.back-top-btn{z-index:999;background:var(--primary);color:#fff;opacity:0;visibility:hidden;cursor:pointer;border:none;border-radius:50%;justify-content:center;align-items:center;width:48px;height:48px;transition:opacity .3s,transform .3s,visibility .3s;display:flex;position:fixed;bottom:2rem;right:2rem;transform:translateY(12px);box-shadow:0 4px 16px #1a5c3459}.back-top-btn.visible{opacity:1;visibility:visible;transform:translateY(0)}.back-top-btn:hover{background:var(--primary-hover);transform:translateY(-3px);box-shadow:0 6px 22px #1a5c3480}@media (width<=768px){.back-top-btn{width:42px;height:42px;bottom:1.25rem;right:1rem}}:root{--primary:#1a5c34;--primary-hover:#2d8a4e;--primary-light:#e8f5e9;--primary-dark:#0f3a1f;--secondary:#c8943e;--secondary-light:#e8c36a;--dark:#14160f;--dark-light:#21241a;--light:#f7f8f6;--text-main:#363a2f;--text-muted:#6b705c;--border-color:#e0e2db;--glass-bg:#fffc;--glass-border:#ffffff80;--shadow-sm:0 1px 2px #0000000d;--shadow-md:0 4px 6px -1px #00000012, 0 2px 4px -2px #0000000d;--shadow-lg:0 10px 15px -3px #00000014, 0 4px 6px -4px #0000000a;--shadow-xl:0 20px 25px -5px #0000001a, 0 8px 10px -6px #0000000a;--font-sans:"PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--transition:all .3s cubic-bezier(.4, 0, .2, 1);--header-height:4.5rem}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth;scroll-padding-top:var(--header-height);font-size:16px}body{font-family:var(--font-sans);color:var(--text-main);-webkit-font-smoothing:antialiased;background-color:#fafdfb;line-height:1.6;overflow-x:hidden}img,video{max-width:100%;height:auto;display:block}a{color:inherit;text-decoration:none;transition:color .15s}ul,ol{list-style:none}button,input,textarea,select{font:inherit;color:inherit;background:0 0;border:none;outline:none}button{cursor:pointer}::-webkit-scrollbar{width:8px}::-webkit-scrollbar-track{background:#f1f5f9}::-webkit-scrollbar-thumb{background:#cbd5e1;border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--primary)}h1,h2,h3,h4,h5,h6{color:var(--dark);font-weight:700;line-height:1.3}h1{font-size:clamp(2.25rem,5vw,3.75rem)}h2{font-size:clamp(1.75rem,3.5vw,2.5rem)}h3{font-size:clamp(1.25rem,2.5vw,1.75rem)}.container{max-width:1280px;margin:0 auto;padding:0 2rem}section{padding:6rem 0}.section-header{text-align:center;margin-bottom:4rem}.section-header .label{letter-spacing:.15em;text-transform:uppercase;color:var(--primary);background:var(--primary-light);border-radius:9999px;margin-bottom:1rem;padding:.25rem 1rem;font-size:.875rem;font-weight:600;display:inline-block}.section-header h2{margin-bottom:.75rem}.section-header .subtitle{color:var(--text-muted);max-width:640px;margin:0 auto;font-size:1.1rem}.section-alt{background-color:var(--light)}.section-title{text-align:center;color:var(--dark);margin-bottom:1rem;font-size:2.5rem;font-weight:700}.section-title:after{content:"";background:linear-gradient(90deg, var(--primary), var(--secondary));border-radius:2px;width:60px;height:4px;margin:.8rem auto 0;display:block}.section-subtitle{text-align:center;color:var(--text-muted);max-width:650px;margin:0 auto 3rem;font-size:1.1rem}.glass-panel{background:var(--glass-bg);-webkit-backdrop-filter:blur(16px);border:1px solid var(--glass-border);box-shadow:var(--shadow-lg);border-radius:1rem}.btn{cursor:pointer;transition:var(--transition);white-space:nowrap;border-radius:9999px;justify-content:center;align-items:center;gap:.5rem;padding:.8rem 1.8rem;font-size:.95rem;font-weight:600;text-decoration:none;display:inline-flex}.btn-primary{background:linear-gradient(135deg, var(--primary), #2d8a4e);color:#fff;box-shadow:0 4px 14px #1a5c3459}.btn-primary:hover{transform:translateY(-2px);box-shadow:0 6px 20px #1a5c3480}.btn-secondary{color:var(--dark);border:2px solid var(--primary);box-shadow:var(--shadow-sm);background:#fff}.btn-secondary:hover{background:var(--primary);color:#fff;box-shadow:var(--shadow-md);transform:translateY(-2px)}.btn-accent{background:linear-gradient(135deg, var(--secondary), var(--secondary-light));color:#fff;box-shadow:0 4px 14px #c8943e59}.btn-accent:hover{transform:translateY(-2px);box-shadow:0 6px 20px #c8943e80}.gradient-text{background:linear-gradient(135deg, var(--primary), var(--secondary));-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text}.reveal{opacity:0;transition:opacity .7s cubic-bezier(.4,0,.2,1),transform .7s cubic-bezier(.4,0,.2,1);transform:translateY(30px)}.reveal.visible{opacity:1;transform:translateY(0)}@keyframes fadeInUp{0%{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}@keyframes pulse-soft{0%,to{opacity:.8;transform:scale(1)}50%{opacity:1;transform:scale(1.05)}}@keyframes float{0%,to{transform:translateY(0)}50%{transform:translateY(-10px)}}.animate-fade-in{animation:.8s ease-out forwards fadeInUp}@media (width<=768px){:root{--header-height:3.75rem}section{padding:4rem 0}.section-title{font-size:2rem}.section-header{margin-bottom:2.5rem}.container{padding:0 1rem}}