*{margin:0;padding:0;box-sizing:border-box}

:root{
    --bg:#f5f5f7;--bg2:#ffffff;--bg3:#f0f0f3;
    --accent:#333;--accent2:#666;
    --accent-glow:rgba(0,0,0,.08);
    --text:#1d1d1f;--text2:#86868b;
    --green:#34c759;
    --border:rgba(0,0,0,.08);
    --radius:12px;
    --nav-bg:rgba(245,245,247,.85);
    --shadow:0 2px 12px rgba(0,0,0,.06);
    --shadow-hover:0 8px 30px rgba(0,0,0,.1);
    --grid-color:rgba(0,0,0,.03);
    --glow-opacity:.06;
}

[data-theme="dark"]{
    --bg:#0a0a0f;--bg2:#12121a;--bg3:#1a1a25;
    --accent:#6c5ce7;--accent2:#a29bfe;
    --accent-glow:rgba(108,92,231,.3);
    --text:#e8e8f0;--text2:#8888a0;
    --green:#00b894;
    --border:rgba(255,255,255,.06);
    --nav-bg:rgba(10,10,15,.85);
    --shadow:0 2px 12px rgba(0,0,0,.3);
    --shadow-hover:0 8px 30px rgba(0,0,0,.4);
    --grid-color:rgba(108,92,231,.03);
    --glow-opacity:.15;
}

body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI','PingFang SC','Microsoft YaHei',sans-serif;background:var(--bg);color:var(--text);line-height:1.6;overflow-x:hidden;transition:background .4s,color .4s}

/* ====== BG ====== */
.bg-grid{position:fixed;inset:0;background-image:linear-gradient(var(--grid-color) 1px,transparent 1px),linear-gradient(90deg,var(--grid-color) 1px,transparent 1px);background-size:60px 60px;pointer-events:none;z-index:0;transition:background-image .4s}
.bg-glow{position:fixed;width:600px;height:600px;border-radius:50%;filter:blur(120px);opacity:var(--glow-opacity);pointer-events:none;z-index:0;transition:opacity .4s}
.bg-glow.g1{top:-200px;left:-100px;background:#c8c8d0}
.bg-glow.g2{bottom:-200px;right:-100px;background:#e0e0e8}
[data-theme="dark"] .bg-glow.g1{background:var(--accent)}
[data-theme="dark"] .bg-glow.g2{background:#e84393}

/* ====== NAV ====== */
nav{position:fixed;top:0;width:100%;z-index:100;padding:16px 40px;display:flex;justify-content:space-between;align-items:center;backdrop-filter:blur(20px);background:var(--nav-bg);border-bottom:1px solid var(--border);transition:background .4s,border-color .4s}
.nav-logo{font-size:1.3rem;font-weight:800;letter-spacing:2px;color:var(--text);transition:color .4s}
.nav-right{display:flex;align-items:center;gap:28px}
.nav-links{display:flex;gap:32px;list-style:none}
.nav-links a{color:var(--text2);text-decoration:none;font-size:.9rem;font-weight:500;transition:color .3s;position:relative}
.nav-links a:hover{color:var(--text)}
.nav-links a::after{content:'';position:absolute;bottom:-4px;left:0;width:0;height:2px;background:var(--accent);transition:width .3s}
.nav-links a:hover::after{width:100%}

/* ====== THEME TOGGLE ====== */
.theme-toggle{width:40px;height:22px;border-radius:11px;background:var(--bg3);border:1px solid var(--border);cursor:pointer;position:relative;transition:all .3s;flex-shrink:0}
.theme-toggle::after{content:'';position:absolute;top:2px;left:2px;width:16px;height:16px;border-radius:50%;background:var(--text2);transition:all .3s}
[data-theme="dark"] .theme-toggle{background:var(--accent);border-color:var(--accent)}
[data-theme="dark"] .theme-toggle::after{left:20px;background:#fff}
.theme-toggle:hover{box-shadow:var(--shadow)}

/* ====== HERO ====== */
.hero{min-height:100vh;display:flex;flex-direction:column;justify-content:flex-start;align-items:center;text-align:center;padding:160px 20px 80px;position:relative;z-index:1}
.hero-badge{display:inline-flex;align-items:center;gap:8px;padding:6px 16px;border-radius:20px;border:1px solid var(--border);background:var(--bg2);font-size:.8rem;color:var(--text2);margin-bottom:32px;opacity:0;animation:fadeInUp .8s .2s forwards;transition:background .4s,border-color .4s}
.hero-badge .dot{width:8px;height:8px;border-radius:50%;background:var(--green);animation:pulse 2s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.4}}
.typewriter-container{font-size:clamp(2.5rem,7vw,5rem);font-weight:900;letter-spacing:3px;margin-bottom:24px;min-height:1.2em}
.typewriter{color:var(--text);border-right:3px solid var(--accent);padding-right:4px;animation:twBlink .8s infinite;transition:color .4s}
@keyframes twBlink{0%,100%{border-color:var(--accent)}50%{border-color:transparent}}
.typewriter.done{border-color:transparent;animation:none}
.subtitle{font-size:clamp(1.1rem,2.5vw,1.5rem);color:var(--text2);margin-bottom:48px;opacity:0;transition:opacity 1s,transform 1s,color .4s;transform:translateY(20px)}
.subtitle.visible{opacity:1;transform:translateY(0)}
.hero-cta{display:flex;gap:16px;opacity:0;animation:fadeInUp .8s 2.8s forwards}

/* ====== BUTTONS ====== */
.btn{padding:14px 32px;border-radius:8px;font-size:1rem;font-weight:600;text-decoration:none;transition:all .3s;cursor:pointer;border:none}
.btn-primary{background:var(--text);color:var(--bg);box-shadow:var(--shadow)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover)}
[data-theme="dark"] .btn-primary{background:linear-gradient(135deg,var(--accent),#8b7cf7);color:#fff;box-shadow:0 4px 20px var(--accent-glow)}
.btn-outline{background:transparent;color:var(--text);border:1px solid var(--border)}
.btn-outline:hover{background:var(--bg3);border-color:var(--text2)}

/* ====== SECTIONS ====== */
section{position:relative;z-index:1;padding:100px 20px;max-width:1200px;margin:0 auto}
.section-label{font-size:.75rem;text-transform:uppercase;letter-spacing:4px;color:var(--text2);margin-bottom:12px}
.section-title{font-size:clamp(1.8rem,4vw,2.8rem);font-weight:800;margin-bottom:16px}
.section-desc{color:var(--text2);font-size:1.05rem;max-width:600px;margin-bottom:48px}

/* ====== ADVANTAGES ====== */
.advantages{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:24px}
.adv-card{background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius);padding:36px;transition:all .4s;position:relative;overflow:hidden;box-shadow:var(--shadow)}
.adv-card::before{content:'';position:absolute;top:0;left:0;right:0;height:2px;background:var(--accent);opacity:0;transition:opacity .4s}
.adv-card:hover{border-color:var(--accent);transform:translateY(-4px);box-shadow:var(--shadow-hover)}
.adv-card:hover::before{opacity:1}
.adv-icon{font-size:2rem;margin-bottom:16px;display:block}
.adv-card h3{font-size:1.2rem;margin-bottom:8px;font-weight:700}
.adv-card p{color:var(--text2);font-size:.95rem}

/* ====== FEATURES ====== */
.features-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:16px}
.feature-card{background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius);padding:24px;transition:all .3s;cursor:default}
.feature-card:hover{border-color:var(--accent);background:var(--bg3)}
.feature-header{display:flex;align-items:center;gap:8px;margin-bottom:8px;flex-wrap:wrap}
.feature-header h4{font-size:1.05rem;font-weight:700}
.feature-desc{color:var(--text2);font-size:.85rem;line-height:1.5;margin-bottom:4px}
.feature-tag{display:inline-block;margin-top:12px;padding:2px 10px;border-radius:10px;font-size:.7rem;text-transform:uppercase;letter-spacing:1px;border:1px solid var(--border);color:var(--text2)}
.feature-settings{margin-top:10px;padding-top:10px;border-top:1px solid var(--border)}
.mini-slider,.mini-toggle,.mini-btn-group{display:flex;justify-content:space-between;align-items:center;padding:4px 0;font-size:.78rem}
.mini-label{color:var(--text2)}
.mini-range{color:var(--accent2);font-weight:600;font-size:.72rem}
.mini-btn{color:var(--accent2);font-size:.72rem}
.mini-opts{color:var(--accent2);font-size:.72rem}
.more-link{display:inline-flex;align-items:center;gap:8px;margin-top:32px;color:var(--accent);text-decoration:none;font-weight:600;font-size:.95rem;transition:gap .3s}
.more-link:hover{gap:14px}
.more-link .arrow{transition:transform .3s}
.more-link:hover .arrow{transform:translateX(4px)}

/* ====== CATEGORY ====== */
.feature-category{margin-bottom:48px}
.category-title{font-size:1.3rem;font-weight:800;margin-bottom:20px;padding-bottom:8px;border-bottom:1px solid var(--border);display:flex;align-items:center;gap:10px}
.category-count{font-size:.7rem;background:var(--accent);color:#fff;padding:2px 8px;border-radius:10px;font-weight:700}
.stats-bar{display:flex;gap:40px;justify-content:center;margin:40px 0;flex-wrap:wrap}
.stat-item{text-align:center}
.stat-num{font-size:2rem;font-weight:900;color:var(--text)}
.stat-label{font-size:.8rem;color:var(--text2);margin-top:4px}

/* ====== PRICING ====== */
.pricing-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:24px}
.price-card{background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius);padding:40px 32px;text-align:center;transition:all .4s;position:relative;box-shadow:var(--shadow)}
.price-card.featured{border-color:var(--accent);box-shadow:0 0 40px var(--accent-glow)}
.price-card.featured::after{content:'推荐';position:absolute;top:-12px;left:50%;transform:translateX(-50%);padding:4px 16px;background:var(--accent);color:#fff;font-size:.75rem;font-weight:700;border-radius:12px}
.price-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
.price-name{font-size:1.1rem;font-weight:700;margin-bottom:8px}
.price-period{color:var(--text2);font-size:.85rem;margin-bottom:24px}
.price-amount{font-size:2.8rem;font-weight:900;margin-bottom:4px}
.price-amount span{font-size:1rem;font-weight:500;color:var(--text2)}
.price-features{list-style:none;text-align:left;margin:24px 0;padding:0}
.price-features li{padding:8px 0;font-size:.9rem;color:var(--text2);display:flex;align-items:center;gap:8px}
.price-features li::before{content:'✓';color:var(--green);font-weight:700}
.price-card .btn{width:100%;text-align:center;display:block}

/* ====== FOOTER ====== */
footer{position:relative;z-index:1;border-top:1px solid var(--border);padding:40px 20px;text-align:center}
.footer-brand{font-size:1.1rem;font-weight:800;color:var(--text);margin-bottom:8px;transition:color .4s}
.footer-copy{color:var(--text2);font-size:.8rem}

/* ====== SCROLL TYPEWRITER ====== */
[data-typewriter]{visibility:hidden;min-height:1.2em}
.tw-cursor{border-right:3px solid var(--accent);padding-right:4px;animation:twBlink .8s infinite}
.tw-cursor.done{border-color:transparent;animation:none}
.tw-cursor-sm{border-right-width:2px}

/* ====== ANIMATIONS ====== */
@keyframes fadeInUp{from{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}
.reveal{opacity:0;transform:translateY(30px);transition:opacity .8s,transform .8s}
.reveal.visible{opacity:1;transform:translateY(0)}

/* ====== PARTICLES ====== */
.particle{position:fixed;width:2px;height:2px;background:var(--text2);border-radius:50%;pointer-events:none;z-index:0;opacity:.15;animation:float linear infinite}
@keyframes float{0%{transform:translateY(100vh) scale(0);opacity:0}10%{opacity:.15}90%{opacity:.15}100%{transform:translateY(-10vh) scale(1);opacity:0}}

/* ====== RESPONSIVE ====== */
@media(max-width:768px){
    nav{padding:14px 20px}
    .nav-links{gap:20px}
    .nav-links a{font-size:.8rem}
    .nav-right{gap:16px}
    section{padding:60px 16px}
    .hero-cta{flex-direction:column;width:100%;max-width:280px}
    .btn{text-align:center}
}

/* ====== SHOWCASE CAROUSEL ====== */
.carousel{position:relative;margin-top:24px;border-radius:16px;overflow:hidden;box-shadow:var(--shadow-hover)}
.carousel-track{display:flex;transition:transform .6s cubic-bezier(.25,.8,.25,1);will-change:transform}
.carousel-slide{min-width:100%;aspect-ratio:16/7;position:relative;overflow:hidden}
.slide-visual{width:100%;height:100%;display:flex;align-items:center;justify-content:center;padding:40px;position:relative;overflow:hidden}
.slide-visual::before{content:'';position:absolute;inset:0;background:radial-gradient(circle at 70% 30%,rgba(255,255,255,.1),transparent 60%)}
.slide-content{position:relative;z-index:1;color:#fff;text-align:center;max-width:600px}
.slide-badge{display:inline-block;padding:4px 14px;border-radius:20px;background:rgba(255,255,255,.15);backdrop-filter:blur(8px);font-size:.75rem;font-weight:600;letter-spacing:2px;margin-bottom:16px}
.slide-content h3{font-size:clamp(1.4rem,3vw,2rem);font-weight:800;margin-bottom:10px}
.slide-content p{font-size:.9rem;opacity:.8;line-height:1.6}
.slide-fake-ui{display:flex;gap:8px;justify-content:center;margin-top:20px;flex-wrap:wrap}
.fake-btn{padding:6px 16px;border-radius:6px;background:rgba(255,255,255,.1);backdrop-filter:blur(4px);font-size:.75rem;font-weight:600;border:1px solid rgba(255,255,255,.15);transition:all .3s}
.fake-btn.active{background:rgba(255,255,255,.25);border-color:rgba(255,255,255,.4)}

.carousel-controls{display:flex;align-items:center;justify-content:center;gap:16px;padding:16px;background:var(--bg2);border-top:1px solid var(--border)}
.carousel-btn{width:36px;height:36px;border-radius:50%;border:1px solid var(--border);background:var(--bg);color:var(--text);font-size:1.2rem;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .3s}
.carousel-btn:hover{background:var(--accent);color:#fff;border-color:var(--accent)}
.carousel-dots{display:flex;gap:8px}
.carousel-dot{width:8px;height:8px;border-radius:50%;background:var(--border);cursor:pointer;transition:all .3s}
.carousel-dot.active{background:var(--accent);width:24px;border-radius:4px}

/* 3D tilt on hover */
.carousel-slide:hover .slide-content{transform:perspective(800px) rotateY(-2deg) rotateX(1deg);transition:transform .6s}
.slide-content{transition:transform .6s}

@media(max-width:768px){
    .carousel-slide{aspect-ratio:16/10}
    .slide-visual{padding:24px}
    .slide-content h3{font-size:1.2rem}
}

/* ====== CAROUSEL IMAGE SLIDES ====== */
.slide-img{width:100%;height:100%;object-fit:cover;display:block}

/* ====== PRICING NOTE ====== */
.pricing-note{text-align:left;color:var(--text2);font-size:.1rem;margin-top:12px;opacity:.35}