/* ============================================================
   同城兴趣交流 · 前台样式
   浅粉渐变背景 + 居中窄版（最大 480px，桌面不放大）+ 白色圆角卡片
   首屏为单张媒体卡，品牌胶囊在左上角，标题简介叠在图片底部
   ============================================================ */

:root{
  --theme:#ff5f9e;
  --theme-deep:#e8407f;
  --bg-1:#ffe6f0;
  --bg-2:#ffc6dc;
  --bg-3:#ff9ec6;

  --ink:#33202b;
  --ink-2:#7d6070;
  --ink-3:#a8919d;
  --card:#ffffff;
  --line:rgba(120,50,85,.10);
  --pink-line:rgba(255,95,158,.32);

  --maxw:480px;
  --radius:18px;
  --radius-sm:13px;
  --bar-h:0px;
  --shadow:0 10px 26px -18px rgba(150,40,90,.45);
  --shadow-card:0 6px 18px -12px rgba(150,40,90,.35);
  --shadow-btn:0 12px 24px -12px rgba(232,64,127,.8);
  --font:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC","Segoe UI",Roboto,sans-serif;
}

*,*::before,*::after{box-sizing:border-box}
[hidden]{display:none !important}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
/* 区块锚点定位时留一点上方间距，避免目标贴到屏幕边 */
#app > section{scroll-margin-top:14px}
.anchor-alias{display:block;height:0;overflow:hidden;scroll-margin-top:14px}

body{
  margin:0;
  min-height:100vh;
  font-family:var(--font);
  font-size:15px;
  line-height:1.65;
  color:var(--ink);
  background:linear-gradient(180deg,var(--bg-1) 0%,var(--bg-2) 46%,var(--bg-3) 100%);
  background-attachment:fixed;
  overflow-x:hidden;
  padding-bottom:calc(var(--bar-h) + env(safe-area-inset-bottom,0px) + 20px);
}

img,video{max-width:100%;display:block}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{list-style:none;padding:0}
svg{display:block}

:focus-visible{outline:3px solid var(--theme-deep);outline-offset:2px;border-radius:8px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}

.wrap{width:min(100% - 24px, var(--maxw));margin-inline:auto}
#app{display:flex;flex-direction:column;gap:12px;padding-top:12px}

/* ---------------- 通用卡片：粉色短竖线标题 ---------------- */
.card{
  background:var(--card);
  border-radius:var(--radius);
  box-shadow:var(--shadow-card);
  padding:15px 15px 16px;
}
.card__title{
  position:relative;
  font-size:16px;font-weight:800;letter-spacing:-.01em;
  padding-left:11px;margin-bottom:10px;
}
.card__title::before{
  content:"";position:absolute;left:0;top:.28em;
  width:3.5px;height:1em;border-radius:2px;
  background:linear-gradient(180deg,var(--theme),var(--theme-deep));
}
.card__body{font-size:14px;color:var(--ink-2);white-space:pre-line}

/* ---------------- 预览提示 ---------------- */
.preview-flag{
  position:sticky;top:0;z-index:30;
  display:flex;gap:8px;align-items:center;justify-content:center;
  padding:7px 14px;font-size:12px;font-weight:600;color:#7a3350;
  background:#fff6a8;border-bottom:1px solid #f0e08a;
}
.preview-flag span{padding:2px 8px;border-radius:999px;background:#4a2b17;color:#ffe98a;font-size:10.5px;font-weight:800}
.loading{text-align:center;color:#8a5f74;font-size:14px;padding:60px 0}

/* ---------------- 1. 首屏：单张媒体卡 + 叠字 ---------------- */
.hero{
  position:relative;overflow:hidden;padding:0;
  border-radius:calc(var(--radius) + 2px);
  aspect-ratio:4/3;          /* 默认较矮，实际由 .hero--ratio-* 覆盖 */
  background:#ffd9e8;
  box-shadow:var(--shadow);
}
.hero__media{position:absolute;inset:0}
.hero__media img,.hero__media video{width:100%;height:100%;object-fit:cover}
.hero__scrim{
  position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(180deg,rgba(96,18,58,0) 32%,rgba(104,20,62,.42) 60%,rgba(92,14,54,.8) 100%);
}
.hero__brand{
  position:absolute;top:11px;left:11px;z-index:3;
  display:inline-flex;align-items:center;gap:7px;
  max-width:calc(100% - 22px);
  padding:6px 12px;border-radius:999px;
  background:rgba(255,255,255,.94);
  color:var(--theme-deep);font-size:12.5px;font-weight:800;
  box-shadow:0 4px 14px -6px rgba(90,20,60,.5);
}
.hero__brand img{width:16px;height:16px;border-radius:5px;object-fit:cover;flex:none}
.hero__brand span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.hero__toggle{
  position:absolute;top:11px;right:11px;z-index:3;
  display:flex;align-items:center;gap:5px;
  padding:7px 12px;border:0;border-radius:999px;
  background:rgba(30,8,22,.45);color:#fff;font:inherit;font-size:12px;font-weight:700;
  cursor:pointer;backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);
}
.hero__toggle svg{width:13px;height:13px;fill:currentColor}
.hero__text{position:absolute;left:0;right:0;bottom:0;z-index:2;padding:16px 16px 18px}
.hero__title{
  font-size:23px;line-height:1.3;font-weight:800;letter-spacing:-.01em;
  color:#fff;text-shadow:0 2px 10px rgba(60,10,35,.45);
  text-wrap:balance;          /* 支持的浏览器会自动把标题断得更均衡 */
}
.hero__sub{
  margin-top:7px;font-size:13.5px;line-height:1.6;
  color:rgba(255,255,255,.93);text-shadow:0 1px 8px rgba(60,10,35,.45);
}

/* 首屏媒体比例（后台可配） */
.hero.hero--ratio-low{aspect-ratio:4/3}
.hero.hero--ratio-mid{aspect-ratio:1/1}
.hero.hero--ratio-tall{aspect-ratio:4/5}

/* 首屏文字对齐（后台可配，默认居中） */
.hero--align-center .hero__text{text-align:center}
.hero--align-center .hero__title,.hero--align-center .hero__sub{margin-inline:auto}
.hero--align-center .hero__sub{max-width:30em}
.hero--align-left .hero__text{text-align:left}

/* 没有媒体时：首屏退化为渐变文字卡，不是空白方块 */
.hero--plain,
.hero.hero--plain.hero--ratio-low,
.hero.hero--plain.hero--ratio-mid,
.hero.hero--plain.hero--ratio-tall{
  aspect-ratio:auto;min-height:168px;
  background:linear-gradient(150deg,var(--theme) 0%,var(--theme-deep) 100%);
  display:flex;flex-direction:column;justify-content:flex-end;
  padding:16px;gap:10px;
}
.hero--plain .hero__brand{position:static;align-self:flex-start}
.hero--plain .hero__text{position:static;padding:0}
.hero--plain .hero__title{font-size:22px}

/* 演示提示：放在首屏卡片下面，不压图 */
.demo-note{
  margin-top:-4px;padding:8px 12px;border-radius:12px;
  background:rgba(255,255,255,.62);
  border:1px dashed var(--pink-line);
  font-size:11.5px;color:#8a5570;line-height:1.55;
}

/* ---------------- 2. 主按钮：粉渐变 + 粗白边 + 两行 ---------------- */
.cta-main{
  display:block;width:100%;text-align:center;text-decoration:none;cursor:pointer;
  padding:15px 20px;border:4px solid #fff;border-radius:22px;
  background:linear-gradient(135deg,var(--theme) 0%,var(--theme-deep) 100%);
  box-shadow:0 14px 28px -14px rgba(232,64,127,.85);
  color:#fff;font-family:inherit;
  transition:transform .16s ease,filter .16s ease;
  -webkit-tap-highlight-color:transparent;
}
.cta-main:hover{transform:translateY(-1px);filter:brightness(1.03)}
.cta-main:active{transform:translateY(0);filter:brightness(.97)}
.cta-main__t{display:block;font-size:17px;font-weight:800;letter-spacing:.01em;line-height:1.3}
.cta-main__s{
  display:inline-block;margin-top:4px;font-size:12px;font-weight:600;
  color:rgba(255,255,255,.9);
  padding-bottom:1px;border-bottom:1px solid rgba(255,255,255,.55);
  /* 不用 max-content：长文案会在窄屏溢出。inline-block + max-width 让它自动换行，
     下划线跟着文字走，宽度最多占满按钮内容区 */
  max-width:100%;white-space:normal;overflow-wrap:anywhere;text-align:center;
}
.cta-main--pending{
  background:#fff;border-color:rgba(255,255,255,.6);
  box-shadow:var(--shadow-card);color:var(--ink-3);cursor:not-allowed;
}
.cta-main--pending .cta-main__s{color:var(--ink-3);border-bottom-color:transparent}

/* ---------------- 3. 三个说明按钮 ----------------
   默认 row：图标与文字横排，高度接近参考稿的紧凑小按钮 */
.quick{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:9px}
.quick__btn{
  display:flex;align-items:center;justify-content:center;gap:6px;
  min-height:34px;padding:5px 8px;
  border:1.5px solid var(--pink-line);border-radius:12px;
  background:#fff;box-shadow:var(--shadow-card);cursor:pointer;font-family:inherit;
  transition:transform .16s ease,border-color .16s ease;
}
.quick--stack .quick__btn{flex-direction:column;gap:7px;min-height:0;padding:12px 6px}
.quick__btn:hover{transform:translateY(-1px);border-color:var(--theme)}
.quick__ico{
  display:grid;place-items:center;width:22px;height:22px;flex:none;border-radius:50%;
  background:linear-gradient(135deg,rgba(255,95,158,.18),rgba(232,64,127,.26));
  color:var(--theme-deep);
}
.quick__ico svg{width:12px;height:12px;fill:currentColor}
.quick--stack .quick__ico{width:32px;height:32px}
.quick--stack .quick__ico svg{width:17px;height:17px}
.quick__label{font-size:12.5px;font-weight:700;color:var(--ink);line-height:1.2;text-align:center}
.quick--stack .quick__label{line-height:1.35}

/* ---------------- 4. 横向图集入口卡 ---------------- */
.entry{
  display:flex;align-items:center;gap:12px;width:100%;text-align:left;
  padding:11px 12px;border:1.5px solid var(--pink-line);border-radius:var(--radius);
  background:#fff;box-shadow:var(--shadow-card);cursor:pointer;font-family:inherit;color:inherit;
  transition:transform .16s ease,border-color .16s ease;
}
.entry:hover{transform:translateY(-1px);border-color:var(--theme)}
.entry__thumb{
  width:52px;height:52px;flex:none;border-radius:50%;object-fit:cover;
  background:#ffe0ee;border:2px solid #fff;box-shadow:0 2px 8px -3px rgba(150,40,90,.4);
}
.entry__thumb--empty{display:grid;place-items:center;color:var(--theme-deep)}
.entry__thumb--empty svg{width:20px;height:20px;fill:currentColor}
.entry__text{flex:1;min-width:0}
.entry__t{display:block;font-size:14.5px;font-weight:800;line-height:1.35}
.entry__s{display:block;font-size:12px;color:var(--ink-3);margin-top:2px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.entry__go{
  width:34px;height:34px;flex:none;border-radius:50%;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--theme),var(--theme-deep));color:#fff;
  box-shadow:0 6px 14px -8px rgba(232,64,127,.9);
}
.entry__go svg{width:15px;height:15px;fill:currentColor}

/* ---------------- 5. 四项功能：两列 ---------------- */
.features{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
.feature{
  padding:12px;border-radius:var(--radius-sm);
  background:linear-gradient(160deg,rgba(255,95,158,.07),rgba(255,95,158,.03));
  border:1px solid rgba(255,95,158,.16);
}
.feature__ico{
  display:grid;place-items:center;width:28px;height:28px;border-radius:9px;
  background:#fff;color:var(--theme-deep);margin-bottom:8px;
  box-shadow:0 3px 10px -6px rgba(150,40,90,.5);
}
.feature__ico svg{width:16px;height:16px;fill:currentColor}
.feature__t{font-size:13.5px;font-weight:800;margin-bottom:3px}
.feature__d{font-size:12px;color:var(--ink-2);line-height:1.55}

/* ---------------- 6. 步骤 ---------------- */
.steps{display:flex;flex-direction:column;gap:11px}
.step{display:flex;gap:11px}
.step__no{
  width:24px;height:24px;flex:none;border-radius:50%;
  background:linear-gradient(135deg,var(--theme),var(--theme-deep));color:#fff;
  display:grid;place-items:center;font-size:12px;font-weight:800;
}
.step__t{font-size:14px;font-weight:700}
.step__d{font-size:12.5px;color:var(--ink-2);margin-top:1px}

/* ---------------- 7. 常见问题 ---------------- */
.faq details{border-top:1px solid var(--line)}
.faq details:first-child{border-top:0}
.faq summary{
  cursor:pointer;list-style:none;padding:11px 0;
  font-size:14px;font-weight:700;display:flex;justify-content:space-between;gap:12px;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--theme-deep);font-weight:800;flex:none}
.faq details[open] summary::after{content:"–"}
.faq__a{padding:0 0 12px;font-size:13px;color:var(--ink-2);white-space:pre-line}

/* ---------------- 8. 下载入口 ---------------- */
.dl{display:grid;gap:9px}
.dl__item{
  display:flex;align-items:center;gap:11px;text-decoration:none;color:var(--ink);
  padding:11px 12px;border:1.5px solid var(--pink-line);border-radius:var(--radius-sm);
  background:#fff;transition:transform .16s ease,border-color .16s ease;
}
.dl__item:hover{transform:translateY(-1px);border-color:var(--theme)}
.dl__ico{
  width:32px;height:32px;flex:none;border-radius:10px;display:grid;place-items:center;
  background:linear-gradient(135deg,rgba(255,95,158,.16),rgba(232,64,127,.22));color:var(--theme-deep);
}
.dl__ico svg{width:18px;height:18px;fill:currentColor}
.dl__txt{font-size:14px;font-weight:700}
.dl__flag{margin-left:auto;padding:3px 9px;border-radius:7px;font-size:11px;font-weight:700;background:#f4eef1;color:#9a7f8b}
.dl__item.is-pending{cursor:not-allowed;opacity:.72;border-style:dashed}
.dl__item.is-dim{opacity:.55}
.dl__note{margin-top:10px;font-size:11.5px;color:var(--ink-3)}
.dl__notice{font-size:12px;color:var(--ink-2);margin-bottom:12px}
.dl__card{border:1px solid var(--pink-line);border-radius:14px;padding:13px;min-width:0}
.dl__card.is-recommended{border:2px solid var(--theme);background:rgba(255,95,158,.04)}
.dl__heading{display:flex;align-items:center;gap:9px;flex-wrap:wrap}
.dl__open{display:block;margin-top:12px;padding:11px 12px;text-align:center;background:var(--theme-deep);color:#fff;border-radius:10px;text-decoration:none;font-weight:700;font-size:14px;overflow-wrap:anywhere}
.dl__search{font-size:12px;margin-top:12px;color:var(--ink-2)}
.dl__search-row{display:flex;gap:9px;align-items:center;flex-wrap:wrap;margin-top:5px}
.dl__word{font-weight:800;overflow-wrap:anywhere;user-select:text;min-width:0;flex:1}
.dl__copy{font:inherit;font-size:12px;border:1px solid var(--pink-line);border-radius:8px;background:#fff;color:var(--theme-deep);padding:7px 10px;cursor:pointer}
.dl__instructions{white-space:pre-line;overflow-wrap:anywhere;font-size:12px;color:var(--ink-2);margin-top:9px}
.modal__body .download-panel{padding:25px 18px 20px}
.modal__body .download-panel .card__title{padding-right:32px}
.tracking-settings{display:block;align-self:center;font:inherit;font-size:12px;color:var(--ink-2);border:0;background:transparent;text-decoration:underline;cursor:pointer;padding:10px}
.tracking-choice{position:fixed;z-index:55;left:50%;transform:translateX(-50%);bottom:calc(var(--bar-h) + 24px);width:min(440px,calc(100% - 28px));max-height:50vh;overflow:auto;background:white;padding:16px;border:1px solid var(--pink-line);border-radius:16px;box-shadow:0 5px 24px #0003;font-size:13px;color:var(--ink)}
.tracking-choice__actions{display:flex;gap:10px;margin-top:12px}
.tracking-choice__actions button{flex:1;padding:10px;border:1px solid var(--pink-line);border-radius:9px;background:#fff;color:var(--ink);font:inherit;cursor:pointer}
.tracking-choice__actions button:first-child{background:var(--theme-deep);color:#fff}

/* ---------------- 9. 联系与政策 ---------------- */
.info__row{display:flex;gap:10px;font-size:13.5px;color:var(--ink-2);padding:4px 0}
.info__k{flex:none;width:5.5em;color:var(--ink-3)}
.policy-links{display:flex;flex-wrap:wrap;gap:9px;margin-top:12px}
.policy-links button{
  border:1.5px solid var(--pink-line);background:#fff;color:var(--theme-deep);
  font:inherit;font-size:12.5px;font-weight:700;padding:7px 13px;border-radius:999px;cursor:pointer;
}
.foot{text-align:center;font-size:11px;color:#8d5f77;padding:18px 0 6px;line-height:1.8}

/* 预览模式下：链接目标不存在的主按钮 */
.cta-main.is-dead,.bar__btn.is-dead{
  background:#fff;color:var(--ink-3);border-color:rgba(255,255,255,.6);
  box-shadow:var(--shadow-card);font-size:12px;font-weight:600;cursor:not-allowed;
}

/* 后台预览时说明区块为什么被隐藏 */
.hidden-note{
  border:1px dashed #d9a9c0;border-radius:var(--radius-sm);
  background:rgba(255,255,255,.6);padding:11px 13px;font-size:12px;color:#8a5570;
}

/* ---------------- 底部固定操作栏 ---------------- */
.bar{
  position:fixed;left:0;right:0;bottom:0;z-index:40;
  padding:9px 12px calc(9px + env(safe-area-inset-bottom,0px));
  background:rgba(255,255,255,.95);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  border-top:1px solid var(--line);
}
.bar__inner{width:min(100%, var(--maxw));margin-inline:auto}
.bar__btn{
  /* button 元素的 width:auto 是收缩宽度，与 a 表现不一致，这里显式铺满 */
  width:100%;display:flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 16px;border:3px solid #fff;border-radius:18px;
  font-size:15px;font-weight:800;color:#fff;text-decoration:none;cursor:pointer;
  background:linear-gradient(135deg,var(--theme),var(--theme-deep));
  box-shadow:var(--shadow-btn);font-family:inherit;
}
.bar__btn--pending{background:#fff;border-color:rgba(255,255,255,.6);color:var(--ink-3);box-shadow:var(--shadow-card);cursor:not-allowed}

/* ---------------- 弹窗 ---------------- */
.modal{position:fixed;inset:0;z-index:60;display:grid;place-items:center;padding:14px}
.modal__backdrop{position:absolute;inset:0;background:rgba(48,14,32,.6)}
.modal__panel{
  position:relative;width:min(100%, var(--maxw));max-height:calc(100dvh - 32px);
  background:#fff;border-radius:var(--radius);box-shadow:0 24px 60px -24px rgba(60,10,40,.6);
  display:flex;flex-direction:column;overflow:hidden;
}
.modal__close{
  position:absolute;top:9px;right:9px;z-index:5;
  width:34px;height:34px;border:0;border-radius:50%;cursor:pointer;
  background:rgba(255,255,255,.93);color:#5a2b42;display:grid;place-items:center;
  box-shadow:0 1px 6px rgba(90,20,60,.22);
}
.modal__close svg{width:16px;height:16px;fill:currentColor}
.modal__body{overflow:auto;-webkit-overflow-scrolling:touch}

/* 文本弹窗 */
.doc{padding:22px 18px 20px}
.doc__img{display:block;width:100%;border-radius:12px;margin-bottom:13px;background:#ffe9f2}
.doc__link{
  display:inline-flex;align-items:center;gap:6px;margin-top:14px;
  padding:10px 18px;border-radius:999px;text-decoration:none;
  background:linear-gradient(135deg,var(--theme),var(--theme-deep));
  color:#fff;font-size:13.5px;font-weight:800;
  box-shadow:0 8px 18px -10px rgba(232,64,127,.9);
}
.doc h3{font-size:16px;font-weight:800;padding-left:11px;position:relative;margin-bottom:10px}
.doc h3::before{
  content:"";position:absolute;left:0;top:.28em;width:3.5px;height:1em;border-radius:2px;
  background:linear-gradient(180deg,var(--theme),var(--theme-deep));
}
.doc p{font-size:13.5px;color:var(--ink-2);white-space:pre-line}

/* 图集浏览 */
.carousel{display:flex;flex-direction:column;background:#2b1020}
.carousel__stage{position:relative;background:#2b1020;aspect-ratio:1/1;display:grid;place-items:center}
.carousel__stage img{width:100%;height:100%;object-fit:contain}
.carousel__nav{
  position:absolute;top:50%;transform:translateY(-50%);
  width:38px;height:38px;border:0;border-radius:50%;cursor:pointer;
  background:rgba(0,0,0,.45);color:#fff;display:grid;place-items:center;
}
.carousel__nav svg{width:17px;height:17px;fill:currentColor}
.carousel__nav[data-dir="prev"]{left:9px}
.carousel__nav[data-dir="next"]{right:9px}
.carousel__meta{padding:11px 15px 4px;color:#fff}
.carousel__cap{font-size:13.5px;font-weight:600}
.carousel__count{font-size:11.5px;color:#d9b6c8;margin-top:3px}
.carousel__dots{display:flex;gap:6px;justify-content:center;padding:10px 15px 13px}
.carousel__dot{width:6px;height:6px;border-radius:50%;background:rgba(255,255,255,.35);border:0;padding:0}
.carousel__dot[aria-current="true"]{background:#fff;width:17px;border-radius:999px}

/* ---------------- 轻提示 ---------------- */
.toast{
  position:fixed;left:50%;bottom:calc(var(--bar-h) + 20px);transform:translate(-50%,10px);z-index:70;
  max-width:calc(100% - 40px);padding:10px 17px;border-radius:999px;
  background:#33202b;color:#fff;font-size:13px;text-align:center;
  box-shadow:0 14px 30px -14px rgba(0,0,0,.5);
  opacity:0;transition:opacity .18s ease,transform .18s ease;
}
.toast.is-on{opacity:1;transform:translate(-50%,0)}

/* ---------------- 桌面端：仍然是居中窄版 ---------------- */
@media (min-width:700px){
  #app{padding-top:24px;gap:13px}
  .bar{
    left:50%;right:auto;bottom:16px;transform:translateX(-50%);
    width:min(100% - 24px, var(--maxw));
    border:1px solid var(--line);border-radius:var(--radius);
    background:rgba(255,255,255,.96);padding:9px;
  }
  body{padding-bottom:calc(var(--bar-h) + 40px)}
}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{transition-duration:.001ms !important;animation-duration:.001ms !important}
}