/* 懂你直播盒子：按用户提供的完整 HTML 页面结构移植；主题颜色继续由 PHP config.json 控制 */
:root{color-scheme:dark;--page-bg:#12141a;--panel-bg:#1e222c;--accent-color:#6366f1;--main-text:#e2e8f0;--muted-text:#94a3b8;--border-color:#343a4a;--button-text:#fff;--link-color:#a5b4fc;--hover-color:#8b5cf6;--surface-text:#e2e8f0;--page-overlay:#272c3a;--notice-color:#ff4d5e;--nav-shadow:0 1px 6px color-mix(in srgb,var(--page-bg) 78%,transparent);--logo-glow:0 4px 16px color-mix(in srgb,var(--accent-color) 28%,transparent);--button-shadow:0 3px 10px color-mix(in srgb,var(--page-bg) 42%,transparent);--floating-shadow:0 3px 14px color-mix(in srgb,var(--page-bg) 82%,transparent);--card-shadow:0 2px 14px color-mix(in srgb,var(--page-bg) 72%,transparent)}
*{margin:0;padding:0;box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html{scroll-behavior:smooth;scroll-padding-top:70px}
body{min-height:100vh;background:var(--page-bg);color:var(--main-text);font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;line-height:1.7;padding:54px 0 24px;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto}
.top-navbar{position:fixed;top:0;left:0;width:100%;height:54px;background:var(--panel-bg);box-shadow:var(--nav-shadow);z-index:9998}
.nav-inner{max-width:640px;margin:0 auto;height:100%;display:flex;align-items:center;justify-content:space-around;padding:0 14px;gap:3px}
.nav-item{font-size:14.5px;color:var(--muted-text);text-decoration:none;padding:5px 10px;border-radius:8px;white-space:nowrap;transition:.22s}
.nav-item.active{color:var(--link-color);font-weight:600;background:var(--page-overlay)}
.app-container{width:100%;max-width:640px;margin:0 auto;padding:16px;display:flex;flex-direction:column;gap:18px}
.hero-section{position:relative;text-align:center;padding:48px 18px 26px;background:var(--panel-bg);border:1px solid var(--border-color);border-radius:14px;margin-bottom:0;overflow:hidden;box-shadow:var(--card-shadow)}
.hero-section:before{content:"";position:absolute;left:0;top:0;width:100%;height:6px;background:linear-gradient(90deg,var(--accent-color),var(--hover-color))}
.security-badge{position:absolute;top:12px;right:12px;background:var(--page-overlay);color:var(--link-color);font-size:12px;padding:4px 11px;border-radius:20px;font-weight:500;z-index:2}
.logo-area{position:relative;z-index:2;display:flex;align-items:center;justify-content:center;gap:14px;margin:10px 0 8px}
.app-logo-img{display:block;border-radius:14px;width:74px;height:74px;object-fit:cover;box-shadow:var(--logo-glow);background:var(--page-overlay)}
.app-title h1{font-size:26px;font-weight:700;color:var(--surface-text);letter-spacing:.5px;line-height:1.3}
.app-slogan{font-size:13px;color:var(--muted-text);margin-top:4px}
.app-subtitle{position:relative;z-index:2;font-size:14.5px;color:var(--muted-text);margin-top:4px}
.update-tag{position:absolute;left:16px;top:14px;z-index:4;display:inline-flex;align-items:center;max-width:calc(100% - 150px);margin:0;padding:4px 11px;border-radius:20px;background:var(--page-overlay);color:var(--link-color);font-size:11px;line-height:1.5;white-space:normal;overflow-wrap:anywhere;text-align:left}
.hero-downloads{position:relative;z-index:2;margin:28px auto 0;display:flex;flex-direction:column;gap:12px;width:100%;max-width:100%}
.dl-btn{display:flex;align-items:center;justify-content:center;gap:12px;min-height:58px;padding:16px 18px;border:0;border-radius:16px;background:linear-gradient(90deg,var(--accent-color),var(--hover-color));color:var(--button-text);text-decoration:none;font-size:15.5px;font-weight:600;transition:all .22s ease;box-shadow:var(--button-shadow)}
.dl-btn:active{transform:scale(.97)}.dl-btn.secondary{background:var(--page-overlay);color:var(--link-color);border:1px solid var(--border-color);box-shadow:none}
.dl-icon{display:inline-flex;align-items:center;justify-content:center;width:24px;height:24px;flex:0 0 24px}.dl-icon svg{width:100%;height:100%;fill:currentColor}.dl-arrow{display:none}
.card{border-radius:12px;padding:22px 18px;margin-bottom:0;background:var(--panel-bg);border:1px solid var(--border-color);box-shadow:var(--card-shadow)}
.invite-section{padding:22px 18px;background:var(--panel-bg)}
.invite-header{font-size:17px;color:var(--link-color);margin-bottom:16px;font-weight:700;text-align:center}
.invite-box{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;padding:16px 18px;background:var(--page-overlay);border:1px solid var(--border-color);border-radius:12px}
.invite-left{display:flex;align-items:center;gap:12px;flex:1;min-width:0}.invite-label{font-size:15px;color:var(--muted-text)}
.invite-code,#content{color:var(--link-color);font-weight:700;font-size:20px;letter-spacing:1.6px;overflow-wrap:anywhere}
.copy-btn{background:var(--accent-color);color:var(--button-text);border:0;padding:8px 16px;border-radius:10px;font-size:14px;font-weight:600;cursor:pointer;transition:all .22s;min-height:40px}.copy-btn:active{transform:scale(.95)}
.invite-tip{margin-top:12px;font-size:13px;color:var(--muted-text);text-align:center;overflow-wrap:anywhere}
/* 红色注意文字固定 13px；长文本自动换行，不会撑破手机屏幕 */
.invite-notice{display:block;width:100%;max-width:100%;margin:16px 0 2px;color:var(--notice-color);font-size:13px!important;font-weight:600;line-height:1.7;text-align:center;white-space:normal;overflow-wrap:anywhere;word-break:break-word}
.feature-section-title{font-size:17px;font-weight:700;color:var(--link-color);margin:0 2px -8px;text-align:left}
.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,125px),1fr));gap:12px;margin-bottom:0}
.feature-item{min-width:0;padding:16px 10px;background:var(--panel-bg);border:1px solid var(--border-color);border-radius:12px;text-align:center;box-shadow:var(--card-shadow)}
.feature-icon{width:28px;height:28px;margin:0 auto 9px;color:var(--link-color);font-size:25px;line-height:28px}.feature-icon svg{width:100%;height:100%;fill:currentColor}
.feature-title{font-size:14px;font-weight:600;color:var(--main-text);overflow-wrap:anywhere}.feature-desc{font-size:12.5px;color:var(--muted-text);margin-top:4px;overflow-wrap:anywhere}
.seo-content{padding:22px 18px;line-height:1.8;font-size:14.5px;color:var(--main-text);margin-bottom:0;overflow-wrap:anywhere}
.seo-content h2{margin:0 0 10px;color:var(--link-color);font-size:19px}.seo-content h3{margin:16px 0 8px;color:var(--link-color);font-size:16.5px}.seo-content p{margin-bottom:10px}.seo-content ul{padding-left:24px}.seo-content li{margin-bottom:4px}.faq-item strong{display:block;color:var(--main-text);margin-bottom:3px}.faq-item span{display:block;color:var(--muted-text)}
.friend-link{padding:22px 18px}.friend-link-title{font-size:17px;color:var(--link-color);margin-bottom:14px;font-weight:700}.friend-list{display:flex;flex-wrap:wrap;gap:10px}.friend-list a{padding:6px 14px;color:var(--link-color);text-decoration:none;border-radius:8px;font-size:13px;background:var(--page-overlay)}.friend-list a:hover{background:var(--border-color)}
.main-footer{text-align:center;font-size:13px;color:var(--muted-text);padding:12px 0}.safe-bottom{height:30px}
.back-to-top{position:fixed;right:max(16px,calc((100vw - 640px)/2 + 16px));bottom:24px;width:44px;height:44px;border-radius:50%;background:var(--panel-bg);color:var(--link-color);border:1px solid var(--border-color);display:flex;align-items:center;justify-content:center;z-index:998;opacity:0;visibility:hidden;transition:.24s;box-shadow:var(--floating-shadow);font-size:21px;cursor:pointer}.back-to-top.show{opacity:1;visibility:visible}.back-to-top:active{transform:scale(.92)}
.toast{position:fixed;left:50%;top:42%;transform:translate(-50%,-50%);background:var(--panel-bg);color:var(--main-text);padding:12px 22px;border-radius:10px;font-size:14px;z-index:99999;display:none;border:1px solid var(--accent-color)}
a{color:var(--link-color)}
@media(max-width:600px){.app-container{padding:14px;gap:15px}.hero-section{padding:48px 15px 24px}.nav-inner{padding:0 7px}.nav-item{font-size:13px;padding:6px 7px}.features-grid{gap:8px}.feature-item{padding:14px 6px}.feature-title{font-size:13px}.feature-desc{font-size:11.5px}.seo-content{padding:19px 16px}}
@media(max-width:380px){.app-container{padding:10px;gap:13px}.update-tag{left:12px;top:12px;font-size:10px}.security-badge{right:10px;top:10px;font-size:11px}.dl-btn{min-height:56px;border-radius:14px;font-size:15px}.nav-inner{padding:0 3px}.nav-item{font-size:12px;padding:5px 4px}.logo-area{gap:10px}.app-logo-img{width:64px;height:64px}.app-title h1{font-size:22px}.invite-box{padding:13px 12px}.invite-left{gap:8px}.invite-label{font-size:13px}.invite-code,#content{font-size:18px}.feature-item{padding:12px 4px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;animation:none!important;transition:none!important}}

/* 维护模式：沿用首页主题变量，独立展示居中维护面板 */
html:has(body.maintenance-page){min-height:100%;scroll-padding-top:0}
body.maintenance-page{min-height:100vh;margin:0;padding:24px;display:flex;align-items:center;justify-content:center;background:var(--page-bg);color:var(--main-text);background-image:radial-gradient(ellipse at top, color-mix(in srgb,var(--page-overlay) 72%,transparent), transparent 65%);}
.maintenance-panel{width:min(100%,560px);padding:clamp(28px,6vw,48px) clamp(20px,5vw,38px);text-align:center;background:var(--panel-bg);color:var(--surface-text);border:1px solid var(--border-color);border-radius:16px;box-shadow:var(--card-shadow);position:relative;overflow:hidden;}
.maintenance-panel::before{content:"";position:absolute;left:0;right:0;top:0;height:5px;background:linear-gradient(90deg,var(--accent-color),var(--hover-color));}
.maintenance-panel h2{margin:0;color:var(--surface-text);font-size:clamp(16px,3.8vw,20px);font-weight:600;line-height:1.9;overflow-wrap:anywhere;}
@media(max-width:480px){body.maintenance-page{padding:18px}.maintenance-panel{border-radius:13px}}