:root{
    --primary:#D81B60; --primary-light:#EC407A; --primary-lighter:#F8BBD9;
    --accent:#C2185B; --bg-start:#FFF5F7; --bg-end:#FFEBF0;
    --card-bg:#FFFFFF; --card-pink:#FFF8FA;
    --text-primary:#4A4A4A; --text-secondary:#757575; --text-strong:#333;
    --border:#EAD9E0; --border-dashed:#E8C5D0;
    --shadow:0 8px 32px rgba(216,27,96,.08); --shadow-sm:0 2px 12px rgba(216,27,96,.06);
    --radius-lg:20px; --radius-md:16px; --radius-sm:12px; --radius-pill:24px;
    --gradient-hero:linear-gradient(135deg,#FCE4EC 0%,#F8BBD9 50%,#F48FB1 100%);
  }
  *{margin:0;padding:0;box-sizing:border-box;-webkit-tap-highlight-color:transparent}
  html{scroll-behavior:smooth;overflow-x:hidden;-webkit-text-size-adjust:100%;text-size-adjust:100%}
  body{
    font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"PingFang SC","Microsoft YaHei",sans-serif;
    color:var(--text-primary); background:#fff; line-height:1.6;
    overflow-x:hidden;width:100%;max-width:100%;
  }
  img,svg,video{max-width:100%;height:auto}
  .wrap{max-width:1160px;margin:0 auto;padding:0 24px;width:100%}
  a{text-decoration:none;color:inherit}

  /* ===== NAV ===== */
  /* H5/PC 均 fixed：html/body overflow-x 会让 sticky 在移动端失效 */
  #nav{
    position:fixed;top:0;left:0;right:0;width:100%;z-index:100;
    padding-top:env(safe-area-inset-top,0px);
  }
  body.has-nav,body:has(> #nav){
    padding-top:calc(64px + env(safe-area-inset-top,0px));
  }
  html{scroll-padding-top:calc(64px + env(safe-area-inset-top,0px))}
  nav{background:rgba(255,255,255,.92);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
    border-bottom:1px solid var(--border)}
  .nav-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
  .logo{display:flex;align-items:center;gap:12px;color:var(--text-strong)}
  .logo .mark-wrap{display:inline-flex;align-items:center;justify-content:center;height:48px;width:48px;flex-shrink:0;
    border-radius:12px;overflow:hidden;background:#000;
    box-shadow:0 2px 8px rgba(0,0,0,.18)}
  .logo img.mark{display:block;height:100%;width:100%;object-fit:cover}
  .logo .brand{font-weight:700;font-size:17px;letter-spacing:.2px;display:flex;align-items:baseline;gap:6px;color:var(--text-strong)}
  .logo .brand em{font-style:italic;font-weight:500;color:var(--primary);font-family:"Brush Script MT","Snell Roundhand","Segoe Script",cursive;font-size:18px}
  .nav-links{display:flex;gap:28px;font-size:14px;color:var(--text-secondary)}
  .nav-links a:hover{color:var(--primary)}
  .btn{display:inline-flex;align-items:center;gap:8px;border-radius:var(--radius-pill);
    padding:10px 22px;font-size:14px;font-weight:600;cursor:pointer;border:none;transition:.2s}
  .btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary-light));color:#fff;
    box-shadow:0 6px 18px rgba(216,27,96,.28)}
  .btn-primary:hover{transform:translateY(-1px);box-shadow:0 10px 24px rgba(216,27,96,.34)}
  .btn-ghost{background:#fff;color:var(--primary);border:1px solid var(--primary-lighter)}
  .btn-ghost:hover{background:var(--card-pink)}

  /* ===== HERO ===== */
  .hero{padding:72px 0 64px;background:linear-gradient(180deg,var(--bg-start),#fff);overflow:hidden}
  .hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
  .hero-grid > *{min-width:0;max-width:100%}
  .eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;color:var(--primary);
    background:var(--card-pink);border:1px solid var(--border-dashed);padding:6px 14px;border-radius:var(--radius-pill);font-weight:600}
  h1{font-size:46px;line-height:1.22;color:var(--text-strong);margin:18px 0 16px;font-weight:700;letter-spacing:-.5px}
  h1 .hl{color:var(--primary)}
  .hero p.lead{font-size:17px;color:var(--text-secondary);max-width:460px;margin-bottom:28px}
  .hero-cta{display:flex;gap:14px;flex-wrap:wrap}
  .trust{margin-top:22px;font-size:13px;color:var(--text-tertiary,#9E9E9E)}

  /* 邀请链接落地条（?invite=） */
  .invite-banner{margin:0 0 20px}
  .invite-banner[hidden]{display:none!important}
  .invite-banner-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;
    padding:18px 20px;border-radius:var(--radius-lg);border:1px solid var(--border-dashed);
    background:linear-gradient(135deg,#FFF5F7,#fff);box-shadow:var(--shadow-sm)}
  .invite-banner-title{font-size:16px;font-weight:700;color:var(--text-strong);margin-bottom:4px}
  .invite-banner-desc{font-size:13px;color:var(--text-secondary);line-height:1.5;margin-bottom:8px}
  .invite-banner-desc strong{color:var(--primary);font-weight:700}
  .invite-banner-code{font-size:14px;color:var(--text-primary)}
  .invite-banner-code b{color:var(--primary);letter-spacing:1px;font-weight:800}
  .invite-copy-btn{flex:0 0 auto;white-space:nowrap}

  /* hero 公告栏（替代原来的手机 mockup） */
  .hero-announce{display:flex;flex-direction:column;gap:12px;align-self:stretch;min-width:0;max-width:100%;width:100%}
  .hero-announce .anc-top{margin:0;padding:18px 20px;font-size:13px;position:relative;
    box-shadow:0 10px 30px rgba(216,27,96,.22);max-width:100%;overflow:hidden}
  .hero-announce .anc-top h3{font-size:16px;line-height:1.4;margin:6px 0 4px;padding-right:0;
    word-break:break-word;overflow-wrap:anywhere}
  .hero-announce .anc-top p{font-size:12.5px;line-height:1.55;margin:0;opacity:.95;display:-webkit-box;
    -webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;word-break:break-word}
  .hero-announce .anc-top .anc-date{position:absolute;top:14px;right:16px;font-size:11px;opacity:.85}
  .hero-ann-list{background:#fff;border:1px solid var(--border);border-radius:var(--radius-lg);
    padding:8px;box-shadow:var(--shadow-sm);display:flex;flex-direction:column;gap:2px;
    min-width:0;max-width:100%;overflow:hidden}
  .anc-item{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:10px;
    text-decoration:none;color:var(--text-primary);transition:.15s;min-width:0;max-width:100%}
  .anc-item:hover{background:var(--card-pink)}
  .anc-item .chip{flex:0 0 auto;font-size:10px;font-weight:600;padding:2px 7px;border-radius:5px;
    line-height:1.5;letter-spacing:.5px}
  .anc-item .title{flex:1 1 auto;min-width:0;font-size:13.5px;color:var(--text-strong);line-height:1.4;
    white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
  .anc-item .date{flex:0 0 auto;font-size:11px;color:var(--text-tertiary,#9E9E9E);white-space:nowrap}
  .chip.ev-event{background:#FFE4EC;color:#C2185B}
  .chip.ev-version{background:#EDE7F6;color:#5E35B1}
  .chip.ev-system{background:#E0E0E0;color:#616161}

  /* ===== SECTION ===== */
  section.block{padding:72px 0}
  .sec-head{text-align:center;max-width:620px;margin:0 auto 44px}
  .sec-head .k{font-size:13px;font-weight:700;color:var(--primary);letter-spacing:1px}
  .sec-head h2{font-size:32px;color:var(--text-strong);margin:10px 0 12px;font-weight:700}
  .sec-head p{font-size:15px;color:var(--text-secondary)}

  /* features：5 卡，桌面 3+2 居中 */
  .feat-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:18px}
  .feat{background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius-lg);
    padding:22px 18px;box-shadow:var(--shadow-sm);transition:.22s;grid-column:span 2}
  .feat:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
  .feat:nth-child(4){grid-column:2/span 2}
  .feat:nth-child(5){grid-column:4/span 2}
  .feat .ic{width:48px;height:48px;border-radius:14px;background:var(--card-pink);
    display:flex;align-items:center;justify-content:center;color:var(--primary);margin-bottom:14px}
  .feat .ic svg{width:24px;height:24px}
  .feat h3{font-size:15px;color:var(--text-strong);margin-bottom:8px;font-weight:700}
  .feat p{font-size:12.5px;color:var(--text-secondary);line-height:1.65}

  /* stories：5 列真实反馈 */
  .story-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:16px}
  .story{background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius-md);
    padding:22px 18px;box-shadow:var(--shadow-sm);transition:.2s}
  .story:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
  .story .stars{color:var(--primary);font-size:12px;letter-spacing:2px;margin-bottom:10px}
  .story .quote{font-size:14px;color:var(--text-strong);font-weight:700;margin-bottom:8px;line-height:1.45}
  .story .body{font-size:12.5px;color:var(--text-secondary);line-height:1.65;margin-bottom:0}

  /* about */
  .about-card{background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius-lg);
    padding:38px 42px;box-shadow:var(--shadow-sm);max-width:880px;margin:0 auto}
  .about-card .about-lead{font-size:20px;color:var(--text-strong);line-height:1.6;margin-bottom:16px}
  .about-card .about-lead b{color:var(--primary)}
  .about-card p{font-size:15px;color:var(--text-secondary);line-height:1.95;margin-bottom:12px}
  .about-card p:last-child{margin-bottom:0}

  /* stats */
  .stats{background:linear-gradient(180deg,var(--bg-start),var(--bg-end));border-radius:var(--radius-lg);
    padding:44px 32px;display:grid;grid-template-columns:repeat(4,1fr);gap:20px;text-align:center}
  .stat .n{font-size:38px;font-weight:700;color:var(--primary)}
  .stat .l{font-size:14px;color:var(--text-secondary);margin-top:4px}

  /* cta */
  .cta-band{background:var(--gradient-hero);border-radius:28px;padding:56px 40px;text-align:center;color:#fff;
    box-shadow:var(--shadow)}
  .cta-band h2{font-size:32px;margin-bottom:12px;color:#fff}
  .cta-band p{font-size:16px;opacity:.95;margin-bottom:26px}
  .cta-band .btn-primary{background:#fff;color:var(--primary);box-shadow:0 10px 30px rgba(0,0,0,.12)}
  .cta-band .btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.7)}
  .qr{margin:26px auto 0;width:104px;height:104px;background:#fff;border-radius:14px;
    display:flex;align-items:center;justify-content:center;color:var(--primary-light);font-size:12px}

  /* buttons extra */
  .btn-outline{background:transparent;color:var(--primary);border:1px solid var(--primary-lighter);font-weight:600}
  .btn-outline:hover{background:var(--card-pink);border-color:var(--primary)}
  .btn-ios{background:#000;color:#fff;box-shadow:0 6px 18px rgba(0,0,0,.18)}
  .btn-ios:hover{transform:translateY(-1px);box-shadow:0 10px 24px rgba(0,0,0,.24)}
  .btn-ios-outline{background:#fff;color:#000;border:1.5px solid #000;box-shadow:none}
  .btn-ios-outline:hover{background:#000;color:#fff}

  /* download steps (iOS two-step) */
  .dl-steps{text-align:left;display:flex;flex-direction:column;gap:10px;margin-bottom:10px}
  .dl-step{display:flex;align-items:center;gap:12px;padding:12px 14px;
    background:linear-gradient(135deg,#FFF5F7,#FCE4EC);border:1px solid #F8BBD9;
    border-radius:14px}
  .dl-step-num{width:26px;height:26px;border-radius:50%;background:#000;color:#fff;
    display:flex;align-items:center;justify-content:center;font-weight:700;font-size:13px;flex-shrink:0}
  .dl-step-body{flex:1;min-width:0}
  .dl-step-title{font-size:13px;font-weight:700;color:var(--text-strong);line-height:1.3}
  .dl-step-desc{font-size:11px;color:var(--text-secondary);line-height:1.4;margin-top:2px}
  .dl-step .btn{padding:8px 12px;font-size:12px;flex-shrink:0;white-space:nowrap}
  .btn-android{background:linear-gradient(135deg,var(--primary),var(--primary-light));color:#fff;
    box-shadow:0 6px 18px rgba(216,27,96,.28)}
  .btn-android:hover{transform:translateY(-1px);box-shadow:0 10px 24px rgba(216,27,96,.34)}
  .btn-harmony{background:linear-gradient(135deg,#E65100,#FF8A65);color:#fff;
    box-shadow:0 6px 18px rgba(230,81,0,.28)}
  .btn-harmony:hover{transform:translateY(-1px);box-shadow:0 10px 24px rgba(230,81,0,.34)}
  .btn-harmony.is-disabled,.btn-harmony[aria-disabled="true"]{opacity:.45;pointer-events:none;box-shadow:none;transform:none}

  /* 官方公告区 */
  .anc-top{display:block;background:linear-gradient(135deg,#D81B60 0%,#EC407A 60%,#F48FB1 100%);
    color:#fff;padding:24px 28px;border-radius:var(--radius-lg);text-decoration:none;
    box-shadow:0 10px 28px rgba(216,27,96,.22);position:relative;overflow:hidden;margin-bottom:22px;
    transition:transform .2s,box-shadow .2s}
  .anc-top:hover{transform:translateY(-2px);box-shadow:0 14px 34px rgba(216,27,96,.32)}
  .anc-top::after{content:'';position:absolute;top:-30px;right:-30px;width:120px;height:120px;
    border-radius:50%;background:rgba(255,255,255,.12)}
  .anc-top::before{content:'';position:absolute;bottom:-40px;right:40px;width:90px;height:90px;
    border-radius:50%;background:rgba(255,255,255,.08)}
  .anc-top .row{display:flex;align-items:center;gap:10px;margin-bottom:8px;position:relative;z-index:1}
  .anc-top .badge{font-size:11px;font-weight:700;background:#fff;color:var(--primary);
    padding:3px 10px;border-radius:var(--radius-pill);letter-spacing:1px}
  .anc-top .imp{font-size:10px;font-weight:700;background:rgba(255,255,255,.2);
    padding:2px 8px;border-radius:var(--radius-pill);border:1px solid rgba(255,255,255,.4)}
  .anc-top h3{font-size:20px;font-weight:700;margin-bottom:6px;position:relative;z-index:1;
    word-break:break-word;overflow-wrap:anywhere;padding-right:72px}
  .anc-top p{font-size:14px;opacity:.92;line-height:1.6;max-width:560px;position:relative;z-index:1;
    word-break:break-word}
  .anc-top .anc-date{position:absolute;top:24px;right:28px;font-size:12px;opacity:.85;z-index:1}

  .anc-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
  .anc-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius-lg);
    padding:18px 20px;box-shadow:var(--shadow);position:relative;overflow:hidden;
    transition:transform .15s,box-shadow .15s;border-left:4px solid var(--primary)}
  .anc-card:hover{transform:translateY(-1px);box-shadow:0 10px 26px rgba(0,0,0,.06)}
  .anc-card.ev-event{border-left-color:#EC407A}
  .anc-card.ev-version{border-left-color:#7E57C2}
  .anc-card.ev-system{border-left-color:#90A4AE}
  .anc-card summary{cursor:pointer;list-style:none;display:block}
  .anc-card summary::-webkit-details-marker{display:none}
  .anc-card summary::after{content:'展开 ▾';position:absolute;bottom:16px;right:20px;
    font-size:11px;color:var(--primary);font-weight:600;opacity:0;transition:opacity .15s}
  .anc-card:hover summary::after{opacity:1}
  .anc-card[open] summary::after{content:'收起 ▴';opacity:1}
  .anc-card .row{display:flex;align-items:center;gap:8px;margin-bottom:8px;flex-wrap:wrap}
  .anc-card .cat{font-size:10px;font-weight:700;padding:2px 8px;border-radius:var(--radius-pill);letter-spacing:.5px}
  .anc-card.ev-event .cat{background:#FCE4EC;color:#C2185B}
  .anc-card.ev-version .cat{background:#EDE7F6;color:#5E35B1}
  .anc-card.ev-system .cat{background:#ECEFF1;color:#546E7A}
  .anc-card .date{font-size:11px;color:var(--text-secondary)}
  .anc-card h4{font-size:16px;color:var(--text-strong);font-weight:700;line-height:1.45;margin-bottom:6px}
  .anc-card .summary-txt{font-size:13px;color:var(--text-secondary);line-height:1.6;margin-bottom:0}
  .anc-card[open] .summary-txt{display:none}
  .anc-card .body{font-size:13px;color:var(--text-primary);line-height:1.75;
    margin-top:12px;padding-top:12px;border-top:1px dashed var(--border);display:none}
  .anc-card[open] .body{display:block}
  .anc-card .body p{margin-bottom:8px}
  .anc-card .body p:last-child{margin-bottom:0}
  .anc-card .body img{max-width:100%;height:auto;display:block;clear:both;float:none;margin:16px 0;border-radius:8px}
  .anc-card .body .highlight{background:var(--card-pink);color:var(--primary);
    padding:1px 6px;border-radius:4px;font-weight:600}

  @media(max-width:760px){
    .anc-grid{grid-template-columns:1fr}
    .anc-top{padding:20px 22px}
    .anc-top h3{font-size:18px;padding-right:0}
    .anc-top .anc-date{position:static;display:block;margin-top:8px}
  }

  /* download cards：iOS / Android / 鸿蒙 */
  .dl-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;max-width:1080px;margin:0 auto}
  @media(max-width:960px){
    .dl-grid{grid-template-columns:1fr;max-width:420px}
  }
  .dl-card{background:#fff;border-radius:var(--radius-lg);padding:32px 28px;
    box-shadow:var(--shadow);text-align:center;position:relative;overflow:hidden;
    border:1px solid var(--border)}
  .dl-card .tag{display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:700;
    color:var(--primary);background:var(--card-pink);padding:5px 12px;border-radius:var(--radius-pill);
    margin-bottom:14px;letter-spacing:.5px}
  .dl-card h3{font-size:22px;color:var(--text-strong);margin-bottom:6px}
  .dl-card .sub{font-size:13px;color:var(--text-secondary);margin-bottom:18px;min-height:36px}
  .dl-card .qr-img{width:180px;height:180px;border-radius:12px;background:#fff;margin:0 auto 8px;
    padding:0;border:1px solid var(--border);display:block;overflow:hidden;
    -webkit-touch-callout:default}
  .dl-card .qr-img img{width:100%;height:100%;object-fit:cover;display:block;
    -webkit-touch-callout:default !important;-webkit-user-select:none;user-select:none;
    pointer-events:auto;touch-action:manipulation}
  .dl-card .qr-img .qr-placeholder{width:100%;height:100%;background:
    repeating-conic-gradient(#333 0% 25%,#fff 0% 50%) 0 0/16px 16px;border-radius:6px;
    display:flex;align-items:center;justify-content:center;color:#666;font-size:10px;text-align:center;padding:6px;line-height:1.2}
  .dl-card .qr-hint{font-size:12px;color:var(--text-secondary);text-align:center;margin:0 0 14px}
  .dl-card .tip{font-size:12px;color:#999;margin-top:10px;line-height:1.5}
  .dl-card .tip b{color:var(--primary)}
  .dl-harmony-hero{width:180px;height:180px;margin:0 auto 22px;border-radius:12px;
    border:1px solid var(--border);background:linear-gradient(160deg,#FFF3E0,#FFCCBC);
    display:flex;align-items:center;justify-content:center;color:#E65100}

  /* float support button */
  .float-support{position:fixed;right:24px;bottom:32px;z-index:9999;display:flex;flex-direction:column;align-items:flex-end;gap:10px;transform:translateZ(0);-webkit-transform:translateZ(0)}
  .float-support .fs-btn{width:56px;height:56px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--primary-light));
    color:#fff;display:flex;align-items:center;justify-content:center;cursor:pointer;
    box-shadow:0 8px 24px rgba(216,27,96,.4);transition:.2s;border:none}
  .float-support .fs-btn:hover{transform:scale(1.06)}
  .float-support .fs-pop{position:absolute;right:0;bottom:70px;width:240px;background:#fff;border-radius:16px;
    padding:18px;box-shadow:0 12px 40px rgba(0,0,0,.12);border:1px solid var(--border);
    opacity:0;transform:translateY(8px) scale(.96);pointer-events:none;transition:.18s;transform-origin:bottom right}
  .float-support.open .fs-pop{opacity:1;transform:translateY(0) scale(1);pointer-events:auto}
  .float-support .fs-pop h4{font-size:14px;color:var(--text-strong);margin-bottom:10px;display:flex;align-items:center;gap:6px}
  .float-support .fs-pop .row{display:flex;align-items:center;gap:8px;font-size:12px;color:var(--text-secondary);padding:7px 0;border-top:1px dashed var(--border)}
  .float-support .fs-pop .row:first-of-type{border-top:none}
  .float-support .fs-pop .row b{color:var(--text-strong);font-weight:600}
  .float-support .fs-pop .row .copy{cursor:pointer;color:var(--primary);font-size:11px;padding:2px 8px;border:1px solid var(--primary-lighter);border-radius:8px;margin-left:auto}
  .float-support .fs-pop .row .copy:hover{background:var(--card-pink)}

  /* float support: ticket tab + form */
  .float-support .fs-pop{width:300px;max-height:80vh;overflow-y:auto}
  .fs-tabs{display:flex;gap:6px;margin-bottom:12px}
  .fs-tab{flex:1;font-size:12px;font-weight:600;padding:8px 0;text-align:center;border-radius:10px;
    cursor:pointer;color:var(--text-secondary);background:#FCE4EC;transition:.15s}
  .fs-tab.active{color:#fff;background:var(--primary)}
  .fs-panel{display:none}
  .fs-panel.active{display:block}
  .tk-field{text-align:left;margin-bottom:10px}
  .tk-field label{display:block;font-size:11px;font-weight:600;color:var(--text-strong);margin-bottom:4px}
  .tk-field input,.tk-field select,.tk-field textarea{width:100%;font-size:12px;padding:8px 10px;
    border:1px solid var(--border);border-radius:9px;font-family:inherit;color:var(--text-primary);
    background:#fff;box-sizing:border-box;outline:none}
  .tk-field input:focus,.tk-field select:focus,.tk-field textarea:focus{border-color:var(--primary)}
  .tk-field textarea{resize:vertical;min-height:52px}
  .tk-submit{width:100%;margin-top:4px;background:var(--primary);color:#fff;border:none;
    font-size:13px;font-weight:600;padding:10px 0;border-radius:10px;cursor:pointer;transition:.15s}
  .tk-submit:hover{background:var(--primary-light)}
  .tk-success{display:none;font-size:12px;color:#2e7d32;background:#E8F5E9;
    border:1px solid #C8E6C9;border-radius:10px;padding:10px;margin-bottom:10px;line-height:1.5}
  .tk-success b{color:#1b5e20}

  /* image upload (form) */
  .tk-file{display:flex;align-items:center;justify-content:center;gap:6px;
    font-size:11px;color:var(--text-secondary);padding:9px;
    border:1px dashed var(--primary-lighter);border-radius:9px;
    cursor:pointer;background:#FFF5F7;transition:.15s}
  .tk-file:hover{background:var(--card-pink);color:var(--primary);border-color:var(--primary)}
  .tk-file input{display:none}
  .tk-files{display:flex;flex-wrap:wrap;gap:6px;margin-top:6px}
  .tk-thumb{position:relative;width:40px;height:40px;border-radius:7px;
    background:#eee;background-size:cover;background-position:center;
    border:1px solid var(--border)}
  .tk-thumb .x{position:absolute;top:-5px;right:-5px;width:14px;height:14px;
    background:#e53935;color:#fff;border-radius:50%;font-size:10px;
    display:flex;align-items:center;justify-content:center;cursor:pointer;border:none;line-height:1}
  .tk-tip-mini{font-size:10px;color:#aaa;margin-top:4px;line-height:1.4}

  /* footer */
  footer{background:#fff;border-top:1px solid var(--border);padding:48px 0 28px;margin-top:72px}
  .foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px;margin-bottom:32px}
  .foot-grid h4{font-size:14px;color:var(--text-strong);margin-bottom:14px}
  .foot-grid a{display:block;font-size:13px;color:var(--text-secondary);margin-bottom:9px}
  .foot-grid a:hover{color:var(--primary)}
  .foot-about p{font-size:13px;color:var(--text-secondary);margin-top:12px;max-width:280px}
  .copyright{border-top:1px solid var(--border);padding-top:20px;font-size:12px;color:var(--text-secondary);
    display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px}

  @media(max-width:1100px){
    .story-grid{grid-template-columns:repeat(3,1fr)}
  }
  @media(max-width:880px){
    .wrap{padding:0 18px}
    .hero-grid{grid-template-columns:1fr;gap:36px}
    .feat-grid{grid-template-columns:repeat(2,1fr)}
    .feat,.feat:nth-child(4),.feat:nth-child(5){grid-column:auto/span 1}
    .story-grid{grid-template-columns:repeat(2,1fr)}
    .stats{grid-template-columns:repeat(2,1fr)}
    .foot-grid{grid-template-columns:1fr 1fr}
    h1{font-size:36px}
    .nav-links{display:none}
    .dl-grid{grid-template-columns:1fr;gap:18px}
    .float-support{right:14px;bottom:18px}
    .float-support .fs-btn{width:48px;height:48px}
    .float-support .fs-pop{width:min(300px,calc(100vw - 28px))}
    .hero-announce .anc-top .anc-date{position:static;display:block;margin-top:8px}
  }
  @media(max-width:560px){
    body.has-nav,body:has(> #nav){
      padding-top:calc(56px + env(safe-area-inset-top,0px));
    }
    html{scroll-padding-top:calc(56px + env(safe-area-inset-top,0px))}
    .wrap{padding:0 16px}
    .nav-inner{height:56px;gap:8px}
    .logo{min-width:0;gap:8px}
    .logo .brand{font-size:15px;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
    .logo .brand em{font-size:15px}
    .logo .mark-wrap{height:40px;width:40px;border-radius:10px}
    .btn-outline{display:none}
    .nav-inner > div:last-child .btn{padding:8px 14px;font-size:13px;flex-shrink:0}
    .hero{padding:40px 0 32px}
    h1{font-size:28px;line-height:1.28;word-break:break-word}
    .hero p.lead{font-size:15px;margin-bottom:22px;max-width:100%}
    .hero-cta{gap:10px}
    .hero-cta .btn{padding:10px 16px;font-size:13px}
    .sec-head{margin-bottom:32px;max-width:100%}
    .sec-head h2{font-size:22px}
    .sec-head p{font-size:14px}
    .feat-grid{grid-template-columns:1fr;gap:14px}
    .feat{padding:22px 18px}
    .feat h3{font-size:16px}
    .feat p{font-size:13px}
    .story-grid{grid-template-columns:1fr;gap:14px}
    .story{padding:20px}
    .stat .n{font-size:30px}
    .stats{gap:14px;padding:26px 16px}
    .cta-band{padding:32px 20px;border-radius:20px}
    .cta-band h2{font-size:24px}
    .cta-band p{font-size:14px}
    .dl-card{padding:24px 18px}
    .dl-card .qr-img{width:160px;height:160px;max-width:100%}
    .dl-harmony-hero{width:160px;height:160px;max-width:100%}
    .dl-card .sub{min-height:0}
    .invite-banner-inner{flex-direction:column;align-items:stretch}
    .invite-copy-btn{width:100%;justify-content:center}
    .foot-grid{grid-template-columns:1fr;gap:20px}
    .foot-about p{max-width:none}
    .dl-step{flex-wrap:wrap}
    .dl-step .btn{width:100%;justify-content:center}
    .copyright{flex-direction:column;gap:4px}
    .hero-announce .anc-top{padding:16px 16px}
    .hero-announce .anc-top h3{font-size:15px;padding-right:0}
    .hero-ann-list{padding:6px}
    .anc-item{gap:8px;padding:10px 8px}
    .anc-item .date{display:none}
    .anc-item .title{font-size:12.5px}
    .about-card{padding:26px 20px}
    .about-card .about-lead{font-size:17px}
    .about-card p{font-size:14px;line-height:1.85}
    .float-support{right:12px;bottom:16px}
    .float-support .fs-pop{width:min(300px,calc(100vw - 24px));right:0}
  }