:root{--color-primary: #ea580c;--color-primary-light: #f97316;--color-primary-dark: #c2410c;--color-primary-soft: #fff7ed;--color-accent: #fbbf24;--color-bg: #fafaf9;--color-surface: #ffffff;--color-text: #1c1917;--color-text-muted: #78716c;--color-border: #e7e5e4;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .04);--shadow-md: 0 4px 16px rgba(0, 0, 0, .06);--shadow-lg: 0 12px 32px rgba(0, 0, 0, .08);--radius: 6px;--radius-lg: 10px;--header-height: 64px;--container: 1180px}*,*:before,*:after{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,PingFang SC,Microsoft YaHei,Segoe UI,sans-serif;color:var(--color-text);background:var(--color-bg);line-height:1.6;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}img{max-width:100%;display:block}button,input,textarea,select{font:inherit}.container{width:min(100% - 32px,var(--container));margin-inline:auto}.section{padding:72px 0}.section--alt{background:var(--color-surface)}.section--warm{background:var(--color-primary-soft)}.section-header{margin-bottom:48px}.section-header--center{text-align:center;max-width:680px;margin-inline:auto}.section-title{margin:0 0 12px;font-size:clamp(1.6rem,3vw,2.1rem);font-weight:700;letter-spacing:-.02em;line-height:1.25}.section-desc{margin:0;color:var(--color-text-muted);font-size:1rem;line-height:1.7}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:10px 22px;border-radius:var(--radius);border:none;cursor:pointer;font-weight:600;font-size:.92rem;transition:background .2s,box-shadow .2s,transform .15s}.btn:hover{transform:translateY(-1px)}.btn--lg{padding:13px 26px;font-size:.95rem}.btn--primary{background:var(--color-primary);color:#fff;box-shadow:0 2px 8px #ea580c40}.btn--primary:hover{background:var(--color-primary-dark);box-shadow:0 4px 12px #ea580c4d}.btn--ghost{background:rgba(255,255,255,.1);color:#fff;border:1px solid rgba(255,255,255,.3)}.btn--ghost:hover{background:rgba(255,255,255,.18)}.btn--white-outline{background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.6)}.btn--white-outline:hover{background:rgba(255,255,255,.1);border-color:#fff}.btn--outline{background:transparent;color:var(--color-primary);border:1.5px solid var(--color-primary)}.btn--outline:hover{background:var(--color-primary-soft)}.card-grid{display:grid;gap:20px;grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}.card-grid--3{grid-template-columns:repeat(3,1fr)}@keyframes fadeIn{0%{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}@keyframes slideUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@media (max-width: 900px){.card-grid--3{grid-template-columns:repeat(2,1fr)}}@media (max-width: 768px){.section{padding:56px 0}.section-header{margin-bottom:36px}.card-grid--3{grid-template-columns:1fr}}