/* ===== 胖平 · 城市陆冲社区 —— 样式表 ===== */
:root{
  --navy:#15171c;
  --navy-2:#1f2530;
  --ivory:#f7f8fa;
  --alt:#eef1f5;
  --accent:#0a6cff;
  --teal:#0fa191;
  --ink:#15171c;
  --muted:#5f6672;
  --line:#e6e8eb;
  --shadow:0 18px 50px rgba(21,23,28,.12);
  --radius:18px;
  --maxw:1180px;
  --font:"Segoe UI",system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font);color:var(--ink);background:var(--ivory);line-height:1.7;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}

/* ===== 顶部导航 ===== */
.site-header{position:sticky;top:0;z-index:50;display:flex;align-items:center;justify-content:space-between;
  padding:14px clamp(16px,4vw,40px);background:rgba(247,245,241,.92);backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line)}
.brand{font-weight:800;font-size:1.25rem;letter-spacing:.04em;color:var(--navy)}
.brand span{font-size:.62rem;letter-spacing:.28em;color:var(--muted);font-weight:600;margin-left:.4rem}
.nav-toggle{font-size:1.5rem;background:none;border:0;cursor:pointer;color:var(--navy);display:none}
.site-nav{display:flex;gap:clamp(14px,2.4vw,34px)}
.site-nav a{font-size:.95rem;color:var(--muted);font-weight:500;transition:color .2s;padding:6px 0;position:relative}
.site-nav a:hover,.site-nav a.active{color:var(--navy)}
.site-nav a.active::after{content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;background:var(--accent)}

/* ===== Hero ===== */
.hero{position:relative;min-height:92vh;display:flex;align-items:center;justify-content:center;text-align:center;color:#fff;overflow:hidden}
.hero-bg{position:absolute;inset:0;
  background:radial-gradient(120% 90% at 70% 40%, rgba(15,158,146,.55), transparent 60%),
            linear-gradient(160deg,var(--navy),var(--navy-2))}
.hero-bg::after{content:"";position:absolute;inset:0;
  background:url("../assets/images/hero.jpg") center/cover no-repeat;
  mix-blend-mode:multiply;opacity:.9}
.hero-inner{position:relative;padding:0 20px;z-index:1}
.hero-kicker{letter-spacing:.4em;font-size:.8rem;text-transform:uppercase;color:#cfe9e6;margin-bottom:18px}
.hero h1{font-size:clamp(2.6rem,8vw,5.6rem);font-weight:800;line-height:1.04;letter-spacing:-.02em;margin-bottom:18px}
.hero-slogan{font-size:clamp(1.5rem,4.5vw,2.6rem);font-weight:700;line-height:1.14;color:#8fe6dc;margin-bottom:22px;letter-spacing:.01em}
.hero-sub{font-size:clamp(1rem,2.4vw,1.35rem);color:#e7eef3;max-width:620px;margin:0 auto 34px}
.hero-cta{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.btn-primary,.btn-ghost{display:inline-block;padding:13px 28px;border-radius:40px;font-weight:600;font-size:.98rem;transition:.2s}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{background:#ff5a37;transform:translateY(-2px)}
.btn-ghost{border:1.5px solid rgba(255,255,255,.6);color:#fff}
.btn-ghost:hover{border-color:#fff;background:rgba(255,255,255,.08)}
.hero-stats{display:flex;gap:clamp(20px,5vw,56px);justify-content:center;margin-top:46px;flex-wrap:wrap}
.hero-stats div{display:flex;flex-direction:column}
.hero-stats b{font-size:clamp(1.8rem,4vw,2.6rem);font-weight:800;color:#fff}
.hero-stats span{font-size:.8rem;color:#bcd3dd;letter-spacing:.05em}

/* ===== 通用 block ===== */
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 clamp(16px,4vw,40px)}
.block{padding:clamp(56px,9vw,110px) 0}
.block-alt{background:var(--alt)}
.eyebrow{letter-spacing:.22em;font-size:.78rem;text-transform:uppercase;color:var(--teal);font-weight:700;margin-bottom:14px}
.block-title{font-size:clamp(1.8rem,4.5vw,3rem);font-weight:800;letter-spacing:-.02em;line-height:1.08}
.lead{max-width:640px;color:var(--muted);font-size:1.05rem;margin-top:18px}
.sub-title{font-size:clamp(1.3rem,3vw,1.9rem);font-weight:700;margin:48px 0 22px}

/* 带摄影背景的板块 */
.photo-sec{position:relative;background-size:cover;background-position:center;background-attachment:fixed}
.photo-sec::before{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(21,23,28,.62),rgba(21,23,28,.41))}
.photo-sec .wrap{position:relative;z-index:1}
.photo-sec .block-title,.photo-sec .eyebrow,.photo-sec .lead{color:#fff}
#tutorials.photo-sec{background-image:url("../assets/images/tutorials.jpg")}
#spots.photo-sec{background-image:url("../assets/images/spots.jpg")}
#communities.photo-sec{background-image:url("../assets/images/communities.jpg")}

/* ===== 认识陆冲 ===== */
.about-hero{position:relative;border-radius:var(--radius);overflow:hidden;min-height:300px;display:flex;flex-direction:column;justify-content:flex-end;padding:34px clamp(18px,4vw,40px);margin-bottom:30px;background:linear-gradient(rgba(21,23,28,.32),rgba(21,23,28,.8)),url("../assets/images/about.jpg") center/cover no-repeat}
.about-hero .eyebrow{color:#9fe6dc;margin-bottom:10px}
.about-hero .block-title{color:#fff;max-width:760px}
@media (max-width:600px){.about-hero{min-height:220px;padding:24px 18px}}
/* ===== 板块通用视觉头图（教程库/场地/社群 与认识陆冲统一风格） ===== */
.block-hero{position:relative;border-radius:var(--radius);overflow:hidden;min-height:320px;display:flex;flex-direction:column;justify-content:flex-end;padding:40px clamp(18px,4vw,44px);margin-bottom:30px}
.block-hero .eyebrow{color:#9fe6dc;margin-bottom:12px;font-size:.88rem;letter-spacing:.28em;text-shadow:0 1px 8px rgba(0,0,0,.5)}
.block-hero .block-title{color:#fff;max-width:760px;text-shadow:0 2px 16px rgba(0,0,0,.65),0 1px 4px rgba(0,0,0,.4);line-height:1.12}
#tutorials .block-hero{background:linear-gradient(rgba(21,23,28,.45),rgba(21,23,28,.9)),url("../assets/images/tutorials.jpg") center/cover no-repeat}
#spots .block-hero{background:linear-gradient(rgba(21,23,28,.45),rgba(21,23,28,.9)),url("../assets/images/spots.jpg") center/cover no-repeat}
#communities .block-hero{background:linear-gradient(rgba(21,23,28,.45),rgba(21,23,28,.9)),url("../assets/images/communities.jpg") center/cover no-repeat}
@media (max-width:600px){.block-hero{min-height:220px;padding:24px 18px}}
.about-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:20px;margin-top:38px}
.info-card{background:rgba(255,255,255,.92);border:1px solid var(--line);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow)}
.info-card h3{font-size:1.15rem;margin-bottom:10px;color:var(--navy)}
.info-card p{color:var(--muted);font-size:.97rem}

/* ===== 入门准备 ===== */
.prep-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:20px;margin-top:34px}
.prep-card{background:rgba(255,255,255,.92);border:1px solid var(--line);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow)}
.prep-ico{font-size:2rem;display:block;margin-bottom:12px}
.prep-card h3{font-size:1.1rem;margin-bottom:8px;color:var(--navy)}
.prep-card p{color:var(--muted);font-size:.96rem}

/* ===== 练习顺序（手风琴） ===== */
.seq-list{margin-top:30px;border-top:1px solid var(--line)}
.move-toggle{width:100%;display:flex;align-items:center;gap:12px;text-align:left;
  background:rgba(255,255,255,.92);border:0;border-bottom:1px solid var(--line);
  padding:20px 4px;font-size:clamp(1.05rem,2.5vw,1.35rem);font-weight:700;color:var(--navy);cursor:pointer}
.move-toggle:hover{color:var(--accent)}
.mt-icon{font-size:1.2rem}
.mt-arrow{margin-left:auto;transition:transform .25s;color:var(--muted)}
.move-toggle[aria-expanded="true"] .mt-arrow{transform:rotate(180deg)}
.move-detail[hidden]{display:none}
.move-detail{padding:26px 4px;background:var(--alt);border-bottom:1px solid var(--line)}
.detail-lead{max-width:620px;color:var(--ink);font-size:1.02rem;margin-bottom:18px}
.detail-media{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.ph-img{aspect-ratio:16/9;background:linear-gradient(135deg,#dfe7ee,#d3e0ea);border-radius:12px;
  display:flex;align-items:center;justify-content:center;color:var(--muted);font-size:.9rem;position:relative}
.ph-img::after{content:"实拍图占位";position:absolute;inset:0;display:flex;align-items:center;justify-content:center}
.detail-media figcaption{font-size:.85rem;color:var(--muted);margin-top:8px;text-align:center}
.detail-steps{margin:18px 0 0;padding-left:22px;color:var(--ink)}
.detail-steps li{margin:7px 0}
.tip{background:#fff;border-left:4px solid var(--teal);padding:14px 18px;border-radius:0 10px 10px 0;font-size:.95rem;color:var(--ink)}

/* ===== 数据驱动卡片网格 ===== */
.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:22px;margin-top:10px}
.data-card{background:rgba(255,255,255,.95);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow);transition:.2s}
.data-card:hover{transform:translateY(-4px);box-shadow:0 24px 60px rgba(21,23,28,.16)}
.data-card h3{font-size:1.1rem;margin-bottom:6px;color:var(--navy)}
.data-card .meta{font-size:.85rem;color:var(--muted);margin-bottom:12px}
.data-card p{font-size:.94rem;color:var(--ink)}
.data-card .tag{display:inline-block;background:var(--alt);color:var(--navy);font-size:.78rem;padding:3px 10px;border-radius:30px;margin:2px 4px 2px 0}
.cover-ph{aspect-ratio:16/10;border-radius:12px;background:linear-gradient(135deg,#e3edf3,#d3e0ea);
  display:flex;align-items:center;justify-content:center;color:var(--muted);font-size:.8rem;margin-bottom:14px}

/* 尺寸表 */
.size-table{width:100%;border-collapse:collapse;margin-top:10px;font-size:.95rem;overflow:hidden;border-radius:var(--radius);box-shadow:var(--shadow)}
.size-table th,.size-table td{border:1px solid var(--line);padding:12px 14px;text-align:left}
.size-table th{background:var(--navy);color:#fff;font-weight:600}
.size-table tr:nth-child(even) td{background:#fff}

/* 教程库（统合 / 单一） */
.tutorial-group-title{margin-top:42px;color:var(--navy)}
.tutorial-card{background:rgba(255,255,255,.95)}
.tutorial-video{margin-top:10px;display:inline-block}
/* ===== 详情页多视频切换 ===== */
.dv-videos{margin:10px 0 4px}
.dv-video-now{margin-bottom:14px}
.dv-video-now iframe{width:100%;aspect-ratio:16/9;border:0;border-radius:12px;background:#000}
.dv-video-now .btn-primary{margin-top:8px}
.dv-vi-hint{font-size:.82rem;color:#8a99a6;margin:10px 0 8px}
.dv-video-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:8px}
.dv-vi{display:flex;align-items:center;gap:10px;padding:10px 12px;border:1px solid var(--line);border-radius:10px;cursor:pointer;transition:.16s;background:rgba(255,255,255,.02)}
.dv-vi:hover{border-color:var(--accent);background:rgba(143,230,220,.06)}
.dv-vi.selected{border-color:var(--accent);background:rgba(143,230,220,.12)}
.dv-vi-plat{font-size:.72rem;color:#0c1116;background:var(--accent);padding:2px 8px;border-radius:20px;font-weight:700;flex:none}
.dv-vi-title{font-size:.9rem;color:#cdd8e0;line-height:1.4}

/* 场地 / 社群 卡片配图 */
.spot-card .cover-ph,.community-card .cover-ph{aspect-ratio:16/9;margin-bottom:16px}
.community-cover{aspect-ratio:16/9;background:url("../assets/images/communities.jpg") center/cover no-repeat;
  border-radius:12px;margin-bottom:16px;filter:brightness(.85)}

/* 社群主理人微信 + 二维码 */
.qr-box{width:120px;height:120px;margin:14px auto 6px;border:2px dashed var(--muted);border-radius:10px;
  display:flex;align-items:center;justify-content:center;color:var(--muted);font-size:.72rem;text-align:center;background:#fafafa}
.host-wechat{font-size:.92rem;color:var(--navy);font-weight:600;margin-top:8px}

/* ===== 页脚 + 支持（站长微信 / 打赏） ===== */
.site-footer{background:var(--navy);color:#dfe7ee;margin-top:40px;padding:48px 0 28px}
.footer-inner{display:flex;justify-content:space-between;align-items:flex-start;gap:30px;flex-wrap:wrap}
.footer-brand{font-weight:800;font-size:1.2rem;color:#fff}
.footer-sub{font-size:.88rem;color:#9fb4c2;margin-top:8px}
.footer-nav{display:flex;flex-wrap:wrap;gap:16px}
.footer-nav a{color:#bcd3dd;font-size:.92rem}
.footer-nav a:hover{color:#fff}
.footer-copy{text-align:center;font-size:.78rem;color:#7f93a2;margin-top:30px}
.footer-icp{text-align:center;font-size:.76rem;color:#9aa8b3;margin-top:6px}
.footer-icp a{color:#9aa8b3;text-decoration:none}
.footer-icp a:hover{color:#fff;text-decoration:underline}
.footer-disclaimer{text-align:center;font-size:.8rem;color:#8a99a6;line-height:1.85;max-width:560px;margin:18px auto 0;padding:0 16px}
/* ===== 鸣谢（电影字幕风格） ===== */
.footer-credits{text-align:center;padding:36px 20px 44px;margin-top:10px;border-top:1px solid rgba(255,255,255,.06);background:linear-gradient(180deg,transparent,rgba(15,18,24,.5))}
.credits-label{font-size:.9rem;color:#8fe6dc;letter-spacing:.12em;margin-bottom:14px;text-transform:uppercase;opacity:.85}
.credits-names{font-size:.88rem;color:#c8d4dc;line-height:1.9;max-width:520px;margin:0 auto;font-style:italic}

.footer-support{text-align:center;padding:34px 0 6px;border-top:1px solid rgba(255,255,255,.08);margin-top:8px}
.support-note{font-size:1.05rem;color:#cfe9e6;letter-spacing:.05em;margin-bottom:14px}
.host-wechat-line{color:#cfe9e6;font-size:.92rem;margin-bottom:18px}
.host-wechat-line span{color:#fff;font-weight:700}
.qr-row{display:flex;gap:30px;justify-content:center;flex-wrap:wrap}
.qr-item{display:flex;flex-direction:column;align-items:center;gap:8px}
.qr-item .qr-box{width:130px;height:130px;margin:0}
.qr-item .donate{background:rgba(10,108,255,.10)}

/* 回到顶部 */
.to-top{position:fixed;right:22px;bottom:22px;z-index:50;width:46px;height:46px;border-radius:50%;
  background:var(--navy);color:#fff;border:0;font-size:1.2rem;cursor:pointer;opacity:0;pointer-events:none;transition:.25s;box-shadow:var(--shadow)}
.to-top.show{opacity:1;pointer-events:auto}
/* ===== 详情页（前端视图切换） ===== */
.detail-view{position:fixed;inset:0;z-index:85;background:var(--ivory);overflow:auto;display:none}
.detail-view.open{display:block}
body.dv-open{overflow:hidden}
.dv-top{position:sticky;top:0;z-index:2;display:flex;justify-content:space-between;align-items:center;gap:10px;padding:13px 18px;background:rgba(247,248,250,.92);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.dv-back,.dv-share{font:inherit;font-size:.88rem;padding:8px 14px;border-radius:24px;border:1px solid var(--line);background:#fff;color:var(--navy);cursor:pointer;transition:.18s}
.dv-back:hover{background:var(--accent);color:#fff;border-color:var(--accent)}
.dv-share:hover{background:var(--teal);color:#fff;border-color:var(--teal)}
.dv-article{max-width:760px;margin:0 auto;padding-bottom:64px}
.dv-hero{position:relative;min-height:42vh;background-size:cover;background-position:center;background-color:#0f1216;display:flex;flex-direction:column;justify-content:flex-end;padding:30px 22px;color:#fff}
.dv-hero::after{content:"";position:absolute;inset:0;background:linear-gradient(transparent,rgba(21,23,28,.78))}
.dv-hero>*{position:relative;z-index:1}
.dv-badge{align-self:flex-start;font-size:.74rem;letter-spacing:.08em;padding:5px 11px;border-radius:20px;background:rgba(255,255,255,.18);border:1px solid rgba(255,255,255,.45);margin-bottom:12px}
.dv-title{font-size:1.9rem;font-weight:800;line-height:1.2;margin:0 0 8px}
.dv-byline{font-size:.95rem;opacity:.9;margin:0}
.dv-body{padding:24px 22px;color:var(--ink)}
.dv-lead{font-size:1.05rem;line-height:1.75;color:var(--ink);margin:0 0 22px}
.dv-foot{margin-top:26px;font-size:.82rem;color:var(--muted);border-top:1px solid var(--line);padding-top:14px}
.dv-muted{color:var(--muted);font-size:.92rem;margin:18px 0}
.dv-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:6px}
.dv-host{display:flex;gap:18px;align-items:center;margin:22px 0;padding:18px;background:#fff;border:1px solid var(--line);border-radius:16px}
.dv-hostqr{width:120px;height:120px;flex:0 0 auto;border-radius:12px;overflow:hidden;background:#eef0f3;display:flex;align-items:center;justify-content:center}
.dv-hostqr img{width:100%;height:100%;object-fit:cover}
.dv-hostlabel{font-size:.8rem;color:var(--muted);margin:0 0 4px}
.dv-wechat{font-size:1.15rem;font-weight:700;color:var(--navy);margin:0}

/* ===== 移动端 ===== */
@media (max-width:860px){
  .site-nav{position:fixed;top:0;right:0;height:100vh;width:min(78vw,320px);
    background:var(--ivory);flex-direction:column;padding:80px 28px;gap:6px;
    transform:translateX(100%);transition:transform .3s;z-index:60;box-shadow:-20px 60px rgba(0,0,0,.18)}
  .site-nav.open{transform:translateX(0)}
  .site-nav a{padding:14px 0;font-size:1.05rem;border-bottom:1px solid var(--line);width:100%}
  .nav-toggle{display:block;z-index:70}
  .detail-media{grid-template-columns:1fr}
  .photo-sec{background-attachment:scroll}
}
@media (max-width:600px){
  .prep-grid{grid-template-columns:1fr}
  .hero-stats{gap:24px}
  .size-table{font-size:.82rem}
  .qr-row{gap:18px}
}

/* 卡片配图（品牌/场地/社群/教程封面） */
.card-photo{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:12px;margin-bottom:16px;display:block}
.cover-ph.has-img{background-size:cover;background-position:center;filter:saturate(1.05)}
.community-cover.card-photo{aspect-ratio:16/9;filter:brightness(.9)}

/* 社群主理人二维码图 */
.qr-box{overflow:hidden}
.qr-img{width:100%;height:100%;object-fit:cover;border-radius:8px}
.qr-box span{position:relative;z-index:1}

/* 详情页内嵌视频 + 响应式 */
.dv-video-frame{position:relative;width:100%;padding-top:56.25%;border-radius:14px;overflow:hidden;background:#000;margin:8px 0 6px}
.dv-video-frame iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
@media (max-width:600px){
  .dv-title{font-size:1.5rem}
  .dv-hero{min-height:34vh}
}

/* ===== 场地投稿按钮 + 弹窗 ===== */
.block-actions{margin-top:18px}
.block-actions .btn-ghost{display:inline-flex;align-items:center;gap:6px;background:var(--accent);color:#fff;border:1.5px solid var(--accent);font-weight:700;letter-spacing:.02em;box-shadow:0 2px 12px rgba(0,180,160,.25)}
.block-actions .btn-ghost:hover{background:#00a894;border-color:#00a894;box-shadow:0 4px 20px rgba(0,180,160,.35);transform:translateY(-1px)}

.submit-modal{position:fixed;inset:0;z-index:9999;display:flex;align-items:center;justify-content:center;background:rgba(21,23,28,.55);padding:18px;backdrop-filter:blur(2px)}
.submit-modal[hidden]{display:none}
.submit-card{position:relative;width:100%;max-width:480px;max-height:88vh;overflow-y:auto;background:#fff;border-radius:var(--radius);padding:28px clamp(18px,4vw,32px);box-shadow:var(--shadow)}
.submit-card h3{font-size:1.25rem;color:var(--navy);margin-bottom:8px}
.submit-close{position:absolute;top:12px;right:16px;font-size:1.6rem;line-height:1;background:none;border:0;cursor:pointer;color:var(--muted)}
.submit-close:hover{color:var(--navy)}
.submit-tip{font-size:.88rem;color:var(--muted);margin-bottom:18px}
.submit-tip .req{color:#e0533d}
.submit-modal .field{margin-bottom:14px}
.submit-modal .field label{display:block;font-size:.82rem;color:var(--muted);font-weight:600;margin-bottom:5px}
.submit-modal .field .req{color:#e0533d}
.submit-modal .field input,.submit-modal .field select,.submit-modal .field textarea{width:100%;font:inherit;padding:9px 11px;border:1px solid var(--line);border-radius:9px;background:var(--ivory);color:var(--ink)}
.submit-modal .field textarea{resize:vertical;min-height:70px}
.submit-modal .hp{display:none}
.submit-msg{font-size:.86rem;min-height:1.2em;margin:4px 0 2px}
.submit-actions{display:flex;gap:10px;justify-content:flex-end;margin-top:8px}
.submit-actions .btn-primary,.submit-actions .btn-ghost{padding:10px 20px;font-size:.92rem;border-radius:30px;cursor:pointer;border:0}
.submit-actions .btn-ghost{background:var(--ivory);color:var(--muted);border:1px solid var(--line)}
.submit-actions .btn-primary{background:var(--accent);color:#fff}
.submit-actions .btn-primary:disabled{opacity:.6;cursor:not-allowed}
.submit-modal .img-row{display:flex;gap:12px;align-items:center;flex-wrap:wrap}
.submit-modal .img-prev{max-width:120px;max-height:80px;border-radius:8px;border:1px solid var(--line);object-fit:cover}
.submit-modal .field-hint{display:block;font-size:.74rem;color:var(--muted);margin-top:5px}