:root{--bg: #f3f9ff;--surface: #ffffff;--surface-soft: #f7fbff;--text: #0f2940;--text-muted: #5a738e;--line: #d4e6f5;--brand: #0ea5e9;--brand-deep: #0b7fb3;--accent: #ff8a3d;--radius-lg: 18px;--radius-md: 12px;--shadow-card: 0 16px 38px rgba(11, 95, 140, .12);--shadow-soft: 0 6px 18px rgba(11, 95, 140, .09)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Avenir Next,Segoe UI,PingFang SC,Hiragino Sans GB,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background:radial-gradient(circle at 10% 0%,#d5efff 0%,transparent 32%),radial-gradient(circle at 90% 20%,#ffe8d8 0%,transparent 28%),linear-gradient(165deg,#eef8ff,#f8fbff 60%,#f4fbff);min-height:100vh;padding:24px;color:var(--text)}.app{max-width:1160px;margin:0 auto;border-radius:26px;overflow:hidden;background:linear-gradient(180deg,#fffffff0,#fff);box-shadow:0 28px 70px #0b5f8c29;border:1px solid rgba(255,255,255,.65)}.header{position:relative;padding:28px 34px 42px;background:radial-gradient(circle at top right,rgba(14,165,233,.18) 0%,transparent 35%),linear-gradient(120deg,#dff3ff,#eff8ff 42%,#fff8f2);border-bottom:1px solid var(--line)}.header-inner{display:flex;justify-content:space-between;align-items:center}.brand-mark{font-size:.82rem;font-weight:800;letter-spacing:.22em;color:#fff;background:linear-gradient(135deg,var(--brand),#13b6b8);border-radius:999px;padding:8px 14px;box-shadow:var(--shadow-soft)}.github-link{display:inline-flex;align-items:center;gap:8px;text-decoration:none;font-weight:700;color:var(--brand-deep);background:#ffffffd1;border:1px solid #bfe3f7;border-radius:999px;padding:10px 16px;transition:transform .2s ease,background-color .2s ease,border-color .2s ease}.github-link:hover{transform:translateY(-1px);border-color:#90d6f6;background:#fff}.hero{margin-top:28px;max-width:760px}.hero-kicker{display:inline-flex;font-size:.82rem;font-weight:800;letter-spacing:.12em;text-transform:uppercase;color:#0b7fb3;background:#0ea5e921;padding:7px 12px;border-radius:999px;margin-bottom:16px}.hero-title{font-size:clamp(2.2rem,6vw,3.3rem);line-height:1.08;letter-spacing:-.03em;margin-bottom:14px}.hero-subtitle{font-size:1.06rem;line-height:1.7;color:var(--text-muted);max-width:62ch}.hero-meta{margin-top:18px;display:inline-block;background:#0f294014;color:#255475;font-family:SF Mono,Menlo,Consolas,monospace;font-size:.86rem;padding:7px 12px;border-radius:8px}.demo-input-container{margin-top:24px;width:100%}.demo-input{width:100%;padding:14px 18px;font-size:1rem;border-radius:var(--radius-md);border:2px solid var(--line);background:var(--surface);color:var(--text);outline:none;transition:border-color .2s ease,box-shadow .2s ease;box-shadow:var(--shadow-soft)}.demo-input:focus{border-color:var(--brand);box-shadow:0 0 0 4px #0ea5e91f}.main{padding:34px}.feature-grid{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:18px}.section{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);padding:22px;box-shadow:var(--shadow-soft)}.section-highlight{grid-column:span 6}.section-wide{grid-column:span 12}.copy-showcase{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(280px,.8fr);gap:20px;align-items:center;background:radial-gradient(circle at right top,rgba(255,138,61,.18) 0%,transparent 35%),linear-gradient(135deg,#f8fcff,#eef8ff 54%,#fff7f1)}.copy-showcase-copy{display:grid;gap:12px}.copy-showcase-kicker{display:inline-flex;width:fit-content;padding:6px 10px;border-radius:999px;background:#0ea5e91f;color:var(--brand-deep);font-size:.8rem;font-weight:800;letter-spacing:.08em;text-transform:uppercase}.copy-showcase-text{color:#214863;line-height:1.8;font-size:1rem}.copy-showcase-note{color:var(--text-muted);font-size:.95rem}.copy-showcase-media{display:flex;justify-content:center}.preview-image{width:100%;max-width:420px;border-radius:20px;border:1px solid rgba(15,41,64,.08);box-shadow:0 22px 45px #0b5f8c2e;background:#dff3ff}.section h2{font-size:1.28rem;margin-bottom:14px;color:#123550}.section-intro{color:var(--text-muted);margin-bottom:14px}.card{background:linear-gradient(165deg,var(--surface-soft) 0%,#ffffff 100%);border-radius:var(--radius-md);padding:18px;margin-bottom:12px;border:1px solid #dcecf8;transition:transform .2s ease,box-shadow .2s ease}.card:hover{transform:translateY(-2px);box-shadow:var(--shadow-card)}.card h3{font-size:1.22rem;color:#164765;margin-bottom:8px}.count{font-size:2rem;font-weight:800;color:var(--brand-deep);margin:14px 0}.button{background:linear-gradient(135deg,var(--brand),#0ec6e9);color:#fff;border:none;padding:12px 18px;font-size:.95rem;font-weight:700;border-radius:10px;cursor:pointer;transition:transform .2s ease,box-shadow .2s ease;box-shadow:0 8px 16px #0ea5e947;margin-right:8px}.button:hover{transform:translateY(-1px);box-shadow:0 10px 20px #0ea5e954}.button:active{transform:translateY(0)}.button-secondary{background:linear-gradient(135deg,#ff9f55,var(--accent));box-shadow:0 8px 16px #ff8a3d47}.button-secondary:hover{box-shadow:0 10px 20px #ff8a3d57}.dialog-overlay{position:fixed;inset:0;background:#0a223570;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;z-index:1000;padding:16px}.dialog{background:#fff;border-radius:16px;padding:28px;max-width:520px;width:100%;box-shadow:0 24px 66px #052d4861;border:1px solid #d5eaf8}.dialog h3{font-size:1.4rem;color:#143f5b;margin-bottom:12px}.dialog p{color:#516f85;line-height:1.7;margin-bottom:18px}.list{list-style:none;display:grid;gap:10px}.list-item{display:flex;align-items:center;padding:14px 16px;background:linear-gradient(120deg,#f4fbff,#fffdfa);border-radius:10px;border:1px solid #dcecf8;transition:transform .2s ease,border-color .2s ease}.list-item:before{content:"";width:8px;height:8px;border-radius:50%;background:linear-gradient(135deg,var(--brand),var(--accent));margin-right:10px}.list-item:hover{transform:translate(3px);border-color:#b4ddf6}.footer{background:#f7fbff;padding:22px 34px;text-align:center;color:#4f6e84;border-top:1px solid #d6e9f7}.footer code{background:#e9f4fc;padding:5px 8px;border-radius:6px;margin-left:8px;font-family:SF Mono,Menlo,Consolas,monospace;color:#0f7eb2;font-weight:700}@media(max-width:900px){.section-highlight,.section-wide{grid-column:span 12}.copy-showcase{grid-template-columns:1fr}.main{padding:20px}.header{padding:22px 20px 30px}}@media(max-width:640px){body{padding:10px}.hero-title{font-size:1.9rem}.hero-subtitle{font-size:.95rem}.section{padding:16px}.footer{padding:18px}.footer code{display:block;margin-top:8px;margin-left:0}}