/* ======================================================
   泉研智能 Quanyan Tech – Design System v4.0
   Dark Crimson & Industrial Tech Theme (红黑机械科技风)
   ====================================================== */

/* ---------- TOKENS ---------- */
:root {
    /* 核心背景：深邃纯黑带极暗的红色辉光 */
    --bg-dark: #0A0505;
    --bg-darker: #050202;
    --bg-card: rgba(255, 255, 255, 0.02);
    --bg-card-hover: rgba(255, 40, 40, 0.04);
    --bg-glass: rgba(10, 5, 5, 0.85);
    --bg-alt: #120808;
    
    /* 核心主色：熔岩红、超跑红 */
    --accent: #FF2A2A; 
    --accent-dim: rgba(255, 42, 42, 0.12);
    --accent-glow: 0 0 25px rgba(255, 42, 42, 0.35);
    --red-dark: #990000;
    
    /* 渐变体系：从亮红到深红 */
    --gradient: linear-gradient(135deg, #FF4D4D, #B30000);
    --gradient-text: linear-gradient(135deg, #FF6666 20%, #CC0000);
    
    /* 辅助色 */
    --green: #00FF88;
    
    /* 文本色系 */
    --text-white: #ffffff;
    --text-pri: rgba(255, 255, 255, 0.92);
    --text-sec: rgba(255, 255, 255, 0.65);
    --text-mut: rgba(255, 255, 255, 0.4);
    
    /* 边框与阴影 */
    --border: rgba(255, 255, 255, 0.06);
    --border-accent: rgba(255, 42, 42, 0.25);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.5);
    --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.6);
    --shadow-glow: 0 0 40px rgba(255, 42, 42, 0.1);
    
    /* 网格与布局 */
    --nav-h: 72px;
    --sec-pad: 110px;
    --container: 1200px;
    --r: 12px; /* 偏小的圆角，增加工业机械感 */
    --r-sm: 6px;
    
    /* 字体体系 */
    --font-d: "Sora", "Noto Sans SC", sans-serif;
    --font-b: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
    
    /* 动画缓动 */
    --ease: cubic-bezier(.4, 0, .2, 1);
    --tr: .35s var(--ease);
}

/* ---------- RESET ---------- */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:var(--nav-h)}
body{font-family:var(--font-b);background:var(--bg-dark);color:var(--text-pri);line-height:1.7;overflow-x:hidden;-webkit-font-smoothing:antialiased}
a{text-decoration:none;color:inherit}
ul,ol{list-style:none}
img{max-width:100%;display:block}
button{border:none;background:none;cursor:pointer;font-family:inherit}
input,select,textarea{font-family:inherit}

::-webkit-scrollbar{width:6px}
::-webkit-scrollbar-track{background:var(--bg-darker)}
::-webkit-scrollbar-thumb{background:rgba(255,42,42,.3);border-radius:3px}
::-webkit-scrollbar-thumb:hover{background:var(--accent)}

.skip-link{position:absolute;top:8px;left:8px;padding:10px 16px;background:var(--accent);color:var(--text-white);border-radius:var(--r-sm);font-size:.875rem;font-weight:600;transform:translateY(-120%);transition:transform .2s;z-index:9999}
.skip-link:focus{transform:translateY(0)}

/* ---------- LAYOUT ---------- */
.container{width:92%;max-width:var(--container);margin:0 auto}
.section{padding:var(--sec-pad) 0;position:relative}
.section-header{text-align:center;margin-bottom:64px}
.section-tag{display:inline-flex;align-items:center;gap:8px;font-size:.8125rem;font-weight:700;color:var(--accent);text-transform:uppercase;letter-spacing:3px;margin-bottom:16px}
.section-tag::before,.section-tag::after{content:"";width:24px;height:1px;background:var(--accent);opacity:.5}
.section-title{font-family:var(--font-d);font-size:clamp(28px,4vw,42px);font-weight:700;color:var(--text-white);line-height:1.25;letter-spacing:-.5px}
.section-desc{font-size:1rem;color:var(--text-sec);max-width:660px;margin:16px auto 0;line-height:1.8}

/* ---------- HEADER ---------- */
.header{position:fixed;top:0;left:0;right:0;z-index:1000;height:var(--nav-h);background:transparent;transition:background var(--tr),box-shadow var(--tr)}
.header.is-scrolled{background:var(--bg-glass);backdrop-filter:blur(20px) saturate(1.2);-webkit-backdrop-filter:blur(20px) saturate(1.2);box-shadow:0 1px 0 var(--border),var(--shadow-sm)}
.nav{display:flex;align-items:center;justify-content:space-between;height:var(--nav-h);max-width:1400px;margin:0 auto;padding:0 32px}
.logo{display:flex;flex-direction:column;gap:2px;z-index:1001;position:relative}
.logo::after{content:"";position:absolute;left:-16px;top:50%;transform:translateY(-50%);width:4px;height:24px;background:var(--accent);border-radius:2px}
.logo-text{font-family:var(--font-d);font-size:1.25rem;font-weight:800;color:var(--text-white);letter-spacing:2px}
.logo-en{font-family:var(--font-d);font-size:.625rem;color:var(--accent);text-transform:uppercase;letter-spacing:4px;font-weight:600}
.nav-links{display:flex;gap:8px;align-items:center}
.nav-links a{padding:8px 18px;font-size:.875rem;font-weight:500;color:var(--text-sec);border-radius:var(--r-sm);transition:all var(--tr);position:relative}
.nav-links a::after{content:"";position:absolute;bottom:0;left:50%;transform:translateX(-50%);width:0;height:2px;background:var(--accent);transition:width var(--tr)}
.nav-links a:hover,.nav-links a.active{color:var(--text-white);background:rgba(255,255,255,.03)}
.nav-links a.active::after,.nav-links a:hover::after{width:20px}
.nav-consult{background:var(--gradient)!important;color:#fff!important;font-weight:600!important;padding:8px 24px!important;border-radius:999px!important}
.nav-consult::after{display:none}
.nav-consult:hover{box-shadow:var(--accent-glow);transform:translateY(-1px)}
.nav-right{display:flex;align-items:center;gap:12px}
.lang-switch{display:flex;border:1px solid var(--border);border-radius:var(--r-sm);overflow:hidden}
.lang-btn{padding:6px 16px;font-size:.75rem;font-weight:600;color:var(--text-mut);transition:all var(--tr);border:none;background:transparent;letter-spacing:1px}
.lang-btn.active{background:rgba(255,42,42,.15);color:var(--accent)}
.lang-btn:hover{color:var(--text-white)}
.nav-toggle{display:none;flex-direction:column;gap:5px;padding:8px;z-index:1001;cursor:pointer}
.nav-toggle-line{width:22px;height:2px;background:var(--text-white);border-radius:2px;transition:transform .3s,opacity .3s}
body.nav-open .nav-toggle-line:nth-child(1){transform:rotate(45deg) translate(5px,5px)}
body.nav-open .nav-toggle-line:nth-child(2){opacity:0}
body.nav-open .nav-toggle-line:nth-child(3){transform:rotate(-45deg) translate(5px,-5px)}
.nav-backdrop{position:fixed;inset:0;background:rgba(0,0,0,.8);backdrop-filter:blur(6px);opacity:0;pointer-events:none;transition:opacity .3s;z-index:999}
body.nav-open{overflow:hidden}
body.nav-open .nav-backdrop{opacity:1;pointer-events:auto}

/* ---------- HERO ---------- */
.hero{min-height:100vh;display:flex;align-items:center;justify-content:center;position:relative;overflow:hidden;background:radial-gradient(ellipse at 50% 50%,rgba(200,0,0,.08) 0%,transparent 60%),var(--bg-dark)}
#heroCanvas{position:absolute;inset:0;width:100%;height:100%;z-index:0}
.hero::after{content:"";position:absolute;inset:0;background:url('data:image/svg+xml;utf8,<svg width="40" height="40" xmlns="http://www.w3.org/2000/svg"><circle cx="2" cy="2" r="1" fill="rgba(255,255,255,0.02)"/></svg>');z-index:0;pointer-events:none}
.hero-content{position:relative;z-index:1;text-align:center;padding:0 24px;max-width:960px}
.hero-eyebrow{display:inline-flex;align-items:center;gap:10px;padding:6px 24px;border:1px solid var(--border-accent);border-radius:var(--r-sm);font-size:.875rem;font-weight:600;color:var(--accent);margin-bottom:32px;background:rgba(255,42,42,.05);backdrop-filter:blur(10px);letter-spacing:2px;text-transform:uppercase}
.hero-eyebrow .dot{width:6px;height:6px;background:var(--accent);border-radius:50%;box-shadow:var(--accent-glow);animation:pulse-dot 2s ease infinite}
@keyframes pulse-dot{0%,100%{opacity:1;transform:scale(1)}50%{opacity:.4;transform:scale(1.5)}}
.hero-title{font-family:var(--font-d);font-size:clamp(36px,6vw,68px);font-weight:800;color:var(--text-white);line-height:1.2;letter-spacing:-1px;margin-bottom:28px}
.hero-title .gradient-text{background:var(--gradient-text);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;position:relative;display:inline-block}
.hero-subtitle{font-size:clamp(16px,2vw,18px);color:var(--text-sec);line-height:2;margin-bottom:48px;max-width:800px;margin-left:auto;margin-right:auto;font-weight:400}
.hero-actions{display:flex;justify-content:center;gap:20px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:8px;padding:16px 40px;border-radius:var(--r-sm);font-size:.9375rem;font-weight:700;transition:all var(--tr);cursor:pointer;letter-spacing:1px;text-transform:uppercase}
.btn-primary{background:var(--gradient);color:#fff;box-shadow:0 4px 20px rgba(255,42,42,.3);position:relative;overflow:hidden}
.btn-primary::before{content:"";position:absolute;top:0;left:-100%;width:100%;height:100%;background:linear-gradient(90deg,transparent,rgba(255,255,255,0.2),transparent);transition:left 0.5s ease}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 30px rgba(255,42,42,.5)}
.btn-primary:hover::before{left:100%}
.btn-ghost{border:1px solid rgba(255,255,255,.15);color:var(--text-white);background:rgba(255,255,255,.02);backdrop-filter:blur(10px)}
.btn-ghost:hover{border-color:var(--accent);background:rgba(255,42,42,.08);color:var(--accent)}
.hero-scroll{position:absolute;bottom:40px;left:50%;transform:translateX(-50%);display:flex;flex-direction:column;align-items:center;gap:12px;color:var(--text-mut);font-size:.6875rem;letter-spacing:3px;animation:float 3s ease-in-out infinite}
.hero-scroll .scroll-line{width:2px;height:40px;background:linear-gradient(to bottom,var(--accent),transparent)}
@keyframes float{0%,100%{transform:translateX(-50%) translateY(0)}50%{transform:translateX(-50%) translateY(8px)}}

/* ---------- PHILOSOPHY ---------- */
.philosophy{padding:90px 0;background:var(--bg-alt);border-top:1px solid var(--border);border-bottom:1px solid var(--border);position:relative}
.philosophy::before{content:"";position:absolute;inset:0;background:radial-gradient(ellipse at 50% 0%,rgba(255,42,42,.05) 0%,transparent 70%);pointer-events:none}
.philosophy-inner{max-width:1000px;margin:0 auto;text-align:center;position:relative}
.philosophy-quote{font-size:clamp(22px,3.5vw,32px);font-weight:800;color:var(--text-white);line-height:1.5;margin-bottom:28px;font-family:var(--font-d);letter-spacing:1px}
.philosophy-quote em{font-style:normal;color:var(--accent);border-bottom:2px solid var(--accent);padding-bottom:4px}
.philosophy-sub{font-size:1.0625rem;color:var(--text-sec);line-height:1.9;max-width:800px;margin:0 auto}
.philosophy-values{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:60px;text-align:left}
.philosophy-value{padding:32px 24px;border-radius:var(--r);background:var(--bg-card);border:1px solid var(--border);border-left:3px solid var(--accent);transition:all var(--tr)}
.philosophy-value:hover{border-color:var(--border-accent);background:var(--bg-card-hover);transform:translateX(4px);box-shadow:var(--shadow-glow)}
.philosophy-value h4{font-family:var(--font-d);font-size:1.75rem;font-weight:800;color:var(--text-white);margin-bottom:8px}
.philosophy-value h4 span{font-size:1rem;color:var(--accent);margin-left:4px}
.philosophy-value p{font-size:.875rem;color:var(--text-sec);line-height:1.6}

/* ---------- STATS ---------- */
.stats{padding:80px 0;background:var(--bg-dark)}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.stat-card{text-align:center;padding:36px 16px;border-radius:var(--r);background:var(--bg-card);border:1px solid var(--border);transition:all var(--tr);position:relative;overflow:hidden}
.stat-card::before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:var(--gradient);opacity:0;transition:opacity var(--tr)}
.stat-card:hover{background:var(--bg-card-hover);border-color:var(--border-accent);transform:translateY(-6px);box-shadow:var(--shadow-glow)}
.stat-card:hover::before{opacity:1}
.stat-number{font-family:var(--font-d);font-size:clamp(32px,5vw,48px);font-weight:800;color:var(--text-white);line-height:1;margin-bottom:8px}
.stat-unit{font-family:var(--font-d);font-size:.875rem;color:var(--accent);font-weight:600;margin-bottom:12px;display:block;letter-spacing:1px}
.stat-label{font-size:.875rem;color:var(--text-sec);font-weight:500}

/* ---------- ABOUT ---------- */
.about{background:var(--bg-alt)}
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:80px;align-items:center}
.about-text p{font-size:1rem;color:var(--text-sec);line-height:2;margin-bottom:20px}
.about-subtitle{font-family:var(--font-d);font-size:1.5rem;font-weight:700;color:var(--text-white);margin-bottom:24px;position:relative;padding-left:14px}
.about-subtitle::before{content:"";position:absolute;left:0;top:4px;bottom:4px;width:3px;background:var(--accent);border-radius:2px}
.about-highlights{display:grid;gap:16px;margin-top:36px}
.highlight-item{display:flex;align-items:flex-start;gap:18px;padding:20px;border-radius:var(--r);background:var(--bg-dark);border:1px solid var(--border);transition:all var(--tr)}
.highlight-item:hover{border-color:var(--border-accent);background:var(--bg-card-hover)}
.highlight-icon{width:48px;height:48px;display:flex;align-items:center;justify-content:center;border-radius:var(--r-sm);background:rgba(255,42,42,.1);color:var(--accent);flex-shrink:0;font-size:1.5rem;border:1px solid rgba(255,42,42,.2)}
.highlight-item strong{display:block;font-size:.9375rem;font-weight:700;color:var(--text-white);margin-bottom:6px;letter-spacing:1px}
.highlight-item span{font-size:.8125rem;color:var(--text-sec);line-height:1.6}
.about-cards{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.about-card{padding:30px;border-radius:var(--r);background:var(--bg-dark);border:1px solid var(--border);transition:all var(--tr);position:relative;overflow:hidden}
.about-card::after{content:"";position:absolute;bottom:0;left:0;right:0;height:4px;background:var(--accent);transform:translateY(4px);transition:transform var(--tr)}
.about-card:hover{border-color:var(--border-accent);transform:translateY(-4px);box-shadow:var(--shadow-glow)}
.about-card:hover::after{transform:translateY(0)}
.about-card-icon{font-size:1.875rem;margin-bottom:16px;color:var(--text-white)}
.about-card h4{font-family:var(--font-d);font-size:1.0625rem;font-weight:700;color:var(--text-white);margin-bottom:10px}
.about-card p{font-size:.875rem;color:var(--text-sec);line-height:1.7}

/* ---------- PRODUCTS ---------- */
.products{background:var(--bg-dark)}
.products-category{margin-bottom:80px}
.products-category:last-child{margin-bottom:0}
.category-title{font-family:var(--font-d);font-size:1.375rem;font-weight:800;color:var(--text-white);margin-bottom:32px;padding-left:16px;position:relative;letter-spacing:1px}
.category-title::before{content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);width:4px;height:24px;background:var(--gradient);border-radius:2px}
.products-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:24px}
.product-card{padding:36px;border-radius:var(--r);background:var(--bg-card);border:1px solid var(--border);transition:all var(--tr);position:relative;overflow:hidden;display:flex;flex-direction:column}
.product-card::before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:var(--gradient);transform:scaleX(0);transition:transform var(--tr);transform-origin:left}
.product-card:hover{border-color:var(--border-accent);background:var(--bg-alt);transform:translateY(-4px);box-shadow:var(--shadow-glow)}
.product-card:hover::before{transform:scaleX(1)}
.product-icon{width:64px;height:64px;display:flex;align-items:center;justify-content:center;border-radius:var(--r-sm);border:1px solid var(--border-accent);background:rgba(255,42,42,.05);font-size:1.75rem;margin-bottom:24px;transition:all var(--tr);color:var(--text-white)}
.product-card:hover .product-icon{background:rgba(255,42,42,.15);border-color:var(--accent);transform:scale(1.05)}
.product-title{font-family:var(--font-d);font-size:1.25rem;font-weight:700;color:var(--text-white);margin-bottom:16px;line-height:1.4}
.product-brief{font-size:.875rem;color:var(--text-sec);line-height:1.8;margin-bottom:24px}

.product-specs{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-top:auto;padding-bottom:24px}
.spec-item{text-align:left;padding:12px;border-radius:var(--r-sm);border:1px solid var(--border);background:var(--bg-dark)}
.spec-label{display:block;font-size:.6875rem;color:var(--text-mut);margin-bottom:4px;text-transform:uppercase;letter-spacing:1px;font-weight:600}
.spec-value{font-family:var(--font-d);font-size:1rem;font-weight:800;color:var(--accent)}

/* Detail Panels */
.product-detail{margin-top:0;border-top:1px solid var(--border);padding-top:20px}
.detail-header{display:flex;justify-content:space-between;align-items:center;padding:12px 0;cursor:pointer;transition:all var(--tr)}
.detail-header:hover h4{color:var(--accent)}
.detail-header h4{font-family:var(--font-d);font-size:1rem;font-weight:700;color:var(--text-pri);transition:color var(--tr)}
.detail-toggle{width:32px;height:32px;display:flex;align-items:center;justify-content:center;border-radius:50%;background:var(--bg-dark);border:1px solid var(--border);color:var(--text-sec);font-size:.875rem;transition:transform var(--tr)}
.detail-header.open .detail-toggle{transform:rotate(180deg);background:var(--accent-dim);color:var(--accent);border-color:var(--border-accent)}
.detail-body{max-height:0;overflow:hidden;transition:max-height .6s var(--ease)}
.detail-body.open{max-height:3000px}
.detail-body-inner{padding:16px 0 0}
.param-table{width:100%;border-collapse:collapse;font-size:.8125rem;background:var(--bg-dark);border-radius:var(--r-sm);overflow:hidden}
.param-table th{background:rgba(255,42,42,.08);color:var(--accent);padding:12px 16px;text-align:left;font-weight:700;border-bottom:1px solid rgba(255,42,42,.1);white-space:nowrap}
.param-table td{padding:12px 16px;border-bottom:1px solid var(--border);color:var(--text-sec)}
.param-table tr:hover td{background:rgba(255,42,42,.03)}
.param-table .param-key{color:var(--text-pri);font-weight:600;white-space:nowrap;width:30%}
.param-table .param-val{color:var(--text-sec);line-height:1.6}
.param-table .param-highlight{color:var(--text-white);font-weight:700}

/* ---------- CAPABILITIES ---------- */
.capabilities{background:var(--bg-alt)}
.capabilities-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:24px}
.capability-card{padding:36px;border-radius:var(--r);background:var(--bg-card);border:1px solid var(--border);text-align:center;transition:all var(--tr);position:relative;overflow:hidden}
.capability-card::before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:var(--gradient);transform:scaleX(0);transition:transform var(--tr);transform-origin:center}
.capability-card:hover{border-color:var(--border-accent);background:var(--bg-dark);transform:translateY(-4px);box-shadow:var(--shadow-glow)}
.capability-card:hover::before{transform:scaleX(1)}
.capability-icon{width:64px;height:64px;display:flex;align-items:center;justify-content:center;border-radius:50%;background:rgba(255,255,255,0.03);border:1px solid var(--border);font-size:1.75rem;margin:0 auto 20px;transition:all var(--tr);color:var(--accent)}
.capability-card:hover .capability-icon{background:var(--accent-dim);border-color:var(--border-accent);transform:scale(1.1);box-shadow:var(--accent-glow)}
.capability-card h3{font-family:var(--font-d);font-size:1.125rem;font-weight:700;color:var(--text-white);margin-bottom:12px}
.capability-card p{font-size:.875rem;color:var(--text-sec);line-height:1.7}

/* ---------- CONTACT ---------- */
.contact{background:var(--bg-dark);border-top:1px solid var(--border)}
.contact-grid{display:grid;grid-template-columns:1fr 1.2fr;gap:48px;align-items:start}
.contact-info-panel,.contact-form-panel{padding:40px;border-radius:var(--r);background:var(--bg-card);border:1px solid var(--border)}
.contact-subtitle{font-family:var(--font-d);font-size:1.25rem;font-weight:800;color:var(--text-white);margin-bottom:32px;padding-bottom:16px;border-bottom:1px solid rgba(255,255,255,0.05)}
.contact-item{padding:16px 0;border-bottom:1px solid rgba(255,255,255,0.05);display:flex;flex-direction:column;gap:6px}
.contact-item:last-child{border-bottom:none}
.contact-label{font-size:.6875rem;color:var(--text-mut);text-transform:uppercase;letter-spacing:2px;font-weight:700}
.contact-value{font-size:1rem;color:var(--text-pri);font-weight:600}
.contact-notes{margin-top:24px;padding:24px;border-radius:var(--r-sm);background:var(--accent-dim);border:1px solid var(--border-accent);border-left:4px solid var(--accent)}
.contact-notes p{font-size:.875rem;color:var(--text-white);line-height:1.7;font-weight:500}
.form-group{margin-bottom:20px}
.form-group label{display:block;font-size:.8125rem;font-weight:600;color:var(--text-sec);margin-bottom:8px}
.form-group input,.form-group select,.form-group textarea{width:100%;padding:14px 16px;border-radius:var(--r-sm);border:1px solid var(--border);background:var(--bg-dark);color:var(--text-white);font-size:.9375rem;transition:all var(--tr)}
.form-group input::placeholder,.form-group textarea::placeholder{color:var(--text-mut)}
.form-group select{appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='rgba(255,255,255,0.4)' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10z'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 16px center;padding-right:40px}
.form-group select option{background:var(--bg-dark);color:var(--text-white)}
.form-group input:focus,.form-group select:focus,.form-group textarea:focus{outline:none;border-color:var(--accent);background:rgba(255,255,255,0.02)}
.submit-btn{width:100%;padding:16px;border-radius:var(--r-sm);background:var(--gradient);color:#fff;font-size:1.0625rem;font-weight:700;border:none;cursor:pointer;transition:all var(--tr);letter-spacing:1px;text-transform:uppercase}
.submit-btn:hover{box-shadow:var(--accent-glow);transform:translateY(-2px)}
.form-status{margin-top:16px;font-size:.875rem;color:var(--green);text-align:center;min-height:24px;font-weight:500}

/* ---------- FOOTER ---------- */
.footer{background:var(--bg-darker);border-top:1px solid rgba(255,255,255,0.03);padding:60px 0 40px}
.footer-content{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:24px;padding-bottom:40px;margin-bottom:40px;border-bottom:1px solid rgba(255,255,255,0.05)}
.footer-brand{display:flex;flex-direction:column;gap:6px}
.footer-brand-name{font-family:var(--font-d);font-size:1.375rem;font-weight:800;color:var(--text-white);letter-spacing:1px}
.footer-brand-en{font-size:.6875rem;color:var(--accent);letter-spacing:2px;text-transform:uppercase;font-weight:700}
.footer-links{display:flex;gap:32px}
.footer-links a{font-size:.875rem;font-weight:500;color:var(--text-sec);transition:color var(--tr)}
.footer-links a:hover{color:var(--text-white)}
.footer-bottom{text-align:center;display:flex;flex-direction:column;gap:8px}
.footer-bottom p{font-size:.75rem;color:var(--text-mut);letter-spacing:1px}

/* ---------- SCROLL REVEAL ---------- */
.reveal{opacity:0;transform:translateY(30px);transition:opacity .8s var(--ease),transform .8s var(--ease)}
.reveal.is-visible{opacity:1;transform:translateY(0)}
.reveal-delay-1{transition-delay:.15s}
.reveal-delay-2{transition-delay:.3s}
.reveal-delay-3{transition-delay:.45s}

/* ---------- RESPONSIVE ---------- */
@media(max-width:1024px){
    .about-grid{grid-template-columns:1fr;gap:48px}
    .contact-grid{grid-template-columns:1fr}
    .stats-grid{grid-template-columns:repeat(2,1fr)}
    .philosophy-values{grid-template-columns:repeat(3,1fr)}
}
@media(max-width:768px){
    :root{--sec-pad:80px}
    .hero{min-height:100svh}
    .hero-title{font-size:32px}
    .stats-grid{grid-template-columns:repeat(2,1fr);gap:16px}
    .philosophy-values{grid-template-columns:1fr}
    .products-grid{grid-template-columns:1fr}
    .about-cards{grid-template-columns:1fr}
    .capabilities-grid{grid-template-columns:1fr 1fr}
    .hero-scroll{display:none}
    /* Mobile nav */
    .nav-toggle{display:flex}
    .nav-links{
        position:fixed;top:0;right:-100%;width:280px;height:100vh;
        flex-direction:column;align-items:flex-start;gap:0;
        background:var(--bg-card);padding:80px 24px 32px;
        transition:right .35s cubic-bezier(.4,0,.2,1);
        z-index:1000;overflow-y:auto;
        border-left:1px solid var(--border);
        box-shadow:-8px 0 32px rgba(0,0,0,.5)
    }
    body.nav-open .nav-links{right:0}
    .nav-links a{width:100%;padding:14px 16px;font-size:1rem;border-radius:var(--r-sm)}
    .nav-links a::after{display:none}
    .nav-consult{width:100%;text-align:center;margin-top:12px}
    .nav-right{gap:8px}
    .lang-btn{padding:6px 12px;font-size:.7rem}
}
@media(max-width:480px){
    :root{--sec-pad:60px;--nav-h:64px}
    .capabilities-grid{grid-template-columns:1fr}
    .product-specs{grid-template-columns:1fr}
    .footer-content{flex-direction:column;text-align:center}
}
/* ===== BACK TO TOP ===== */
.back-to-top{
    position:fixed;bottom:32px;right:32px;z-index:900;
    width:44px;height:44px;border-radius:50%;border:none;cursor:pointer;
    background:linear-gradient(135deg,var(--accent) 0%,#a00 100%);
    color:#fff;display:flex;align-items:center;justify-content:center;
    box-shadow:0 4px 16px rgba(255,42,42,0.35);
    opacity:0;visibility:hidden;
    transform:translateY(12px);
    transition:opacity .3s,visibility .3s,transform .3s;
}
.back-to-top.is-visible{opacity:1;visibility:visible;transform:translateY(0)}
.back-to-top:hover{background:linear-gradient(135deg,#ff5555 0%,var(--accent) 100%);box-shadow:0 6px 20px rgba(255,42,42,0.5)}
@media(max-width:480px){.back-to-top{bottom:20px;right:16px}}

/* ===== SVG ICON ADJUSTMENTS ===== */
.about-card-icon svg,.highlight-icon svg{display:block}
.capability-icon svg,.product-icon svg{display:block}

@media(prefers-reduced-motion:reduce){
    *,*::before,*::after{animation-iteration-count:1!important;transition-duration:.01ms!important}
    .reveal{opacity:1;transform:none}
    html{scroll-behavior:auto}
}