/* ==========================================================================
   front.css —— 前台统一视觉层（产品介绍页 / 登录注册 / 用户中心）
   依赖：bootstrap 5.2.3 + font-awesome 6.4.0 + dapp.css（设计令牌 --brand 等）

   命令空间：
     .fr-*   前台通用（导航 / 落地页 / 认证 / 页脚）
     .uc-*   用户中心专用
   ========================================================================== */

/* ============================ 1. 站点顶栏 ============================ */
.fr-nav{
  position:sticky;top:0;z-index:1030;
  background:rgba(255,255,255,.72);
  backdrop-filter:saturate(180%) blur(20px);
  -webkit-backdrop-filter:saturate(180%) blur(20px);
  border-bottom:1px solid transparent;
  transition:border-color .2s ease, background .2s ease, box-shadow .2s ease;
}
.fr-nav.is-scrolled{
  background:rgba(255,255,255,.88);
  border-bottom-color:var(--line);
  box-shadow:0 6px 22px rgba(20,22,28,.05);
}
.fr-nav-inner{
  max-width:1180px;margin:0 auto;padding:0 24px;height:64px;
  display:flex;align-items:center;gap:18px;
}
.fr-brand{
  display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink-1);
  font-weight:750;font-size:16.5px;letter-spacing:-.3px;flex:0 0 auto;
}
.fr-brand-mark{
  width:32px;height:32px;border-radius:10px;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--brand),var(--brand-2));
  color:#fff;font-size:15px;box-shadow:0 5px 14px rgba(91,91,214,.32);
}
.fr-nav-links{display:flex;align-items:center;gap:4px;margin-left:8px}
.fr-nav-links a{
  padding:7px 12px;border-radius:10px;font-size:13.5px;font-weight:550;
  color:var(--ink-2);text-decoration:none;transition:.16s;
}
.fr-nav-links a:hover{background:#f4f5f9;color:var(--ink-1)}
.fr-nav-spacer{flex:1}
.fr-nav-right{display:flex;align-items:center;gap:10px}

.fr-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:7px;
  height:38px;padding:0 18px;border-radius:12px;border:1px solid transparent;
  font-size:13.5px;font-weight:600;text-decoration:none;cursor:pointer;
  transition:.18s;white-space:nowrap;
}
.fr-btn-primary{
  background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;
  box-shadow:0 6px 16px rgba(91,91,214,.28);
}
.fr-btn-primary:hover{transform:translateY(-1px);box-shadow:0 10px 22px rgba(91,91,214,.36);color:#fff}
.fr-btn-ghost{background:#fff;border-color:var(--line-2);color:var(--ink-1)}
.fr-btn-ghost:hover{border-color:var(--ink-3);color:var(--ink-1)}
.fr-btn-lg{height:46px;padding:0 24px;border-radius:14px;font-size:14.5px}
.fr-btn-block{width:100%}

.fr-avatar{
  width:34px;height:34px;border-radius:50%;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;
  font-size:12.5px;font-weight:700;flex:0 0 auto;overflow:hidden;
}
.fr-avatar img{width:100%;height:100%;object-fit:cover}
.fr-menu{
  border:1px solid var(--line)!important;border-radius:16px!important;
  box-shadow:0 18px 44px rgba(20,22,28,.14)!important;padding:6px;min-width:186px;
}
.fr-menu .dropdown-item{
  border-radius:10px;font-size:13.5px;padding:8px 11px;display:flex;align-items:center;gap:9px;color:var(--ink-1);
}
.fr-menu .dropdown-item:hover{background:#f5f6fa}
.fr-menu .dropdown-item i{width:15px;text-align:center;color:var(--ink-2);font-size:12.5px}
.fr-menu .dropdown-item.danger{color:var(--coral)}
.fr-menu .dropdown-item.danger i{color:var(--coral)}
.fr-menu-head{padding:9px 11px 7px;border-bottom:1px solid var(--line);margin-bottom:5px}
.fr-menu-head b{display:block;font-size:13.5px}
.fr-menu-head span{font-size:11.5px;color:var(--ink-3)}

.fr-nav-toggle{
  display:none;width:38px;height:38px;border:1px solid var(--line-2);background:#fff;
  border-radius:11px;align-items:center;justify-content:center;color:var(--ink-1);cursor:pointer;
}

/* ============================ 2. 落地页 ============================ */
.fr-hero{
  position:relative;overflow:hidden;
  padding:76px 0 66px;
  background:
    radial-gradient(760px 380px at 12% -10%, rgba(91,91,214,.13), transparent 62%),
    radial-gradient(620px 340px at 92% 6%, rgba(255,95,162,.11), transparent 60%),
    radial-gradient(520px 300px at 66% 88%, rgba(34,211,238,.10), transparent 62%),
    var(--bg);
}
.fr-wrap{max-width:1180px;margin:0 auto;padding:0 24px}
.fr-hero-grid{display:grid;grid-template-columns:minmax(0,1.02fr) minmax(0,.98fr);gap:52px;align-items:center}
.fr-eyebrow{
  display:inline-flex;align-items:center;gap:7px;height:30px;padding:0 13px;border-radius:99px;
  background:#fff;border:1px solid var(--line);font-size:12.5px;color:var(--ink-2);font-weight:550;
  box-shadow:0 3px 10px rgba(20,22,28,.05);
}
.fr-eyebrow i{color:var(--brand)}
.fr-hero h1{
  margin:20px 0 0;font-size:clamp(34px,4.2vw,52px);line-height:1.1;
  font-weight:800;letter-spacing:-1.4px;color:var(--ink-1);
}
.fr-hero h1 em{
  font-style:normal;
  background:linear-gradient(120deg,var(--brand),var(--pink));
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
}
.fr-hero-sub{margin:18px 0 0;font-size:16.5px;line-height:1.72;color:var(--ink-2);max-width:520px}
.fr-hero-cta{display:flex;gap:12px;flex-wrap:wrap;margin-top:30px}
.fr-hero-meta{display:flex;gap:26px;flex-wrap:wrap;margin-top:34px;padding-top:24px;border-top:1px solid var(--line-2)}
.fr-hero-meta div b{display:block;font-size:21px;font-weight:750;font-family:var(--font-num);letter-spacing:-.5px}
.fr-hero-meta div span{font-size:12.5px;color:var(--ink-2)}

/* Hero 右侧：产品视觉（DApp 风卡片堆叠） */
.fr-showcase{position:relative;min-height:400px}
.fr-card-stack{position:relative}
.fr-visual{
  background:#fff;border:1px solid var(--line);border-radius:26px;padding:20px;
  box-shadow:0 26px 60px rgba(20,22,28,.12);
}
.fr-visual-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}
.fr-visual-head b{font-size:14.5px;letter-spacing:-.2px}
.fr-visual-head span{font-size:11.5px;color:var(--ink-3)}
.fr-visual-hero{
  position:relative;overflow:hidden;border-radius:20px;padding:20px;color:#fff;
  background:linear-gradient(135deg,#5b5bd6,#8b5cf6 52%,#ff5fa2);
  box-shadow:0 14px 32px rgba(91,91,214,.30);
}
.fr-visual-hero::before{
  content:'';position:absolute;width:180px;height:180px;border-radius:50%;
  background:#22d3ee;filter:blur(42px);opacity:.5;top:-72px;right:-40px;
}
.fr-visual-hero>*{position:relative;z-index:2}
.fr-visual-hero .lbl{font-size:12px;opacity:.9;margin:0 0 7px}
.fr-visual-hero .num{font-size:31px;font-weight:800;font-family:var(--font-num);letter-spacing:-1px;line-height:1}
.fr-visual-hero .num span{font-size:13px;font-weight:600;opacity:.85;margin-left:5px}
.fr-visual-bar{height:6px;border-radius:99px;background:rgba(255,255,255,.26);margin-top:15px;overflow:hidden}
.fr-visual-bar i{display:block;height:100%;width:71%;border-radius:99px;background:#fff}
.fr-visual-bar-txt{display:flex;justify-content:space-between;font-size:11.5px;opacity:.88;margin-top:7px}
.fr-mini-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:14px}
.fr-mini{border:1px solid var(--line);border-radius:15px;padding:12px 11px;background:#fff}
.fr-mini .t{font-size:11.5px;color:var(--ink-2);display:flex;align-items:center;gap:6px}
.fr-mini .n{font-size:17px;font-weight:750;font-family:var(--font-num);letter-spacing:-.4px;margin-top:6px}
.fr-mini .t i{width:20px;height:20px;border-radius:7px;display:grid;place-items:center;font-size:10px}
.fr-mini-row{display:flex;align-items:center;gap:10px;padding:9px 0;border-top:1px solid var(--line);margin-top:12px}
.fr-mini-row:first-of-type{border-top:0}
.fr-mini-row .ic{width:30px;height:30px;border-radius:9px;display:grid;place-items:center;font-size:12.5px;flex:0 0 auto}
.fr-mini-row .nm{flex:1;min-width:0;font-size:12.5px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.fr-mini-row .sz{font-size:11.5px;color:var(--ink-3);font-family:var(--font-num)}
.fr-float-card{
  position:absolute;background:#fff;border:1px solid var(--line);border-radius:18px;
  box-shadow:0 18px 40px rgba(20,22,28,.13);padding:13px 15px;
}
.fr-float-card.a{left:-34px;bottom:34px;display:flex;align-items:center;gap:11px}
.fr-float-card.b{right:-26px;top:44px;text-align:center}
.fr-float-card .big{font-size:19px;font-weight:780;font-family:var(--font-num);letter-spacing:-.5px}
.fr-float-card .cap{font-size:11.5px;color:var(--ink-3)}

/* 通用区块 */
.fr-section{padding:76px 0}
.fr-section.alt{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.fr-sec-head{max-width:660px;margin:0 auto 44px;text-align:center}
.fr-sec-head .tag{
  display:inline-block;font-size:12px;font-weight:650;color:var(--brand);
  background:var(--brand-soft);border-radius:99px;padding:5px 13px;letter-spacing:.3px;
}
.fr-sec-head h2{margin:15px 0 0;font-size:clamp(26px,3vw,36px);font-weight:780;letter-spacing:-.9px}
.fr-sec-head p{margin:12px 0 0;font-size:15px;color:var(--ink-2);line-height:1.7}

.fr-feat-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.fr-feat{
  background:#fff;border:1px solid var(--line);border-radius:20px;padding:24px;
  transition:.22s;
}
.fr-feat:hover{transform:translateY(-3px);border-color:var(--line-2);box-shadow:0 16px 36px rgba(20,22,28,.08)}
.fr-feat-ic{
  width:44px;height:44px;border-radius:14px;display:grid;place-items:center;font-size:18px;margin-bottom:16px;
}
.fr-feat h3{margin:0 0 8px;font-size:16px;font-weight:700;letter-spacing:-.2px}
.fr-feat p{margin:0;font-size:13.5px;color:var(--ink-2);line-height:1.72}

/* 存储引擎 */
.fr-stor-grid{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:12px}
.fr-stor{
  background:#fff;border:1px solid var(--line);border-radius:16px;padding:16px 12px;text-align:center;
  font-size:12.5px;font-weight:600;color:var(--ink-1);transition:.2s;
}
.fr-stor:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-2px)}
.fr-stor i{display:block;font-size:20px;margin-bottom:9px;color:var(--brand)}

/* API 代码 */
.fr-code{
  background:#14161c;border-radius:20px;padding:22px;color:#e6e8ef;overflow-x:auto;
  box-shadow:0 22px 50px rgba(20,22,28,.24);
}
.fr-code pre{margin:0;font-family:var(--font-num);font-size:12.5px;line-height:1.85}
.fr-code .c-key{color:#8b5cf6}.fr-code .c-str{color:#10c8a0}.fr-code .c-cmt{color:#6b7080}.fr-code .c-fn{color:#3aa0ff}

/* FAQ */
.fr-faq{max-width:820px;margin:0 auto;display:flex;flex-direction:column;gap:10px}
.fr-faq-item{background:#fff;border:1px solid var(--line);border-radius:16px;overflow:hidden}
.fr-faq-q{
  width:100%;text-align:left;background:none;border:0;padding:16px 18px;font-size:14.5px;font-weight:620;
  color:var(--ink-1);display:flex;align-items:center;justify-content:space-between;gap:14px;cursor:pointer;
}
.fr-faq-q i{color:var(--ink-3);font-size:12px;transition:transform .2s}
.fr-faq-item.open .fr-faq-q i{transform:rotate(180deg)}
.fr-faq-a{display:none;padding:0 18px 17px;font-size:13.5px;color:var(--ink-2);line-height:1.78}
.fr-faq-item.open .fr-faq-a{display:block}

/* 底部 CTA */
.fr-cta{
  position:relative;overflow:hidden;border-radius:30px;padding:56px 44px;color:#fff;text-align:center;
  background:linear-gradient(135deg,#14161c,#2b2f42 55%,#3d3160);
  box-shadow:0 26px 60px rgba(20,22,28,.26);
}
.fr-cta::before{
  content:'';position:absolute;width:280px;height:280px;border-radius:50%;
  background:#5b5bd6;filter:blur(72px);opacity:.55;top:-110px;left:-60px;
}
.fr-cta::after{
  content:'';position:absolute;width:240px;height:240px;border-radius:50%;
  background:#ff5fa2;filter:blur(72px);opacity:.42;bottom:-120px;right:-40px;
}
.fr-cta>*{position:relative;z-index:2}
.fr-cta h2{margin:0;font-size:clamp(24px,3vw,34px);font-weight:780;letter-spacing:-.8px}
.fr-cta p{margin:13px 0 0;font-size:15px;opacity:.86}
.fr-cta .fr-hero-cta{justify-content:center}

/* 页脚 */
.fr-footer{background:#fff;border-top:1px solid var(--line);padding:38px 0 30px;margin-top:0}
.fr-footer-in{max-width:1180px;margin:0 auto;padding:0 24px;display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap}
.fr-footer p{margin:0;font-size:12.5px;color:var(--ink-3);line-height:1.9}
.fr-footer a{color:var(--ink-2);text-decoration:none;font-size:12.5px;margin-left:16px}
.fr-footer a:hover{color:var(--brand)}

/* ============================ 3. 认证页 ============================ */
.fr-auth{min-height:calc(100vh - 64px);display:grid;place-items:center;padding:44px 24px 60px}
.fr-auth-box{
  width:100%;max-width:920px;display:grid;grid-template-columns:minmax(0,.92fr) minmax(0,1.08fr);
  background:#fff;border:1px solid var(--line);border-radius:28px;overflow:hidden;
  box-shadow:0 30px 70px rgba(20,22,28,.13);
}
.fr-auth-side{
  position:relative;padding:38px 34px;color:#fff;overflow:hidden;
  background:linear-gradient(150deg,#5b5bd6,#8b5cf6 55%,#ff5fa2);
}
.fr-auth-side::before{
  content:'';position:absolute;width:230px;height:230px;border-radius:50%;
  background:#22d3ee;filter:blur(56px);opacity:.5;bottom:-90px;right:-70px;
}
.fr-auth-side>*{position:relative;z-index:2}
.fr-auth-side h2{margin:22px 0 0;font-size:26px;font-weight:780;letter-spacing:-.7px;line-height:1.28}
.fr-auth-side p{margin:12px 0 0;font-size:13.5px;opacity:.88;line-height:1.75}
.fr-auth-list{margin:26px 0 0;padding:0;list-style:none;display:flex;flex-direction:column;gap:12px}
.fr-auth-list li{display:flex;align-items:center;gap:10px;font-size:13px;opacity:.94}
.fr-auth-list li i{
  width:22px;height:22px;border-radius:50%;background:rgba(255,255,255,.18);
  display:grid;place-items:center;font-size:10px;flex:0 0 auto;
}
.fr-auth-main{padding:38px 36px}
.fr-tabs{display:flex;gap:6px;background:#f4f5f9;border-radius:13px;padding:4px;margin-bottom:24px}
.fr-tab{
  flex:1;height:36px;border:0;background:transparent;border-radius:10px;font-size:13.5px;
  font-weight:600;color:var(--ink-2);cursor:pointer;transition:.18s;
}
.fr-tab.active{background:#fff;color:var(--ink-1);box-shadow:0 2px 8px rgba(20,22,28,.09)}
.fr-field{margin-bottom:15px}
.fr-field label{display:block;font-size:12.5px;font-weight:600;color:var(--ink-1);margin-bottom:7px}
.fr-input{
  width:100%;height:44px;padding:0 14px;border:1px solid var(--line-2);border-radius:13px;
  font-size:14px;background:#fafbfd;outline:0;transition:.18s;
}
.fr-input:focus{background:#fff;border-color:var(--brand);box-shadow:0 0 0 4px rgba(91,91,214,.12)}
.fr-input::placeholder{color:var(--ink-3)}
.fr-hint{font-size:11.5px;color:var(--ink-3);margin-top:6px;line-height:1.6}
.fr-code-row{display:flex;gap:10px}
.fr-code-row .fr-input{flex:1;min-width:0}
.fr-btn-code{
  height:44px;padding:0 15px;border-radius:13px;border:1px solid var(--line-2);background:#fff;
  color:var(--brand);font-size:13px;font-weight:600;cursor:pointer;white-space:nowrap;transition:.18s;
}
.fr-btn-code:hover:not(:disabled){border-color:var(--brand);box-shadow:0 0 0 4px rgba(91,91,214,.08)}
.fr-btn-code:disabled{opacity:.55;cursor:not-allowed}
.fr-alert{
  border-radius:12px;padding:10px 13px;font-size:12.5px;margin-bottom:15px;display:none;
}
.fr-alert.show{display:block}
.fr-alert.err{background:var(--coral-soft);color:#c92a2a;border:1px solid #ffd7d7}
.fr-alert.ok{background:var(--mint-soft);color:#0a7a5f;border:1px solid #c7f2e5}
.fr-divider{
  display:flex;align-items:center;gap:12px;color:var(--ink-3);font-size:11.5px;margin:20px 0 16px;
}
.fr-divider::before,.fr-divider::after{content:'';flex:1;height:1px;background:var(--line)}
.fr-oauth{display:flex;gap:10px}
.fr-oauth-btn{
  flex:1;height:44px;border-radius:13px;border:1px solid var(--line-2);background:#fff;
  display:flex;align-items:center;justify-content:center;gap:8px;font-size:13.5px;font-weight:600;
  color:var(--ink-1);cursor:pointer;transition:.18s;
}
.fr-oauth-btn:hover{border-color:var(--ink-3);transform:translateY(-1px)}
.fr-oauth-btn.qq i{color:#12b7f5}
.fr-oauth-btn.wx i{color:#07c160}
.fr-auth-foot{margin-top:20px;text-align:center;font-size:12.5px;color:var(--ink-2)}
.fr-auth-foot a{color:var(--brand);text-decoration:none;font-weight:600}

/* 微信扫码登录弹窗（iOS 风格玻璃） */
.fr-scan-modal{position:fixed;inset:0;background:rgba(0,0,0,.45);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);z-index:9999;display:flex;align-items:center;justify-content:center;padding:24px}
.fr-scan-card{width:100%;max-width:340px;background:var(--shell,#fff);border-radius:22px;padding:28px 24px 22px;box-shadow:0 24px 60px rgba(0,0,0,.20);text-align:center}
.fr-scan-title{font-size:18px;font-weight:700;color:var(--ink-1,#1d1d1f);margin-bottom:16px}
.fr-scan-qr{width:200px;height:200px;margin:0 auto 14px;background:#fafafa;border-radius:14px;display:flex;align-items:center;justify-content:center;color:var(--ink-3);font-size:13px;overflow:hidden}
.fr-scan-qr img,.fr-scan-qr canvas{width:200px;height:200px;display:block}
.fr-scan-status{font-size:14px;color:var(--ink-1);margin-bottom:6px;min-height:20px}
.fr-scan-status.ok{color:#34c759}
.fr-scan-status.err{color:#ff3b30}
.fr-scan-hint{font-size:12px;color:var(--ink-3);margin-bottom:18px}
.fr-back{display:inline-flex;align-items:center;gap:6px;margin-top:20px;font-size:12.5px;color:var(--ink-2);text-decoration:none}
.fr-back:hover{color:var(--brand)}

/* ============================ 4. 用户中心 ============================ */
/* 侧栏：宽版（带文字），窄屏退化为底部 tab bar */
.uc-rail{
  width:224px;flex:0 0 224px;background:#fff;border-radius:var(--r-xl);
  border:1px solid var(--line);padding:18px 14px;display:flex;flex-direction:column;gap:4px;
  box-shadow:0 10px 30px rgba(20,22,28,.05);
}
.uc-rail-brand{display:flex;align-items:center;gap:11px;padding:4px 8px 16px;text-decoration:none}
.uc-rail-brand .fr-brand-mark{width:36px;height:36px;border-radius:12px;font-size:16px}
.uc-rail-brand b{display:block;font-size:14.5px;color:var(--ink-1);letter-spacing:-.2px}
.uc-rail-brand span:not(.fr-brand-mark){display:block;font-size:11.5px;color:var(--ink-3)}
.uc-rail-label{
  font-size:10.5px;font-weight:700;letter-spacing:.9px;color:var(--ink-3);
  padding:14px 10px 7px;text-transform:uppercase;
}
.uc-rail-btn{
  display:flex;align-items:center;gap:11px;height:42px;padding:0 12px;border-radius:13px;
  color:var(--ink-2);text-decoration:none;font-size:13.5px;font-weight:550;transition:.16s;position:relative;
}
.uc-rail-btn i{width:18px;text-align:center;font-size:14px}
.uc-rail-btn:hover{background:#f4f5f9;color:var(--ink-1)}
.uc-rail-btn.active{background:var(--brand-soft);color:var(--brand);font-weight:650}
.uc-rail-btn .badge{
  margin-left:auto;font-size:10.5px;background:var(--line);color:var(--ink-2);
  border-radius:99px;padding:2px 8px;font-weight:650;
}
.uc-rail-btn.active .badge{background:rgba(91,91,214,.16);color:var(--brand)}
.uc-rail-foot{margin-top:auto;display:flex;flex-direction:column;gap:4px;padding-top:12px;border-top:1px solid var(--line)}

.uc-user-card{
  background:linear-gradient(135deg,#f7f6ff,#f0f4ff);border:1px solid var(--line);
  border-radius:18px;padding:15px;display:flex;align-items:center;gap:12px;margin-bottom:14px;
}
.uc-user-card .fr-avatar{width:44px;height:44px;font-size:15px}
.uc-user-card b{display:block;font-size:14.5px;letter-spacing:-.2px}
.uc-user-card span{display:block;font-size:11.5px;color:var(--ink-2);margin-top:2px}

/* 页面内容 */
.uc-main{flex:1;min-width:0;overflow-y:auto;padding:0 0 8px}
.uc-page-head{margin:0 0 18px;display:flex;align-items:flex-end;justify-content:space-between;gap:16px;flex-wrap:wrap}
.uc-page-head h1{margin:0;font-size:22px;font-weight:750;letter-spacing:-.5px}
.uc-page-head p{margin:4px 0 0;font-size:13px;color:var(--ink-2)}
.uc-grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
.uc-grid-2{display:grid;grid-template-columns:minmax(0,1.55fr) minmax(0,1fr);gap:14px;align-items:start}
.uc-card{background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);padding:18px}
/* 容量提示条：文件页顶部前置告知配额状态，避免用户上传被拒后才知道容量已满 */
.uc-space-tip{padding:13px 16px;font-size:12.5px;line-height:1.65}
.uc-space-tip.warn{background:#fff8e6;border-color:#ffe6a8;color:#8a5a00}
.uc-space-tip.warn i{color:#d48806}
.uc-space-tip a{color:var(--brand);font-weight:600;text-decoration:none;white-space:nowrap}
.uc-card-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:14px}
.uc-card-head h2{margin:0;font-size:15px;font-weight:700;letter-spacing:-.2px}
.uc-card-head .sub{font-size:11.5px;color:var(--ink-3)}
.uc-stat .t{font-size:12.5px;color:var(--ink-2);display:flex;align-items:center;gap:7px}
.uc-stat .n{font-size:26px;font-weight:750;font-family:var(--font-num);letter-spacing:-.7px;margin-top:8px}
.uc-stat .n small{font-size:12.5px;font-weight:600;color:var(--ink-3);margin-left:4px}

/* 文件行 */
.uc-file{
  /* 操作列需容纳 6 个 30px 按钮 + 5 个 6px 间距 = 210px，否则会被 flex 压缩变形 */
  display:grid;grid-template-columns:26px 38px minmax(0,1fr) 92px 112px 210px;
  align-items:center;gap:12px;padding:11px 12px;border-radius:14px;transition:.16s;
}
.uc-file+.uc-file{margin-top:2px}
.uc-file:hover{background:#f7f8fb}
.uc-file-ic{width:38px;height:38px;border-radius:12px;display:grid;place-items:center;font-size:14px}
.uc-file-nm{min-width:0}
.uc-file-nm b{display:block;font-size:13.5px;font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.uc-file-nm span{font-size:11.5px;color:var(--ink-3);font-family:var(--font-num)}
.uc-file-meta{font-size:12px;color:var(--ink-2);font-family:var(--font-num)}
.uc-file-act{display:flex;gap:6px;justify-content:flex-end}
.uc-mini-btn{
  width:30px;height:30px;flex:0 0 auto;box-sizing:border-box;padding:0;
  border-radius:9px;border:1px solid var(--line-2);background:#fff;
  display:grid;place-items:center;color:var(--ink-2);font-size:12px;text-decoration:none;
  cursor:pointer;transition:.16s;
}
.uc-mini-btn:hover{border-color:var(--brand);color:var(--brand)}
.uc-mini-btn.danger:hover{border-color:var(--coral);color:var(--coral)}
.uc-empty{text-align:center;padding:44px 20px;color:var(--ink-3)}
.uc-empty>i{font-size:34px;opacity:.5;margin-bottom:14px;display:block}
.uc-empty p{margin:0 0 16px;font-size:13.5px}

.uc-progress{height:8px;border-radius:99px;background:#eef0f5;overflow:hidden;margin-top:10px}
.uc-progress i{display:block;height:100%;border-radius:99px;background:linear-gradient(90deg,var(--brand),var(--brand-2))}

.uc-form-row{max-width:420px}
.uc-form-row .fr-field{margin-bottom:16px}

/* 上传区（拖拽） */
.uc-drop{
  border:1.5px dashed var(--line-2);border-radius:20px;padding:34px 20px;text-align:center;
  background:#fafbfd;transition:.2s;cursor:pointer;
}
.uc-drop:hover,.uc-drop.over{border-color:var(--brand);background:var(--brand-soft)}
.uc-drop i{font-size:30px;color:var(--brand);margin-bottom:12px;display:block}
.uc-drop b{display:block;font-size:14.5px;margin-bottom:5px}
.uc-drop span{font-size:12.5px;color:var(--ink-2)}

/* ============================ 5. 响应式 ============================ */
/* 移动端菜单：默认隐藏，JS 加 .open 类时显示 */
.fr-nav-menu{
  display:none;flex-direction:column;gap:2px;
}
@media (max-width:991.98px){
  .fr-nav-links{display:none}
  .fr-nav-toggle{display:inline-flex}
  .fr-nav-menu{
    position:absolute;left:0;right:0;top:64px;background:#fff;border-bottom:1px solid var(--line);
    padding:10px 20px 16px;
    box-shadow:0 14px 30px rgba(20,22,28,.09);
  }
  .fr-nav-menu.open{display:flex}
  .fr-nav-menu a{padding:11px 12px;border-radius:11px;color:var(--ink-1);text-decoration:none;font-size:14px;font-weight:550}
  .fr-nav-menu a:hover{background:#f4f5f9}
  .fr-hero{padding:52px 0 46px}
  .fr-hero-grid{grid-template-columns:1fr;gap:40px}
  .fr-showcase{min-height:0}
  .fr-float-card{display:none}
  .fr-feat-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .fr-stor-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
  .fr-auth-box{grid-template-columns:1fr;max-width:520px}
  .fr-auth-side{padding:28px 26px}
  .fr-auth-side .fr-auth-list{display:none}
  .fr-section{padding:56px 0}
  .uc-grid-3,.uc-grid-2{grid-template-columns:1fr}
  /* 用户中心侧栏 -> 底部 tab bar */
  .uc-app{flex-direction:column!important}
  /* file.php 查看页双列布局（inline style）退化为单列 */
  .uc-main .uc-file-grid-2{display:grid!important;grid-template-columns:1fr!important;gap:14px}
  /* upload.php 上传页双列（inline style）同理，300px 侧栏在窄屏会挤死主列 */
  .uc-main .uc-upload-grid{display:grid!important;grid-template-columns:1fr!important;gap:14px}
  .uc-rail{
    position:fixed;left:10px;right:10px;bottom:10px;width:auto;flex:none;height:64px;
    flex-direction:row;justify-content:space-around;align-items:center;border-radius:20px;
    padding:0 6px;z-index:1050;gap:0;box-shadow:0 10px 30px rgba(20,22,28,.16);
  }
  .uc-rail-brand,.uc-rail-label,.uc-rail-foot,.uc-user-card{display:none!important}
  .uc-rail-btn{width:auto;height:auto;flex-direction:column;gap:3px;padding:6px 10px;font-size:10px;flex:1;justify-content:center}
  .uc-rail-btn i{width:auto;font-size:16px}
  .uc-rail-btn .badge{display:none}
  .uc-main{padding-bottom:84px}
  .uc-file{grid-template-columns:26px 38px minmax(0,1fr)}
  .uc-file-meta{display:none}
  .uc-file-act{display:flex;opacity:1;grid-column:2/-1;justify-content:flex-start;flex-wrap:wrap}
}
@media (max-width:767.98px){
  .fr-feat-grid{grid-template-columns:1fr}
  .fr-stor-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .fr-cta{padding:40px 24px;border-radius:24px}
  .fr-hero-meta{gap:18px}
  .fr-auth-main{padding:28px 22px}
  .uc-grid-3{grid-template-columns:1fr 1fr}
}
@media (max-width:575.98px){
  .fr-wrap,.fr-nav-inner,.fr-footer-in{padding:0 16px}
  /* 窄屏下「上传/登录」按钮组会连同汉堡按钮一起溢出屏幕，而汉堡菜单已含相同入口，直接隐藏 */
  .fr-nav-right{display:none}
  .fr-hero-cta .fr-btn{width:100%}
  .uc-grid-3{grid-template-columns:1fr}
}

/* ============================ 5. 文件详情页（file.php） ============================ */
/* tab 页签：白底 + 品牌色下划线，替代 BS5 nav-tabs 灰底老样式 */
.fr-tabs{display:flex;gap:2px;list-style:none;padding:8px 10px 0;margin:0;border-bottom:1px solid var(--line);background:#fff}
.fr-tabs .nav-link{border:0;border-bottom:2px solid transparent;border-radius:0;background:transparent;padding:10px 14px;font-size:13.5px;font-weight:550;color:var(--ink-2);transition:.16s}
.fr-tabs .nav-link:hover{color:var(--ink-1)}
.fr-tabs .nav-link.active{border-bottom-color:var(--brand);color:var(--brand);font-weight:650}
/* 外链/代码行：胶囊输入框 + 内嵌复制按钮，替代 BS5 input-group + btn-primary */
.fr-link-row{display:flex;gap:12px;align-items:flex-start;margin-bottom:12px}
.fr-link-row:last-child{margin-bottom:0}
.fr-link-label{flex:0 0 auto;width:78px;padding-top:11px;font-size:12.5px;font-weight:600;color:var(--ink-2)}
.fr-link-box{flex:1 1 auto;min-width:0;display:flex;align-items:center;gap:8px;height:42px;padding:0 6px 0 13px;background:#f7f8fa;border:1px solid var(--line);border-radius:12px;transition:.16s}
.fr-link-box:focus-within{border-color:var(--brand);background:#fff;box-shadow:0 0 0 3px rgba(91,91,214,.1)}
.fr-link-box input{flex:1 1 auto;min-width:0;border:0;background:transparent;outline:none;padding:0;font-size:13px;color:var(--ink-1);font-family:var(--font-num)}
.fr-link-copy{flex:0 0 auto;border:0;border-radius:9px;padding:7px 15px;font-size:12.5px;font-weight:650;background:var(--brand-soft);color:var(--brand);cursor:pointer;transition:.16s}
.fr-link-copy:hover{background:rgba(91,91,214,.16)}
/* 管理 tab：危险操作软按钮 */
.fr-btn-danger-soft{display:inline-flex;align-items:center;gap:7px;height:38px;padding:0 20px;border-radius:12px;border:1px solid rgba(214,69,69,.25);background:#fdf1f1;color:#d64545;font-size:13.5px;font-weight:600;cursor:pointer;transition:.16s}
.fr-btn-danger-soft:hover{background:#fbe3e3;border-color:rgba(214,69,69,.4);color:#c03535}
/* 我的文件：整行可点跳详情页（仅带 data-pageurl 的行） */
.uc-file[data-pageurl]{cursor:pointer}