@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@300;400;600;800;900&display=swap');
*{margin:0;padding:0;box-sizing:border-box}
:root{--bg:#06060e;--card:#0f1526;--card-h:#162040;--accent:#00d2ff;--accent2:#7b61ff;--green:#00e696;--orange:#ff8c00;--pink:#ff4d8d;--yellow:#ffd600;--red:#ff4444;--white:#eef;--gray:#8899aa;--muted:#556;--radius:18px}
html{scroll-behavior:smooth}
body{font-family:'Noto Sans SC',system-ui,sans-serif;background:var(--bg);color:var(--white);overflow-x:hidden;line-height:1.7;transition:opacity .5s}
nav{position:fixed;top:0;left:0;right:0;z-index:200;background:rgba(6,6,14,.9);backdrop-filter:blur(24px);border-bottom:1px solid rgba(255,255,255,.04);display:flex;align-items:center;gap:4px;padding:10px 20px;overflow-x:auto;scrollbar-width:none}
nav::-webkit-scrollbar{display:none}
nav a{color:var(--gray);text-decoration:none;font-size:13px;padding:7px 14px;border-radius:20px;white-space:nowrap;transition:.3s}
nav a:hover,nav a.active{color:var(--accent);background:rgba(0,210,255,.08)}
.sec{padding:80px 60px 60px;position:relative}
.sec-title{font-size:44px;font-weight:900;margin-bottom:10px;background:linear-gradient(135deg,var(--accent),var(--accent2));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.sec-sub{font-size:20px;color:var(--gray);margin-bottom:48px;max-width:760px;line-height:1.5}
.bar{width:70px;height:4px;border-radius:2px;background:linear-gradient(90deg,var(--accent),var(--accent2));margin-bottom:18px}
.cg{display:grid;gap:24px;grid-template-columns:repeat(auto-fit,minmax(300px,1fr))}
.card{background:var(--card);border:1px solid rgba(255,255,255,.05);border-radius:var(--radius);padding:32px 28px;position:relative;overflow:hidden;cursor:default;transition:transform .45s cubic-bezier(.23,1,.32,1),background .35s,box-shadow .45s}
.card::after{content:'';position:absolute;top:0;left:0;right:0;height:3px;border-radius:var(--radius) var(--radius) 0 0;opacity:.7}
.card:hover{transform:translateY(-5px);background:var(--card-h);box-shadow:0 20px 50px rgba(0,0,0,.3)}
.card .ic{font-size:44px;margin-bottom:14px;display:block}
.card .t{font-size:22px;font-weight:700;margin-bottom:8px}
.card .d{font-size:16px;color:var(--gray);line-height:1.5}
.card .ov{position:absolute;inset:0;background:rgba(15,21,38,.96);border-radius:var(--radius);padding:30px 28px;display:flex;flex-direction:column;justify-content:center;opacity:0;transform:translateY(6px);pointer-events:none;transition:opacity .35s ease,transform .4s cubic-bezier(.23,1,.32,1)}
.card:hover .ov{opacity:1;transform:translateY(0);pointer-events:auto}
.ov .ov-t{font-size:20px;font-weight:700;margin-bottom:10px}
.ov .ov-d{font-size:15px;color:#a0b4c8;line-height:1.9}
.c-blue::after{background:var(--accent)}.c-blue .t,.c-blue .ov-t{color:var(--accent)}
.c-purple::after{background:var(--accent2)}.c-purple .t,.c-purple .ov-t{color:var(--accent2)}
.c-green::after{background:var(--green)}.c-green .t,.c-green .ov-t{color:var(--green)}
.c-orange::after{background:var(--orange)}.c-orange .t,.c-orange .ov-t{color:var(--orange)}
.c-pink::after{background:var(--pink)}.c-pink .t,.c-pink .ov-t{color:var(--pink)}
.c-yellow::after{background:var(--yellow)}.c-yellow .t,.c-yellow .ov-t{color:var(--yellow)}
#hero{display:flex;flex-direction:column;justify-content:center;align-items:center;text-align:center;min-height:100vh;padding-top:0;position:relative;overflow:hidden}
#heroCanvas{position:absolute;inset:0;z-index:0;pointer-events:none;opacity:.35}
.hero-content{position:relative;z-index:1}
.hero-title{display:flex;justify-content:center;gap:8px;opacity:0;animation:heroIn 1s .3s cubic-bezier(.23,1,.32,1) forwards;margin-bottom:48px}
.ht-a,.ht-i{font-size:140px;font-weight:900;line-height:1;cursor:pointer;transition:transform .3s,text-shadow .3s;position:relative;display:inline-block}
.ht-a:hover{transform:scale(1.08);text-shadow:0 0 40px rgba(0,210,255,.4)}
.ht-i:hover{transform:scale(1.08);text-shadow:0 0 40px rgba(255,77,141,.4)}
.ht-tip{position:absolute;top:100%;left:50%;transform:translateX(-50%) translateY(10px);white-space:nowrap;font-size:20px;font-weight:700;opacity:0;pointer-events:none;transition:opacity .4s,transform .4s cubic-bezier(.23,1,.32,1);padding:8px 20px;border-radius:14px;background:rgba(15,21,38,.9);border:1px solid rgba(255,255,255,.1)}
.ht-a .ht-tip{color:var(--accent)}
.ht-i .ht-tip{color:var(--pink)}
.ht-a:hover .ht-tip,.ht-i:hover .ht-tip{opacity:1;transform:translateX(-50%) translateY(30px)}
.ht-a{color:var(--accent)}
.ht-i{color:var(--pink)}
@keyframes heroIn{0%{opacity:0;transform:scale(.6);filter:blur(20px)}100%{opacity:1;transform:scale(1);filter:blur(0)}}
.hero-words{display:flex;justify-content:center;gap:60px;margin-top:8px;margin-bottom:20px}
.hw{display:flex;align-items:center;gap:8px;opacity:0;transform:translateY(12px);transition:opacity .3s,transform .3s}
.hw-a,.hw-i{cursor:default}
.hw-a .hw-full,.hw-a .hw-arrow,.hw-a .hw-cn{opacity:0!important;transform:translateX(-8px);transition:opacity .4s,transform .4s cubic-bezier(.23,1,.32,1)}
.hw-i .hw-full,.hw-i .hw-arrow,.hw-i .hw-cn{opacity:0!important;transform:translateX(-8px);transition:opacity .4s,transform .4s cubic-bezier(.23,1,.32,1)}
.hw-a:hover .hw-full,.hw-a:hover .hw-arrow,.hw-a:hover .hw-cn,.hw-i:hover .hw-full,.hw-i:hover .hw-arrow,.hw-i:hover .hw-cn,.hw-show .hw-full,.hw-show .hw-arrow,.hw-show .hw-cn{opacity:1!important;transform:translateX(0)}
.hw-a{animation:letterOnly .7s 1.2s cubic-bezier(.23,1,.32,1) forwards}
.hw-i{animation:letterOnly .7s 1.5s cubic-bezier(.23,1,.32,1) forwards}
@keyframes letterOnly{to{opacity:1;transform:translateY(0)}}
.hw-letter{font-size:20px;font-weight:900;color:var(--gray);width:20px;text-align:center}
.hw-arrow{color:var(--muted);font-size:14px}
.hw-full{font-size:20px;font-weight:700;letter-spacing:1px}
.hw-a .hw-full{color:var(--accent)}
.hw-i .hw-full{color:var(--pink)}
.hw-cn{font-size:16px;color:var(--gray);font-weight:400}
.hero-line{width:0;height:3px;background:linear-gradient(90deg,var(--accent),var(--accent2),var(--pink));margin:16px auto 20px;border-radius:2px;animation:lineGrow .8s 1.8s cubic-bezier(.23,1,.32,1) forwards}
.hero-desc{font-size:18px;color:var(--gray);margin-top:24px;opacity:0;animation:fadeUp .6s 2s cubic-bezier(.23,1,.32,1) forwards;letter-spacing:1px}
@keyframes lineGrow{to{width:280px}}
.hero-icons{display:flex;gap:20px;justify-content:center;margin-bottom:40px}
.hi{font-size:52px;display:inline-block;animation:hiFloat 3s ease-in-out infinite,hiPop .6s var(--d) cubic-bezier(.34,1.56,.64,1) both;filter:drop-shadow(0 4px 12px rgba(0,0,0,.3));transition:transform .3s}
.hi:hover{transform:scale(1.3)!important;filter:drop-shadow(0 8px 20px rgba(0,0,0,.4))}
@keyframes hiPop{0%{opacity:0;transform:scale(0) rotate(-20deg)}100%{opacity:1;transform:scale(1) rotate(0)}}
@keyframes hiFloat{0%,100%{transform:translateY(0)}50%{transform:translateY(-8px)}}
/* ========== ANIMATIONS ========== */
/* Hero entrance */
#hero h1{animation:heroTitle 1.2s cubic-bezier(.23,1,.32,1) forwards}
@keyframes heroTitle{0%{opacity:0;transform:translateY(40px) scale(.9);filter:blur(10px)}100%{opacity:1;transform:translateY(0) scale(1);filter:blur(0)}}
#hero .sub{animation:fadeUp .8s .3s cubic-bezier(.23,1,.32,1) both}
.hero-emoji{font-size:72px;letter-spacing:20px;animation:fl 3s ease-in-out infinite}
@keyframes fl{0%,100%{transform:translateY(0)}50%{transform:translateY(-10px)}}
.hero-emoji span,.hero-emoji{animation:emojiPop .5s .5s cubic-bezier(.34,1.56,.64,1) both}
@keyframes emojiPop{0%{opacity:0;transform:scale(0) rotate(-20deg)}100%{opacity:1;transform:scale(1) rotate(0)}}

/* Generic fade up */
@keyframes fadeUp{0%{opacity:0;transform:translateY(30px)}100%{opacity:1;transform:translateY(0)}}
@keyframes fadeLeft{0%{opacity:0;transform:translateX(-30px)}100%{opacity:1;transform:translateX(0)}}
@keyframes fadeRight{0%{opacity:0;transform:translateX(30px)}100%{opacity:1;transform:translateX(0)}}
@keyframes fadeScale{0%{opacity:0;transform:scale(.85)}100%{opacity:1;transform:scale(1)}}
@keyframes shimmer{0%{background-position:-200% 0}100%{background-position:200% 0}}

/* Section titles */
.sec-title{animation:fadeUp .7s cubic-bezier(.23,1,.32,1) both}
.sec-sub{animation:fadeUp .7s .1s cubic-bezier(.23,1,.32,1) both}
.bar{animation:barGrow .8s cubic-bezier(.23,1,.32,1) both}
@keyframes barGrow{0%{width:0;opacity:0}100%{width:70px;opacity:1}}

/* Cards - stagger entrance via IntersectionObserver */
.card{transition:transform .45s cubic-bezier(.23,1,.32,1),background .35s,box-shadow .45s}
.card:hover{transform:translateY(-8px) scale(1.02)!important;box-shadow:0 24px 60px rgba(0,0,0,.35)}
.card::after{transition:height .3s}
.card:hover::after{height:4px}

/* Timeline items */
.tl-i{transition:transform .4s cubic-bezier(.23,1,.32,1),box-shadow .4s}
.tl-i:hover{box-shadow:0 8px 30px rgba(0,210,255,.08)}
.tl-i::before{transition:all .3s cubic-bezier(.23,1,.32,1)}
.tl-i:hover::before{transform:scale(1.4)}
.tl-img{transition:transform .4s cubic-bezier(.23,1,.32,1),box-shadow .3s}
.tl-i:hover .tl-img{transform:scale(1.08);box-shadow:0 8px 24px rgba(0,0,0,.2)}

/* Branch nodes */
.b-node{transition:transform .45s cubic-bezier(.23,1,.32,1),box-shadow .45s,border-color .3s}
.b-node:hover{transform:translateY(-6px) scale(1.04);box-shadow:0 20px 48px rgba(0,0,0,.35)}
.b-arrow{animation:arrowPulse 2s ease-in-out infinite}
@keyframes arrowPulse{0%,100%{opacity:.4;transform:translateY(0)}50%{opacity:.8;transform:translateY(3px)}}
.b-level-label{animation:fadeUp .5s cubic-bezier(.23,1,.32,1) both}

/* LLM section */
.llm-section{transition:transform .4s cubic-bezier(.23,1,.32,1),box-shadow .4s}
.llm-section:hover{transform:translateY(-4px);box-shadow:0 16px 40px rgba(0,0,0,.25)}
.llm-p-item{transition:background .3s,padding-left .3s}
.llm-p-item:hover{background:rgba(255,255,255,.03);padding-left:6px}
.llm-badge{transition:transform .2s,box-shadow .2s}
.llm-p-item:hover .llm-badge{transform:scale(1.1);box-shadow:0 2px 8px rgba(0,0,0,.2)}

/* Token demo */
.tk{transition:transform .3s cubic-bezier(.23,1,.32,1),box-shadow .3s}
.tk:hover{transform:scale(1.18) translateY(-6px)!important;box-shadow:0 12px 28px rgba(0,0,0,.3)}
.tk{animation:tkFloat 3s ease-in-out infinite}
.tk:nth-child(2){animation-delay:.4s}
.tk:nth-child(3){animation-delay:.8s}
.tk:nth-child(4){animation-delay:1.2s}
@keyframes tkFloat{0%,100%{transform:translateY(0)}50%{transform:translateY(-4px)}}

/* Phone simulator */
.phone{transition:transform .4s cubic-bezier(.23,1,.32,1),box-shadow .4s}
.phone:hover{transform:translateY(-4px);box-shadow:0 28px 70px rgba(0,0,0,.55)}
.step-card{transition:opacity .5s,transform .5s cubic-bezier(.23,1,.32,1),border-color .3s,box-shadow .3s}
.step-card.active{box-shadow:0 4px 20px rgba(0,0,0,.15)}

/* Concept cards */
.concept-card{transition:transform .45s cubic-bezier(.23,1,.32,1),box-shadow .4s,border-color .3s}
.concept-card:hover{transform:translateY(-6px) scale(1.03);box-shadow:0 18px 44px rgba(0,0,0,.3)}
.concept-connector{animation:connectorPulse 2.5s ease-in-out infinite}
@keyframes connectorPulse{0%,100%{opacity:.25}50%{opacity:.6}}

/* App & challenge cards */
.ac-card{transition:transform .45s cubic-bezier(.23,1,.32,1),box-shadow .4s,border-color .3s}
.ac-card:hover{transform:translateY(-6px) scale(1.02);box-shadow:0 20px 48px rgba(0,0,0,.3)}
.ac-ic{transition:transform .3s}
.ac-card:hover .ac-ic{transform:scale(1.2) rotate(5deg)}

/* Summary section */
.summary-item{transition:transform .4s cubic-bezier(.23,1,.32,1),border-color .3s,box-shadow .4s}
.summary-item:hover{transform:translateY(-6px) scale(1.04);box-shadow:0 16px 36px rgba(0,0,0,.25)}

/* Floating particles for hero */
.hero-particle{position:absolute;border-radius:50%;pointer-events:none;animation:particleDrift linear infinite}
@keyframes particleDrift{0%{transform:translateY(0) translateX(0) scale(1);opacity:.6}50%{opacity:1}100%{transform:translateY(-100vh) translateX(30px) scale(.3);opacity:0}}

/* Nav link underline effect */
nav a{position:relative;overflow:hidden}
nav a::after{content:'';position:absolute;bottom:2px;left:50%;width:0;height:2px;background:var(--accent);transition:width .3s,left .3s;border-radius:1px}
nav a:hover::after,nav a.active::after{width:60%;left:20%}

/* Glow pulse on important elements */
@keyframes glowPulse{0%,100%{box-shadow:0 0 8px rgba(0,210,255,.15)}50%{box-shadow:0 0 20px rgba(0,210,255,.3)}}
.token-demo{animation:glowPulse 4s ease-in-out infinite}

/* Typing cursor for hero */
.type-cursor::after{content:'|';animation:blink 1s step-end infinite;color:var(--accent)}
@keyframes blink{0%,100%{opacity:1}50%{opacity:0}}
.scroll-hint{position:absolute;bottom:30px;left:50%;transform:translateX(-50%);color:var(--gray);font-size:15px;animation:bo 2s infinite}
@keyframes bo{0%,100%{transform:translateX(-50%) translateY(0)}50%{transform:translateX(-50%) translateY(10px)}}
.tl{position:relative;max-width:950px}
.tl::before{content:'';position:absolute;left:24px;top:0;bottom:0;width:3px;background:linear-gradient(180deg,var(--accent),var(--accent2),var(--pink),var(--yellow));border-radius:2px}
.tl-i{position:relative;margin-bottom:24px;margin-left:56px;display:flex;gap:18px;cursor:default;transition:transform .4s cubic-bezier(.23,1,.32,1)}
.tl-i:hover{transform:translateX(4px)}
.tl-i::before{content:'';position:absolute;left:-44px;top:24px;width:16px;height:16px;border-radius:50%;border:3px solid var(--accent);background:var(--bg);transition:.3s;z-index:2}
.tl-i:hover::before{background:var(--accent);box-shadow:0 0 24px rgba(0,210,255,.5)}
.tl-text{flex:1;padding:20px 24px;background:var(--card);border-radius:var(--radius);border:1px solid rgba(255,255,255,.05);position:relative;transition:background .3s}
.tl-text:hover{background:var(--card-h)}
.tl-y{font-size:28px;font-weight:900;color:var(--accent)}
.tl-t{font-size:19px;font-weight:700;margin-top:4px}
.tl-d{font-size:15px;color:var(--gray);margin-top:4px}
.tl-img{width:200px;min-height:130px;border-radius:14px;flex-shrink:0;background:linear-gradient(135deg,rgba(0,210,255,.06),rgba(123,97,255,.06));display:flex;flex-direction:column;align-items:center;justify-content:center;font-size:52px;border:1px solid rgba(255,255,255,.03);position:relative;overflow:hidden}
.tl-img-label{font-size:12px;color:var(--gray);margin-top:8px;letter-spacing:1px}
.tl-img::after{content:'';position:absolute;inset:0;background:radial-gradient(circle at 50% 30%,rgba(0,210,255,.08),transparent 70%);pointer-events:none}
.tl-text .ov{position:absolute;inset:0;background:rgba(15,21,38,.96);border-radius:var(--radius);padding:24px;display:flex;flex-direction:column;justify-content:center;opacity:0;transform:translateY(4px);pointer-events:none;transition:opacity .35s,transform .4s cubic-bezier(.23,1,.32,1);z-index:3}
.tl-text:hover .ov{opacity:1;transform:translateY(0);pointer-events:auto}
.branch-wrap{display:flex;flex-direction:column;align-items:center;gap:6px;max-width:960px;margin:0 auto}
.b-level{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;width:100%}
.b-level-label{font-size:12px;color:var(--muted);text-transform:uppercase;letter-spacing:2px;text-align:center;margin:14px 0 6px}
.b-node{background:var(--card);border-radius:var(--radius);padding:22px;width:240px;border:1px solid rgba(255,255,255,.06);text-align:center;cursor:default;transition:transform .4s cubic-bezier(.23,1,.32,1),box-shadow .4s;position:relative;overflow:hidden}
.b-node:hover{transform:translateY(-4px) scale(1.02);box-shadow:0 16px 40px rgba(0,0,0,.3)}
.b-node .bn-ic{font-size:36px;margin-bottom:6px}
.b-node .bn-t{font-size:18px;font-weight:800;margin-bottom:4px}
.b-node .bn-d{font-size:13px;color:var(--gray)}
.b-node .bn-sub{font-size:11px;color:var(--muted);margin-top:4px}
.b-node .bn-ov{position:absolute;inset:0;background:rgba(15,21,38,.96);border-radius:var(--radius);padding:18px;display:flex;flex-direction:column;justify-content:center;opacity:0;transform:translateY(4px);pointer-events:none;transition:opacity .3s,transform .4s cubic-bezier(.23,1,.32,1)}
.b-node:hover .bn-ov{opacity:1;transform:translateY(0);pointer-events:auto}
.b-arrow{text-align:center;color:var(--accent);font-size:15px;opacity:.5;padding:2px 0;font-weight:600}
.llm-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
@media(max-width:900px){div[style*="grid-template-columns:1fr 1fr 1fr 1fr"]{grid-template-columns:1fr 1fr!important}}
@media(max-width:600px){div[style*="grid-template-columns:1fr 1fr 1fr 1fr"]{grid-template-columns:1fr!important}}
.llm-section{background:var(--card);border-radius:var(--radius);padding:20px;border:1px solid rgba(255,255,255,.05)}
.llm-section-title{font-size:16px;font-weight:800;margin-bottom:10px}
.llm-main{grid-column:span 2;position:relative;overflow:hidden}
.llm-main::before{content:'';position:absolute;top:0;left:0;right:0;height:4px;background:linear-gradient(90deg,var(--accent),var(--accent2),var(--pink))}
.llm-p-item{display:flex;align-items:center;gap:8px;padding:7px 0;border-bottom:1px solid rgba(255,255,255,.04)}
.llm-p-item:last-child{border:none}
.llm-p-dot{width:10px;height:10px;border-radius:50%;flex-shrink:0}
.llm-p-name{font-size:14px;font-weight:700}
.llm-p-desc{font-size:11px;color:var(--gray)}
.llm-badge{display:inline-block;font-size:9px;padding:1px 5px;border-radius:6px;font-weight:700;margin-left:3px;vertical-align:middle}
.badge-cn{background:rgba(0,230,150,.15);color:var(--green);border:1px solid rgba(0,230,150,.2)}
.badge-us{background:rgba(0,210,255,.15);color:var(--accent);border:1px solid rgba(0,210,255,.2)}
.ab-grid{display:grid;grid-template-columns:1fr 1fr 1fr;gap:8px}
.ab-item{background:rgba(255,255,255,.03);border-radius:12px;padding:12px 8px;text-align:center;font-size:14px;transition:background .3s,transform .3s}
.ab-item:hover{background:rgba(255,255,255,.07);transform:scale(1.05)}
.token-demo{background:var(--card);border-radius:var(--radius);padding:36px;margin:28px 0}
.td-label{color:var(--accent);font-weight:700;font-size:18px;margin-bottom:16px}
.token-row{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:20px}
.tk{padding:10px 20px;border-radius:10px;font-size:24px;cursor:pointer;position:relative;transition:transform .3s cubic-bezier(.23,1,.32,1),box-shadow .3s}
.tk:hover{transform:scale(1.15) translateY(-4px);box-shadow:0 8px 20px rgba(0,0,0,.25)}
.tk .tt{position:absolute;bottom:calc(100% + 10px);left:50%;transform:translateX(-50%) translateY(6px);background:#1c2848;padding:10px 16px;border-radius:10px;font-size:14px;white-space:nowrap;color:#bbc;opacity:0;pointer-events:none;transition:opacity .25s,transform .3s cubic-bezier(.23,1,.32,1);box-shadow:0 6px 18px rgba(0,0,0,.3)}
.tk .tt::after{content:'';position:absolute;top:100%;left:50%;transform:translateX(-50%);border:6px solid transparent;border-top-color:#1c2848}
.tk:hover .tt{opacity:1;transform:translateX(-50%) translateY(0)}
.tk1{background:rgba(0,210,255,.15);border:1px solid rgba(0,210,255,.35)}
.tk2{background:rgba(123,97,255,.15);border:1px solid rgba(123,97,255,.35)}
.tk3{background:rgba(0,230,150,.15);border:1px solid rgba(0,230,150,.35)}
.tk4{background:rgba(255,140,0,.15);border:1px solid rgba(255,140,0,.35)}
.phone-wrap{display:flex;gap:48px;align-items:flex-start;flex-wrap:wrap;justify-content:center;margin-top:32px}
.phone{width:390px;background:#111;border-radius:36px;border:3px solid #333;padding:12px;flex-shrink:0;box-shadow:0 20px 60px rgba(0,0,0,.5)}
.phone-notch{width:120px;height:24px;background:#111;border-radius:0 0 14px 14px;margin:0 auto 8px}
.phone-screen{background:#0a0a18;border-radius:24px;height:600px;display:flex;flex-direction:column;overflow:hidden}
.phone-header{background:linear-gradient(135deg,rgba(0,210,255,.1),rgba(123,97,255,.1));padding:14px 18px;display:flex;align-items:center;gap:10px;border-bottom:1px solid rgba(255,255,255,.06)}
.ph-av{width:34px;height:34px;border-radius:50%;background:linear-gradient(135deg,var(--accent),var(--accent2));display:flex;align-items:center;justify-content:center;font-size:17px}
.ph-name{font-size:15px;font-weight:700}
.ph-status{font-size:11px;color:var(--green)}
.phone-msgs{flex:1;overflow-y:auto;padding:14px;display:flex;flex-direction:column;gap:10px;scrollbar-width:none}
.phone-msgs::-webkit-scrollbar{display:none}
.pmsg{max-width:85%;padding:12px 16px;border-radius:16px;font-size:14px;line-height:1.6;opacity:0;transform:translateY(10px);transition:opacity .5s ease,transform .5s cubic-bezier(.23,1,.32,1)}
.pmsg.show{opacity:1;transform:translateY(0)}
.pmsg-user{align-self:flex-end;background:linear-gradient(135deg,rgba(0,210,255,.2),rgba(123,97,255,.2));border:1px solid rgba(0,210,255,.15);border-bottom-right-radius:4px}
.pmsg-sys{align-self:flex-start;background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.06);border-bottom-left-radius:4px;font-size:12px;color:var(--gray)}
.pmsg-ai{align-self:flex-start;background:linear-gradient(135deg,rgba(0,230,150,.12),rgba(0,210,255,.12));border:1px solid rgba(0,230,150,.15);border-bottom-left-radius:4px}
.pmsg-action{display:inline-block;margin-top:8px;padding:6px 14px;border-radius:10px;font-size:12px;font-weight:700;cursor:pointer;transition:transform .2s,background .2s;background:rgba(0,210,255,.12);border:1px solid rgba(0,210,255,.25);color:var(--accent)}
.pmsg-action:hover{background:rgba(0,210,255,.2);transform:scale(1.05)}
.phone-input{display:flex;gap:8px;padding:10px 14px;border-top:1px solid rgba(255,255,255,.06)}
.phone-input input{flex:1;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.08);border-radius:20px;padding:8px 16px;color:var(--white);font-size:14px;font-family:inherit;outline:none}
.phone-input input::placeholder{color:var(--muted)}
.phone-input button{background:linear-gradient(135deg,var(--accent),var(--accent2));border:none;border-radius:20px;padding:8px 18px;color:#fff;font-size:14px;font-weight:700;cursor:pointer;font-family:inherit;transition:transform .2s,opacity .2s}
.phone-input button:hover{transform:scale(1.05)}
.phone-input button:disabled{opacity:.5;cursor:not-allowed;transform:none}
.step-explainer{flex:1;min-width:280px;max-width:500px}
.step-card{background:var(--card);border-radius:var(--radius);padding:18px 22px;margin-bottom:10px;border-left:3px solid var(--muted);opacity:.3;transform:translateX(-10px);transition:opacity .5s,transform .5s cubic-bezier(.23,1,.32,1),border-color .3s}
.step-card.active{opacity:1;transform:translateX(0)}
.sc-step{font-size:11px;font-weight:700;letter-spacing:1px;margin-bottom:4px}
.sc-title{font-size:16px;font-weight:700;margin-bottom:3px}
.sc-desc{font-size:13px;color:var(--gray);line-height:1.5}
.sc1.active{border-color:var(--accent)}.sc1 .sc-step{color:var(--accent)}
.sc2.active{border-color:var(--orange)}.sc2 .sc-step{color:var(--orange)}
.sc3.active{border-color:var(--accent2)}.sc3 .sc-step{color:var(--accent2)}
.sc4.active{border-color:var(--pink)}.sc4 .sc-step{color:var(--pink)}
.sc5.active{border-color:var(--green)}.sc5 .sc-step{color:var(--green)}
.concept-graph{display:flex;flex-direction:column;align-items:center;gap:0;max-width:900px;margin:0 auto}
.concept-row{display:flex;gap:20px;justify-content:center;flex-wrap:wrap}
.concept-card{background:var(--card);border-radius:var(--radius);padding:24px;width:250px;border:1px solid rgba(255,255,255,.06);text-align:center;cursor:default;transition:transform .4s cubic-bezier(.23,1,.32,1),box-shadow .4s;position:relative;overflow:hidden}
.concept-card:hover{transform:translateY(-4px);box-shadow:0 12px 32px rgba(0,0,0,.3)}
.cc-ic{font-size:36px;margin-bottom:8px}
.cc-t{font-size:18px;font-weight:700;margin-bottom:4px}
.cc-d{font-size:13px;color:var(--gray)}
.cc-ov{position:absolute;inset:0;background:rgba(15,21,38,.96);border-radius:var(--radius);padding:20px;display:flex;flex-direction:column;justify-content:center;opacity:0;transform:translateY(4px);pointer-events:none;transition:opacity .35s,transform .4s cubic-bezier(.23,1,.32,1)}
.concept-card:hover .cc-ov{opacity:1;transform:translateY(0);pointer-events:auto}
.cc-ov-t{font-size:16px;font-weight:700;margin-bottom:8px}
.cc-ov-d{font-size:13px;color:#a0b4c8;line-height:1.8}
.concept-connector{color:var(--accent);font-size:18px;padding:6px 0;opacity:.35}
.concept-connector-row{display:flex;justify-content:center;gap:80px;padding:2px 0}
.ac-grid{display:grid;grid-template-columns:1fr 1fr 1fr;gap:20px}
.ac-card{background:var(--card);border-radius:var(--radius);padding:28px 24px;border:1px solid rgba(255,255,255,.05);transition:transform .4s cubic-bezier(.23,1,.32,1),box-shadow .4s;cursor:default;position:relative;overflow:hidden}
.ac-card:hover{transform:translateY(-4px);box-shadow:0 16px 40px rgba(0,0,0,.25);border-color:rgba(255,255,255,.1)}
.ac-card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;border-radius:var(--radius) var(--radius) 0 0;opacity:.6}
.ac-card:hover::before{opacity:1}
.ac-ic{font-size:40px;margin-bottom:10px}
.ac-t{font-size:20px;font-weight:800;margin-bottom:6px}
.ac-d{font-size:15px;color:var(--gray);line-height:1.5}
.ac-ov{position:absolute;inset:0;background:rgba(15,21,38,.96);border-radius:var(--radius);padding:28px 24px;display:flex;flex-direction:column;justify-content:center;opacity:0;transform:translateY(4px);pointer-events:none;transition:opacity .35s,transform .4s cubic-bezier(.23,1,.32,1)}
.ac-card:hover .ac-ov{opacity:1;transform:translateY(0);pointer-events:auto}
.ac-ov-t{font-size:18px;font-weight:700;margin-bottom:10px}
.ac-ov-d{font-size:14px;color:#a0b4c8;line-height:1.9}
.summary-wrap{max-width:960px;margin:0 auto}
.summary-hero{text-align:center;padding:64px 48px;position:relative;overflow:hidden;border-radius:var(--radius);margin-bottom:36px;background:linear-gradient(135deg,rgba(0,210,255,.08),rgba(123,97,255,.08),rgba(255,77,141,.08),rgba(255,214,0,.08));border:1px solid rgba(255,255,255,.06);animation:heroGlow 6s ease-in-out infinite alternate}
@keyframes heroGlow{0%{box-shadow:0 0 40px rgba(0,210,255,.08),0 0 80px rgba(123,97,255,.04)}100%{box-shadow:0 0 60px rgba(255,77,141,.1),0 0 100px rgba(255,214,0,.05)}}
.summary-hero::before{content:'';position:absolute;inset:0;background:radial-gradient(ellipse at 20% 50%,rgba(0,210,255,.1),transparent 50%),radial-gradient(ellipse at 80% 50%,rgba(123,97,255,.1),transparent 50%),radial-gradient(ellipse at 50% 80%,rgba(255,77,141,.06),transparent 50%)}
.sh-icon{font-size:64px;margin-bottom:20px;animation:floatIcon 4s ease-in-out infinite;position:relative}
@keyframes floatIcon{0%,100%{transform:translateY(0) rotate(0deg)}25%{transform:translateY(-8px) rotate(2deg)}75%{transform:translateY(4px) rotate(-1deg)}}
.sh-quote{font-size:34px;font-weight:900;line-height:1.5;position:relative;background:linear-gradient(135deg,var(--yellow),var(--orange),var(--pink),var(--accent));background-size:200% 200%;-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;animation:gradShift 4s ease-in-out infinite}
@keyframes gradShift{0%,100%{background-position:0% 50%}50%{background-position:100% 50%}}
.sh-sub{font-size:16px;color:var(--gray);margin-top:16px;position:relative}
.summary-grid{display:grid;grid-template-columns:1fr 1fr 1fr;gap:16px;margin-top:28px}
.summary-item{padding:24px;background:var(--card);border-radius:var(--radius);border:1px solid rgba(255,255,255,.04);transition:transform .4s cubic-bezier(.23,1,.32,1),border-color .3s,box-shadow .4s;text-align:center}
.summary-item:hover{transform:translateY(-4px) scale(1.02);border-color:rgba(255,255,255,.12);box-shadow:0 12px 30px rgba(0,0,0,.2)}
.si-ic{font-size:28px;margin-bottom:8px}
.si-num{font-size:42px;font-weight:900;margin-bottom:8px;opacity:.7;line-height:1}
.si-text{font-size:16px;line-height:1.5}
.summary-cta{text-align:center;padding:48px 0 24px}
.cta-text{font-size:28px;font-weight:900;margin-bottom:20px;background:linear-gradient(135deg,var(--accent),var(--accent2),var(--pink));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.cta-links{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.cta-btn{display:inline-block;padding:12px 28px;border:2px solid;border-radius:14px;font-size:16px;font-weight:700;text-decoration:none;transition:transform .3s,box-shadow .3s,background .3s}
.cta-btn:hover{transform:translateY(-3px) scale(1.05);box-shadow:0 8px 24px rgba(0,0,0,.3)}
.cta-btn:first-child:hover{background:rgba(0,210,255,.1)}
.cta-btn:nth-child(2):hover{background:rgba(0,230,150,.1)}
.cta-btn:nth-child(3):hover{background:rgba(123,97,255,.1)}
.summary-footer{text-align:center;padding:48px 0;color:var(--gray);font-size:16px}
.sf-line{width:80px;height:2px;background:linear-gradient(90deg,var(--accent),var(--accent2));margin:0 auto 24px;border-radius:1px}
.dots-bg{position:fixed;inset:0;pointer-events:none;z-index:-1;overflow:hidden}
.dot{position:absolute;border-radius:50%;background:rgba(0,210,255,.02);animation:drift linear infinite}
@keyframes drift{0%{transform:translateY(0)}100%{transform:translateY(-100vh)}}
@media(max-width:768px){.sec{padding:80px 20px 50px}#hero h1{font-size:44px}.sec-title{font-size:30px}.llm-grid,.summary-grid,.ac-grid{grid-template-columns:1fr}.phone-wrap{flex-direction:column;align-items:center}.step-explainer{min-width:auto;width:100%}.b-node{width:160px;padding:14px}.tl-img{display:none}}