/* FFF digital Lab 官网样式。纯静态、无依赖；导航登录态与用户中心组件见文件末尾 v2 段。 */
:root{
  --bg:#0E1116; --panel:#161A21; --panel-2:#1B2028; --line:#262C36;
  --text:#E6E9EF; --muted:#99A2B0; --accent:#E8A33D; --accent-hi:#F2B75A;
  --ok:#4CAF7D; --danger:#E5484D; --radius:10px; --maxw:1120px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0; background:var(--bg); color:var(--text); line-height:1.7;
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Segoe UI",Inter,Roboto,Helvetica,Arial,sans-serif;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
h1,h2,h3{line-height:1.25;margin:0 0 .5em}
h1{font-size:clamp(30px,4.6vw,52px);letter-spacing:-.02em}
h2{font-size:clamp(22px,3vw,32px);letter-spacing:-.01em}
p{margin:0 0 1em}
.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.muted{color:var(--muted)}
.small{font-size:13px}
.center{text-align:center}
.mono{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}

/* ---------- nav ---------- */
.nav{position:sticky;top:0;z-index:50;background:rgba(14,17,22,.86);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav-inner{display:flex;align-items:center;gap:20px;height:62px}
.brand{font-weight:700;font-size:19px;letter-spacing:.2px}
.brand span{color:var(--accent)}
.links{display:flex;gap:18px;margin-left:8px}
.links a{color:var(--muted);font-size:14.5px}
.links a:hover{color:var(--text)}
.nav-right{margin-left:auto;display:flex;align-items:center;gap:10px}
.lang{background:var(--panel);border:1px solid var(--line);color:var(--text);border-radius:8px;padding:6px 12px;cursor:pointer;font-size:13px}
.lang:hover{border-color:var(--accent)}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:8px;background:var(--panel);border:1px solid var(--line);color:var(--text);
     padding:11px 18px;border-radius:9px;font-size:15px;cursor:pointer;transition:.15s}
.btn:hover{border-color:#3a4250;background:var(--panel-2)}
.btn-accent{background:var(--accent);border-color:var(--accent);color:#1a1206;font-weight:600}
.btn-accent:hover{background:var(--accent-hi);border-color:var(--accent-hi)}
.btn-block{width:100%;justify-content:center}

/* ---------- hero ---------- */
.hero{padding:72px 0 40px}
.hero-grid{display:grid;grid-template-columns:1fr 1.05fr;gap:48px;align-items:center}
.cta-row{display:flex;gap:12px;flex-wrap:wrap;margin:26px 0 14px}
.eyebrow{display:inline-block;color:var(--accent);font-size:13px;letter-spacing:.14em;text-transform:uppercase;margin-bottom:14px}

/* ---------- before/after ---------- */
.frame{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:10px;box-shadow:0 20px 50px rgba(0,0,0,.45)}
.frame-bar{display:flex;gap:6px;padding:4px 6px 10px}
.dot{width:11px;height:11px;border-radius:50%;background:#2f3641}
/* 真实扫描对比：同一张 135 画幅、同一构图。
   before = 未校正；after = FFF digital Lab 校正后。
   源文件为 2305x1594 的 Flextight Input 设备值，导出时统一转 sRGB 再做 JPEG。 */
.ba{position:relative;width:100%;aspect-ratio:2305/1594;border-radius:8px;overflow:hidden;cursor:ew-resize;user-select:none;background:#0f1318}
.ba .layer{position:absolute;inset:0;background-size:cover;background-position:center;background-repeat:no-repeat}
.ba-before{background-image:url("assets/ba-before.jpg")}
.ba-after{background-image:url("assets/ba-after.jpg");clip-path:inset(0 0 0 50%)}
.ba-line{position:absolute;top:0;bottom:0;left:50%;width:2px;background:var(--accent);box-shadow:0 0 0 1px rgba(0,0,0,.35)}
.ba-grip{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:34px;height:34px;border-radius:50%;
  background:var(--accent);color:#1a1206;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:13px;
  box-shadow:0 6px 18px rgba(0,0,0,.5)}
.ba-tag{position:absolute;bottom:10px;font-size:12px;background:rgba(0,0,0,.55);border:1px solid var(--line);
  padding:3px 9px;border-radius:20px;color:#dfe4ea}
.ba-tag-l{left:10px}.ba-tag-r{right:10px}

/* ---------- sections ---------- */
section{padding:56px 0}
.section-head{max-width:680px;margin:0 auto 34px;text-align:center}
.grid{display:grid;gap:18px}
.g3{grid-template-columns:repeat(3,1fr)}
.g2{grid-template-columns:repeat(2,1fr)}
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:22px}
.card h3{font-size:17px;margin-bottom:6px}
.card p{color:var(--muted);font-size:14.5px;margin:0}
.ico{width:34px;height:34px;border-radius:9px;background:rgba(232,163,61,.12);color:var(--accent);
  display:flex;align-items:center;justify-content:center;margin-bottom:12px;font-size:17px}

/* ---------- pricing ---------- */
.price-card{position:relative;display:flex;flex-direction:column}
.price-card.featured{border-color:var(--accent);box-shadow:0 0 0 1px rgba(232,163,61,.35)}
.badge{position:absolute;top:-11px;left:22px;background:var(--accent);color:#1a1206;font-size:12px;font-weight:600;padding:2px 10px;border-radius:20px}
.price{font-size:34px;font-weight:700;margin:6px 0 2px}
.price small{font-size:14px;color:var(--muted);font-weight:400}
.ul{list-style:none;padding:0;margin:16px 0 22px;font-size:14.5px}
.ul li{display:flex;gap:9px;padding:5px 0;color:var(--muted)}
.ul li .tick{color:var(--ok);flex:0 0 auto}
.ul li.no .tick{color:#4a5461}
.price-card .btn{margin-top:auto}
.hr{height:1px;background:var(--line);margin:26px 0}

/* ---------- forms ---------- */
.panel{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:26px}
label{display:block;font-size:13px;color:var(--muted);margin:14px 0 6px}
input,select{width:100%;background:#0f1318;border:1px solid var(--line);color:var(--text);border-radius:8px;padding:11px 13px;font-size:15px}
input:focus,select:focus{outline:none;border-color:var(--accent)}
.row{display:flex;gap:14px;flex-wrap:wrap}
.row>*{flex:1 1 220px}
.qr{display:flex;gap:16px;margin-top:16px;flex-wrap:wrap}
.qr .box{flex:0 0 132px;background:#0f1318;border:1px dashed var(--line);border-radius:10px;padding:14px;text-align:center}
.qr .fake{width:96px;height:96px;margin:0 auto 8px;border-radius:6px;
  background:repeating-conic-gradient(#20262f 0% 25%, #12161c 0% 50%) 50%/12px 12px;border:1px solid var(--line)}
.note{background:rgba(232,163,61,.08);border:1px solid rgba(232,163,61,.25);color:#f0d5a8;border-radius:9px;padding:12px 14px;font-size:13.5px}

/* ---------- faq ---------- */
.faq{max-width:820px;margin:0 auto}
.q{background:var(--panel);border:1px solid var(--line);border-radius:9px;margin-bottom:10px;overflow:hidden}
.q>button{width:100%;text-align:left;background:none;border:0;color:var(--text);font-size:15.5px;padding:15px 18px;cursor:pointer;display:flex;justify-content:space-between;gap:12px}
.q .a{padding:0 18px;max-height:0;overflow:hidden;color:var(--muted);font-size:14.5px;transition:max-height .2s ease,padding .2s ease}
.q.open .a{max-height:400px;padding:0 18px 16px}
.q .pm{color:var(--accent)}

/* ---------- footer ---------- */
footer{border-top:1px solid var(--line);padding:40px 0;margin-top:40px;color:var(--muted);font-size:14px}
.foot-grid{display:flex;gap:28px;flex-wrap:wrap;justify-content:space-between}
.foot-links{display:flex;gap:18px;flex-wrap:wrap}
.foot-links a:hover{color:var(--text)}

/* ---------- docs / legal ---------- */
.doc{max-width:820px;margin:0 auto}
.doc h2{margin-top:40px}
.doc h3{margin-top:26px;font-size:17px}
.doc ol,.doc ul{color:var(--muted)}
.doc code{background:#0f1318;border:1px solid var(--line);border-radius:5px;padding:1px 6px;font-size:13.5px}
.doc .step{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:18px 20px;margin:14px 0}

@media (max-width:900px){
  .hero-grid{grid-template-columns:1fr;gap:30px}
  .g3{grid-template-columns:1fr}
  .g2{grid-template-columns:1fr}
  .links{display:none}
}

/* ==================================================================
   v2 —— 导航登录态 / 用户中心 / 订单与授权界面
   ================================================================== */
.btn-sm{padding:7px 13px;font-size:13.5px;border-radius:8px}
.btn-lg{padding:13px 24px;font-size:16px}
.btn:disabled,.btn[disabled]{opacity:.42;cursor:not-allowed}
.btn-ghost{background:transparent;border-color:transparent;color:var(--muted)}
.btn-ghost:hover{background:var(--panel-2);color:var(--text)}

/* ---------- nav ---------- */
.nav-toggle{display:none;background:var(--panel);border:1px solid var(--line);color:var(--text);border-radius:8px;padding:6px 11px;cursor:pointer;font-size:15px;margin-left:6px}
.nav-auth{display:flex;align-items:center;gap:10px}
.auth-skeleton{display:inline-block;width:104px;height:33px;border-radius:9px;background:var(--panel-2)}
.user-menu{position:relative}
.user-btn{display:flex;align-items:center;gap:8px;background:var(--panel);border:1px solid var(--line);border-radius:999px;padding:3px 11px 3px 3px;cursor:pointer;color:var(--text);font-size:13.5px}
.user-btn:hover{border-color:var(--accent)}
.avatar{width:28px;height:28px;border-radius:50%;background:var(--accent);color:#1a1206;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:13px;flex:0 0 auto}
.user-mail{max-width:152px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.caret{color:var(--muted);font-size:11px}
.user-pop{position:absolute;right:0;top:calc(100% + 8px);min-width:186px;background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:6px;box-shadow:0 16px 40px rgba(0,0,0,.55);z-index:60}
.user-pop a{display:block;padding:9px 12px;border-radius:7px;font-size:14px;color:var(--muted)}
.user-pop a:hover{background:var(--panel-2);color:var(--text)}
.user-pop .sep{height:1px;background:var(--line);margin:5px 0}

/* ---------- 用户中心骨架 ---------- */
.dash{padding:30px 0 64px}
.dash-grid{display:grid;grid-template-columns:248px 1fr;gap:26px;align-items:start}
.side{position:sticky;top:84px;background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:18px}
.side-user{display:flex;gap:11px;align-items:center;padding-bottom:14px;border-bottom:1px solid var(--line)}
.side-user .avatar{width:38px;height:38px;font-size:15px}
.side-user .em{font-size:13.5px;word-break:break-all;line-height:1.45}
.side-user .since{font-size:12px;color:var(--muted)}
.side-nav{display:flex;flex-direction:column;gap:2px;margin:12px 0 4px}
.side-nav a{padding:10px 12px;border-radius:8px;font-size:14.5px;color:var(--muted);display:flex;justify-content:space-between;align-items:center;gap:8px}
.side-nav a:hover{background:var(--panel-2);color:var(--text)}
.side-nav a.active{background:rgba(232,163,61,.13);color:var(--accent);font-weight:600}
.side-nav a .n{font-size:12px;background:var(--panel-2);border-radius:20px;padding:1px 8px;color:var(--muted)}
.side-help{border-top:1px solid var(--line);margin-top:10px;padding-top:12px;font-size:12.5px;color:var(--muted);line-height:1.6}
.pane{display:none}
.pane.active{display:block}
.pane h1{font-size:26px;margin-bottom:6px}
.pane .lead{color:var(--muted);font-size:14.5px;margin-bottom:22px}

/* ---------- 统计卡 ---------- */
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-bottom:20px}
.stat{background:var(--panel);border:1px solid var(--line);border-radius:11px;padding:16px 18px}
.stat .k{font-size:12.5px;color:var(--muted);margin-bottom:6px}
.stat .v{font-size:26px;font-weight:700;letter-spacing:-.01em}
.stat .v small{font-size:13px;font-weight:400;color:var(--muted)}
.stat.hl{border-color:rgba(232,163,61,.45);background:linear-gradient(180deg,rgba(232,163,61,.09),transparent)}

/* ---------- 卡片面板 ---------- */
.card-panel{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:22px;margin-bottom:18px}
.card-panel > h2{font-size:17px;margin-bottom:4px}
.card-panel .sub{color:var(--muted);font-size:13.5px;margin-bottom:16px}
.step-num{display:inline-flex;width:22px;height:22px;border-radius:50%;background:rgba(232,163,61,.16);color:var(--accent);align-items:center;justify-content:center;font-size:12.5px;font-weight:700;margin-right:8px;flex:0 0 auto}

/* ---------- 商品选择 ---------- */
.sku-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin:4px 0 20px}
.sku{position:relative;background:#0f1318;border:1px solid var(--line);border-radius:11px;padding:18px;cursor:pointer;transition:.15s}
.sku:hover{border-color:#3a4250}
.sku.sel{border-color:var(--accent);box-shadow:0 0 0 1px rgba(232,163,61,.4);background:rgba(232,163,61,.05)}
.sku h3{font-size:15.5px;margin:0 0 3px}
.sku .p{font-size:23px;font-weight:700;margin:9px 0 3px}
.sku .p small{font-size:12.5px;font-weight:400;color:var(--muted)}
.sku p.d{color:var(--muted);font-size:13px;margin:0;line-height:1.6}
.sku .tag{position:absolute;top:-9px;left:16px;background:var(--accent);color:#1a1206;font-size:11.5px;font-weight:600;padding:2px 8px;border-radius:20px}
.sku .tag.gray{background:var(--panel-2);color:var(--muted);border:1px solid var(--line)}

/* ---------- 表单 ---------- */
.field{margin-bottom:14px}
.field > label{margin-top:0}
.g2c{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.g3c{display:grid;grid-template-columns:1fr 1fr 1fr;gap:12px}
.help{font-size:12.5px;color:var(--muted);margin-top:6px}
.err-text{color:var(--danger);font-size:13px;margin-top:8px}
.ok-text{color:var(--ok);font-size:13px;margin-top:8px}
.chk{display:flex;align-items:center;gap:8px;font-size:13.5px;color:var(--muted);margin-top:10px}
.chk input{width:auto}
.provider{display:flex;gap:12px;flex-wrap:wrap}
.provider .opt{flex:1 1 210px;border:1px solid var(--line);border-radius:10px;padding:12px 14px;cursor:pointer;background:#0f1318}
.provider .opt.sel{border-color:var(--accent);background:rgba(232,163,61,.07)}
.provider .opt b{display:block;font-size:14px;margin-bottom:3px}
.provider .opt span{font-size:12.5px;color:var(--muted)}
.stepper{display:flex;gap:8px;align-items:center}
.stepper button{width:38px;height:38px;border-radius:8px;background:#0f1318;border:1px solid var(--line);color:var(--text);font-size:17px;cursor:pointer;flex:0 0 auto}
.stepper button:hover{border-color:var(--accent)}
.stepper input{text-align:center;width:74px}
.addr-card{border:1px solid var(--line);border-radius:10px;padding:13px 15px;cursor:pointer;background:#0f1318;margin-bottom:10px;font-size:14px}
.addr-card:hover{border-color:#3a4250}
.addr-card.sel{border-color:var(--accent);background:rgba(232,163,61,.06)}
.addr-card .l1{font-weight:600;margin-bottom:3px}
.addr-card .l2{color:var(--muted);font-size:13px;line-height:1.6}
.addr-card .ops{margin-top:8px;display:flex;gap:12px;font-size:12.5px}
.addr-card .ops a{color:var(--muted)}
.addr-card .ops a:hover{color:var(--accent)}

/* ---------- 授权码 ---------- */
.code-box{display:flex;gap:12px;align-items:center;background:#0f1318;border:1px solid var(--accent);border-radius:10px;padding:14px 16px;margin:12px 0}
.code-box .val{flex:1;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:16px;letter-spacing:.05em;word-break:break-all;color:var(--accent);line-height:1.5}
.mono-lg{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:16px;letter-spacing:.05em}

/* ---------- 表格 ---------- */
.tbl-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:11px;background:var(--panel)}
.tbl{width:100%;border-collapse:collapse;font-size:14px}
.tbl th{text-align:left;color:var(--muted);font-weight:500;font-size:12.5px;padding:11px 14px;border-bottom:1px solid var(--line);white-space:nowrap}
.tbl td{padding:12px 14px;border-bottom:1px solid var(--line);vertical-align:middle}
.tbl tr:last-child td{border-bottom:0}
.pill{display:inline-block;font-size:12px;padding:2px 9px;border-radius:20px;border:1px solid var(--line);color:var(--muted);white-space:nowrap}
.pill.ok{color:var(--ok);border-color:rgba(76,175,125,.4);background:rgba(76,175,125,.1)}
.pill.wait{color:var(--accent);border-color:rgba(232,163,61,.4);background:rgba(232,163,61,.1)}
.pill.ship{color:#7cb6f2;border-color:rgba(124,182,242,.4);background:rgba(124,182,242,.1)}
.empty{text-align:center;color:var(--muted);font-size:14px;padding:36px 12px}
.empty a{color:var(--accent)}

/* ---------- 登录页 ---------- */
.auth-wrap{max-width:960px;margin:0 auto;padding:56px 0 76px;display:grid;grid-template-columns:1fr 400px;gap:44px;align-items:center}
.auth-side h1{font-size:34px}
.auth-list{list-style:none;padding:0;margin:22px 0 0;color:var(--muted);font-size:14.5px}
.auth-list li{padding:6px 0;display:flex;gap:10px}
.auth-list li b{color:var(--text);font-weight:600}
.auth-card{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:26px;box-shadow:0 20px 50px rgba(0,0,0,.35)}
.tabs{display:flex;gap:6px;background:#0f1318;border:1px solid var(--line);border-radius:9px;padding:4px;margin-bottom:20px}
.tabs button{flex:1;background:none;border:0;color:var(--muted);padding:9px;border-radius:7px;cursor:pointer;font-size:14.5px}
.tabs button.active{background:var(--panel-2);color:var(--text);font-weight:600}

/* ---------- 其它 ---------- */
.note-soft{background:rgba(124,182,242,.07);border:1px solid rgba(124,182,242,.25);color:#bcd8f7;border-radius:9px;padding:11px 13px;font-size:13px;line-height:1.65}
#toast{position:fixed;left:50%;bottom:34px;transform:translateX(-50%) translateY(20px);background:var(--panel);border:1px solid var(--accent);
  color:var(--text);padding:12px 20px;border-radius:10px;font-size:14px;box-shadow:0 12px 30px rgba(0,0,0,.5);opacity:0;pointer-events:none;transition:.2s;z-index:200}
#toast.show{opacity:1;transform:translateX(-50%) translateY(0)}
#toast.err{border-color:var(--danger)}
.skel{background:linear-gradient(90deg,var(--panel) 25%,var(--panel-2) 37%,var(--panel) 63%);background-size:400% 100%;animation:skel 1.3s ease infinite;border-radius:7px;height:14px;margin:8px 0}
@keyframes skel{0%{background-position:100% 50%}100%{background-position:0 50%}}

@media (max-width:900px){
  .nav-toggle{display:inline-flex}
  .links.open{display:flex;position:absolute;top:62px;left:0;right:0;flex-direction:column;gap:0;background:var(--panel);border-bottom:1px solid var(--line);padding:8px 24px 16px;margin:0}
  .links.open a{padding:10px 0}
  .dash-grid{grid-template-columns:1fr}
  .side{position:static}
  .side-nav{flex-direction:row;flex-wrap:wrap}
  .stat-grid{grid-template-columns:1fr 1fr}
  .sku-grid{grid-template-columns:1fr}
  .auth-wrap{grid-template-columns:1fr;padding-top:32px;gap:26px}
  .g2c,.g3c{grid-template-columns:1fr}
  .user-mail{display:none}
}