:root{--bg: #0b0b0f;--bg-soft: #14141b;--card: #16161f;--border: #262633;--text: #f4f4f6;--muted: #9a9aa8;--accent: #ffd60a;--accent-ink: #1a1400;--radius: 16px;--maxw: 960px;--font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Roboto, Helvetica, Arial, sans-serif}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:var(--font);line-height:1.65;-webkit-font-smoothing:antialiased}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}main{min-height:60vh}.site-header{display:flex;align-items:center;justify-content:space-between;gap:16px;max-width:var(--maxw);margin:0 auto;padding:20px 24px;flex-wrap:wrap}.brand{display:inline-flex;align-items:center;gap:10px;font-weight:700;font-size:1.15rem;color:var(--text)}.brand:hover{text-decoration:none}.nav{display:flex;align-items:center;gap:20px;flex-wrap:wrap}.nav a{color:var(--muted);font-size:.95rem}.nav a:hover{color:var(--text);text-decoration:none}.lang-switch{display:inline-flex;align-items:center;border:1px solid var(--border);border-radius:999px;padding:2px;gap:2px}.lang-switch a{color:var(--muted);font-size:.85rem;line-height:1;padding:5px 11px;border-radius:999px}.lang-switch a:hover{color:var(--text);text-decoration:none}.lang-switch a.is-active{background:var(--accent);color:var(--accent-ink);font-weight:600}.lang-switch a.is-active:hover{color:var(--accent-ink)}.hero{max-width:var(--maxw);margin:0 auto;padding:72px 24px 48px;text-align:center}.hero h1{font-size:clamp(2.4rem,6vw,3.6rem);line-height:1.05;margin:0 0 16px;letter-spacing:-.02em}.hero .lede{font-size:clamp(1.05rem,2.4vw,1.3rem);color:var(--muted);max-width:620px;margin:0 auto 32px}.badge{display:inline-block;background:var(--accent);color:var(--accent-ink);font-weight:700;padding:14px 26px;border-radius:999px}.badge:hover{text-decoration:none;opacity:.92}.badge.disabled{background:var(--bg-soft);color:var(--muted);border:1px solid var(--border);cursor:default}.hero .sub{display:block;margin-top:14px;color:var(--muted);font-size:.9rem}.section{max-width:var(--maxw);margin:0 auto;padding:40px 24px}.section h2{font-size:1.6rem;margin:0 0 28px;text-align:center}.features{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:18px}.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:24px}.card .icon{display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;border-radius:12px;background:var(--bg-soft);border:1px solid var(--border);color:var(--accent)}.card .icon svg{width:24px;height:24px}.card h3{margin:12px 0 8px;font-size:1.1rem}.card p{margin:0;color:var(--muted);font-size:.95rem}.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:18px;counter-reset:step}.step{background:var(--bg-soft);border:1px solid var(--border);border-radius:var(--radius);padding:24px}.step .n{display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;border-radius:999px;background:var(--accent);color:var(--accent-ink);font-weight:700;margin-bottom:12px}.step p{margin:0;color:var(--muted)}.step strong{color:var(--text);display:block;margin-bottom:4px}.prose{max-width:760px;margin:0 auto;padding:48px 24px 24px}.prose h1{font-size:2rem;margin:0 0 8px}.prose .updated{color:var(--muted);font-size:.9rem;margin:0 0 32px}.prose h2{font-size:1.25rem;margin:36px 0 12px}.prose p,.prose li{color:#d9d9e2}.prose ul{padding-left:22px}.prose li{margin:6px 0}.prose a{word-break:break-word}.form-page{max-width:620px;margin:0 auto;padding:48px 24px 24px}.form-page h1{font-size:2rem;margin:0 0 12px}.lede-sm{color:var(--muted);margin:0 0 28px}#feedback-form{display:flex;flex-direction:column;gap:20px}.field{display:flex;flex-direction:column;gap:8px}.field label{font-weight:600;font-size:.95rem}.field .optional{color:var(--muted);font-weight:400}.field textarea,.field input{width:100%;background:var(--bg-soft);border:1px solid var(--border);border-radius:12px;color:var(--text);font:inherit;padding:12px 14px;resize:vertical}.field textarea:focus,.field input:focus{outline:none;border-color:var(--accent)}.field input::placeholder,.field textarea::placeholder{color:var(--muted)}.context-note{color:var(--muted);font-size:.85rem;margin:0;word-break:break-word}#submit-btn{align-self:flex-start;background:var(--accent);color:var(--accent-ink);font:inherit;font-weight:700;border:none;border-radius:999px;padding:13px 28px;cursor:pointer}#submit-btn:hover{opacity:.92}#submit-btn:disabled{opacity:.55;cursor:default}.form-status{margin:0;color:#ff9b9b;font-size:.9rem;min-height:1.2em}.thank-you{max-width:620px;margin:0 auto;padding:24px;text-align:center}.thank-you h2{font-size:1.4rem;margin:0 0 8px}.thank-you p{color:var(--muted);margin:0}.site-footer{border-top:1px solid var(--border);margin-top:64px;padding:40px 24px}.footer-cols{max-width:var(--maxw);margin:0 auto;display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap}.footer-brand{font-weight:700;font-size:1.05rem}.footer-links{display:flex;gap:18px;flex-wrap:wrap;align-items:center}.footer-links a{color:var(--muted);font-size:.92rem}.footer-bottom{max-width:var(--maxw);margin:28px auto 0;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;font-size:.85rem}.muted{color:var(--muted)}.footer-lang{max-width:var(--maxw);margin:24px auto 0;display:flex;align-items:center;gap:12px;flex-wrap:wrap;font-size:.85rem}.section-carousel{padding-top:8px}.carousel{max-width:880px;margin:0 auto}.carousel-viewport{position:relative;aspect-ratio:16 / 9;border-radius:var(--radius);overflow:hidden;border:1px solid var(--border);background:#000}.carousel-slide{position:absolute;inset:0;margin:0;opacity:0;visibility:hidden;transition:opacity .5s ease}.carousel-slide.is-active{opacity:1;visibility:visible}.carousel-slide img{width:100%;height:100%;object-fit:cover;display:block}.carousel-slide figcaption{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.carousel-arrow{position:absolute;top:50%;transform:translateY(-50%);width:44px;height:44px;display:flex;align-items:center;justify-content:center;border:none;border-radius:999px;background:#0a0a0f8c;color:#fff;cursor:pointer;opacity:0;transition:opacity .2s ease,background .2s ease}.carousel-arrow svg{width:22px;height:22px}.carousel-arrow.prev{left:12px}.carousel-arrow.next{right:12px}.carousel-arrow:hover{background:#0a0a0fcc}.carousel-arrow:focus-visible{opacity:1;outline:2px solid var(--accent);outline-offset:2px}.carousel:hover .carousel-arrow,.carousel:focus-within .carousel-arrow{opacity:1}.carousel-dots{display:flex;justify-content:center;gap:10px;margin-top:16px}.carousel-dots button{width:9px;height:9px;padding:0;border:none;border-radius:999px;background:var(--border);cursor:pointer;transition:background .2s ease,transform .2s ease}.carousel-dots button:hover{background:var(--muted)}.carousel-dots button.is-active{background:var(--accent);transform:scale(1.25)}@media(max-width:600px){.carousel-arrow{opacity:1;width:38px;height:38px}}@media(prefers-reduced-motion:reduce){.carousel-slide{transition:none}}