:root{--color-primary:#1a6db5;--color-primary-dark:#145a94;--color-primary-light:#2a8fd4;--color-accent:#00a8e8;--color-accent-green:#4caf50;--bg-white:#fff;--bg-light:#f5f7fa;--bg-dark-overlay:#0009;--text-primary:#333;--text-secondary:#666;--text-muted:#999;--text-white:#fff;--text-blue:#1a6db5;--border-light:#e8e8e8;--border-blue:#1a6db5;--font-family:"Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", sans-serif;--font-size-xs:12px;--font-size-sm:14px;--font-size-base:16px;--font-size-lg:18px;--font-size-xl:24px;--font-size-2xl:32px;--font-size-3xl:48px;--space-xs:8px;--space-sm:16px;--space-md:24px;--space-lg:32px;--space-xl:48px;--space-2xl:64px;--space-3xl:80px;--container-max:1200px;--container-padding:20px}*{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{font-family:var(--font-family);font-size:var(--font-size-base);color:var(--text-primary);background-color:var(--bg-white);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;line-height:1.6}a{color:inherit;text-decoration:none}ul,ol{list-style:none}img{max-width:100%;height:auto;display:block}.container{max-width:var(--container-max);padding:0 var(--container-padding);margin:0 auto}.section-title-en{font-size:var(--font-size-3xl);color:#e8e8e8;text-align:center;letter-spacing:4px;font-weight:700;line-height:1}.section-title-cn{font-size:var(--font-size-2xl);color:var(--color-primary);text-align:center;margin-top:var(--space-xs);font-weight:700}.btn-primary{background-color:var(--color-primary);color:var(--text-white);font-size:var(--font-size-base);cursor:pointer;border:none;padding:12px 40px;transition:background-color .3s;display:inline-block}.btn-primary:hover{background-color:var(--color-primary-dark)}.btn-outline{color:var(--text-white);font-size:var(--font-size-base);border:1px solid var(--text-white);cursor:pointer;background-color:#0000;padding:10px 30px;transition:all .3s;display:inline-block}.btn-outline:hover{background-color:var(--text-white);color:var(--color-primary)}