/* 信息流下载页通用组件（参考 7yue.app） —— 顶栏/视频网格/底栏/跑马灯/CTA
   accent 由各变体用 :root{--acc/--acc2/--grad} 覆盖 */
:root{--acc:#A855F7;--acc2:#EC4899;--grad:linear-gradient(135deg,#A855F7,#EC4899);--bg:#0A0A0F;--card:#15151d;--t2:#8b8fa3;--line:rgba(255,255,255,.08)}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;background:var(--bg);color:#fff;font-family:-apple-system,"PingFang SC","Microsoft YaHei",sans-serif}
.app{max-width:480px;margin:0 auto;min-height:100vh;min-height:100dvh;position:relative;padding-bottom:150px}
img{display:block}
.fade{opacity:0;transform:translateY(10px);transition:opacity .5s,transform .5s}
.loaded .fade{opacity:1;transform:none}
/* 网页版(H5)入口门控：默认隐藏，仅 ?h5=1（body.h5on）时显示 —— 对齐 sgui select 行为 */
.h5only{display:none!important}
body.h5on .h5only{display:inline-flex!important}

/* ===== 顶部吸顶栏 ===== */
.topbar{position:sticky;top:0;z-index:30;display:flex;align-items:center;gap:10px;padding:10px 12px;background:rgba(10,10,15,.92);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.topbar .logo{width:40px;height:40px;border-radius:11px;flex:0 0 auto;box-shadow:0 0 14px rgba(168,85,247,.4)}
.topbar .brand{flex:1;min-width:0}
.topbar .brand b{font-size:16px;display:block;line-height:1.1}
.topbar .brand .nav{font-size:11.5px;color:var(--acc);margin-top:2px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.topbar .brand .nav span{opacity:.5;margin:0 3px}
.tb-btn{flex:0 0 auto;padding:8px 13px;border-radius:999px;font-size:13px;font-weight:700;cursor:pointer;border:0}
.tb-btn.ghost{background:transparent;border:1.5px solid var(--acc);color:#fff}
.tb-btn.solid{background:var(--grad);color:#fff;box-shadow:0 3px 12px rgba(168,85,247,.4)}

/* ===== 特色大卡 ===== */
.featured{margin:12px;border-radius:14px;overflow:hidden;cursor:pointer;position:relative}
.featured .thumb{position:relative;aspect-ratio:16/9}
.featured .thumb img{width:100%;height:100%;object-fit:cover}
.featured .ftit{position:absolute;left:0;right:0;bottom:0;padding:22px 14px 12px;font-size:15px;font-weight:600;background:linear-gradient(180deg,transparent,rgba(0,0,0,.82))}

/* 分区标题 */
.sect{display:flex;align-items:center;justify-content:space-between;padding:6px 14px 2px}
.sect h3{margin:0;font-size:16px;position:relative;padding-bottom:5px}
.sect h3::after{content:"";position:absolute;left:0;bottom:0;width:60%;height:3px;border-radius:2px;background:var(--grad)}
.sect a{font-size:13px;color:var(--acc);cursor:pointer}

/* 分类 tab */
.cats{display:flex;gap:8px;padding:12px 14px 4px;overflow-x:auto}
.cat{flex:0 0 auto;padding:8px 18px;border-radius:999px;background:var(--card);border:1px solid var(--line);color:#cdd0da;font-size:13.5px;font-weight:600;cursor:pointer}
.cat.on{background:var(--grad);color:#fff;border-color:transparent}

/* ===== 双列视频网格 ===== */
.grid{display:grid;grid-template-columns:1fr 1fr;gap:10px;padding:10px 12px}
.vcard{cursor:pointer}
.vcard .thumb{position:relative;aspect-ratio:16/10;border-radius:10px;overflow:hidden;background:#000}
.vcard .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s}
.vcard:active .thumb img{transform:scale(1.05)}
.vip{position:absolute;top:6px;right:6px;background:rgba(0,0,0,.6);color:#ffd24a;font-size:10px;font-weight:800;padding:1px 6px;border-radius:5px;border:1px solid rgba(255,210,74,.5)}
.play{position:absolute;left:6px;bottom:6px;background:rgba(0,0,0,.55);color:#fff;font-size:11px;padding:2px 7px;border-radius:999px}
.dur{position:absolute;right:6px;bottom:6px;background:rgba(0,0,0,.55);color:#fff;font-size:11px;padding:2px 6px;border-radius:5px;font-variant-numeric:tabular-nums}
.dur.big{font-size:13px;padding:3px 9px}
.vt{margin:7px 2px 0;font-size:13px;line-height:1.4;color:#e7e9f0;display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden}

/* ===== 底部吸底栏 + 双 CTA ===== */
.bottom{position:fixed;left:0;right:0;bottom:0;z-index:40;max-width:480px;margin:0 auto}
.botbar{display:flex;align-items:center;gap:10px;padding:8px 12px;background:rgba(10,10,15,.95);backdrop-filter:blur(10px);border-top:1px solid var(--line)}
.botbar .logo{width:34px;height:34px;border-radius:9px;flex:0 0 auto}
.botbar b{font-size:14px;flex:0 0 auto}
.marquee{flex:1;overflow:hidden;white-space:nowrap;position:relative;height:20px}
.marquee span{position:absolute;will-change:transform;animation:mq 9s linear infinite;font-size:13px;color:var(--acc);font-weight:600}
@keyframes mq{0%{transform:translateX(100%)}100%{transform:translateX(-100%)}}
.botbar .go{flex:0 0 auto;padding:7px 14px;border-radius:999px;background:var(--grad);color:#fff;font-size:13px;font-weight:800;cursor:pointer;border:0}
.cta2{display:flex;gap:12px;padding:12px 14px calc(14px + env(safe-area-inset-bottom));background:var(--bg)}
.cta2 button{flex:1;height:52px;border:0;border-radius:14px;font-size:17px;font-weight:800;color:#fff;background:var(--grad);box-shadow:0 6px 20px rgba(168,85,247,.4);cursor:pointer}
.cta2 button.alt{background:linear-gradient(135deg,#6366F1,#22D3EE);box-shadow:0 6px 20px rgba(99,102,241,.4)}

/* 右侧悬浮竖排按钮 */
.side{position:fixed;right:0;top:38%;z-index:35;display:flex;flex-direction:column;gap:8px}
.side button{writing-mode:vertical-rl;letter-spacing:3px;padding:14px 8px;border:0;border-radius:12px 0 0 12px;background:var(--grad);color:#fff;font-size:14px;font-weight:700;cursor:pointer;box-shadow:-3px 3px 12px rgba(0,0,0,.4)}

/* 促销横幅 */
.promo{margin:12px;border-radius:14px;padding:14px 16px;background:var(--grad);display:flex;align-items:center;gap:12px;cursor:pointer;box-shadow:0 6px 22px rgba(168,85,247,.35)}
.promo .logo{width:46px;height:46px;border-radius:12px;flex:0 0 auto}
.promo .pt{flex:1}
.promo .pt b{font-size:16px;display:block}
.promo .pt small{font-size:12px;opacity:.9}
.promo .pbtn{flex:0 0 auto;background:#fff;color:#a21caf;font-weight:800;font-size:13px;padding:8px 14px;border-radius:999px}

/* Hero 大 banner */
.hero{position:relative;margin:0;height:210px;overflow:hidden}
.hero .bgstrip{position:absolute;inset:0;display:grid;grid-template-columns:repeat(4,1fr);gap:3px;opacity:.35}
.hero .bgstrip img{width:100%;height:100%;object-fit:cover}
.hero::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(10,10,15,.5),rgba(10,10,15,.4) 60%,var(--bg))}
.hero .htxt{position:absolute;left:18px;bottom:20px;z-index:2}
.hero .htxt h1{margin:0;font-size:30px;line-height:1.15;text-shadow:0 3px 14px rgba(0,0,0,.6)}
.hero .htxt h1 em{font-style:normal;color:var(--acc)}
.hero .htxt .tagline{display:inline-block;margin-top:8px;padding:5px 12px;border-radius:999px;background:var(--grad);font-size:13px;font-weight:700}

/* 客服浮标（信息流版，避开底部栏） */
.kefu{position:fixed;right:14px;bottom:calc(158px + env(safe-area-inset-bottom));z-index:38;width:48px;height:48px;border-radius:50%;display:grid;place-items:center;background:var(--card);border:1px solid var(--acc);box-shadow:0 0 18px rgba(168,85,247,.4);cursor:pointer}
.kefu svg{width:24px;height:24px;stroke:var(--acc)}