px;margin:14px 0}.ans-example-rows{display:flex;flex-direction:column;gap:10px;margin-top:6px;font-family:var(--font-paper),"Times New Roman",serif,sans-serif}.ans-row{display:flex;align-items:center;gap:22px;font-size:1.05rem;font-weight:700;color:#1e293b;line-height:1.4}.ans-row span,.ans-row b{display:inline-block}.ans-row .u-ans{display:inline-block;text-decoration:underline;text-decoration-skip-ink:none;text-underline-offset:4px;text-decoration-thickness:2px;border-bottom:2px solid currentColor;text-decoration:none;padding-bottom:2px;line-height:1.15}.ans-row .red-ans{color:#dc2626}.ans-row .blue-ans{color:#2563eb}.image-modal-overlay{position:fixed;inset:0;background:#0b1f3ac7;backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;z-index:9999;opacity:0;visibility:hidden;transition:opacity .22s ease,visibility .22s ease;padding:24px;cursor:zoom-out}.image-modal-overlay.is-open{opacity:1;visibility:visible}.image-modal-container{position:relative;max-width:94vw;max-height:92vh;display:flex;flex-direction:column;align-items:center;justify-content:center;cursor:default}.image-modal-content{position:relative;display:flex;justify-content:center;align-items:center;max-width:100%;max-height:86vh}.image-modal-img{max-width:92vw;max-height:84vh;width:auto;height:auto;object-fit:contain;border-radius:8px;box-shadow:0 20px 48px #00000061;background:#fff;transform:scale(.94);transition:transform .22s cubic-bezier(.16,1,.3,1);user-select:none}.image-modal-overlay.is-open .image-modal-img{transform:scale(1)}.image-modal-close{position:absolute;top:-16px;right:-16px;width:38px;height:38px;border-radius:50%;background:#fff;border:1px solid var(--line);color:var(--navy);display:flex;align-items:center;justify-content:center;cursor:pointer;box-shadow:0 4px 14px #0003;transition:background .15s ease,transform .15s ease;z-index:10}.image-modal-close:hover{background:#f1f5f9;transform:scale(1.08)}.image-modal-close:active{transform:scale(.95)}.image-modal-caption{margin-top:12px;color:#fff;font-size:.92rem;font-weight:500;text-shadow:0 1px 3px rgba(0,0,0,.6);text-align:center;max-width:80vw}.floating-contact-bar{position:fixed;bottom:28px;right:28px;z-index:9999;display:flex;flex-direction:column;gap:14px;align-items:center}.floating-btn{width:52px;height:52px;border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;text-decoration:none;position:relative;transition:transform .25s ease;box-shadow:0 4px 14px #00000029}.floating-btn:hover{transform:scale(1.15);animation-play-state:paused}.floating-btn-messenger{background:linear-gradient(135deg,#0084ff,#00c6ff);animation:fab-shake 4s infinite ease-in-out,fab-glow-messenger 2.2s infinite ease-out}.floating-btn-zalo{background:#0068ff;font-weight:800;font-size:14px;font-family:Arial,sans-serif;letter-spacing:-.5px;animation:fab-shake 4s infinite ease-in-out .7s,fab-glow-zalo 2.2s infinite ease-out .7s}.floating-btn-phone{background:#10b981;color:#fff;box-shadow:0 4px 14px #00000029;animation:fab-shake 4s infinite ease-in-out 1.4s,fab-glow-phone 2.2s infinite ease-out 1.4s}.floating-btn-phone:hover{transform:scale(1.15);animation-play-state:paused;background:#059669}.floating-btn-disabled{opacity:.55;filter:grayscale(40%);animation:none!important;cursor:not-allowed!important;box-shadow:none!important}.floating-btn-disabled:hover{transform:none!important;box-shadow:none!important}@media (max-width: 768px){.floating-contact-bar{right:12px;bottom:max(16px,env(safe-area-inset-bottom,16px));gap:8px;z-index:99}.floating-btn{width:44px;height:44px;box-shadow:0 3px 10px #0000002e}.floating-btn svg{width:22px;height:22px}.floating-btn-zalo span:first-child{font-size:12px}.floating-tooltip{display:none!important}}.fcb-modal-overlay{position:fixed;inset:0;background:#0f172a59;backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px);z-index:99999;display:flex;align-items:center;justify-content:center;opacity:0;pointer-events:none;transition:opacity .2s ease}.fcb-modal-overlay.active{opacity:1;pointer-events:all}.fcb-modal-card{position:relative;background:#fff;border:1.5px solid #e2e8f0;border-radius:20px;padding:32px 28px 24px;width:350px;max-width:90vw;box-shadow:none!important;text-align:center;animation:none!important}.fcb-modal-overlay.active .fcb-modal-card{transform:none}.fcb-modal-close{position:absolute;top:14px;right:16px;background:#f1f5f9;border:none;color:#64748b;width:30px;height:30px;border-radius:50%;cursor:pointer;font-size:13px;display:flex;align-items:center;justify-content:center;transition:background .15s,color .15s;line-height:1;box-shadow:none!important}.fcb-modal-close:hover{background:#e2e8f0;color:#0f172a}.fcb-modal-icon{width:58px;height:58px;background:#10b981;border-radius:50%;display:flex;align-items:center;justify-content:center;margin:0 auto 16px;color:#fff;box-shadow:none!important;animation:none!important}.fcb-modal-title{font-size:18px;font-weight:700;color:#0f172a;margin:0 0 8px;letter-spacing:-.3px}.fcb-modal-desc{font-size:13.5px;color:#64748b;margin:0 0 20px;line-height:1.55}.fcb-modal-links{display:flex;flex-direction:column;gap:10px}.fcb-modal-link{display:flex;align-items:center;gap:12px;padding:12px 16px;border-radius:12px;text-decoration:none;transition:background .15s,border-color .15s;cursor:pointer;box-shadow:none!important}.fcb-modal-link:hover{transform:none!important}.fcb-link-zalo{background:#f0f7ff;border:1px solid #bae6fd}.fcb-link-zalo:hover{background:#e0f2fe;border-color:#7dd3fc}.fcb-link-messenger{background:#f5f3ff;border:1px solid #ddd6fe}.fcb-link-messenger:hover{background:#ede9fe;border-color:#c4b5fd}.fcb-link-icon{width:38px;height:38px;border-radius:50%;display:flex;align-items:center;justify-content:center;flex-shrink:0;overflow:hidden;box-shadow:none!important}.fcb-icon-zalo{background:#0068ff;font-weight:800;font-size:11px;font-family:Arial,sans-serif;color:#fff;letter-spacing:-.5px}.fcb-icon-messenger{background:linear-gradient(135deg,#0084ff,#00c6ff)}.fcb-link-info{flex:1;text-align:left;display:flex;flex-direction:column;gap:1px}.fcb-link-label{font-size:13px;font-weight:700;color:#0f172a}.fcb-link-value{font-size:12px;color:#64748b}.fcb-link-arrow{color:#94a3b8;flex-shrink:0;transition:color .15s}.fcb-modal-link:hover .fcb-link-arrow{color:#475569}.floating-tooltip{position:absolute;right:64px;background:#0f172ae6;color:#fff;padding:5px 12px;border-radius:6px;font-size:12px;font-weight:600;white-space:nowrap;pointer-events:none;opacity:0;transition:opacity .2s ease;box-shadow:0 4px 12px #0003}.floating-btn:hover .floating-tooltip{opacity:1}@keyframes fab-shake{0%,80%,to{transform:rotate(0) scale(1)}85%{transform:rotate(-7deg) scale(1.05)}90%{transform:rotate(7deg) scale(1.05)}95%{transform:rotate(-4deg) scale(1.03)}}@keyframes fab-glow-messenger{0%{box-shadow:0 0 #0084ff99,0 4px 12px #00000026}70%{box-shadow:0 0 0 14px #0084ff00,0 4px 12px #00000026}to{box-shadow:0 0 #0084ff00,0 4px 12px #00000026}}@keyframes fab-glow-zalo{0%{box-shadow:0 0 #0068ff99,0 4px 12px #00000026}70%{box-shadow:0 0 0 14px #0068ff00,0 4px 12px #00000026}to{box-shadow:0 0 #0068ff00,0 4px 12px #00000026}}@keyframes fab-glow-phone{0%{box-shadow:0 0 #10b98199,0 4px 12px #00000026}70%{box-shadow:0 0 0 14px #10b98100,0 4px 12px #00000026}to{box-shadow:0 0 #10b98100,0 4px 12px #00000026}}@media (max-width: 640px){.floating-contact-bar{bottom:20px;right:18px;gap:10px}.floating-btn{width:46px;height:46px}}.math-omml{font-family:"Cambria Math",Times New Roman,serif;display:inline;vertical-align:baseline;line-height:inherit}.math-vec{position:relative;display:inline-block;vertical-align:baseline;line-height:inherit;margin:0 1px}.math-vec-base{display:inline;font-style:italic;font-family:"Cambria Math",Times New Roman,serif;line-height:inherit}.math-vec-arrow{position:absolute;top:-.04em;left:0;width:100%;min-width:7px;height:.26em;pointer-events:none;overflow:visible;color:currentColor;display:block}.math-hat{position:relative;display:inline-flex;flex-direction:column;align-items:center;vertical-align:baseline;line-height:inherit;margin:0 1px}.math-hat-base{display:inline;font-style:italic}.math-hat-symbol{position:absolute;top:-.22em;left:0;width:100%;height:.26em;pointer-events:none;overflow:visible;color:currentColor;display:block}.math-bar{text-decoration:overline;display:inline}