:root{--brand: #7c6ff0;--brand-soft: rgba(124, 111, 240, .12);--brand-line: rgba(124, 111, 240, .3);--bg: #f4f5fb;--panel: #ffffff;--panel-2: #f3f4f9;--line: #e6e8f0;--text-1: #2b2f3a;--text-2: #8a90a2;--gutter: clamp(16px, 4vw, 56px);--shell: 1120px;--shadow-card: 0 6px 20px rgba(20, 24, 46, .06)}:root[data-theme=dark]{--bg: #14151b;--panel: #1d1f27;--panel-2: #24262f;--line: #2f323c;--text-1: #e6e8ee;--text-2: #9aa0b0;--brand-soft: rgba(124, 111, 240, .18);--shadow-card: 0 6px 20px rgba(0, 0, 0, .28)}*{box-sizing:border-box}html,body{margin:0;padding:0}body{font-family:-apple-system,PingFang SC,Microsoft YaHei,Segoe UI,sans-serif;background:var(--bg);color:var(--text-1);-webkit-font-smoothing:antialiased}#qimen-root{min-height:40vh}.nav{display:flex;align-items:center;justify-content:space-between;padding:14px var(--gutter);color:#fff;background:linear-gradient(120deg,#0b1a3a,#1b1740)}.nav__logo{font-size:18px;font-weight:800;letter-spacing:2px;color:#fff;text-decoration:none}.nav__theme{border:1px solid rgba(255,255,255,.25);background:#ffffff14;color:#fff;padding:6px 14px;border-radius:999px;cursor:pointer}.container{max-width:calc(var(--shell) + var(--gutter) * 2);margin:0 auto;padding:28px var(--gutter) 64px}.tool-intro{max-width:760px;margin:0 auto 20px}.tool-intro h1{font-size:32px;margin:0 0 10px;letter-spacing:4px}.tool-intro p{color:var(--text-2);line-height:1.9;margin:0}.tool-faq{max-width:760px;margin:32px auto 0;border-top:1px solid var(--line);padding-top:20px}.tool-faq h2{font-size:20px;margin:0 0 12px}.tool-faq h3{font-size:15px;margin:16px 0 6px;color:var(--brand)}.tool-faq p{font-size:14px;line-height:1.9;color:var(--text-1);margin:0 0 8px}.tool-faq a{color:var(--brand)}.modal.modal--hidden{display:none}.modal{position:fixed;top:0;right:0;bottom:0;left:0;z-index:1000;display:flex;align-items:flex-start;justify-content:center;padding:max(6vh,48px) var(--gutter) 32px;background:#0f122680;-webkit-backdrop-filter:blur(3px);backdrop-filter:blur(3px);overflow-y:auto}.modal__panel{position:relative;width:100%;max-width:460px;animation:modal-in .2s ease}.modal__close{position:absolute;top:-38px;right:0;width:30px;height:30px;border-radius:50%;border:1px solid rgba(255,255,255,.35);background:#ffffff1f;color:#fff;font-size:18px;line-height:1;cursor:pointer}.modal__close:hover{background:#ffffff40}@keyframes modal-in{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}.form-card{border:1px solid var(--line);border-radius:14px;padding:18px;background:var(--panel);box-shadow:0 8px 24px #0000000f}.form-card__head{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}.form-card__head 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14px;border-radius:6px;cursor:pointer}.toast{position:fixed;top:24px;left:50%;transform:translate(-50%);z-index:9999;padding:10px 20px;border-radius:8px;background:#2b2f3a;color:#fff;font-size:14px;box-shadow:0 8px 24px #0003;animation:toast-in .2s ease}@keyframes toast-in{0%{opacity:0;transform:translate(-50%,-8px)}to{opacity:1;transform:translate(-50%)}}