/* ===== KOS Design System ===== */
:root{
  --brand:#229AF4;--btn-start:#898EFF;--btn-end:#5E7DF9;--blue:#2563eb;--purple:#7c3aed;
  --dark:#0a0f1e;--dark2:#131b34;--dark3:#1a2240;--border:#e5e7eb;
  --title-color:#233863;--subtitle-color:#6D7B96;--body-color:#4A4A4A;
  --bg-white:#ffffff;--bg-alt:#F5F7FA;
  --gradient-btn:linear-gradient(135deg,#898EFF 0%,#5E7DF9 100%);
  --gradient-primary:linear-gradient(135deg,#898EFF 0%,#5E7DF9 50%,#229AF4 100%);
  --shadow-sm:0 1px 2px rgba(35,56,99,.04),0 1px 3px rgba(35,56,99,.06);
  --shadow-md:0 4px 8px rgba(35,56,99,.04),0 8px 24px rgba(35,56,99,.06);
  --shadow-lg:0 12px 24px rgba(35,56,99,.06),0 24px 48px rgba(35,56,99,.08);
  --shadow-xl:0 24px 48px rgba(35,56,99,.08),0 48px 96px rgba(35,56,99,.1);
  --shadow-glow:0 0 40px rgba(94,125,249,.25);
  --radius-sm:6px;--radius-md:10px;--radius-lg:16px;--radius-xl:24px;--radius-2xl:32px;--radius-full:9999px;
  --font-sans:'PingFang SC','Microsoft YaHei',-apple-system,BlinkMacSystemFont,sans-serif;
  --blue:#2563eb;--purple:#7c3aed;--text:#1a1a2e;--text2:#4a5568;--muted:#9ca3af;--border:#e5e7eb;
  --success:#10b981;--warning:#f59e0b;--danger:#ef4444;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--font-sans);color:var(--body-color);background:var(--bg-white);overflow-x:hidden}
a{text-decoration:none;color:inherit}
img{max-width:100%;display:block}

/* ===== NAV (from site) ===== */
.nav-wrap{position:fixed;top:0;left:0;right:0;z-index:1000;background:rgba(255,255,255,.92);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-bottom:1px solid rgba(0,0,0,.05);transition:box-shadow .3s}
.nav-wrap.scrolled{box-shadow:0 1px 16px rgba(0,0,0,.07)}
.nav{max-width:1280px;margin:0 auto;height:68px;display:flex;align-items:center;padding:0 40px}
.logo{display:flex;align-items:center;gap:10px;cursor:pointer;margin-right:48px;flex-shrink:0}
.logo-icon{width:40px;height:40px;border-radius:10px;object-fit:cover;flex-shrink:0;box-shadow:0 4px 12px rgba(37,99,235,.2)}
.logo-text{font-size:20px;font-weight:700;color:var(--text);letter-spacing:.5px}
.logo-text span{color:var(--blue)}
.nav-items{display:flex;align-items:center;gap:2px;flex:1}
.nav-item{position:relative}
.nav-link{display:flex;align-items:center;gap:4px;padding:8px 16px;font-size:15px;color:var(--text2);border-radius:8px;cursor:pointer;transition:all .2s;font-weight:500;white-space:nowrap}
.nav-link:hover{color:var(--blue);background:rgba(37,99,235,.06)}
.nav-link.active{color:var(--blue);font-weight:600}
.nav-link.active::after{content:'';position:absolute;bottom:-22px;left:50%;transform:translateX(-50%);width:24px;height:3px;background:linear-gradient(90deg,var(--blue),var(--purple));border-radius:2px}
.nav-arrow{font-size:9px;transition:transform .25s;margin-top:1px;opacity:.6}
.nav-item:hover .nav-arrow{transform:rotate(180deg);opacity:1}
.dropdown{position:absolute;top:100%;left:50%;transform:translateX(-50%) translateY(-12px);margin-top:10px;background:#fff;border-radius:16px;box-shadow:0 20px 50px rgba(0,0,0,.12),0 8px 20px rgba(0,0,0,.06);border:1px solid rgba(0,0,0,.04);width:620px;padding:0;opacity:0;visibility:hidden;transition:all .3s cubic-bezier(.4,0,.2,1);display:flex;overflow:hidden}
.dropdown::before{content:'';position:absolute;top:-12px;left:0;right:0;height:12px}
.nav-item:hover .dropdown{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0)}
.dropdown-left{width:50%;padding:28px;border-right:1px solid #f0f2f5}
.dropdown-header{font-size:13px;color:var(--muted);margin-bottom:20px;font-weight:500;letter-spacing:.5px}
.product-list{display:flex;flex-direction:column;gap:18px}
.product-item{display:flex;align-items:flex-start;gap:14px;color:var(--text);padding:4px 0;border-radius:8px;transition:all .2s}
.product-item:hover .product-title{color:var(--blue)}
.product-item:hover .product-icon{background:#eff6ff}
.product-icon{width:40px;height:40px;border-radius:10px;background:#f8fafc;display:flex;align-items:center;justify-content:center;flex-shrink:0;transition:background .2s}
.product-icon svg{width:22px;height:22px;stroke:var(--blue);stroke-width:1.8;fill:none;stroke-linecap:round;stroke-linejoin:round}
.product-title{font-size:15px;font-weight:600;color:var(--text);margin-bottom:4px;transition:color .2s}
.product-subtitle{font-size:13px;color:var(--muted);line-height:1.5}
.dropdown-right{width:50%;padding:28px;background:#f8fafc}
.video-section{margin-bottom:26px}
.video-title{font-size:15px;font-weight:600;color:var(--text);margin-bottom:14px}
.video-thumb{width:100%;aspect-ratio:16/9;background:linear-gradient(135deg,#3b82f6,#7c3aed);border-radius:12px;display:flex;align-items:center;justify-content:center;position:relative;cursor:pointer;overflow:hidden;transition:transform .25s,box-shadow .25s}
.video-thumb:hover{transform:translateY(-2px);box-shadow:0 10px 30px rgba(59,130,246,.3)}
.video-thumb::before{content:'';position:absolute;inset:0;background:radial-gradient(circle at 30% 30%,rgba(255,255,255,.2),transparent 60%)}
.video-thumb::after{content:'';position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.08) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.08) 1px,transparent 1px);background-size:24px 24px}
.play-btn{width:48px;height:48px;background:rgba(255,255,255,.95);border-radius:50%;display:flex;align-items:center;justify-content:center;position:relative;z-index:2;box-shadow:0 4px 16px rgba(0,0,0,.15);transition:transform .2s}
.video-thumb:hover .play-btn{transform:scale(1.08)}
.play-btn svg{width:16px;height:16px;fill:#3b82f6;margin-left:2px}
.video-badge{position:absolute;top:10px;right:12px;background:rgba(0,0,0,.35);color:#fff;font-size:11px;padding:3px 8px;border-radius:4px;z-index:2}
.video-label{position:absolute;bottom:10px;left:12px;color:#fff;font-size:12px;z-index:2;text-shadow:0 1px 2px rgba(0,0,0,.2)}
.article-link{display:flex;align-items:center;gap:12px;padding:10px;border-radius:10px;transition:background .2s}
.article-link:hover{background:#fff}
.article-icon{width:40px;height:40px;background:#eff6ff;border-radius:8px;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.article-icon svg{width:20px;height:20px;stroke:var(--blue);stroke-width:1.8;fill:none;stroke-linecap:round;stroke-linejoin:round}
.article-content{flex:1;min-width:0}
.article-title{font-size:14px;color:var(--text);font-weight:500;line-height:1.4;margin-bottom:3px}
.article-meta{font-size:12px;color:var(--muted)}
.nav-right{display:flex;align-items:center;flex-shrink:0}
.nav-cta{padding:10px 26px;background:linear-gradient(135deg,var(--blue),var(--purple));color:#fff;border:none;border-radius:9px;font-size:14px;font-weight:600;cursor:pointer;transition:all .25s;box-shadow:0 4px 14px rgba(37,99,235,0.28);display:inline-block}
.nav-cta:hover{transform:translateY(-1px);box-shadow:0 6px 20px rgba(37,99,235,0.38)}
.nav-phone{display:flex;align-items:center;gap:6px;margin-right:16px;font-size:15px;font-weight:700;color:var(--text);transition:color .2s;white-space:nowrap;cursor:pointer}
.nav-phone svg{width:18px;height:18px;stroke:var(--blue);stroke-width:2;fill:none}
.nav-phone:hover{color:var(--blue)}
.mobile-toggle{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:6px}
.mobile-toggle span{width:22px;height:2px;background:#333;border-radius:2px;transition:all .3s}

/* ===== KOS Section Styles ===== */
.kos-page{font-family:var(--font-sans);color:var(--body-color);background:var(--bg-white);overflow-x:hidden}
.section .container{max-width:1260px;margin:0 auto;padding:0 24px}
.section{padding:88px 0;position:relative}
.section-header{text-align:center;max-width:850px;margin:0 auto 64px}
.section-tag{display:inline-block;font-size:14px;color:var(--blue);font-weight:600;margin-bottom:12px;letter-spacing:1px}
.section-title{font-size:40px;font-weight:600;line-height:1.3;color:var(--title-color);margin-bottom:20px}
.section-desc{font-size:20px;font-weight:400;color:var(--subtitle-color);line-height:1.6}
.gradient-text{background:var(--gradient-primary);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}

/* Buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-size:15px;font-weight:600;border-radius:var(--radius-md);cursor:pointer;transition:all .25s;white-space:nowrap;position:relative;overflow:hidden;padding:12px 24px;border:none;font-family:var(--font-sans)}
.btn-lg{height:52px;padding:0 32px;font-size:16px;border-radius:var(--radius-lg)}
.btn-primary{background:var(--gradient-btn);color:#fff;box-shadow:0 4px 12px rgba(94,125,249,.3)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(94,125,249,.4)}
.btn-outline{background:#fff;color:var(--title-color);border:1.5px solid #E0E4ED}
.btn-outline:hover{border-color:var(--btn-end);color:var(--btn-end);transform:translateY(-2px);box-shadow:var(--shadow-md)}

/* Hero */
.hero{position:relative;display:flex;align-items:flex-start;padding:140px 0 0;overflow:visible;min-height:700px}
.hero-bg{position:absolute;top:0;left:0;right:0;height:900px;z-index:-1;background:#f8f9ff}
.hero-bg::after{content:'';position:absolute;inset:0;background:radial-gradient(circle at 70% 20%,rgba(37,84,254,0.07),transparent 70%),radial-gradient(circle at 20% 80%,rgba(31,255,225,0.05),transparent 70%)}
.hero-content{position:relative;z-index:1;text-align:center;max-width:1260px;margin:0 auto;padding:0 24px}
.hero-badge{display:inline-flex;align-items:center;gap:8px;padding:8px 16px;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.25);border-radius:var(--radius-full);font-size:13px;font-weight:600;color:rgba(255,255,255,.9);margin-bottom:28px;backdrop-filter:blur(10px);animation:fadeInDown .8s ease}
.badge-dot{width:8px;height:8px;background:#EEDCFF;border-radius:50%;animation:pulseDot 2s ease infinite}
@keyframes pulseDot{0%,100%{opacity:1;transform:scale(1)}50%{opacity:.5;transform:scale(1.2)}}
.hero-title{font-size:56px;font-weight:600;line-height:1.2;color:var(--title-color);margin-bottom:28px;animation:fadeInUp .8s ease .1s both}
.hero-subtitle{font-size:24px;font-weight:400;color:var(--subtitle-color);line-height:1.6;margin-bottom:40px;animation:fadeInUp .8s ease .2s both}
.hero-cta{display:flex;gap:16px;justify-content:center;flex-wrap:wrap;margin-bottom:24px;animation:fadeInUp .8s ease .3s both}
.hero-cta .btn-primary{background:var(--gradient-btn);color:#fff;font-weight:700;box-shadow:0 4px 20px rgba(94,125,249,.3)}
.hero-cta .btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 30px rgba(94,125,249,.4)}
.hero-cta .btn-outline{background:#fff;color:var(--title-color);border:1.5px solid #E0E4ED}
.hero-cta .btn-outline:hover{border-color:var(--btn-end);color:var(--btn-end);background:#fff;transform:translateY(-2px);box-shadow:var(--shadow-md)}

/* Hero float icons */
.hero-float-icons{position:absolute;top:0;left:50%;width:1920px;max-width:100vw;height:600px;transform:translateX(-50%);pointer-events:none;z-index:1}
.float-icon{position:absolute;width:64px;height:64px;background:#fff;border-radius:16px;display:flex;align-items:center;justify-content:center;box-shadow:0 8px 32px rgba(0,0,0,.12),0 2px 8px rgba(94,125,249,.1);animation:floatBounce 4s ease-in-out infinite}
.float-icon svg{width:30px;height:30px}
.float-icon-1{top:120px;left:60px;animation-delay:0s}
.float-icon-2{top:320px;left:120px;animation-delay:1s}
.float-icon-3{top:140px;right:60px;animation-delay:.5s}
.float-icon-4{top:340px;right:120px;animation-delay:1.5s}
@keyframes floatBounce{0%,100%{transform:translateY(0)}50%{transform:translateY(-12px)}}

/* Hero visual - arch diagram */
.hero-visual{width:1100px;max-width:calc(100% - 48px);margin:-10px auto 60px;border:8px solid #EAE7FF;border-radius:20px;overflow:hidden;box-shadow:0 30px 80px rgba(0,0,0,.08),0 10px 30px rgba(94,125,249,.08);animation:fadeInUp .8s ease .5s both;position:relative;z-index:2;background:#fff}
.arch-diagram{padding:32px 28px 24px;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif}
.arch-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px}
.arch-header-left{display:flex;align-items:center;gap:12px}
.arch-header-icon{width:36px;height:36px;background:linear-gradient(135deg,#5E7DF9,#7C3AED);border-radius:10px;display:flex;align-items:center;justify-content:center}
.arch-header-icon svg{width:20px;height:20px}
.arch-header-text h3{font-size:15px;font-weight:600;color:#1a1a2e;margin:0}
.arch-header-text p{font-size:11px;color:#8b8fa8;margin:2px 0 0}
.arch-deploy-tags{display:flex;gap:8px}
.arch-deploy-tag{padding:4px 12px;border-radius:4px;font-size:11px;font-weight:500;border:1px solid #e2e4f0;color:#5E7DF9;background:rgba(94,125,249,.04)}
.arch-body{display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:16px;margin-bottom:16px}
.arch-panel{border-radius:14px;padding:20px 16px;position:relative;overflow:hidden}
.arch-panel-dam{background:linear-gradient(160deg,#eef0ff 0%,#f5f3ff 100%);border:1px solid #ddd8ff}
.arch-panel-cms{background:linear-gradient(160deg,#eef8ff 0%,#f0f4ff 100%);border:1px solid #d4e4ff}
.arch-panel-kox{background:linear-gradient(160deg,#f3eeff 0%,#f8f0ff 100%);border:1px solid #e4d8ff}
.arch-panel-title{display:flex;align-items:center;gap:8px;margin-bottom:14px}
.arch-panel-title-icon{width:24px;height:24px;border-radius:6px;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.arch-panel-title-icon.purple{background:linear-gradient(135deg,#7C3AED,#5E7DF9)}
.arch-panel-title-icon.blue{background:linear-gradient(135deg,#5E7DF9,#3B82F6)}
.arch-panel-title-icon.indigo{background:linear-gradient(135deg,#4F46E5,#7C3AED)}
.arch-panel-title span{font-size:13px;font-weight:600;color:#2d2b55}
.arch-tags{display:flex;flex-wrap:wrap;gap:6px}
.arch-tag{padding:5px 10px;border-radius:6px;font-size:11px;color:#4a4870;background:rgba(255,255,255,.8);border:1px solid rgba(94,125,249,.12);white-space:nowrap}
.arch-section-label{font-size:10px;font-weight:600;color:#7c7a9e;margin:12px 0 8px;padding-left:2px;letter-spacing:.5px}
.arch-kox-group{margin-bottom:10px}
.arch-kox-group-title{font-size:10px;font-weight:600;color:#5E7DF9;margin-bottom:6px;padding:3px 8px;background:rgba(94,125,249,.06);border-radius:4px;display:inline-block}
.arch-footer{background:linear-gradient(135deg,#2d2b55,#3b3870);border-radius:10px;padding:12px 20px;display:flex;align-items:center;justify-content:center;gap:10px}
.arch-footer span{font-size:12px;font-weight:500;color:rgba(255,255,255,.9);letter-spacing:.5px}
.arch-footer-icon{width:20px;height:20px;background:linear-gradient(135deg,#7C3AED,#5E7DF9);border-radius:5px;display:flex;align-items:center;justify-content:center}
.arch-footer-icon svg{width:12px;height:12px}

/* Hero stats */
.hero-stats{display:inline-flex;align-items:center;gap:48px;padding:32px 48px;background:rgba(255,255,255,.08);backdrop-filter:blur(20px);border:1px solid rgba(255,255,255,.15);border-radius:var(--radius-xl);box-shadow:0 8px 32px rgba(0,0,0,.2);animation:fadeInUp .8s ease .4s both}
.stat-item{display:flex;flex-direction:column;align-items:center;gap:4px}
.stat-number{font-size:40px;font-weight:600;background:linear-gradient(135deg,#a5b4fc,#fff);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;line-height:1}
.stat-suffix{font-size:24px;font-weight:600;background:linear-gradient(135deg,#a5b4fc,#fff);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-left:2px}
.stat-label{font-size:14px;color:rgba(255,255,255,.65);font-weight:400;margin-top:6px}
.stat-divider{width:1px;height:40px;background:rgba(255,255,255,.2)}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}
@keyframes fadeInUp{from{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}
@keyframes fadeInDown{from{opacity:0;transform:translateY(-20px)}to{opacity:1;transform:translateY(0)}}

/* 产品定位 */
.section-positioning{background:var(--bg-white)}
.positioning-grid{display:grid;grid-template-columns:1fr 1fr;gap:80px;align-items:center}
.positioning-content .section-tag{margin-bottom:16px}
.positioning-content .section-title{text-align:left;margin-bottom:24px}
.positioning-content .section-desc{text-align:left;font-size:14px;margin-bottom:40px}
.pain-points{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.pain-point{display:flex;gap:16px;align-items:flex-start;padding:20px;background:var(--bg-alt);border-radius:var(--radius-lg);border:1px solid #EEF0F6;transition:all .25s}
.pain-point:hover{background:#fff;border-color:rgba(137,142,255,.3);transform:translateY(-4px);box-shadow:var(--shadow-md)}
.pain-icon{width:44px;height:44px;border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;color:#fff;flex-shrink:0}
.pain-icon-1{background:linear-gradient(135deg,#898EFF,#5E7DF9)}
.pain-icon-2{background:linear-gradient(135deg,#a855f7,#c084fc)}
.pain-icon-3{background:linear-gradient(135deg,#229AF4,#5CB8F7)}
.pain-icon-4{background:linear-gradient(135deg,#ec4899,#f472b6)}
.pain-point h4{font-size:15px;font-weight:600;color:var(--title-color);margin-bottom:4px}
.pain-point p{font-size:13px;color:var(--subtitle-color)}

/* Orbit visual */
.positioning-visual{display:flex;justify-content:center;align-items:center}
.visual-card{width:480px;height:480px;position:relative;display:flex;align-items:center;justify-content:center}
.visual-orbit{position:relative;width:100%;height:100%}
.orbit-center{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);z-index:2}
.center-icon{width:100px;height:100px;background:var(--gradient-btn);border-radius:var(--radius-xl);display:flex;align-items:center;justify-content:center;color:#fff;box-shadow:var(--shadow-glow);animation:floatOrbit 4s ease infinite}
@keyframes floatOrbit{0%,100%{transform:translateY(0)}50%{transform:translateY(-10px)}}
.orbit-ring{position:absolute;top:50%;left:50%;border:1.5px dashed rgba(137,142,255,.3);border-radius:50%}
.orbit-ring-1{width:280px;height:280px;transform:translate(-50%,-50%);animation:rotateOrbit 20s linear infinite}
.orbit-ring-2{width:440px;height:440px;transform:translate(-50%,-50%);animation:rotateOrbit 30s linear infinite reverse}
@keyframes rotateOrbit{from{transform:translate(-50%,-50%) rotate(0deg)}to{transform:translate(-50%,-50%) rotate(360deg)}}
.orbit-dot{position:absolute;top:50%;left:50%;width:56px;height:56px;background:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow-md);transform:translate(-50%,-50%) rotate(var(--angle)) translateY(-140px) rotate(calc(-1 * var(--angle)));font-size:24px}
.orbit-ring-2 .orbit-dot{transform:translate(-50%,-50%) rotate(var(--angle)) translateY(-220px) rotate(calc(-1 * var(--angle)))}

/* 核心优势 */
.section-advantages{background:linear-gradient(180deg,var(--bg-white) 0%,var(--bg-alt) 100%);position:relative}
.section-advantages::before{content:'';position:absolute;top:0;right:0;width:500px;height:500px;background:radial-gradient(circle,rgba(94,125,249,.06) 0%,transparent 70%);pointer-events:none}
.advantages-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.advantage-card{padding:36px 32px;background:#fff;border:1px solid #EEF0F6;border-radius:var(--radius-xl);transition:all .25s;position:relative;overflow:hidden}
.advantage-card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:var(--gradient-btn);transform:scaleX(0);transform-origin:left;transition:transform .25s}
.advantage-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-xl);border-color:transparent}
.advantage-card:hover::before{transform:scaleX(1)}
.advantage-icon{width:64px;height:64px;border-radius:var(--radius-lg);display:flex;align-items:center;justify-content:center;color:#fff;margin-bottom:24px;transition:transform .25s}
.advantage-card:hover .advantage-icon{transform:scale(1.1) rotate(-5deg)}
.advantage-icon-1{background:linear-gradient(135deg,#898EFF,#5E7DF9);box-shadow:0 8px 24px rgba(94,125,249,.3)}
.advantage-icon-2{background:linear-gradient(135deg,#a855f7,#c084fc);box-shadow:0 8px 24px rgba(168,85,247,.3)}
.advantage-icon-3{background:linear-gradient(135deg,#10b981,#34d399);box-shadow:0 8px 24px rgba(16,185,129,.3)}
.advantage-icon-4{background:linear-gradient(135deg,#229AF4,#5CB8F7);box-shadow:0 8px 24px rgba(34,154,244,.3)}
.advantage-icon-5{background:linear-gradient(135deg,#ff8c3a,#ffaa5c);box-shadow:0 8px 24px rgba(255,140,58,.3)}
.advantage-icon-6{background:linear-gradient(135deg,#ec4899,#f472b6);box-shadow:0 8px 24px rgba(236,72,153,.3)}
.advantage-card h3{font-size:20px;font-weight:600;color:var(--title-color);margin-bottom:12px}
.advantage-card p{font-size:14px;color:var(--body-color);line-height:1.7;margin-bottom:20px}
.advantage-tag{display:inline-block;padding:4px 12px;background:rgba(137,142,255,.08);color:var(--btn-end);font-size:12px;font-weight:600;border-radius:var(--radius-full)}

/* Features Tabs */
.section-features{background:var(--bg-white)}
.features-tabs{background:var(--bg-alt);border-radius:var(--radius-2xl);padding:40px;border:1px solid #EEF0F6}
.tabs-nav{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;background:#fff;padding:8px;border-radius:var(--radius-lg);margin-bottom:32px;box-shadow:var(--shadow-sm)}
.tab-btn{display:flex;align-items:center;justify-content:center;gap:8px;padding:12px 16px;font-size:14px;font-weight:600;color:var(--subtitle-color);border-radius:var(--radius-md);transition:all .15s;background:none;border:none;cursor:pointer;font-family:var(--font-sans)}
.tab-btn:hover{color:var(--btn-end);background:rgba(137,142,255,.06)}
.tab-btn.active{color:#fff;background:var(--gradient-btn);box-shadow:0 4px 12px rgba(94,125,249,.3)}
.tab-panel{display:none;animation:fadeIn .4s ease}
.tab-panel.active{display:block}
.tab-panel-grid{display:grid;grid-template-columns:1fr 1.2fr;gap:48px;align-items:center;padding:16px}
.tab-panel-info h3{font-size:36px;font-weight:600;color:var(--title-color);margin-bottom:12px}
.tab-desc{font-size:14px;color:var(--subtitle-color);margin-bottom:28px;line-height:1.7}
.feature-list{display:flex;flex-direction:column;gap:14px;list-style:none;padding:0;margin:0}
.feature-list li{display:flex;align-items:center;gap:12px;font-size:14px;color:var(--body-color);font-weight:400}
.feature-check{display:flex;align-items:center;justify-content:center;width:24px;height:24px;background:var(--gradient-btn);color:#fff;border-radius:50%;font-size:12px;font-weight:800;flex-shrink:0}

/* Mock Dashboard */
.tab-panel-visual{perspective:1000px}
.mock-dashboard{background:#fff;border-radius:var(--radius-lg);box-shadow:var(--shadow-xl);overflow:hidden;transform:rotateY(-3deg) rotateX(2deg);transition:transform .4s;border:1px solid #E0E4ED}
.mock-dashboard:hover{transform:rotateY(0deg) rotateX(0deg)}
.mock-header{padding:12px 16px;background:var(--bg-alt);display:flex;align-items:center;gap:12px;border-bottom:1px solid #E0E4ED}
.mock-header span{font-size:12px;color:var(--subtitle-color);font-weight:500}
.mock-dots{display:flex;gap:6px}
.mock-dots span{width:10px;height:10px;border-radius:50%;padding:0}
.mock-dots span:nth-child(1){background:#ff5f57}
.mock-dots span:nth-child(2){background:#ffbd2e}
.mock-dots span:nth-child(3){background:#28c940}
.mock-body{display:flex;height:360px;background:var(--bg-alt)}
.mock-sidebar{width:64px;padding:16px 10px;background:#fff;border-right:1px solid #E0E4ED;display:flex;flex-direction:column;gap:8px;align-items:center}
.mock-menu-item{width:40px;height:40px;border-radius:10px;background:var(--bg-alt);display:flex;align-items:center;justify-content:center}
.mock-menu-item.active{background:var(--gradient-btn);box-shadow:0 4px 12px rgba(94,125,249,.3)}
.mock-menu-item svg{width:18px;height:18px;color:#8b92a5}
.mock-menu-item.active svg{color:#fff}
.mock-content{flex:1;padding:20px;display:flex;flex-direction:column;gap:16px;overflow:hidden}
.mock-stats-row{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.mock-stat-card{background:#fff;border-radius:10px;border:1px solid #E0E4ED;padding:14px;display:flex;flex-direction:column;gap:8px}
.mock-stat-card:nth-child(1){border-top:3px solid #5e7df9}
.mock-stat-card:nth-child(2){border-top:3px solid #f97316}
.mock-stat-card:nth-child(3){border-top:3px solid #10b981}
.mock-stat-label{font-size:11px;color:#8b92a5}
.mock-stat-value{font-size:20px;font-weight:700;color:var(--title-color)}
.mock-stat-change{font-size:10px;color:var(--success);font-weight:600}
.mock-chart-visual{flex:1;background:#fff;border-radius:10px;border:1px solid #E0E4ED;padding:16px;display:flex;align-items:flex-end;gap:8px;position:relative;overflow:hidden}
.mock-chart-bars{display:flex;align-items:flex-end;gap:8px;flex:1;padding:0 8px;position:relative;z-index:1}
.mock-chart-bar-group{flex:1;display:flex;flex-direction:column;align-items:center;gap:4px}
.mock-chart-bar{width:100%;border-radius:4px 4px 0 0;transition:height .5s ease;position:relative}
.mock-chart-bar.primary{background:var(--gradient-btn)}
.mock-chart-bar.secondary{background:rgba(94,125,249,.2);border:1px solid rgba(94,125,249,.3)}
.mock-chart-bar-label{font-size:9px;color:#8b92a5}

/* Mock - Keyword list */
.mock-account-list{flex:1;background:#fff;border-radius:10px;border:1px solid #E0E4ED;padding:14px;display:flex;flex-direction:column;gap:10px}
.mock-account-header{display:flex;align-items:center;justify-content:space-between;padding-bottom:10px;border-bottom:1px solid #f0f2f7}
.mock-account-title{font-size:12px;font-weight:600;color:var(--title-color)}
.mock-account-filter{display:flex;gap:6px}
.mock-account-filter span{font-size:10px;padding:3px 8px;border-radius:4px;background:var(--bg-alt);color:#8b92a5}
.mock-account-filter span:first-child{background:var(--gradient-btn);color:#fff}
.mock-account-row{display:flex;align-items:center;gap:10px;padding:8px 0;border-bottom:1px solid #f8f9fb}
.mock-avatar{width:32px;height:32px;border-radius:8px;flex-shrink:0;display:flex;align-items:center;justify-content:center;font-size:11px;font-weight:700;color:#fff}
.mock-avatar.av1{background:linear-gradient(135deg,#667eea,#764ba2)}
.mock-avatar.av2{background:linear-gradient(135deg,#f093fb,#f5576c)}
.mock-avatar.av3{background:linear-gradient(135deg,#4facfe,#00f2fe)}
.mock-account-info{flex:1;display:flex;flex-direction:column;gap:3px}
.mock-account-name{font-size:11px;font-weight:600;color:var(--title-color)}
.mock-account-meta{font-size:10px;color:#8b92a5}
.mock-platform-badge{font-size:9px;padding:2px 6px;border-radius:3px;font-weight:600}
.mock-platform-badge.google{background:#4285f4;color:#fff}
.mock-platform-badge.bing{background:#0078d4;color:#fff}
.mock-status-dot{width:8px;height:8px;border-radius:50%;background:var(--success);flex-shrink:0}

/* Mock - A/B test */
.mock-ab-test{flex:1;display:grid;grid-template-columns:1fr 1fr;gap:12px}
.mock-ab-card{background:#fff;border-radius:10px;border:1px solid #E0E4ED;padding:14px;display:flex;flex-direction:column;gap:10px}
.mock-ab-card.winner{border-color:var(--success);box-shadow:0 0 0 3px rgba(16,185,129,.08)}
.mock-ab-label{font-size:10px;font-weight:600;color:#8b92a5}
.mock-ab-card.winner .mock-ab-label{color:var(--success)}
.mock-ab-creative{height:60px;border-radius:6px;background:linear-gradient(135deg,#f0f2f7,#e2e6f0);position:relative;display:flex;align-items:center;padding:8px;font-size:9px;color:var(--title-color);line-height:1.4}
.mock-ab-card.winner .mock-ab-creative{background:linear-gradient(135deg,rgba(16,185,129,.08),rgba(16,185,129,.04));border:1px solid rgba(16,185,129,.15)}
.mock-ab-ctr{text-align:center;font-size:18px;font-weight:700;color:var(--title-color)}
.mock-ab-card.winner .mock-ab-ctr{color:var(--success)}

/* Mock - Funnel */
.mock-funnel{flex:1;display:flex;flex-direction:column;gap:6px;padding:8px 0}
.mock-funnel-step{position:relative;border-radius:8px;padding:10px 14px;display:flex;align-items:center;justify-content:space-between;color:#fff;font-size:12px;overflow:hidden;transition:all .3s}
.mock-funnel-step.f1{background:linear-gradient(90deg,#5E7DF9,#898EFF);width:100%}
.mock-funnel-step.f2{background:linear-gradient(90deg,#7C3AED,#a855f7);width:84%}
.mock-funnel-step.f3{background:linear-gradient(90deg,#229AF4,#5CB8F7);width:62%}
.mock-funnel-step.f4{background:linear-gradient(90deg,#10b981,#34d399);width:35%}
.mock-funnel-step .fs-label{font-weight:600}
.mock-funnel-step .fs-value{font-weight:800;font-size:13px}

/* Use Cases */
.section-usecases{background:linear-gradient(180deg,var(--bg-alt) 0%,var(--bg-white) 100%);position:relative;overflow:hidden}
.usecases-carousel{position:relative}
.usecases-slider{position:relative;overflow:hidden;border-radius:var(--radius-2xl);box-shadow:var(--shadow-lg)}
.usecase-card{display:none;background:#fff;border-radius:var(--radius-2xl);overflow:hidden;grid-template-columns:1fr 1.2fr;animation:usecaseFadeIn .5s ease}
.usecase-card.active{display:grid}
@keyframes usecaseFadeIn{from{opacity:0;transform:translateX(20px)}to{opacity:1;transform:translateX(0)}}
.usecase-visual{padding:48px 36px;display:flex;align-items:center;justify-content:center;position:relative;overflow:hidden;min-height:400px}
.usecase-card:nth-child(1) .usecase-visual{background:linear-gradient(160deg,#f0f3ff 0%,#e8ecff 100%)}
.usecase-card:nth-child(2) .usecase-visual{background:linear-gradient(160deg,#f0f0ff 0%,#ece8ff 100%)}
.usecase-card:nth-child(3) .usecase-visual{background:linear-gradient(160deg,#fff5f0 0%,#ffede8 100%)}
.usecase-card:nth-child(4) .usecase-visual{background:linear-gradient(160deg,#eefff5 0%,#e8fff0 100%)}
.usecase-flow{display:flex;flex-direction:column;gap:12px;width:100%;max-width:320px}
.usecase-flow-step{display:flex;align-items:center;gap:12px;padding:14px 18px;background:#fff;border-radius:10px;box-shadow:0 2px 8px rgba(0,0,0,.06);font-size:13px;color:var(--title-color);font-weight:500}
.usecase-flow-step::before{content:'';width:8px;height:8px;border-radius:50%;flex-shrink:0}
.usecase-card:nth-child(1) .usecase-flow-step::before{background:#5E7DF9}
.usecase-card:nth-child(2) .usecase-flow-step::before{background:#7C3AED}
.usecase-card:nth-child(3) .usecase-flow-step::before{background:#f59e0b}
.usecase-card:nth-child(4) .usecase-flow-step::before{background:#10b981}
.usecase-flow-arrow{display:flex;justify-content:center;color:#C8CDE0;font-size:18px;line-height:1}
.usecase-content{padding:48px 44px;position:relative;z-index:1;display:flex;flex-direction:column;justify-content:center}
.usecase-scene-tag{display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:600;padding:5px 14px;border-radius:4px;margin-bottom:14px;width:fit-content}
.usecase-card:nth-child(1) .usecase-scene-tag{background:rgba(94,125,249,.08);color:#5E7DF9}
.usecase-card:nth-child(2) .usecase-scene-tag{background:rgba(124,58,237,.08);color:#7C3AED}
.usecase-card:nth-child(3) .usecase-scene-tag{background:rgba(245,158,11,.08);color:#d97706}
.usecase-card:nth-child(4) .usecase-scene-tag{background:rgba(16,185,129,.08);color:#059669}
.usecase-content h3{font-size:26px;font-weight:600;color:var(--title-color);margin-bottom:20px}
.usecase-pain,.usecase-solution,.usecase-value{display:flex;gap:16px;padding:12px 0;border-bottom:1px dashed #E0E4ED}
.usecase-value{border-bottom:none}
.pain-label,.solution-label,.value-label{flex-shrink:0;width:48px;height:24px;display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:600;border-radius:4px;margin-top:2px}
.pain-label{background:rgba(239,68,68,.08);color:var(--danger)}
.solution-label{background:rgba(137,142,255,.08);color:var(--btn-end)}
.value-label{background:rgba(16,185,129,.08);color:var(--success)}
.usecase-pain p,.usecase-solution p,.usecase-value p{flex:1;font-size:14px;color:var(--body-color);line-height:1.7}
.usecase-cta{margin-top:24px}
.usecase-cta a{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:#fff;text-decoration:none;padding:10px 24px;border-radius:var(--radius-lg);transition:all .25s}
.usecase-card:nth-child(1) .usecase-cta a{background:linear-gradient(135deg,#5E7DF9,#3B5CE0)}
.usecase-card:nth-child(2) .usecase-cta a{background:linear-gradient(135deg,#7C3AED,#5B21B6)}
.usecase-card:nth-child(3) .usecase-cta a{background:linear-gradient(135deg,#f59e0b,#d97706)}
.usecase-card:nth-child(4) .usecase-cta a{background:linear-gradient(135deg,#10b981,#059669)}
.usecase-cta a:hover{transform:translateX(4px);box-shadow:0 4px 16px rgba(0,0,0,.15)}
.usecases-arrow{position:absolute;top:50%;transform:translateY(-50%);width:44px;height:44px;border-radius:50%;background:#fff;border:1px solid #EEF0F6;box-shadow:0 4px 16px rgba(0,0,0,.1);display:flex;align-items:center;justify-content:center;cursor:pointer;z-index:10;transition:all .3s}
.usecases-arrow:hover{box-shadow:0 6px 24px rgba(94,125,249,.2);border-color:rgba(94,125,249,.3)}
.usecases-arrow svg{width:20px;height:20px;stroke:var(--title-color);fill:none;stroke-width:2}
.usecases-arrow-prev{left:-22px}
.usecases-arrow-next{right:-22px}
.usecases-dots{display:flex;justify-content:center;align-items:center;gap:10px;margin-top:32px}
.usecases-dot{width:10px;height:10px;border-radius:50%;background:#D1D5E3;cursor:pointer;transition:all .3s;border:none;padding:0;outline:none}
.usecases-dot:hover{background:#898EFF;transform:scale(1.2)}
.usecases-dot.active{background:linear-gradient(135deg,#5E7DF9,#3B5CE0);width:32px;border-radius:5px;box-shadow:0 2px 8px rgba(94,125,249,.4)}

/* Clients / Testimonials */
.section-clients{background:var(--bg-white)}
.testimonial-wrapper{display:flex;flex-direction:column;align-items:center}
.testimonial-stack{position:relative;min-height:320px;width:100%;max-width:800px}
.testimonial-card{background:linear-gradient(135deg,#5E7DF9,#3B5CE0);color:#fff;padding:40px 32px;border-radius:var(--radius-2xl);position:absolute;inset:0;overflow:hidden;display:flex;flex-direction:column;justify-content:center;transition:transform .7s cubic-bezier(.4,0,.2,1),opacity .7s cubic-bezier(.4,0,.2,1)}
.testimonial-card::before{content:'';position:absolute;top:-50px;right:-50px;width:200px;height:200px;background:radial-gradient(circle,rgba(34,154,244,.3) 0%,transparent 70%)}
.testimonial-card.active{z-index:3;transform:translateX(0) scale(1);opacity:1}
.testimonial-card.next{z-index:2;transform:translateX(20px) scale(.95);opacity:.55;pointer-events:none}
.testimonial-card.next2{z-index:1;transform:translateX(40px) scale(.9);opacity:.25;pointer-events:none}
.testimonial-card.hidden{z-index:0;transform:translateX(60px) scale(.85);opacity:0;pointer-events:none}
.testimonial-card.exiting{z-index:4;transform:translateX(-110%) scale(.95);opacity:0;pointer-events:none}
.testimonial-quote{font-size:72px;line-height:1;color:rgba(255,255,255,.2);font-family:Georgia,serif;margin-bottom:8px}
.testimonial-text{font-size:16px;line-height:1.7;margin-bottom:28px;position:relative;z-index:1}
.testimonial-author{display:flex;align-items:center;gap:12px;position:relative;z-index:1}
.author-avatar{width:44px;height:44px;background:linear-gradient(135deg,#898EFF,#229AF4);border-radius:50%;border:2px solid rgba(255,255,255,.3)}
.author-name{display:block;font-size:14px;font-weight:600;color:#fff}
.author-company{display:block;font-size:12px;color:rgba(255,255,255,.7);margin-top:2px}
.testimonial-dots{display:flex;justify-content:center;align-items:center;gap:10px;margin-top:28px;position:relative;z-index:5}
.testimonial-dot{width:10px;height:10px;border-radius:50%;background:#D1D5E3;cursor:pointer;transition:all .3s;border:none;padding:0;outline:none}
.testimonial-dot:hover{background:#898EFF;transform:scale(1.2)}
.testimonial-dot.active{background:var(--gradient-btn);width:32px;border-radius:5px;box-shadow:0 2px 8px rgba(94,125,249,.4)}

/* CTA */
.cta-section{padding:0;position:relative;overflow:hidden}
.cta-inner{max-width:none;margin:0;background:linear-gradient(90deg,#2554fe 0%,#06b6d4 100%);padding:90px 40px;text-align:center;position:relative;overflow:hidden}
.cta-inner::before{content:'';position:absolute;top:-30%;right:-5%;width:600px;height:600px;background:radial-gradient(circle,rgba(255,255,255,0.12),transparent 70%);border-radius:50%;pointer-events:none}
.cta-inner::after{content:'';position:absolute;bottom:-40%;left:-10%;width:500px;height:500px;background:radial-gradient(circle,rgba(255,255,255,0.08),transparent 70%);border-radius:50%;pointer-events:none}
.cta-title{font-size:36px;font-weight:800;color:#fff;margin-bottom:12px;position:relative;z-index:1}
.cta-desc{font-size:17px;color:rgba(255,255,255,0.9);line-height:1.6;margin-bottom:36px;position:relative;z-index:1}
.cta-button{display:inline-flex;align-items:center;gap:8px;padding:16px 48px;background:#fff;color:#2554fe;font-size:16px;font-weight:700;border-radius:10px;transition:all .25s;position:relative;z-index:1;box-shadow:0 8px 24px rgba(0,0,0,0.15)}
.cta-button:hover{transform:translateY(-2px);box-shadow:0 12px 32px rgba(0,0,0,0.2);background:#f8f9ff}

/* ===== FLOAT WIDGET ===== */
.float-widget{position:fixed;right:20px;top:50%;transform:translateY(-50%);z-index:9999;display:flex;flex-direction:column;gap:10px;align-items:flex-end}
.float-btn{position:relative;display:flex;align-items:center;justify-content:center;width:52px;height:52px;border-radius:12px;background:#fff;border:1px solid var(--border);box-shadow:0 4px 16px rgba(0,0,0,.08);cursor:pointer;transition:all .25s;color:var(--blue)}
.float-btn svg{width:22px;height:22px;stroke:currentColor;stroke-width:1.8;fill:none;stroke-linecap:round;stroke-linejoin:round}
.float-btn:hover{background:linear-gradient(135deg,var(--blue),var(--purple));color:#fff;border-color:transparent;transform:translateY(-2px);box-shadow:0 8px 24px rgba(37,99,235,.25)}
.float-btn .float-tip{position:absolute;right:60px;top:50%;transform:translateY(-50%) translateX(-8px);white-space:nowrap;background:#1a1a2e;color:#fff;font-size:13px;padding:8px 14px;border-radius:8px;opacity:0;visibility:hidden;transition:all .25s;pointer-events:none;font-weight:500}
.float-btn:hover .float-tip{opacity:1;visibility:visible;transform:translateY(-50%) translateX(0)}
.float-btn .float-tip::after{content:'';position:absolute;right:-5px;top:50%;transform:translateY(-50%);border-width:5px 0 5px 6px;border-style:solid;border-color:transparent transparent transparent #1a1a2e}
.float-btn.wechat-btn:hover .wechat-pop{opacity:1;visibility:visible;transform:translateY(-50%) translateX(0)}
.wechat-pop{position:absolute;right:60px;top:50%;transform:translateY(-50%) translateX(-8px);opacity:0;visibility:hidden;transition:all .25s;background:#fff;border-radius:14px;padding:16px;box-shadow:0 8px 32px rgba(0,0,0,.12);text-align:center;width:160px}
.wechat-pop img{width:120px;height:120px;border-radius:8px;margin:0 auto 8px}
.wechat-pop .wp-title{font-size:14px;font-weight:600;color:var(--text)}
.wechat-pop .wp-sub{font-size:12px;color:var(--muted);margin-top:4px}
.float-btn.phone-btn:hover .phone-pop,.float-btn.phone-btn.active .phone-pop{opacity:1;visibility:visible;transform:translateY(-50%) translateX(0)}
.phone-pop{position:absolute;right:60px;top:50%;transform:translateY(-50%) translateX(-8px);opacity:0;visibility:hidden;transition:all .25s;background:#fff;border-radius:14px;padding:16px 20px;box-shadow:0 8px 32px rgba(0,0,0,.12);display:flex;align-items:center;gap:12px}
.phone-pop-icon{width:40px;height:40px;border-radius:10px;background:#fef2f2;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.phone-pop-icon svg{width:20px;height:20px;stroke:#ef4444;stroke-width:2;fill:none}
.phone-pop-num{font-size:20px;font-weight:800;color:var(--text)}
.float-btn.top-btn{opacity:0;visibility:hidden;transform:translateY(20px)}
.float-btn.top-btn.show{opacity:1;visibility:visible;transform:translateY(0)}

/* ===== FOOTER ===== */
.footer{background:#0a0f1e;padding:64px 40px 32px}
.footer-inner{max-width:1280px;margin:0 auto}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr 1fr;gap:36px;margin-bottom:48px}
.footer-brand .f-logo{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand .f-logo img{width:40px;height:40px;border-radius:10px}
.footer-brand .f-logo span{font-size:20px;font-weight:700;color:#fff}
.footer-brand .f-logo span em{color:#60a5fa;font-style:normal}
.footer-brand p{font-size:14px;color:rgba(255,255,255,.4);line-height:1.8;margin-bottom:20px;max-width:320px}
.footer-contact{display:flex;flex-direction:column;gap:10px}
.footer-contact-item{display:flex;align-items:center;gap:8px;font-size:13px;color:rgba(255,255,255,.5)}
.footer-contact-item svg{width:16px;height:16px;stroke:rgba(255,255,255,.4);stroke-width:1.8;fill:none;stroke-linecap:round;stroke-linejoin:round}
.footer-col h4{font-size:15px;font-weight:600;color:#fff;margin-bottom:20px}
.footer-col ul{list-style:none;display:flex;flex-direction:column;gap:12px}
.footer-col ul li a{font-size:14px;color:rgba(255,255,255,.4);transition:color .2s}
.footer-col ul li a:hover{color:#60a5fa}
.footer-bottom{padding-top:24px;border-top:1px solid rgba(255,255,255,.08);display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px}
.footer-bottom p{font-size:13px;color:rgba(255,255,255,.3)}
.footer-bottom a{font-size:13px;color:rgba(255,255,255,.3);transition:color .2s}
.footer-bottom a:hover{color:#60a5fa}

/* Scroll Animations */
[data-aos]{opacity:0;transform:translateY(30px);transition:all .8s cubic-bezier(.4,0,.2,1)}
[data-aos].aos-animate{opacity:1;transform:translateY(0)}

/* Responsive */
@media(max-width:1024px){
  .section{padding:80px 0}
  .positioning-grid{grid-template-columns:1fr;gap:48px}
  .positioning-content .section-title,.positioning-content .section-desc{text-align:center}
  .visual-card{width:360px;height:360px}
  .orbit-ring-1{width:220px;height:220px}
  .orbit-ring-2{width:340px;height:340px}
  .advantages-grid{grid-template-columns:repeat(2,1fr)}
  .tabs-nav{grid-template-columns:repeat(2,1fr)}
  .tab-panel-grid{grid-template-columns:1fr}
  .usecase-card.active{grid-template-columns:1fr}
  .usecases-arrow-prev{left:8px}
  .usecases-arrow-next{right:8px}
  .section-title{font-size:32px}
  .section-desc{font-size:18px}
  .arch-body{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:768px){
  .section{padding:60px 0}
  .hero{padding:80px 0 60px;min-height:auto}
  .hero-title{font-size:32px}
  .hero-subtitle{font-size:16px}
  .hero-stats{flex-direction:column;gap:24px;padding:24px 32px}
  .stat-divider{width:40px;height:1px}
  .hero-visual{border-width:5px;border-radius:14px}
  .hero-float-icons{display:none}
  .pain-points{grid-template-columns:1fr}
  .advantages-grid{grid-template-columns:1fr}
  .features-tabs{padding:20px}
  .tabs-nav{grid-template-columns:repeat(2,1fr)}
  .tab-panel-info h3{font-size:24px}
  .btn-lg{height:44px;padding:0 24px;font-size:15px}
  .section-title{font-size:28px}
  .section-desc{font-size:16px}
  .nav-items,.nav-phone{display:none}
  .float-widget{right:12px;top:50%;transform:translateY(-50%)}
  .float-btn{width:46px;height:46px}
  .float-btn .float-tip,.float-btn .wechat-pop{display:none}
  .footer-grid{grid-template-columns:1fr;gap:32px}
}