:root{--color-primary:#4b84ff;--color-primary-dark:#2d63e1;--color-text:#1f2937;--color-text-soft:#5f6b7a;--color-border:#e8edf5;--color-bg:#f5f7fb;--color-surface:#fff;--color-surface-soft:#f0f4fb;--color-footer:#182437;--shadow-soft:0 18px 48px rgba(27,59,122,.08);--radius-xl:28px;--radius-lg:22px;--radius-md:16px;--radius-sm:12px}*{box-sizing:border-box}html{overflow-y:scroll;scroll-behavior:smooth}body{background:var(--color-bg);color:var(--color-text);font-family:Segoe UI,PingFang SC,Microsoft YaHei,sans-serif;margin:0}a{color:inherit;text-decoration:none}button,input,select,textarea{font:inherit}img{display:block;max-width:100%}.app-container{margin:0 auto;width:min(1200px,calc(100% - 30px))}.section-card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);box-shadow:var(--shadow-soft)}.section-shell{padding:84px 0}.pill-button{align-items:center;border:1px solid transparent;border-radius:999px;cursor:pointer;display:inline-flex;font:inherit;gap:8px;justify-content:center;min-height:46px;padding:0 22px;transition:.2s ease}.pill-button--primary{background:linear-gradient(135deg,var(--color-primary),#67a0ff);color:#fff}.pill-button--primary:hover{box-shadow:0 12px 30px #4b84ff47;transform:translateY(-1px)}.pill-button--secondary{background:#fff;border-color:#4b84ff33;color:var(--color-primary)}.pill-button--secondary:hover{background:#f7faff;border-color:#4b84ff73}@media(max-width:900px){.section-shell{padding:64px 0}}@media(max-width:640px){.app-container{width:min(1120px,calc(100% - 24px))}}