/* ═══════════════════════════════════════════
   DBY SCAN — High-Tech Dark Landing Page
   ═══════════════════════════════════════════ */
@font-face {
    font-family: 'DTPhudu';
    src: url('../fonts/DTPhudu-Black.otf') format('opentype');
    font-weight: 900;
    font-style: normal;
    font-display: swap;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
    --bg-deep:#020617;
    --bg-card:rgba(255,255,255,0.03);
    --bg-card-hover:rgba(255,255,255,0.06);
    --border:rgba(255,255,255,0.08);
    --border-hover:rgba(168,85,247,0.3);
    --purple:#a855f7;--purple-dark:#9333ea;--purple-glow:rgba(168,85,247,0.4);
    --blue:#3b82f6;--cyan:#06b6d4;
    --red:#ef4444;--red-bg:rgba(239,68,68,0.1);--red-border:rgba(239,68,68,0.2);
    --green:#22c55e;--green-bg:rgba(34,197,94,0.1);--green-border:rgba(34,197,94,0.2);
    --orange:#f59e0b;--orange-bg:rgba(245,158,11,0.1);--orange-border:rgba(245,158,11,0.2);
    --text-primary:#ffffff;--text-secondary:rgba(255,255,255,0.85);--text-muted:rgba(255,255,255,0.55);
    --gradient-purple:linear-gradient(135deg,#a855f7,#6366f1);
    --gradient-blue:linear-gradient(135deg,#3b82f6,#06b6d4);
    --shadow-sm:0 1px 3px rgba(0,0,0,0.3);--shadow-md:0 4px 14px rgba(0,0,0,0.4);
    --shadow-lg:0 10px 40px rgba(0,0,0,0.5);--shadow-xl:0 20px 60px rgba(0,0,0,0.6);
    --shadow-glow:0 0 30px var(--purple-glow);
    --font:'Be Vietnam Pro','Inter',-apple-system,sans-serif;
    --mono:'JetBrains Mono',monospace;
    --radius:12px;--radius-lg:16px;--radius-xl:24px;
}
html{scroll-behavior:smooth;scroll-padding-top:80px}
body{font-family:var(--font);font-size:18px;line-height:1.75;color:var(--text-primary);background:var(--bg-deep);overflow-x:hidden;-webkit-font-smoothing:antialiased}
a{text-decoration:none;color:inherit}
.container{max-width:1100px;margin:0 auto;padding:0 24px}

/* Utils */
.text-red{color:var(--red)}
.text-grad{background:var(--gradient-blue);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
@keyframes fadeInUp{from{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-10px)}}
@keyframes shimmer{0%{background-position:-200% 0}100%{background-position:200% 0}}
@keyframes blink{50%{opacity:0}}

/* Back */
.back-home{position:fixed;top:16px;left:16px;z-index:99;padding:8px 16px;background:rgba(255,255,255,0.05);backdrop-filter:blur(12px);border:1px solid var(--border);border-radius:8px;color:var(--text-secondary);font-size:13px;transition:all .3s}
.back-home:hover{color:var(--purple);border-color:var(--border-hover);background:rgba(168,85,247,0.1)}

/* ═══════════ HERO — Grid: Text + Demo ═══════════ */
.hero{padding:80px 0 60px;position:relative;overflow:hidden;background:
    radial-gradient(ellipse 80% 60% at 50% 40%, rgba(168,85,247,0.12) 0%, transparent 70%),
    radial-gradient(ellipse 50% 50% at 80% 20%, rgba(59,130,246,0.08) 0%, transparent 60%),
    radial-gradient(ellipse 40% 60% at 15% 80%, rgba(139,92,246,0.06) 0%, transparent 50%),
    radial-gradient(ellipse 30% 40% at 90% 70%, rgba(236,72,153,0.05) 0%, transparent 50%)
}
.hero-bg{position:absolute;inset:0}
.hero-bg::before{content:'';position:absolute;width:700px;height:700px;background:var(--purple);opacity:.08;border-radius:50%;top:-250px;left:15%;filter:blur(140px);animation:heroPulse 8s ease-in-out infinite}
.hero-bg::after{content:'';position:absolute;width:500px;height:500px;background:var(--blue);opacity:.06;border-radius:50%;bottom:-150px;right:-50px;filter:blur(120px);animation:heroPulse 8s ease-in-out 4s infinite}
@keyframes heroPulse{0%,100%{opacity:.06;transform:scale(1)}50%{opacity:.1;transform:scale(1.1)}}

.hero-centered{position:relative;z-index:2;text-align:center;max-width:900px;margin:0 auto;animation:fadeInUp .6s ease both}
.hero-chips{display:flex;justify-content:center;gap:12px;margin-bottom:28px;flex-wrap:wrap}
.hero-chip{display:inline-flex;align-items:center;gap:6px;padding:6px 16px;border-radius:9999px;font-size:13px;font-weight:600;color:var(--text-secondary);background:rgba(255,255,255,0.05);border:1px solid rgba(255,255,255,0.1);backdrop-filter:blur(8px)}
.hero-chip i{font-size:11px;color:var(--purple)}
.hero-badge{display:inline-flex;align-items:center;gap:8px;padding:10px 22px;border-radius:9999px;font-size:15px;font-weight:600;color:var(--purple);background:rgba(168,85,247,0.1);border:1px solid rgba(168,85,247,0.2);margin-bottom:24px}
.hero h1{font-family:'DTPhudu','Be Vietnam Pro',sans-serif;font-size:clamp(40px,6vw,72px);font-weight:900;line-height:1.1;margin-bottom:24px;letter-spacing:1px}
.hero-desc{font-size:18px;color:var(--text-secondary);margin-bottom:36px;max-width:680px;margin-left:auto;margin-right:auto;line-height:1.8}
.hero-pain-grid{display:grid;grid-template-columns:repeat(3, 1fr);gap:20px;margin-top:40px;margin-bottom:48px;text-align:left}
.pain-card{background:rgba(255,255,255,0.03);border:1px solid rgba(255,255,255,0.1);padding:24px 20px;border-radius:16px;backdrop-filter:blur(10px);transition:all 0.3s;display:flex;flex-direction:column;gap:14px;animation:fadeInUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) both;color:var(--text-secondary);font-size:15.5px;line-height:1.6}
.pain-card:nth-child(1){animation-delay:0.1s;border-top:2px solid var(--orange)}
.pain-card:nth-child(2){animation-delay:0.2s;border-top:2px solid var(--red)}
.pain-card:nth-child(3){animation-delay:0.3s;border-top:2px solid var(--purple)}
.pain-card:hover{transform:translateY(-4px);background:rgba(255,255,255,0.06);border-color:rgba(255,255,255,0.2);box-shadow:var(--shadow-lg)}
.pain-card i.pc-icon{font-size:26px}
.pain-card:nth-child(1) i.pc-icon{color:var(--orange)}
.pain-card:nth-child(2) i.pc-icon{color:var(--red)}
.pain-card:nth-child(3) i.pc-icon{color:var(--purple)}
.pain-card strong{color:var(--text-primary);font-weight:700}
.pain-card span{display:block}
@media(max-width:768px){ .hero-pain-grid{grid-template-columns:1fr;gap:16px;} }
.hero-actions{display:flex;gap:14px;margin-bottom:36px;flex-wrap:wrap;justify-content:center}
.btn-primary-glow{display:inline-flex;align-items:center;gap:8px;padding:16px 32px;background:var(--gradient-purple);color:#fff;border:none;border-radius:var(--radius);font-size:17px;font-weight:600;transition:all .3s;box-shadow:var(--shadow-glow);position:relative;overflow:hidden}
.btn-primary-glow:hover{transform:translateY(-2px);box-shadow:0 0 40px var(--purple-glow)}
.btn-primary-glow::after{content:'';position:absolute;inset:0;background:linear-gradient(90deg,transparent,rgba(255,255,255,.15),transparent);transform:translateX(-100%);animation:shimmer 3s infinite}
.btn-ghost{display:inline-flex;align-items:center;gap:8px;padding:16px 32px;background:transparent;border:1px solid var(--border);color:var(--text-secondary);border-radius:var(--radius);font-size:17px;font-weight:500;transition:all .3s}
.btn-ghost:hover{border-color:var(--border-hover);color:var(--text-primary)}
.hero-stats{display:inline-flex;align-items:center;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:20px 36px;backdrop-filter:blur(12px)}
.hero-stat{text-align:center;padding:0 28px}
.hero-stat__num{display:block;font-size:30px;font-weight:800;font-family:var(--mono)}
.hero-stat__label{font-size:14px;color:var(--text-muted);font-weight:500}
.hero-stat-divider{width:1px;height:44px;background:var(--border)}

/* Hero Demo Column */
.hero-demo-col{animation:fadeInUp .6s ease .2s both}

/* Mock Device */
.mock-device{background:rgba(255,255,255,0.03);border:1px solid var(--border);border-radius:var(--radius-xl);overflow:hidden;box-shadow:var(--shadow-xl),0 0 60px rgba(168,85,247,0.06);backdrop-filter:blur(10px)}
.mock-topbar{display:flex;align-items:center;gap:6px;padding:10px 14px;background:rgba(255,255,255,0.04);border-bottom:1px solid var(--border)}
.dot{width:10px;height:10px;border-radius:50%}.dot.r{background:#ef4444}.dot.y{background:#f59e0b}.dot.g{background:#22c55e}
.mock-title{margin-left:auto;font-size:12px;font-weight:700;color:var(--text-muted);letter-spacing:1px}
.mock-status{font-size:11px;font-weight:600;color:var(--green);margin-left:8px}
.mock-body{padding:14px}
.mock-stats-row{display:flex;gap:8px;margin-bottom:10px}
.ms{flex:1;background:rgba(255,255,255,0.04);border:1px solid var(--border);padding:8px;border-radius:10px;text-align:center;transition:all .3s}
.ms.pop{animation:msPop .4s ease}
@keyframes msPop{0%{transform:scale(1)}50%{transform:scale(1.08)}100%{transform:scale(1)}}
.ms-n{display:block;font-size:20px;font-weight:800;font-family:var(--mono);transition:all .3s}
.ms-l{font-size:10px;color:var(--text-muted)}
.ms-n.orange{color:var(--orange)}.ms-n.green{color:var(--green)}.ms-n.red-c{color:var(--red)}
.mock-scanner-bar{display:flex;align-items:center;gap:10px;padding:8px 12px;background:rgba(255,255,255,0.04);border:2px solid var(--border);border-radius:10px;margin-bottom:10px;font-family:var(--mono);font-size:13px;color:var(--text-muted);transition:border-color .3s}
.mock-scanner-bar.active{border-color:var(--purple)}
.typing-text{color:var(--text-primary);flex:1;min-height:18px}
.cursor{animation:blink 1s step-end infinite;color:var(--purple)}
.mock-scan-btn{padding:4px 12px;background:var(--gradient-purple);color:#fff;border-radius:6px;font-size:11px;font-weight:700;font-family:var(--font);transition:all .3s}
.mock-scan-btn.pressed{transform:scale(.92);opacity:.7}
.mock-flash{padding:10px 14px;border-radius:10px;text-align:center;font-weight:700;font-size:13px;margin-bottom:10px;opacity:0;max-height:0;overflow:hidden;transition:all .4s cubic-bezier(.4,0,.2,1)}
.mock-flash.show{opacity:1;max-height:60px;padding:10px 14px}
.mock-flash.success{color:var(--green);background:var(--green-bg);border:1px solid var(--green-border)}
.mock-flash.error{color:var(--red);background:var(--red-bg);border:1px solid var(--red-border)}
.mock-flash.warning{color:var(--orange);background:var(--orange-bg);border:1px solid var(--orange-border)}
.mock-sound{display:flex;justify-content:center;gap:3px;height:0;overflow:hidden;transition:height .3s}
.mock-sound.show{height:24px;margin-bottom:8px}
.mock-sound span{display:block;width:3px;background:var(--green);border-radius:2px;animation:sndBar .4s ease infinite alternate}
.mock-sound.warning span{background:var(--orange)}
.mock-sound.error span{background:var(--red)}
.mock-sound span:nth-child(1){animation-delay:0s}
.mock-sound span:nth-child(2){animation-delay:.08s}
.mock-sound span:nth-child(3){animation-delay:.16s}
.mock-sound span:nth-child(4){animation-delay:.24s}
.mock-sound span:nth-child(5){animation-delay:.32s}
@keyframes sndBar{from{height:4px}to{height:20px}}
.mock-table{border:1px solid var(--border);border-radius:10px;overflow:hidden}
.mock-table-header{display:grid;grid-template-columns:50px 1fr 60px 80px;gap:4px;padding:6px 10px;background:rgba(255,255,255,0.04);font-size:10px;font-weight:700;color:var(--text-muted);text-transform:uppercase;letter-spacing:.5px}
.mock-table-body{max-height:160px;overflow-y:auto}
.mock-table-row{display:grid;grid-template-columns:50px 1fr 60px 80px;gap:4px;padding:7px 10px;border-top:1px solid var(--border);font-size:11px;font-family:var(--mono);align-items:center;animation:rowSlideIn .5s cubic-bezier(.4,0,.2,1)}
@keyframes rowSlideIn{from{opacity:0;transform:translateY(-12px);background:rgba(34,197,94,.08)}to{opacity:1;transform:translateY(0);background:transparent}}
.mock-table-row .row-src{font-size:14px}
.mock-table-row .row-tracking{color:var(--text-primary);font-weight:500;font-size:10px}
.mock-table-row .row-dvvc{font-size:10px;font-weight:700;padding:2px 6px;border-radius:4px;text-align:center}
.row-dvvc.spx{color:#ee4d2d;background:rgba(238,77,45,.15)}
.row-dvvc.jt{color:#ff6b6b;background:rgba(255,107,107,.12)}
.row-dvvc.ghn{color:#ff9800;background:rgba(255,152,0,.12)}
.row-dvvc.best{color:#ffb74d;background:rgba(255,183,77,.12)}
.row-dvvc.vtp{color:#ef5350;background:rgba(239,83,80,.12)}
.mock-table-row .row-status{font-size:10px;font-weight:700;color:var(--green)}

/* ═══════════ SCENARIOS SECTION — 2-Col Layout ═══════════ */
.scenarios-section{padding:100px 0;border-top:1px solid var(--border);position:relative;overflow:hidden}
.scenarios-section::before{content:'';position:absolute;width:500px;height:500px;background:var(--red);opacity:.04;border-radius:50%;top:-150px;right:-100px;filter:blur(120px);pointer-events:none}
.scenarios-section::after{content:'';position:absolute;width:400px;height:400px;background:var(--orange);opacity:.03;border-radius:50%;bottom:-100px;left:-80px;filter:blur(100px);pointer-events:none}
.section-badge{display:inline-flex;align-items:center;gap:8px;padding:8px 18px;border-radius:9999px;font-size:15px;font-weight:600;color:var(--purple);background:rgba(168,85,247,0.1);border:1px solid rgba(168,85,247,0.2);margin-bottom:16px}
.section-badge--red{color:var(--red);background:var(--red-bg);border-color:var(--red-border)}
.section-badge--green{color:var(--green);background:var(--green-bg);border-color:var(--green-border)}
.section-center-header{text-align:center;margin-bottom:64px}
.section-center-header h2{font-size:clamp(28px,4.5vw,44px);font-weight:800;line-height:1.3}
.section-subtitle{font-size:20px;color:var(--text-secondary);margin-top:18px;line-height:1.7}

/* Scenario Row — 2 columns */
.scenario-row{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;margin-bottom:96px;position:relative;z-index:2}
.scenario-row:last-child{margin-bottom:0}
.scenario-row--reverse{direction:rtl}
.scenario-row--reverse > *{direction:ltr}

/* Horizontal connector line between columns */
.scenario-row::before{content:'';position:absolute;top:50%;left:calc(50% - 28px);width:56px;height:0;border-top:2px solid rgba(255,255,255,0.25);z-index:10;pointer-events:none}

/* SVG curved connector between rows */
.scenario-connector{display:block;width:60%;height:96px;margin:0 auto;position:relative;z-index:5;pointer-events:none}

/* Problem Side — Card with white border */
.scenario-problem{display:flex;gap:24px;align-items:flex-start;background:var(--bg-card);border:1px solid rgba(255,255,255,0.1);border-radius:var(--radius-xl);padding:36px 32px;backdrop-filter:blur(12px);position:relative;overflow:hidden;transition:all .4s}
.scenario-problem::before{content:'';position:absolute;inset:0;background:linear-gradient(135deg,rgba(239,68,68,0.04),transparent 60%);pointer-events:none;border-radius:var(--radius-xl)}
.scenario-problem:hover{border-color:rgba(255,255,255,0.2);box-shadow:0 0 40px rgba(239,68,68,0.06),0 8px 32px rgba(0,0,0,0.2);transform:translateY(-4px)}
.problem-number{flex-shrink:0;width:56px;height:56px;display:flex;align-items:center;justify-content:center;background:var(--red-bg);border:2px solid var(--red-border);border-radius:50%;position:relative;z-index:1}
.problem-number span{font-size:18px;font-weight:800;color:var(--red);font-family:var(--mono)}
.problem-content{flex:1;position:relative;z-index:1}
.problem-content h3{font-size:clamp(20px,2.5vw,26px);font-weight:700;line-height:1.35;margin-bottom:16px}
.problem-content p{color:var(--text-secondary);font-size:17px;margin-bottom:20px;line-height:1.8}

/* Damage Box */
.damage-box{background:rgba(239,68,68,0.06);border:1px solid var(--red-border);border-radius:var(--radius);padding:20px 24px}
.damage-item{font-size:15px;color:var(--text-secondary);line-height:1.8;padding:4px 0}
.damage-item strong{color:var(--text-primary)}

/* Demo Side — Card with white border */
.scenario-demo{background:var(--bg-card);border:1px solid rgba(255,255,255,0.1);border-radius:var(--radius-xl);padding:24px;transition:all .4s;backdrop-filter:blur(12px);position:relative;overflow:hidden}
.scenario-demo::before{content:'';position:absolute;inset:0;background:linear-gradient(180deg,rgba(168,85,247,0.04),transparent 50%);pointer-events:none;border-radius:var(--radius-xl)}
.scenario-demo:hover{border-color:rgba(255,255,255,0.2);box-shadow:var(--shadow-glow);transform:translateY(-4px)}
.demo-block__label{margin-bottom:16px}
.demo-tag{display:inline-flex;align-items:center;gap:6px;padding:6px 14px;border-radius:9999px;font-size:13px;font-weight:700}
.demo-tag.red{color:var(--red);background:var(--red-bg);border:1px solid var(--red-border)}
.demo-tag.yellow{color:var(--orange);background:var(--orange-bg);border:1px solid var(--orange-border)}
.demo-tag.green{color:var(--green);background:var(--green-bg);border:1px solid var(--green-border)}
.demo-caption{font-size:15px;color:var(--text-secondary);margin-top:16px;text-align:center;line-height:1.6}

/* Tree Timeline Container */
.tree-timeline{position:relative;padding-left:48px}

/* Vertical line — white */
.tree-timeline::before{
    content:'';position:absolute;left:19px;top:20px;bottom:20px;width:2px;
    background:rgba(255,255,255,0.15);
    border-radius:2px;
}

/* Tree Node */
.tree-node{position:relative;margin-bottom:80px;
    opacity:1;transform:translateY(0);transition:opacity .8s cubic-bezier(.4,0,.2,1),transform .8s cubic-bezier(.4,0,.2,1);
}
.tree-node:last-child{margin-bottom:0}

/* Sequential reveal — hidden state */
.tree-node--hidden{opacity:0;transform:translateY(50px);pointer-events:none}
.tree-node--hidden .tree-node__dot{transform:scale(0)}
.tree-node--hidden .tree-connector-line{opacity:0}

/* Dot on the line — white border */
.tree-node__dot{
    position:absolute;left:-48px;top:28px;width:38px;height:38px;
    border-radius:50%;background:var(--bg-deep);border:2px solid rgba(255,255,255,0.4);
    display:flex;align-items:center;justify-content:center;z-index:3;
    box-shadow:0 0 20px rgba(255,255,255,0.08);
    transition:transform .5s cubic-bezier(.4,0,.2,1) .3s;
}
.tree-node__dot span{font-size:11px;font-weight:800;color:rgba(255,255,255,0.7);font-family:var(--mono)}

/* Horizontal connector from dot to card — white */
.tree-node__dot::after{
    content:'';position:absolute;left:100%;top:50%;width:28px;height:2px;
    background:rgba(255,255,255,0.15);
}

/* Curved connector between nodes */
.tree-connector-line{
    position:absolute;left:18px;bottom:-80px;width:2px;height:80px;
    background:rgba(255,255,255,0.15);z-index:1;
    transition:opacity .5s ease .6s;
}
.tree-node:last-child .tree-connector-line{display:none}

/* Card inside tree node — SINGLE COLUMN */
.tree-node__card{
    display:flex;flex-direction:column;gap:32px;
    background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-xl);
    padding:40px 44px;backdrop-filter:blur(8px);transition:all .4s;
    margin-left:18px;
}
.tree-node__card:hover{border-color:var(--border-hover);box-shadow:0 0 40px rgba(168,85,247,0.06)}

.tree-node__content h3{font-size:clamp(24px,3vw,32px);font-weight:700;line-height:1.35;margin-bottom:18px}
.tree-node__content p{color:var(--text-secondary);font-size:18px;margin-bottom:24px;line-height:1.8}
.damage-box{background:var(--red-bg);border:1px solid var(--red-border);border-radius:var(--radius);padding:22px 26px}
.damage-item{font-size:16px;color:var(--text-secondary);line-height:1.8;padding:5px 0}
.damage-item strong{color:var(--text-primary)}

/* Anim device inside card — limit width */
.tree-node__visual{max-width:560px}

/* Anim Device inside tree */
.anim-device{background:rgba(255,255,255,0.03);border:1px solid var(--border);border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-md);backdrop-filter:blur(10px)}
.anim-topbar{display:flex;align-items:center;gap:6px;padding:8px 12px;background:rgba(255,255,255,0.04);border-bottom:1px solid var(--border)}
.anim-app-name{margin-left:auto;font-size:11px;font-weight:700;color:var(--text-muted);letter-spacing:1px}
.anim-badges{display:flex;gap:6px;padding:8px 12px;flex-wrap:wrap}
.ab{padding:4px 10px;border-radius:8px;font-size:10px;font-weight:600;border:1px solid transparent;transition:all .3s}
.ab.orange{color:var(--orange);background:var(--orange-bg);border-color:var(--orange-border)}
.ab.green{color:var(--green);background:var(--green-bg);border-color:var(--green-border)}
.ab.red{color:var(--red);background:var(--red-bg);border-color:var(--red-border)}
.ab.gray{color:var(--text-muted);background:rgba(255,255,255,0.04);border-color:var(--border)}
.anim-badge-glow{animation:badgeGlow 2s ease infinite}
@keyframes badgeGlow{0%,100%{box-shadow:none}50%{box-shadow:0 0 12px rgba(34,197,94,.3)}}
.anim-scan-bar{display:flex;align-items:center;gap:8px;padding:8px 12px;margin:0 12px 8px;background:rgba(255,255,255,0.04);border:2px solid var(--border);border-radius:10px;font-family:var(--mono);font-size:12px;color:var(--text-muted);transition:border-color .3s}
.anim-scan-bar.active{border-color:var(--purple)}
.anim-dvvc{padding:3px 6px;border:1px solid var(--border);border-radius:4px;font-size:10px;background:rgba(255,255,255,0.06);color:var(--text-secondary);font-family:var(--font);pointer-events:none}
.anim-input{color:var(--text-primary);flex:1;min-height:16px;font-size:12px}
.anim-cursor{animation:blink 1s step-end infinite;color:var(--purple)}
.anim-btn{padding:4px 10px;background:var(--gradient-purple);color:#fff;border-radius:5px;font-size:10px;font-weight:700;font-family:var(--font)}
.anim-flash{padding:0;margin:0 12px;border-radius:10px;text-align:center;font-weight:700;font-size:12px;opacity:0;max-height:0;overflow:hidden;transition:all .4s cubic-bezier(.4,0,.2,1)}
.anim-flash.show{opacity:1;max-height:50px;padding:8px 12px;margin-bottom:8px}
.anim-flash.success{color:var(--green);background:var(--green-bg);border:1px solid var(--green-border)}
.anim-flash.error{color:var(--red);background:var(--red-bg);border:1px solid var(--red-border)}
.anim-flash.warning{color:var(--orange);background:var(--orange-bg);border:1px solid var(--orange-border)}
.anim-wave{display:flex;justify-content:center;gap:3px;height:0;overflow:hidden;transition:height .3s}
.anim-wave.show{height:20px;margin:0 12px 8px}
.anim-wave span{display:block;width:3px;background:var(--green);border-radius:2px;animation:sndBar .4s ease infinite alternate}
.anim-wave.error span{background:var(--red)}
.anim-wave.warning span{background:var(--orange)}
.anim-wave span:nth-child(1){animation-delay:0s}
.anim-wave span:nth-child(2){animation-delay:.08s}
.anim-wave span:nth-child(3){animation-delay:.16s}
.anim-wave span:nth-child(4){animation-delay:.24s}
.anim-wave span:nth-child(5){animation-delay:.32s}
.anim-mismatch-box{margin:8px 12px 12px;border:1px solid var(--red-border);border-radius:10px;overflow:hidden;opacity:0;max-height:0;transition:all .5s cubic-bezier(.4,0,.2,1)}
.anim-mismatch-box.show{opacity:1;max-height:100px}
.amm-header{padding:6px 10px;background:var(--red-bg);font-size:11px;font-weight:600;color:var(--red);border-bottom:1px solid var(--red-border)}
.amm-row{display:grid;grid-template-columns:30px 1fr 80px;padding:6px 10px;font-family:var(--mono);font-size:11px;animation:rowSlideIn .5s ease}
.amm-track{color:var(--text-primary);font-weight:500}
.amm-time{color:var(--text-muted);text-align:right}
.anim-order-table{margin:8px 12px 12px;border:1px solid var(--border);border-radius:10px;overflow:hidden}
.aot-header{display:grid;grid-template-columns:40px 1fr 50px;padding:5px 10px;background:rgba(255,255,255,0.04);font-size:9px;font-weight:700;color:var(--text-muted);text-transform:uppercase;letter-spacing:.5px}
.aot-row{display:grid;grid-template-columns:40px 1fr 50px;padding:6px 10px;border-top:1px solid var(--border);font-size:11px;align-items:center}
.aot-row.sc2-row{border-left:3px solid var(--green)}
.aot-row.sc2-row.blink{animation:rowBlink .5s ease 3}
@keyframes rowBlink{50%{background:rgba(245,158,11,.08)}}
.aot-ids{line-height:1.3;font-family:var(--mono)}.aot-ids b{font-size:11px;color:var(--text-primary)}.aot-ids small{font-size:9px;color:var(--text-muted)}
.anim-proof-table{margin:0 12px 8px;border:1px solid var(--border);border-radius:10px;overflow:hidden}
.apt-title{padding:6px 10px;background:rgba(255,255,255,0.04);font-size:11px;font-weight:600;color:var(--text-primary);display:flex;align-items:center;gap:6px}
.apt-title b{color:var(--purple);margin-left:auto;font-size:10px}
.apt-header{display:grid;grid-template-columns:60px 28px 1fr 40px 20px;padding:4px 8px;font-size:8px;font-weight:700;color:var(--text-muted);text-transform:uppercase;letter-spacing:.5px;border-bottom:1px solid var(--border)}
.apt-row{display:grid;grid-template-columns:60px 28px 1fr 40px 20px;padding:5px 8px;border-top:1px solid rgba(255,255,255,0.02);font-size:10px;font-family:var(--mono);align-items:center;opacity:0;animation:proofSlide 8s ease infinite;animation-delay:calc(var(--d) * .4s)}
@keyframes proofSlide{0%,5%{opacity:0;transform:translateX(-8px)}10%{opacity:1;transform:translateX(0)}80%{opacity:1}90%,100%{opacity:0}}
.apt-highlight{background:rgba(168,85,247,0.08);border-left:3px solid var(--purple)}
.apt-time{color:var(--purple);font-weight:600;font-size:10px}
.apt-ids{line-height:1.2}.apt-ids b{font-size:10px;color:var(--text-primary)}.apt-ids br+*{font-size:8px;color:var(--text-muted)}
.apt-ok{color:var(--green);font-weight:700;text-align:center}
.anim-proof-speech{padding:10px 12px;text-align:center;opacity:0;animation:speechIn 8s ease infinite;animation-delay:2s}
@keyframes speechIn{0%,25%{opacity:0;transform:translateY(10px)}35%{opacity:1;transform:translateY(0)}80%{opacity:1}90%,100%{opacity:0}}
.speech-bubble{background:var(--gradient-purple);color:#fff;padding:8px 14px;border-radius:10px 10px 10px 4px;display:inline-block;font-size:13px;margin-bottom:6px;box-shadow:var(--shadow-glow)}
.proof-checkmate{color:var(--green);font-weight:700;font-size:14px}

/* ═══════════ SOLUTION ═══════════ */
.solution{padding:120px 0;background:rgba(168,85,247,0.03);border-top:1px solid var(--border);border-bottom:1px solid var(--border);position:relative;overflow:hidden}
.solution::before{content:'';position:absolute;width:600px;height:600px;background:var(--purple);opacity:.05;border-radius:50%;top:-200px;left:-150px;filter:blur(140px);pointer-events:none}
.solution::after{content:'';position:absolute;width:400px;height:400px;background:var(--green);opacity:.04;border-radius:50%;bottom:-150px;right:-100px;filter:blur(120px);pointer-events:none}
.sol-header{text-align:center;margin-bottom:64px;position:relative;z-index:2}
.sol-tag{display:inline-block;padding:8px 18px;border-radius:9999px;font-size:16px;font-weight:600;color:var(--purple);background:rgba(168,85,247,0.1);border:1px solid rgba(168,85,247,0.2);margin-bottom:20px}
.sol-header h2{font-size:clamp(28px,4.5vw,44px);font-weight:800;margin-bottom:18px}
.sol-header p{color:var(--text-secondary);font-size:19px;max-width:600px;margin:0 auto;line-height:1.7}
.sol-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;position:relative;z-index:2}
.sol-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-xl);padding:44px 36px;text-align:center;transition:all .4s;position:relative;overflow:hidden;backdrop-filter:blur(12px)}
.sol-card::before{content:'';position:absolute;inset:0;background:linear-gradient(180deg,rgba(168,85,247,0.04),transparent 50%);pointer-events:none;border-radius:var(--radius-xl)}
.sol-card:hover{transform:translateY(-8px);box-shadow:0 0 50px var(--purple-glow),0 12px 40px rgba(0,0,0,0.3);border-color:var(--purple);background:var(--bg-card-hover)}
.sol-icon{font-size:56px;margin-bottom:22px;display:inline-block}
.sol-card h3{font-size:20px;font-weight:700;margin-bottom:16px;letter-spacing:.5px}
.sol-card p{font-size:16px;color:var(--text-secondary);line-height:1.8}
.sol-mini-anim{position:absolute;inset:0;pointer-events:none;border-radius:var(--radius-xl);opacity:0}
.red-flash-anim{animation:miniRedFlash 4s ease infinite 0s}
.yellow-flash-anim{animation:miniYellowFlash 4s ease infinite 1.3s}
.green-flash-anim{animation:miniGreenFlash 4s ease infinite 2.6s}
@keyframes miniRedFlash{0%,90%,100%{opacity:0}92%{opacity:1;background:var(--red-bg)}}
@keyframes miniYellowFlash{0%,90%,100%{opacity:0}92%{opacity:1;background:var(--orange-bg)}}
@keyframes miniGreenFlash{0%,90%,100%{opacity:0}92%{opacity:1;background:var(--green-bg)}}
.red-glow{filter:drop-shadow(0 0 18px rgba(239,68,68,.5))}
.yellow-glow{filter:drop-shadow(0 0 18px rgba(245,158,11,.5))}
.green-glow{filter:drop-shadow(0 0 18px rgba(34,197,94,.5))}

/* ═══════════ SOCIAL PROOF ═══════════ */
.social-proof{padding:120px 0;text-align:center;position:relative;overflow:hidden}
.social-proof::before{content:'';position:absolute;inset:0;background-image:radial-gradient(rgba(168,85,247,0.06) 1px,transparent 1px);background-size:32px 32px;pointer-events:none}
.social-proof::after{content:'';position:absolute;width:500px;height:500px;background:var(--blue);opacity:.04;border-radius:50%;top:50%;left:50%;transform:translate(-50%,-50%);filter:blur(150px);pointer-events:none}
.social-proof h2{font-size:clamp(28px,4.5vw,42px);font-weight:800;margin-bottom:56px;position:relative;z-index:2}
.proof-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;position:relative;z-index:2}
.reason-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-xl);padding:40px 28px;transition:all .4s;backdrop-filter:blur(12px);position:relative;overflow:hidden}
.reason-card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:var(--gradient-purple);opacity:0;transition:opacity .3s;border-radius:var(--radius-xl) var(--radius-xl) 0 0}
.reason-card:hover{transform:translateY(-6px);border-color:var(--border-hover);box-shadow:0 0 40px var(--purple-glow),0 8px 32px rgba(0,0,0,0.25);background:var(--bg-card-hover)}
.reason-card:hover::before{opacity:1}
.reason-icon{font-size:44px;margin-bottom:16px;display:inline-block}
.reason-card h4{font-size:20px;font-weight:700;margin-bottom:10px}
.reason-card p{font-size:16px;color:var(--text-secondary);line-height:1.7}

/* ═══════════ PRICING — PREMIUM REDESIGN ═══════════ */
.pricing-section{padding:100px 0 120px;position:relative;overflow:hidden;border-top:1px solid var(--border)}
.pricing-section::before{content:'';position:absolute;inset:0;background:radial-gradient(ellipse 80% 50% at 50% 100%, rgba(168,85,247,0.08), transparent 70%);pointer-events:none}
.pricing-section::after{content:'';position:absolute;width:500px;height:500px;background:var(--purple);opacity:.05;border-radius:50%;bottom:-200px;right:-100px;filter:blur(140px);pointer-events:none}
.pricing-header-section{text-align:center;margin-bottom:64px;position:relative;z-index:2}
.pricing-header-section h2{font-family:'DTPhudu','Be Vietnam Pro',sans-serif;font-size:clamp(28px,4.5vw,44px);font-weight:900;margin-bottom:18px}
.pricing-header-section p{color:var(--text-secondary);font-size:19px;max-width:600px;margin:0 auto;line-height:1.7}
.pricing-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:0;align-items:stretch;position:relative;z-index:2;max-width:920px;margin:0 auto}

/* Base Card */
.pricing-card{background:rgba(255,255,255,0.02);border:1px solid rgba(255,255,255,0.08);padding:44px 32px 36px;transition:all .4s;position:relative;display:flex;flex-direction:column}
.pricing-card:first-child{border-radius:var(--radius-xl) 0 0 var(--radius-xl)}
.pricing-card:last-child{border-radius:0 var(--radius-xl) var(--radius-xl) 0}
.pricing-card:hover{background:rgba(255,255,255,0.04)}

/* Featured Card — Vĩnh Viễn */
.pricing-card--featured{background:linear-gradient(180deg, rgba(168,85,247,0.1) 0%, rgba(99,102,241,0.05) 50%, rgba(255,255,255,0.02) 100%);border:1.5px solid rgba(168,85,247,0.4);border-radius:var(--radius-xl)!important;transform:scale(1.06);z-index:3;box-shadow:0 0 60px rgba(168,85,247,0.15), 0 20px 60px rgba(0,0,0,0.3)}
.pricing-card--featured:hover{transform:scale(1.08);box-shadow:0 0 80px rgba(168,85,247,0.2), 0 24px 64px rgba(0,0,0,0.35)}

/* Ribbon Badge */
.pricing-badge{position:absolute;top:0;left:50%;transform:translateX(-50%);background:var(--gradient-purple);color:#fff;padding:6px 28px 8px;border-radius:0 0 14px 14px;font-size:12px;font-weight:800;letter-spacing:1.5px;text-transform:uppercase;white-space:nowrap;box-shadow:0 4px 20px rgba(168,85,247,0.3)}

/* Header */
.pricing-header{text-align:center;margin-bottom:28px;padding-top:8px}
.pricing-card--featured .pricing-header{padding-top:36px}
.pricing-label{font-size:11px;color:var(--text-muted);font-weight:700;text-transform:uppercase;letter-spacing:2px;display:block;margin-bottom:6px}
.pricing-name{font-size:26px;font-weight:800;margin:0 0 20px;letter-spacing:.5px}
.pricing-card--featured .pricing-name{font-size:30px;background:var(--gradient-purple);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.pricing-price{font-size:44px;font-weight:900;color:var(--text-primary);line-height:1;letter-spacing:-1px}
.pricing-card--featured .pricing-price{font-size:52px;color:var(--purple);text-shadow:0 0 40px var(--purple-glow)}
.pricing-price small{font-size:18px;font-weight:500;color:var(--text-muted);vertical-align:super}
.pricing-per{display:block;font-size:13px;color:var(--text-muted);margin-top:8px;font-weight:500}

/* Divider line */
.pricing-divider{width:48px;height:2px;background:var(--border);margin:0 auto 24px;border-radius:2px}
.pricing-card--featured .pricing-divider{background:var(--gradient-purple);width:64px;height:3px}

/* Button */
.pricing-btn{display:block;text-align:center;padding:14px 24px;border:1.5px solid rgba(255,255,255,0.15);border-radius:10px;font-size:15px;font-weight:600;color:var(--text-primary);background:transparent;transition:all .3s;margin-bottom:24px;text-decoration:none;letter-spacing:.3px}
.pricing-btn:hover{border-color:var(--purple);color:var(--purple);background:rgba(168,85,247,0.06);transform:translateY(-2px)}
.pricing-btn--featured{background:linear-gradient(135deg, #f59e0b, #f97316);color:#000;border:none;font-size:16px;font-weight:800;padding:16px 24px;border-radius:12px;box-shadow:0 4px 24px rgba(245,158,11,0.35);position:relative;overflow:hidden}
.pricing-btn--featured::after{content:'';position:absolute;inset:0;background:linear-gradient(90deg,transparent,rgba(255,255,255,.25),transparent);transform:translateX(-100%);animation:shimmer 3s infinite}
.pricing-btn--featured:hover{transform:translateY(-3px);box-shadow:0 8px 36px rgba(245,158,11,0.45);color:#000}

/* Save Tag */
.pricing-save{text-align:center;font-size:12px;font-weight:700;color:var(--green);background:rgba(34,197,94,0.08);border:1px solid rgba(34,197,94,0.15);padding:6px 16px;border-radius:9999px;margin-bottom:20px;display:inline-flex;align-items:center;gap:6px;align-self:center}
.pricing-save--hot{color:var(--orange);background:rgba(245,158,11,0.08);border-color:rgba(245,158,11,0.15);font-weight:800}

/* Features List */
.pricing-features{list-style:none;padding:0;margin:0;flex:1}
.pricing-features li{padding:11px 0;font-size:14px;color:var(--text-secondary);border-top:1px solid rgba(255,255,255,0.04);display:flex;align-items:center;gap:10px;line-height:1.5}
.pricing-features li:first-child{border-top:1px solid rgba(255,255,255,0.08);padding-top:16px;margin-top:0}
.pricing-features li i{color:rgba(255,255,255,0.2);font-size:12px;flex-shrink:0;width:18px;text-align:center}
.pricing-features li i.fa-check{color:var(--green)}
.pricing-features li i.fa-times{color:rgba(255,255,255,0.12)}
.pricing-card--featured .pricing-features li i.fa-check{color:var(--purple)}

/* ═══════════ SCENARIO IFRAME (tool thực tế) ═══════════ */
.scenario-iframe-wrap{border-radius:12px;overflow:hidden;border:1px solid rgba(255,255,255,0.08);box-shadow:0 0 40px rgba(0,0,0,0.3)}
.scenario-iframe{width:100%;height:220px;border:none;display:block;background:#fff}
.scenario-iframe--proof{height:420px}

/* ═══════════ DEMO IFRAME (inside hero) ═══════════ */
.demo-iframe-wrap{position:relative;z-index:2;max-width:1000px;margin:48px auto 0;border-radius:var(--radius-xl);overflow:hidden;border:1px solid rgba(255,255,255,0.1);box-shadow:0 0 60px rgba(168,85,247,0.08),0 20px 60px rgba(0,0,0,0.4)}
.demo-iframe{width:100%;height:680px;border:none;display:block;background:#0a0a0a}

/* Footer */
.footer{text-align:center;padding:32px;color:var(--text-muted);font-size:14px;border-top:1px solid var(--border);background:rgba(0,0,0,0.2)}
.footer a{color:var(--purple);font-weight:600}

/* ═══════════ RESPONSIVE ═══════════ */
@media(max-width:768px){
    .hero-centered{max-width:100%}
    .hero h1{font-size:28px;letter-spacing:0}
    .pricing-grid{grid-template-columns:1fr;gap:24px;max-width:400px;margin-left:auto;margin-right:auto}
    .pricing-card:first-child, .pricing-card:last-child { border-radius:var(--radius-xl) }
    .pricing-card--featured{transform:scale(1)}
    .scenario-row{grid-template-columns:1fr;gap:32px;margin-bottom:60px}
    .scenario-row--reverse{direction:ltr}
    .scenario-row::before{display:none}
    .scenario-connector{display:none}
    .scenario-problem{flex-direction:column;gap:16px;padding:24px}
    .problem-number{width:44px;height:44px}
    .sol-grid{grid-template-columns:1fr}
    .proof-grid{grid-template-columns:1fr 1fr}
    .hero-stats{flex-direction:column;gap:10px;padding:16px 20px}
    .hero-stat-divider{width:60px;height:1px}
}
@media(max-width:480px){
    .proof-grid{grid-template-columns:1fr}
    .cta-btns,.hero-actions{flex-direction:column;align-items:center}
}