/* 黄果AI短剧 · 单页 B —— 黑金大字报版
   配色：纯黑 #0b0b0b 打底 + 金渐变 #ffd21e 主色 */

:root{
  color-scheme:dark;
  --ink:#0b0b0b;--ink-2:#121212;--card:#171717;--card-2:#1d1d1d;
  --line:rgba(255,210,30,.22);--line-soft:rgba(255,255,255,.08);
  --gold:#ffd21e;--gold-2:#ffb400;font-synthesis:none;
  --gold-grad:linear-gradient(180deg,#ffdf52 0%,#ffd21e 45%,#ffb400 100%);
  --txt:#f2efe6;--muted:#9d9789;--on-gold:#241c00;--on-gold-soft:#3d3208;
}

/* ===== 基础 ===== */
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:86px}
body{font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Noto Sans CJK SC",sans-serif;background:var(--ink);color:var(--txt);font-size:16px;line-height:1.7;overflow-x:hidden;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}
img{display:block;max-width:100%;height:auto}
a{text-decoration:none;color:inherit}
ul,ol{list-style:none}
button{border:0;background:none;cursor:pointer;font:inherit;color:inherit}
a,button{-webkit-tap-highlight-color:transparent}
a:focus-visible,button:focus-visible{outline:3px solid var(--gold);outline-offset:4px}
[hidden]{display:none!important}
::selection{background:var(--gold);color:var(--on-gold)}
.wrap{width:1200px;max-width:100%;margin:0 auto;padding:0 20px}
.wrap-slim{width:1200px}
.qa{max-width:880px}
.skip-link{position:fixed;left:16px;top:-80px;z-index:100;background:var(--gold);color:var(--on-gold);padding:10px 20px;border-radius:6px;font-weight:700}
.skip-link:focus{top:12px}

/* 入场动画 */
.pop{opacity:0;transform:translateY(22px);transition:opacity .55s ease,transform .55s cubic-bezier(.22,.61,.36,1)}
.pop.pop-on{opacity:1;transform:none}

/* ===== 按钮 ===== */
.blk-btn{display:inline-block;background:var(--gold);color:var(--on-gold);font-size:16.5px;font-weight:800;padding:15px 36px;border-radius:10px;transition:transform .2s,box-shadow .2s,filter .2s}
.blk-btn:hover{transform:translateY(-2px);filter:brightness(1.05)}
.blk-btn:active{transform:translateY(0) scale(.98)}
.blk-btn.big{font-size:18.5px;padding:18px 56px}
.line-btn{display:inline-block;background:transparent;color:var(--gold);border:1.5px solid var(--line);font-size:16px;font-weight:800;padding:14px 34px;border-radius:10px;transition:background .2s,border-color .2s}
.line-btn:hover{background:rgba(255,210,30,.1);border-color:var(--gold)}

/* ===== 顶部导航 ===== */
.hdr{position:sticky;top:0;z-index:60;background:rgba(11,11,11,.92);backdrop-filter:blur(12px);border-bottom:1px solid var(--line-soft)}
.hdr-in{width:1200px;max-width:100%;margin:0 auto;height:70px;display:flex;align-items:center;gap:26px;padding:0 20px}
.hdr-logo{display:flex;align-items:center;gap:10px;flex-shrink:0;color:var(--gold)}
.hdr-nav{display:flex;gap:22px;margin-left:auto;font-size:14.5px;font-weight:600;color:var(--muted);white-space:nowrap}
.hdr-nav a{transition:color .2s}
.hdr-nav a:hover{color:var(--gold)}
.hdr-cta{flex-shrink:0;background:var(--gold);color:var(--on-gold);font-size:14px;font-weight:800;padding:11px 20px;border-radius:8px;min-height:44px;display:inline-flex;align-items:center;transition:transform .2s,filter .2s}
.hdr-cta:hover{transform:translateY(-2px);filter:brightness(1.06)}
.hdr-burger{display:none;width:44px;height:44px;padding:11px;border:1px solid var(--line);border-radius:10px;flex-shrink:0}
.hdr-burger i{display:block;height:2px;background:var(--gold);margin:4px 0;transition:transform .2s,opacity .2s}
.hdr-burger[aria-expanded=true] i:nth-child(1){transform:translateY(6px) rotate(45deg)}
.hdr-burger[aria-expanded=true] i:nth-child(2){opacity:0}
.hdr-burger[aria-expanded=true] i:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
.hdr-drawer{border-top:1px solid var(--line-soft);background:var(--ink-2);padding:10px 20px 20px}
.hdr-drawer a{display:block;padding:11px 4px;font-size:16px;font-weight:600;border-bottom:1px solid var(--line-soft)}
.hdr-drawer .drawer-cta{margin-top:16px;border:0;text-align:center;background:var(--gold);color:var(--on-gold);font-weight:800;border-radius:10px;padding:15px}

/* ===== 首屏大字报 ===== */
.bz{position:relative;isolation:isolate;overflow:hidden;padding:64px 0 72px}
.bz-bg{position:absolute;inset:0;z-index:-1;width:100%;height:100%;object-fit:cover;opacity:.3;pointer-events:none;mask-image:linear-gradient(to bottom,#000 10%,transparent);-webkit-mask-image:linear-gradient(to bottom,#000 10%,transparent)}
.bz-in{width:1200px;max-width:100%;margin:0 auto;padding:0 20px;display:grid;grid-template-columns:1.08fr .92fr;align-items:center;gap:48px}
.bz-kicker{display:flex;align-items:center;flex-wrap:wrap;gap:10px;font-size:13px;font-weight:800;letter-spacing:.1em;color:var(--muted)}
.bz-kicker span{color:var(--gold)}
.live-dot{width:7px;height:7px;border-radius:50%;background:var(--gold);flex-shrink:0}
.bz-title{margin:22px 0 24px;font-size:clamp(44px,5.6vw,76px);font-weight:900;line-height:1.32;letter-spacing:0}
.bz-title .line{display:block}
.bz-title mark{background:var(--gold-grad);color:var(--on-gold);padding:.06em .14em;margin-right:.12em;border-radius:6px;box-decoration-break:clone;-webkit-box-decoration-break:clone}
.bz-sub{font-size:16.5px;line-height:1.95;color:var(--muted);max-width:560px}
.bz-sub b{color:var(--txt);font-weight:800}
.bz-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.bz-stats{display:flex;gap:38px;margin-top:38px;padding-top:26px;border-top:1px solid var(--line-soft)}
.bz-stats b{display:block;font-size:26px;font-weight:900;color:var(--gold);line-height:1.2}
.bz-stats span{display:block;font-size:13px;color:var(--muted);margin-top:4px}

.bz-visual{position:relative;justify-self:center}
.bz-phone{width:276px;max-width:100%;border-radius:34px;overflow:hidden;border:9px solid #1b1b1b;box-shadow:0 26px 70px rgba(0,0,0,.75),0 0 0 1px var(--line);background:#000}
.bz-phone img{width:100%}
.stk{position:absolute;background:var(--gold);color:var(--on-gold);font-size:12.5px;font-weight:800;line-height:1.5;padding:9px 13px;border-radius:8px;box-shadow:0 8px 22px rgba(0,0,0,.5)}
.stk-a{top:26px;left:-54px}
.stk-b{bottom:96px;right:-48px;transform:rotate(5deg)}
.bz-stamp{position:absolute;bottom:-14px;left:50%;transform:translateX(-50%);white-space:nowrap;background:#171717;border:1px solid var(--line);color:var(--gold);font-size:12.5px;font-weight:900;line-height:1.55;text-align:center;padding:9px 18px;border-radius:999px}

/* ===== 跑马灯 ===== */
.strip{background:var(--ink-2);border-block:1px solid var(--line-soft)}
.strip-track{display:flex;flex-wrap:wrap;justify-content:center;align-items:center;gap:10px 20px;width:1200px;max-width:100%;margin:0 auto;padding:18px 20px;font-size:14px;font-weight:700;letter-spacing:.04em;color:var(--muted)}
.strip-track i{font-style:normal;font-size:7px;color:var(--gold);opacity:.7}

/* ===== 区块通用 ===== */
.blk{padding:88px 0}
.blk-tint{background:var(--ink-2);border-block:1px solid var(--line-soft)}
.blk-head{margin-bottom:44px}
.blk-head{position:relative;padding-top:26px}
.blk-head:before{content:"";position:absolute;top:0;left:0;width:56px;height:2px;background:var(--gold)}
.blk-title{margin:0 0 12px;font-size:clamp(29px,3.7vw,42px);font-weight:900;letter-spacing:0;line-height:1.35}
.blk-sub{font-size:15.5px;color:var(--muted);max-width:640px}
.slide-tip{display:none;margin-top:16px;text-align:center;font-size:12.5px;color:var(--muted)}

/* ===== 拍立得墙 ===== */
.wall{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:30px 26px}
.wall-card{background:var(--card);border:1px solid var(--line-soft);padding:0;border-radius:12px;overflow:hidden;box-shadow:0 14px 34px rgba(0,0,0,.55);transition:transform .3s,box-shadow .3s,border-color .3s}
.wall-pic{position:relative;overflow:hidden;background:#000}
.wall-pic img{width:100%;aspect-ratio:3/4;object-fit:cover;transition:transform .5s cubic-bezier(.16,1,.3,1)}

/* ===== 理由卡片 ===== */
.deck{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}
.deck-card{position:relative;background:var(--card);border:1px solid var(--line-soft);border-radius:16px;padding:30px 26px 28px;box-shadow:0 10px 26px rgba(0,0,0,.5);transition:transform .25s,box-shadow .25s,border-color .25s}
.deck-card:hover{transform:translateY(-3px);box-shadow:0 16px 34px rgba(0,0,0,.6);border-color:var(--line)}
.dk-gold{background:var(--gold);border-color:transparent;box-shadow:0 10px 26px rgba(0,0,0,.55)}
.deck-num{display:block;font-size:13px;font-weight:900;letter-spacing:.16em;color:var(--gold)}
.deck-card h3{margin:0 0 10px;font-size:21px;font-weight:900;letter-spacing:0}
.deck-card p{font-size:14.5px;line-height:1.85;color:var(--muted)}
/* 金底卡片的文字改深色，必须放在上面三条之后才能覆盖 */
.dk-gold .deck-num,.dk-gold h3,.dk-gold p{color:var(--on-gold)}
.dk-gold p{color:var(--on-gold-soft)}
.why-cta{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:18px;margin-top:46px;text-align:center}
.why-cta p{font-size:15.5px;font-weight:700;color:var(--muted)}

/* ===== 三步链条 ===== */
.chain{display:flex;align-items:stretch;gap:14px}
.chain-step{flex:1;background:var(--card);border:1px solid var(--line-soft);border-radius:16px;padding:28px 24px;text-align:center}
.chain-dot{display:inline-grid;place-items:center;width:46px;height:46px;border-radius:50%;background:var(--gold);color:var(--on-gold);font-size:20px;font-weight:900;margin-bottom:16px}
.chain-step h3{font-size:19px;font-weight:900;margin-bottom:8px}
.chain-step p{font-size:14px;color:var(--muted);line-height:1.8}
.chain-arrow{display:grid;place-items:center;color:var(--gold);font-size:26px;font-weight:900;flex-shrink:0}

/* ===== 公告板 ===== */
.board{display:grid;gap:16px}
.board-item{position:relative;display:flex;align-items:center;gap:18px;background:var(--card);border:1px solid var(--line-soft);border-radius:12px;padding:22px 24px;transition:background .2s,transform .2s}
.board-item:hover{background:var(--card-2);transform:translateX(4px)}
.board-chip{flex-shrink:0;background:var(--gold);color:var(--on-gold);font-size:12px;font-weight:900;padding:5px 12px;border-radius:6px}
.board-txt b{display:block;font-size:16.5px;font-weight:800;line-height:1.6}
.board-txt>span{display:block;font-size:13.5px;color:var(--muted);margin-top:3px}
.board-pin{display:none}

/* ===== 问答 ===== */
.qa{border-top:1px solid var(--line-soft)}
.qa-item{border-bottom:1px solid var(--line-soft)}
.qa-q{display:flex;align-items:center;justify-content:space-between;gap:18px;width:100%;text-align:left;padding:22px 2px;font-size:17px;font-weight:800;line-height:1.6;transition:color .2s}
.qa-q:hover{color:var(--gold)}
.qa-q i{position:relative;width:15px;height:15px;flex-shrink:0}
.qa-q i:before,.qa-q i:after{content:"";position:absolute;top:7px;left:0;width:15px;height:2px;background:var(--gold);border-radius:2px}
.qa-q i:after{transform:rotate(90deg);transition:transform .25s}
.qa-a{display:none;padding:0 40px 24px 2px}
.qa-a p{font-size:15px;line-height:1.95;color:var(--muted);max-width:34em}
.qa-a p+p{margin-top:10px}
.qa-a a{display:inline-flex;align-items:center;min-height:44px;color:var(--gold);font-weight:800;text-decoration:underline;text-underline-offset:4px;overflow-wrap:anywhere}
.qa-item.on .qa-q{color:var(--gold)}
.qa-item.on .qa-q i:after{transform:rotate(0)}
.qa-item.on .qa-a{display:block}

/* ===== 留言便利贴 ===== */
.notes{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}
.note-card{background:var(--card);border:1px solid var(--line-soft);border-radius:12px;padding:26px 24px 22px;color:var(--txt);min-height:170px;display:flex;flex-direction:column;gap:18px}
.note-txt{font-size:15px;line-height:1.9;color:var(--txt)}
.note-meta{display:flex;align-items:center;gap:10px;margin-top:auto;font-size:13px;color:var(--muted)}
.note-ava{display:grid;place-items:center;width:32px;height:32px;border-radius:50%;background:#2a2512;color:var(--gold);font-size:13px;font-weight:800;flex-shrink:0}
.note-nick{font-weight:700;color:var(--txt)}
.note-when{margin-left:auto;color:var(--muted);font-variant-numeric:tabular-nums}

/* ===== 收尾 CTA ===== */
.endcard{position:relative;isolation:isolate;overflow:hidden;padding:96px 0 100px;text-align:center}
.end-bg{position:absolute;inset:0;z-index:-1;width:100%;height:100%;object-fit:cover;opacity:.42;pointer-events:none;mask-image:linear-gradient(to bottom,transparent,#000 35%,#000 65%,transparent);-webkit-mask-image:linear-gradient(to bottom,transparent,#000 35%,#000 65%,transparent)}
.endcard-in{width:900px;max-width:100%;margin:0 auto;padding:0 20px}
.end-en{font-size:13px;font-weight:900;letter-spacing:.3em;color:var(--gold)}
.end-title{margin:18px 0 16px;font-size:clamp(30px,4.4vw,48px);font-weight:900;letter-spacing:0;line-height:1.4}
.end-title mark{background:var(--gold-grad);color:var(--on-gold);padding:.06em .14em;margin-right:.12em;border-radius:6px;box-decoration-break:clone;-webkit-box-decoration-break:clone}
.end-sub{font-size:16px;color:var(--muted);margin-bottom:34px}
.end-links{display:flex;justify-content:center;flex-wrap:wrap;gap:14px 30px;margin-top:34px}
.end-links a{display:inline-flex;align-items:center;gap:8px;min-height:44px;font-size:14.5px;font-weight:700;color:var(--muted);transition:color .2s}
.end-links a:hover{color:var(--gold)}
.end-links img{width:18px;height:18px;filter:invert(68%) sepia(12%) saturate(220%) brightness(95%)}
.end-links a:hover img{filter:invert(82%) sepia(62%) saturate(1200%) hue-rotate(354deg) brightness(104%)}

/* ===== 页脚 ===== */
.foot2{border-top:1px solid var(--line-soft);padding:30px 0 34px;background:var(--ink-2)}
.foot2-in{display:flex;flex-wrap:wrap;align-items:center;gap:10px 24px;font-size:13px;color:var(--muted)}
.foot2-brand{font-weight:900;color:var(--txt)}
.foot2-copy{margin-left:auto;font-variant-numeric:tabular-nums}

/* ===== 响应式 ===== */
@media(max-width:1023px){
  .hdr-nav{display:none}
  .hdr-cta{margin-left:auto}
  .hdr-burger{display:block}
  .bz{padding:48px 0 60px}
  .bz-in{grid-template-columns:1fr;gap:54px}
  .bz-sub{max-width:none}
  .bz-visual{margin-top:8px}
  .blk{padding:68px 0}
  .blk-head{margin-bottom:34px}
  .wall{grid-template-columns:repeat(2,minmax(0,1fr));gap:24px 20px}
  .deck{grid-template-columns:repeat(2,minmax(0,1fr))}
    .notes{grid-template-columns:repeat(2,minmax(0,1fr))}
  .endcard{padding:76px 0 80px}
}
@media(max-width:767px){
  html{scroll-padding-top:76px}
  .hdr-in{height:76px;gap:12px}
  .hdr-cta{font-size:13px;padding:8px 15px}
  .bz{padding:34px 0 48px}
  .bz-in{gap:44px}
  .bz-title{margin:18px 0 18px}
  .bz-sub{font-size:15px}
  .bz-actions{gap:11px;margin-top:24px;flex-direction:column;align-items:stretch}
  .blk-btn{display:block;text-align:center;padding:16px 24px}
  .line-btn{display:block;text-align:center;padding:14px 24px}
  .bz-stats{gap:0;justify-content:space-between;margin-top:30px;padding-top:22px}
  .bz-stats b{font-size:22px}
  .bz-stats span{font-size:12px}
  .bz-phone{width:236px;border-width:7px;border-radius:28px}
  .stk-a{top:16px;left:-26px;font-size:11.5px;padding:8px 11px}
  .stk-b{bottom:80px;right:-24px;font-size:11.5px;padding:8px 11px}
  .bz-stamp{font-size:11.5px;padding:8px 15px}
  .strip-track{font-size:13px;gap:18px}
  .blk{padding:54px 0}
  .blk-head{margin-bottom:26px}
  .blk-title{margin:14px 0 10px}
  .blk-sub{font-size:14.5px}
  /* 拍立得墙改横滑 */
  .wall{display:flex;gap:16px;overflow-x:auto;scroll-snap-type:x mandatory;scrollbar-width:none;padding:14px 4px 10px;margin:-14px -20px 0;padding-inline:20px}
  .wall::-webkit-scrollbar{display:none}
  .wall-card{flex:0 0 72%;scroll-snap-align:center;transform:none}
  .slide-tip{display:block}
  .deck{grid-template-columns:1fr;gap:16px}
  .deck-card{padding:24px 22px 22px}
  .deck-card h3{font-size:19px}
  .why-cta{margin-top:34px;flex-direction:column;gap:14px}
  .why-cta .blk-btn{width:100%}
  .chain{flex-direction:column;gap:10px}
  .chain-arrow{transform:rotate(90deg);font-size:22px;padding:2px 0}
  .chain-step{padding:22px 20px}
  .board-item{flex-direction:column;align-items:flex-start;gap:12px;padding:20px 20px 22px}
  .board-pin{top:20px;right:18px;margin-top:0}
  .qa-q{font-size:15.5px;padding:18px 2px}
  .qa-a{padding:0 6px 20px 2px}
  .qa-a p{font-size:14.5px}
  /* 留言板改横滑 */
  .notes{display:flex;gap:14px;overflow-x:auto;scroll-snap-type:x mandatory;scrollbar-width:none;padding:10px 4px;margin-inline:-20px;padding-inline:20px}
  .notes::-webkit-scrollbar{display:none}
  .note-card{flex:0 0 80%;scroll-snap-align:center;transform:none;min-height:0}
  .endcard{padding:58px 0 62px}
  .end-sub{font-size:15px;margin-bottom:28px}
  .endcard-in .blk-btn{width:100%}
  .end-links{gap:12px 22px;margin-top:28px}
  .foot2-in{flex-direction:column;align-items:flex-start;gap:8px;line-height:1.8}
  .foot2-copy{margin-left:0}
}
@media(max-width:374px){
  .bz-phone{width:208px}
  .stk-a,.stk-b{display:none}
  .bz-stats b{font-size:20px}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*:before,*:after{transition:none!important;animation:none!important}
  .pop{opacity:1;transform:none}
}
@media(prefers-reduced-transparency:reduce){
  .hdr{backdrop-filter:none;background:var(--ink)}
}
@media(hover:hover) and (prefers-reduced-motion:no-preference){
  .wall-card:hover{transform:translateY(-6px);box-shadow:0 20px 44px rgba(0,0,0,.7);border-color:var(--line)}
  .wall-card:hover .wall-pic img{transform:scale(1.04)}
}

/* ===== 海报说明（剧名 / 钩子 / 题材）=====
   官方海报自带烧死的剧名，HTML 文字不再叠在图上，整体移到海报下方。
   海报保持原图不加遮罩；剧名、钩子、题材仍是真文字，搜索引擎照抓 */
.wall-pic img{width:100%;aspect-ratio:3/4;object-fit:cover;transition:transform .5s cubic-bezier(.16,1,.3,1)}
.wall-plate{display:block;padding:15px 16px 17px;text-align:left}
.wall-name{display:block;font-size:20px;font-weight:900;line-height:1.35;color:var(--txt)}
.wall-hook{margin-top:7px;font-size:12.5px;line-height:1.65;color:var(--muted);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.wall-meta{display:flex;align-items:center;gap:10px;margin-top:12px;font-size:13px}
.wall-genre{color:var(--gold);letter-spacing:.06em;border:1px solid var(--line);border-radius:999px;padding:4px 11px;white-space:nowrap}
.wall-eps{color:var(--muted);font-variant-numeric:tabular-nums}
.wall-eps:empty{display:none}

/* 首屏手机样机：官方海报是 3:4，不能按 9:19.5 裁——会把烧死的剧名切掉。
   改成在黑色机屏里完整显示，剧名条落在海报下方的黑区，跟真 App 详情页一个样 */
.bz-phone{position:relative}
.bz-phone img{aspect-ratio:3/4;object-fit:contain;object-position:center top;background:#000}
.bz-phone figcaption{padding:14px 16px 20px;text-align:left;background:#000}
.bz-phone figcaption strong{display:block;font-size:19px;font-weight:900;color:#fff;line-height:1.4}
.bz-phone figcaption span{display:block;margin-top:5px;font-size:12px;color:var(--muted)}

/* 官方 logo 换掉了占位的圆形播放图标 */

@media(max-width:1023px){.wall-name{font-size:19px}}
@media(max-width:767px){
  .blk-head{padding-top:22px}
  .wall-plate{padding:13px 14px 15px}
  .wall-name{font-size:18px}
  .wall-hook{font-size:12px}
  .wall-meta{font-size:12.5px}
  .bz-phone figcaption strong{font-size:17px}
}

/* ===== 官方 logo 尺寸（2026-10-21 放大）=====
   同 A 套：原来基准规则压在媒体查询后面，响应式是失效的。
   统一挪到文件末尾，从大到小排。H5 上 logo 下面那行
   huangguoai.com 太小会糊，手机端跟平板保持同一尺寸。 */
.hdr-logo-img{height:52px;width:auto;display:block}
@media(max-width:1199px){.hdr-logo-img{height:48px}}
@media(max-width:767px){.hdr-logo-img{height:48px}}
@media(max-width:374px){.hdr-logo-img{height:40px}}