:root{color-scheme:light;font-family:Segoe UI,PingFang SC,Microsoft YaHei,sans-serif;line-height:1.5;font-weight:400;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;--bg: #f3f6fb;--bg-elevated: rgba(255, 255, 255, .9);--surface: rgba(255, 255, 255, .88);--surface-strong: #ffffff;--surface-muted: #f7f9fc;--surface-gradient-start: #ffffff;--text: #18212f;--text-soft: #5d6879;--border: rgba(24, 33, 47, .08);--accent: #2776ea;--accent-strong: #175fd1;--accent-soft: rgba(39, 118, 234, .12);--accent-shadow: rgba(39, 118, 234, .24);--focus-ring: rgba(39, 118, 234, .16);--shadow: 0 14px 36px rgba(21, 35, 56, .08);--bg-end: #ebf0f8;--placeholder-text: rgba(93, 104, 121, .86);--placeholder-surface: #eef4ff;--placeholder-surface-strong: #e2ebfb;--placeholder-accent: #2f80ed;--placeholder-accent-strong: #225fd0;--placeholder-line: rgba(24, 33, 47, .22);--placeholder-line-soft: rgba(24, 33, 47, .12);--placeholder-bar: rgba(255, 255, 255, .72)}:root[data-theme=dark]{color-scheme:dark;--bg: #0b1120;--bg-elevated: rgba(12, 18, 32, .9);--surface: rgba(13, 20, 36, .86);--surface-strong: #111a2d;--surface-muted: #0f1829;--surface-gradient-start: #14213a;--text: #edf3ff;--text-soft: #9eabc0;--border: rgba(180, 198, 228, .12);--accent: #5aa2ff;--accent-strong: #7cb6ff;--accent-soft: rgba(90, 162, 255, .16);--accent-shadow: rgba(90, 162, 255, .28);--focus-ring: rgba(90, 162, 255, .2);--shadow: 0 18px 44px rgba(0, 0, 0, .34);--bg-end: #080d18;--placeholder-text: rgba(158, 171, 192, .92);--placeholder-surface: #12203a;--placeholder-surface-strong: #162847;--placeholder-accent: #5aa2ff;--placeholder-accent-strong: #82b8ff;--placeholder-line: rgba(237, 243, 255, .22);--placeholder-line-soft: rgba(237, 243, 255, .1);--placeholder-bar: rgba(9, 15, 27, .36)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;min-width:320px;min-height:100vh;background:radial-gradient(circle at top center,var(--accent-soft),transparent 28%),linear-gradient(180deg,var(--bg) 0%,var(--bg-end) 100%);color:var(--text)}button,input,select{font:inherit}button,select{cursor:pointer}#root{min-height:100vh}.app-shell{width:min(1180px,calc(100vw - 24px));margin:0 auto;padding:12px 0 18px}.app-header,.surface{border:1px solid var(--border);border-radius:18px;background:var(--surface);box-shadow:var(--shadow);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px)}.app-header{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:14px 16px}.brand{display:flex;align-items:center;gap:12px;min-width:0}.brand-mark{display:grid;place-items:center;width:42px;height:42px;border-radius:14px;background:linear-gradient(135deg,var(--accent),var(--accent-strong));color:#fff;font-size:14px;font-weight:800;letter-spacing:.06em;box-shadow:0 12px 24px var(--accent-shadow)}.brand-copy{min-width:0}.brand-copy h1{margin:0;font-size:20px;font-weight:700}.brand-copy p{margin:2px 0 0;color:var(--text-soft);font-size:13px}.header-badges{display:flex;align-items:center;gap:8px;flex-wrap:wrap}.badge,.surface-title,.surface-meta,.theme-toggle{display:inline-flex;align-items:center;justify-content:center;min-height:28px;padding:0 10px;border-radius:999px;font-size:12px;font-weight:600}.badge{background:var(--surface-muted);color:var(--text-soft)}.theme-toggle{border:1px solid var(--border);background:var(--surface-strong);color:var(--text);transition:border-color .2s ease,background-color .2s ease,color .2s ease}.theme-toggle:hover,.theme-toggle:focus-visible{border-color:var(--accent);color:var(--accent)}.badge-accent,.surface-title{background:var(--accent-soft);color:var(--accent)}.app-main{display:grid;gap:12px;margin-top:12px}.surface{padding:14px}.surface-head{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:12px}.surface-meta{background:var(--surface-muted);color:var(--text-soft)}.player-stage{overflow:hidden;border:1px solid var(--border);border-radius:16px;background:linear-gradient(180deg,var(--surface-gradient-start),var(--surface-muted))}.player-stage iframe,.player-placeholder{width:100%;border:0;aspect-ratio:16 / 9}.player-placeholder{display:grid;place-items:center;padding:20px}.placeholder-artwork{width:min(100%,680px);height:auto}.player-placeholder p{margin:6px 0 0;color:var(--text-soft);font-size:14px}.control-form{display:grid;gap:12px}.control-grid{display:grid;grid-template-columns:220px minmax(0,1fr) 140px;gap:10px}.field{display:flex;flex-direction:column;gap:8px}.field span,.meta-item span{color:var(--text-soft);font-size:13px;font-weight:600}.field input,.field select,.submit-button{min-height:46px;border-radius:14px}.field input,.field select{width:100%;padding:0 14px;border:1px solid var(--border);background:var(--surface-strong);color:var(--text);outline:none;transition:border-color .2s ease,box-shadow .2s ease,background-color .2s ease}.field input::placeholder{color:var(--placeholder-text)}.field input:focus,.field select:focus{border-color:var(--accent);box-shadow:0 0 0 4px var(--focus-ring)}.submit-button{align-self:end;border:0;background:linear-gradient(135deg,var(--accent),var(--accent-strong));color:#fff;font-weight:700;box-shadow:0 12px 24px var(--accent-shadow);transition:transform .2s ease,filter .2s ease}.submit-button:hover,.submit-button:focus-visible{transform:translateY(-1px);filter:brightness(1.03)}.control-meta{display:grid;grid-template-columns:180px minmax(0,1fr) 140px;gap:10px}.meta-item{min-width:0;padding:12px 14px;border:1px solid var(--border);border-radius:14px;background:var(--surface-muted)}.meta-item strong{display:block;margin-top:4px;color:var(--text);font-size:14px;font-weight:600;word-break:break-all}.form-error{margin:0;color:#de4b62;font-size:13px;font-weight:600}.info-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.surface-module{min-width:0}.surface-module-wide{grid-column:1 / -1}.faq-list{display:grid;gap:10px}.faq-item{border:1px solid var(--border);border-radius:14px;background:var(--surface-muted)}.simple-list li,.faq-item p{color:var(--text-soft)}.simple-list{margin:0;padding-left:18px}.simple-list li+li{margin-top:8px}.simple-list-muted li{line-height:1.7}.faq-item summary{padding:12px 14px;color:var(--text);font-size:14px;font-weight:600;cursor:pointer;list-style:none}.faq-item summary::-webkit-details-marker{display:none}.faq-item p{margin:0;padding:0 14px 14px;line-height:1.7}@media (max-width: 920px){.control-grid,.control-meta,.info-grid{grid-template-columns:1fr}.submit-button{width:100%}}@media (max-width: 640px){.app-shell{width:min(100vw - 16px,1180px);padding:8px 0 14px}.app-header,.surface{padding:12px;border-radius:16px}.app-header,.surface-head{flex-direction:column;align-items:flex-start}.brand-copy h1{font-size:18px}.badge,.surface-title,.surface-meta{min-height:26px}}@media (prefers-reduced-motion: reduce){*,*:before,*:after{scroll-behavior:auto!important;animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}