:root{
  --bg:#faf8f3; --surface:#f2efe5; --surface2:#e9e5d8; --surface-hover:#ded9c9;
  --text:#0f0f0d; --muted:#66655c; --muted-strong:#8a867a; --border:#e3ded1;
  --primary:#2e3a2e; --primary-soft:#e6ede6; --primary-dark:#1b2419; --on-primary:#faf8f3; --on-primary-rgb:250,248,243;
  --accent:#c2410c; --amber-bg:#fdf1dc; --amber-tx:#8a5a0b; --danger:#a32d2d; --disabled-bg:#b9bdb7;
  --bg-rgb:250,248,243; --nav-bg:rgba(250,248,243,.92); --nav-bg-alt:rgba(250,248,243,.55);
  --overlay:rgba(15,15,13,.62); --overlay-strong:rgba(15,15,13,.72);
  --toast-bg:#1d1d29; --toast-fg:#fff;
  --shadow-rgb:60,50,30;
  --radius:16px; --radius-sm:10px;
  --fs-h1:clamp(34px,5.2vw,58px); --lh-h1:1.1;
  --fs-h2:clamp(26px,3.4vw,38px); --lh-h2:1.18;
  --fs-h3:17px; --fs-lead:18px;
}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:"PingFang SC","Microsoft YaHei","Segoe UI",system-ui,-apple-system,sans-serif;background:var(--bg);color:var(--text);line-height:1.6;-webkit-font-smoothing:antialiased}
/* 导航骨架：具体样式由后接入的 NAV_CSS（与首页同源）覆盖 */
.nav{position:sticky;top:0;z-index:50;background:var(--nav-bg);backdrop-filter:blur(8px);border-bottom:1px solid var(--border)}
.nav-inner{max-width:1160px;margin:0 auto;padding:0 24px;display:flex;align-items:center;justify-content:space-between;height:68px}
.logo{display:flex;align-items:center;gap:8px;font-weight:800;font-size:17px;color:var(--text);text-decoration:none}
.logo-mark{display:inline-flex;align-items:center;justify-content:center;width:28px;height:28px;border-radius:8px;background:var(--primary);color:var(--on-primary);font-size:15px}
details.lang{position:relative}
details.lang summary{list-style:none;cursor:pointer;border:1px solid var(--border);background:var(--bg);color:var(--muted);font-size:13px;font-weight:600;padding:6px 12px;border-radius:99px}
details.lang summary::-webkit-details-marker{display:none}
details.lang .menu{position:absolute;right:0;top:calc(100% + 6px);background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-sm);box-shadow:0 10px 30px rgba(var(--shadow-rgb),.14);display:grid;grid-template-columns:1fr 1fr;min-width:220px;overflow:hidden;z-index:60}
details.lang .menu a{padding:8px 14px;font-size:13px;color:var(--text);text-decoration:none}
details.lang .menu a:hover{background:var(--surface)}
details.lang .menu a.cur{color:var(--primary);font-weight:700}
.nav-links2{display:flex;gap:18px;font-size:14px;font-weight:600}
.nav-links2 a{color:var(--muted);text-decoration:none;white-space:nowrap}
.nav-links2 a:hover{color:var(--primary)}
@media(max-width:860px){.nav-links2{display:none}}
.crumb{font-size:13px;color:var(--muted);margin:-28px 0 22px}
.crumb a{color:var(--muted);text-decoration:none}
.crumb a:hover{color:var(--primary)}
.crumb-sep{margin:0 8px;opacity:.6}
main{max-width:960px;margin:0 auto;padding:56px 24px 40px}
.hero h1{font-size:var(--fs-h1);line-height:var(--lh-h1);margin-bottom:12px}
.hero .sub{font-size:var(--fs-lead);color:var(--muted);max-width:680px;margin-bottom:24px}
.cta{display:inline-block;background:var(--primary);color:var(--on-primary);text-decoration:none;font-weight:700;font-size:15px;padding:13px 30px;border-radius:99px}
.cta:hover{opacity:.9}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px;margin:36px 0}
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:20px}
.card h2{font-size:var(--fs-h3);margin-bottom:6px}
.card p{font-size:14px;color:var(--muted-strong)}
section.blk{margin:40px 0}
section.blk>h2{font-size:var(--fs-h2);line-height:var(--lh-h2);margin-bottom:14px}
.grid-imgs{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:14px}
.grid-imgs figure{margin:0}
.grid-imgs img{width:100%;display:block;border-radius:var(--radius-sm);border:1px solid var(--border)}
.grid-imgs figcaption{font-size:13px;color:var(--muted);margin-top:6px;text-align:center}
.grid-imgs video{width:100%;display:block;border-radius:var(--radius-sm);border:1px solid var(--border);aspect-ratio:3/4;object-fit:cover;background:#000}
.chipnav{display:flex;gap:10px;flex-wrap:wrap;margin:0 0 30px}
.chipnav a{border:1px solid var(--border);background:var(--surface);color:var(--text);text-decoration:none;font-size:13.5px;font-weight:600;padding:7px 16px;border-radius:99px}
.chipnav a:hover{border-color:var(--primary);color:var(--primary)}
.show-eff{margin:30px 0}
.show-eff h3{font-size:17px;margin-bottom:12px;display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.show-eff h3 a{color:var(--text);text-decoration:none}
.show-eff h3 a:hover{color:var(--primary)}
.show-cred{font-size:12px;color:var(--primary);font-weight:700}
.show-make{margin-left:auto;font-size:13px;font-weight:700;color:var(--primary)}
.spec{width:100%;border-collapse:collapse;margin:8px 0}
.spec th,.spec td{border:1px solid var(--border);padding:10px 14px;font-size:14px;text-align:left}
.spec th{background:var(--surface);width:38%}
.note{background:var(--primary-soft);border-radius:var(--radius-sm);padding:14px 18px;font-size:14px;color:var(--primary-dark);margin:24px 0}
.cmp{list-style:none}
.cmp li{padding:8px 0 8px 26px;position:relative;font-size:14.5px}
.cmp li:before{content:"";position:absolute;left:2px;top:14px;width:12px;height:12px;border-radius:50%;background:var(--primary)}
.faq details{border:1px solid var(--border);border-radius:var(--radius-sm);padding:14px 18px;margin-bottom:10px;background:var(--surface)}
.faq summary{cursor:pointer;font-weight:600;font-size:15px}
.faq p{margin-top:8px;font-size:14px;color:var(--muted-strong)}
.cta-blk{text-align:center;margin:48px 0}
[dir="rtl"] .nav-inner{flex-direction:row-reverse}
[dir="rtl"] .show-make{margin-left:0;margin-right:auto}
footer{border-top:1px solid var(--border);padding:44px 0;background:var(--surface);color:var(--muted);font-size:13px}
.foot-inner{max-width:1080px;margin:0 auto;padding:0 24px}
.foot-top{display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:36px;padding:6px 0 34px}
.foot-col h4{font-size:11.5px;font-weight:800;letter-spacing:.12em;text-transform:uppercase;color:var(--text);margin-bottom:15px}
.foot-col a{display:block;font-size:13px;color:var(--muted);padding:6px 0;transition:.15s;text-decoration:none}
.foot-col a:hover{color:var(--primary)}
.foot-brand{font-size:15px;font-weight:800;color:var(--text);letter-spacing:-.02em;margin-bottom:10px}
.foot-brand-sub{font-size:13px;color:var(--muted);line-height:1.65;max-width:34ch}
.foot-bottom{border-top:1px solid var(--border);padding-top:22px;display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;font-size:12.5px;color:var(--muted)}
.foot-legal a{color:inherit;text-decoration:underline;text-underline-offset:3px;text-decoration-color:var(--border)}
.foot-legal a:hover{color:var(--primary)}
@media (max-width:880px){.foot-top{grid-template-columns:1fr 1fr;gap:26px}.foot-col:first-child{grid-column:1/-1}}
@media (max-width:620px){.foot-top{grid-template-columns:1fr}}
.ef-gal{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:12px}
.ef-pair{display:grid;grid-template-columns:1fr 1fr;gap:6px;margin:0;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);padding:8px}
.ef-pair img,.ef-pair video{width:100%;display:block;border-radius:8px;aspect-ratio:3/4;object-fit:cover}
.ef-steps{list-style:none;counter-reset:s;display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:12px;padding:0}
.ef-steps li{counter-increment:s;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);padding:14px 16px;font-size:14px}
.ef-steps li:before{content:"0" counter(s);display:inline-block;background:var(--primary);color:var(--on-primary);font-weight:700;border-radius:8px;padding:1px 9px;margin-right:8px;font-size:12px}
.ef-steps li b{display:block;margin-top:6px;font-size:15px}
.ef-steps li span{color:var(--muted)}
.ef-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:14px}
.ef-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:14px;text-decoration:none;color:var(--text);display:block}
.ef-card:hover{border-color:var(--primary)}
.ef-card b{display:block;margin-top:10px;font-size:15px}
.ef-card p{font-size:13px;color:var(--muted);margin:4px 0 8px}
.ef-card-img img,.ef-card-img video{width:100%;display:block;border-radius:10px;aspect-ratio:1/1;object-fit:cover}
.ef-cred{font-size:12px;color:var(--primary);font-weight:700}
.ecreate{display:grid;grid-template-columns:1.4fr 1fr;gap:16px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:16px}
@media(max-width:720px){.ecreate{grid-template-columns:1fr}}
.ec-drop{border:2px dashed var(--border);border-radius:var(--radius-sm);min-height:230px;display:flex;flex-direction:column;align-items:center;justify-content:center;cursor:pointer;text-align:center;gap:4px;background:var(--bg)}
.ec-drop.drag,.ec-drop:hover{border-color:var(--primary)}
.ec-drop-ico{font-size:30px}
.ec-drop-t{font-weight:700;font-size:15px}
.ec-drop-s{font-size:12px;color:var(--muted)}
.ec-preview{position:relative;display:none}
.ec-preview img{width:100%;border-radius:var(--radius-sm);display:block;max-height:340px;object-fit:cover}
.ec-reupload{position:absolute;right:8px;bottom:8px;background:rgba(15,15,13,.78);color:var(--on-primary);font-size:12px;border-radius:99px;padding:5px 12px;cursor:pointer}
.ec-right{display:flex;flex-direction:column;gap:10px}
.ec-price{font-weight:800;color:var(--primary);font-size:16px}
.ec-btn{background:var(--primary);color:var(--on-primary);border:0;border-radius:99px;padding:12px 20px;font-size:15px;font-weight:700;cursor:pointer;text-align:center}
.ec-btn:hover{opacity:.9}
.ec-btn:disabled{opacity:.6;cursor:wait}
.ec-btn.ec-ghost{background:var(--bg);color:var(--text);border:1px solid var(--border)}
.ec-adj summary{cursor:pointer;font-size:13px;color:var(--muted)}
.ec-adj textarea{width:100%;min-height:64px;border:1px solid var(--border);border-radius:10px;padding:8px;font-size:13px;margin-top:8px;font-family:inherit;resize:vertical}
.ec-msg{font-size:13px;color:var(--muted);min-height:18px}
.ec-msg.err{color:var(--danger)}
.ec-login{display:grid;gap:6px}
.ec-login-btn{display:block;text-align:center;background:var(--primary-soft);color:var(--primary);font-weight:700;border-radius:99px;padding:10px;text-decoration:none;font-size:14px}
.ec-login-tip{font-size:12px;color:var(--muted);text-align:center}
.ec-result{grid-column:1/-1;display:none}
.ec-result img,.ec-result video{width:100%;max-width:520px;display:block;border-radius:var(--radius-sm);margin:0 auto;border:1px solid var(--border)}
.ec-result-bar{display:flex;gap:10px;justify-content:center;margin-top:10px;flex-wrap:wrap}
[dir="rtl"] .ecreate{direction:rtl}
[dir="rtl"] .ef-pair{direction:rtl}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}

/* nav */
.nav{position:sticky;top:0;z-index:50;background:var(--nav-bg);backdrop-filter:blur(8px);border-bottom:1px solid var(--border);transition:background .22s,backdrop-filter .22s,border-color .22s}
.nav.at-top{background:var(--nav-bg);backdrop-filter:blur(16px) saturate(1.1);border-bottom-color:transparent}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:68px}
.logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:17px;letter-spacing:-.01em}
.logo-mark{width:30px;height:30px;border-radius:9px;background:var(--primary);display:flex;align-items:center;justify-content:center;color:var(--on-primary);font-size:15px;font-weight:800}
.nav-links{display:flex;gap:26px;font-size:14.5px;color:var(--muted)}
.nav-links a:hover{color:var(--primary)}
.nav-dd{position:relative}
.nav-dd>summary{list-style:none;cursor:pointer;color:var(--muted)}
.nav-dd>summary::-webkit-details-marker{display:none}
.nav-dd>summary:hover,.nav-dd[open]>summary{color:var(--primary)}
.nav-dd .dd-menu{position:absolute;left:50%;transform:translateX(-50%);top:calc(100% + 14px);background:var(--bg);border:1px solid var(--border);border-radius:16px;box-shadow:0 18px 44px rgba(var(--shadow-rgb),.12);padding:16px 20px;display:grid;grid-template-columns:repeat(2,minmax(180px,1fr));gap:6px 24px;min-width:440px;z-index:60}
/* 悬停桥：填住 summary 与菜单之间 14px 空隙，光标移过去不会中途收起 */
.nav-dd .dd-menu::before{content:"";position:absolute;left:0;right:0;top:-16px;height:16px}
.nav-dd .dd-col{display:flex;flex-direction:column;gap:4px}
.nav-dd .dd-h{font-size:11.5px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin-bottom:4px}
.nav-dd .dd-menu a{color:var(--text);font-size:13.5px;padding:6px 12px;margin:0 -12px;border-radius:8px;white-space:nowrap;transition:background .15s,color .15s}
.nav-dd .dd-menu a:hover{color:var(--primary);background:var(--primary-soft)}
.nav-dd .dd-menu a .tag{font-size:10.5px;font-weight:700;border-radius:5px;padding:1px 5px;margin-left:6px;background:var(--amber-bg);color:var(--amber-tx)}
@media (max-width:1040px){.nav-dd .dd-menu{grid-template-columns:1fr;min-width:240px;left:0;transform:none}}
.nav-right{display:flex;align-items:center;gap:12px}
.credits-badge{display:flex;align-items:center;gap:6px;background:var(--amber-bg);color:var(--amber-tx);font-size:13.5px;font-weight:600;padding:5px 13px;border-radius:99px}
.lang-btn{border:1px solid var(--border);background:var(--bg);color:var(--muted);font-family:inherit;font-size:13px;font-weight:600;padding:6px 13px;border-radius:99px;cursor:pointer}
.lang-btn:hover{border-color:var(--primary);color:var(--primary)}
.lang-wrap{position:relative;display:inline-flex}
/* theme switcher */
.theme-btn{border:1px solid var(--border);background:var(--bg);color:var(--muted);font-family:inherit;font-size:13px;font-weight:600;padding:6px 12px;border-radius:99px;cursor:pointer;display:inline-flex;align-items:center;gap:6px;transition:.16s}
.theme-btn:hover{border-color:var(--primary);color:var(--primary)}
.theme-btn .sw-dot{width:11px;height:11px;border-radius:50%;background:linear-gradient(135deg,var(--primary) 0 55%,var(--bg) 55% 100%);border:1px solid var(--border);flex:0 0 auto}
.theme-wrap{position:relative;display:inline-flex}
.theme-dd{position:absolute;top:calc(100% + 8px);right:0;background:var(--bg);border:1px solid var(--border);border-radius:var(--radius);box-shadow:0 12px 34px rgba(var(--shadow-rgb),.14);min-width:246px;display:none;overflow:hidden;z-index:70}
.theme-dd.open{display:block}
.theme-dd .dd-head{padding:13px 15px 7px;font-size:11.5px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}
.theme-opt{display:flex;align-items:center;gap:11px;width:100%;text-align:left;border:0;background:0;cursor:pointer;font-family:inherit;font-size:13.5px;color:var(--text);padding:11px 15px;transition:.15s}
.theme-opt:hover{background:var(--surface-hover)}
.theme-opt.on{background:var(--primary-soft);color:var(--primary);font-weight:600}
.theme-swatch{width:38px;height:24px;border-radius:7px;flex:0 0 auto;display:flex;overflow:hidden;border:1px solid var(--border)}
.theme-swatch i{display:block;flex:1}
.theme-opt .tn{white-space:nowrap}
@media (max-width:900px){.theme-btn{padding:6px 10px}.theme-btn .tx{display:none}}
.lang-menu{max-height:62vh;overflow-y:auto}
.lang-menu .cur{color:var(--primary);font-weight:700}
/* 语言菜单项纵向排列：子页用的是 <a>（无 JS 也能跳转），不走 .dropdown button 规则，需单独成行 */
.lang-menu a{display:block;width:100%;text-align:left;background:none;font-family:inherit;font-size:13.5px;padding:11px 16px;color:var(--text);white-space:nowrap}
.lang-menu a:hover{background:var(--surface)}
[dir="rtl"] .nav-inner{flex-direction:row-reverse}
[dir="rtl"] .dropdown,[dir="rtl"] .theme-dd{right:auto;left:0}
/* 按钮与用户菜单：首页同款，子页复用 */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:none;cursor:pointer;font-family:inherit;font-size:14.5px;font-weight:600;border-radius:99px;padding:11px 24px;transition:.16s}
.btn-primary{background:var(--primary);color:var(--on-primary)}
.btn-primary:hover{background:var(--primary-dark)}
.btn-primary:disabled{background:var(--disabled-bg);cursor:not-allowed}
.btn-ghost{background:var(--surface2);color:var(--text)}
.btn-ghost:hover{background:var(--surface-hover)}
.btn-sm{padding:8px 16px;font-size:13.5px}
/* user menu */
.user-menu{position:relative}
.user-avatar{display:flex;align-items:center;gap:8px;cursor:pointer;padding:5px 12px;border-radius:99px;border:1px solid var(--border);font-size:13.5px;font-weight:600}
.user-avatar:hover{border-color:var(--primary)}
.avatar-dot{width:26px;height:26px;border-radius:50%;background:var(--primary);color:var(--on-primary);display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:700}
.dropdown{position:absolute;top:calc(100% + 8px);right:0;background:var(--bg);border:1px solid var(--border);border-radius:var(--radius);box-shadow:0 12px 34px rgba(var(--shadow-rgb),.12);min-width:210px;display:none;overflow:hidden}
.dropdown.open{display:block}
.dropdown .dd-head{padding:12px 16px;border-bottom:1px solid var(--border)}
.dropdown .dd-head b{font-size:14px}
.dropdown .dd-head small{display:block;color:var(--muted);font-size:12px}
.dropdown button{display:block;width:100%;text-align:left;background:none;border:none;font-family:inherit;font-size:13.5px;padding:11px 16px;cursor:pointer;color:var(--text)}
.dropdown button:hover{background:var(--surface)}
.dropdown button.danger{color:var(--danger)}

[data-theme="a"]{
  --bg:#0a0a0c; --surface:#121217; --surface2:#1a1a21; --surface-hover:#26262f;
  --text:#f5f5f7; --muted:#9a9aa6; --muted-strong:#6e6e7a; --border:#26262f;
  --primary:#7c6bff; --primary-soft:#211e3c; --primary-dark:#5b4de0; --on-primary:#ffffff; --on-primary-rgb:255,255,255;
  --accent:#ff6b35; --amber-bg:#2a1f10; --amber-tx:#ffb84d; --danger:#ff5c5c;
  --bg-rgb:10,10,12; --nav-bg:rgba(10,10,12,.92); --nav-bg-alt:rgba(10,10,12,.55);
  --overlay:rgba(0,0,0,.62); --overlay-strong:rgba(0,0,0,.75);
  --toast-bg:#23232b; --toast-fg:#fff; --disabled-bg:#33333d; --shadow-rgb:0,0,0;
}
[data-theme="b"]{
  --bg:#ffffff; --surface:#ffffff; --surface2:#f4f4f4; --surface-hover:#e8e8e8;
  --text:#000000; --muted:#5c5c5c; --muted-strong:#8a8a8a; --border:#e6e6e6;
  --primary:#000000; --primary-soft:#f0f0f0; --primary-dark:#333333; --on-primary:#ffffff; --on-primary-rgb:255,255,255;
  --accent:#ff5500; --amber-bg:#fff4ec; --amber-tx:#b3450a; --danger:#c0392b;
  --bg-rgb:255,255,255; --nav-bg:rgba(255,255,255,.92); --nav-bg-alt:rgba(255,255,255,.55);
  --overlay:rgba(0,0,0,.62); --overlay-strong:rgba(0,0,0,.75);
  --toast-bg:#000000; --toast-fg:#ffffff; --disabled-bg:#d4d4d4; --shadow-rgb:0,0,0;
  --radius:12px; --radius-sm:8px;
}