/* ============ 9H v6 设计系统 ============ */
*,::after,::before{box-sizing:border-box;margin:0;padding:0}
:root{
  --primary:#6366f1;--primary-2:#8b5cf6;--primary-3:#a78bfa;
  --grad:linear-gradient(135deg,#6366f1 0%,#8b5cf6 60%,#a78bfa 100%);
  --grad-soft:linear-gradient(135deg,rgba(99,102,241,.12),rgba(139,92,246,.08));
  --radius:20px;--radius-sm:12px;--radius-xs:8px;
  --ff:-apple-system,BlinkMacSystemFont,"SF Pro Text","Segoe UI",Roboto,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --ease:cubic-bezier(.22,.68,.32,1);
}
[data-theme="light"]{
  --bg:#f4f5fb;--bg-2:#eceef7;
  --card:rgba(255,255,255,.82);--card-solid:#ffffff;
  --text:#0f172a;--text-2:#475569;--text-3:#94a3b8;
  --border:rgba(15,23,42,.08);--border-2:rgba(15,23,42,.12);
  --input-bg:rgba(255,255,255,.9);
  --shadow-sm:0 1px 2px rgba(15,23,42,.05);
  --shadow:0 8px 30px rgba(99,102,241,.10),0 2px 8px rgba(15,23,42,.05);
  --shadow-lg:0 20px 60px rgba(99,102,241,.16),0 4px 16px rgba(15,23,42,.06);
  --orb-1:rgba(99,102,241,.14);--orb-2:rgba(139,92,246,.10);--orb-3:rgba(56,189,248,.08);
  --nav-bg:rgba(255,255,255,.78);
  --success:#10b981;--success-bg:rgba(16,185,129,.1);
}
[data-theme="dark"]{
  --bg:#080810;--bg-2:#0e0e1a;
  --card:rgba(22,22,36,.72);--card-solid:#14141f;
  --text:#f1f5f9;--text-2:#a3aec2;--text-3:#5b6478;
  --border:rgba(255,255,255,.08);--border-2:rgba(255,255,255,.14);
  --input-bg:rgba(255,255,255,.05);
  --shadow-sm:0 1px 2px rgba(0,0,0,.3);
  --shadow:0 8px 30px rgba(0,0,0,.35),0 2px 8px rgba(99,102,241,.08);
  --shadow-lg:0 20px 60px rgba(0,0,0,.5),0 4px 16px rgba(99,102,241,.12);
  --orb-1:rgba(99,102,241,.16);--orb-2:rgba(139,92,246,.12);--orb-3:rgba(56,189,248,.07);
  --nav-bg:rgba(10,10,18,.72);
  --success:#34d399;--success-bg:rgba(52,211,153,.12);
}
html{scroll-behavior:smooth}
body{font-family:var(--ff);background:var(--bg);color:var(--text);min-height:100vh;line-height:1.6;-webkit-font-smoothing:antialiased;transition:background .3s,color .3s;overflow-x:hidden}
/* 背景光斑 */
.bg-orbs{position:fixed;inset:0;z-index:-1;overflow:hidden;pointer-events:none}
.bg-orbs i{position:absolute;border-radius:50%;filter:blur(90px);opacity:.9;animation:drift 18s ease-in-out infinite alternate}
.bg-orbs i:nth-child(1){width:480px;height:480px;left:-120px;top:-120px;background:var(--orb-1)}
.bg-orbs i:nth-child(2){width:420px;height:420px;right:-100px;top:20%;background:var(--orb-2);animation-delay:-6s}
.bg-orbs i:nth-child(3){width:380px;height:380px;left:30%;bottom:-140px;background:var(--orb-3);animation-delay:-12s}
@keyframes drift{from{transform:translate(0,0) scale(1)}to{transform:translate(40px,30px) scale(1.08)}}
h1.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap}
/* ============ 导航 ============ */
.nav{position:sticky;top:12px;z-index:100;margin:12px auto 0;max-width:1060px;width:calc(100% - 32px)}
.nav-inner{display:flex;align-items:center;gap:20px;height:58px;padding:0 8px 0 20px;background:var(--nav-bg);backdrop-filter:blur(20px) saturate(1.4);-webkit-backdrop-filter:blur(20px) saturate(1.4);border:1px solid var(--border);border-radius:18px;box-shadow:var(--shadow-sm)}
.nav-logo{display:flex;align-items:center;gap:10px;text-decoration:none;flex-shrink:0}
.nav-logo .logo-mark{width:34px;height:34px;border-radius:11px;background:var(--grad);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:800;font-size:15px;letter-spacing:-.5px;box-shadow:0 4px 14px rgba(99,102,241,.35);transition:transform .25s var(--ease)}
.nav-logo:hover .logo-mark{transform:rotate(-8deg) scale(1.06)}
.nav-logo .logo-text{font-weight:800;font-size:16px;color:var(--text);letter-spacing:-.3px;white-space:nowrap}
.nav-links{display:flex;gap:2px;flex:1;overflow-x:auto;scrollbar-width:none}
.nav-links::-webkit-scrollbar{display:none}
.nav-links a{font-size:13.5px;font-weight:500;color:var(--text-2);text-decoration:none;padding:8px 13px;border-radius:10px;white-space:nowrap;transition:all .2s var(--ease)}
.nav-links a:hover{color:var(--text);background:var(--grad-soft)}
.nav-links a.active{color:var(--primary);background:rgba(99,102,241,.1);font-weight:600}
.nav-right{display:flex;align-items:center;gap:8px;flex-shrink:0}
.theme-btn{width:36px;height:36px;border-radius:11px;border:1px solid var(--border);background:var(--card);color:var(--text-2);cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:16px;transition:all .25s var(--ease)}
.theme-btn:hover{color:var(--primary);border-color:var(--primary);transform:rotate(15deg)}
.nav-cta{font-size:13px;font-weight:600;color:#fff;text-decoration:none;padding:9px 18px;border-radius:11px;background:var(--grad);box-shadow:0 4px 14px rgba(99,102,241,.3);transition:all .25s var(--ease);white-space:nowrap}
.nav-cta:hover{transform:translateY(-1px);box-shadow:0 8px 22px rgba(99,102,241,.4)}
/* ============ 主体 ============ */
.main{max-width:1060px;margin:0 auto;padding:0 16px 40px}
/* Hero */
.hero{text-align:center;padding:56px 20px 30px;position:relative}
.hero-badge{display:inline-flex;align-items:center;gap:7px;font-size:12.5px;font-weight:600;color:var(--primary);background:rgba(99,102,241,.09);border:1px solid rgba(99,102,241,.18);padding:7px 16px;border-radius:100px;margin-bottom:20px;animation:fadeUp .6s var(--ease) both}
.hero-badge .dot{width:7px;height:7px;border-radius:50%;background:var(--success);box-shadow:0 0 0 3px var(--success-bg);animation:blink 2s infinite}
@keyframes blink{50%{opacity:.5}}
.hero-title{font-size:clamp(34px,6vw,54px);font-weight:800;letter-spacing:-1.5px;line-height:1.15;margin-bottom:14px;animation:fadeUp .6s .08s var(--ease) both}
.hero-title .grad{background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.hero-sub{font-size:15.5px;color:var(--text-2);max-width:520px;margin:0 auto 26px;line-height:1.7;animation:fadeUp .6s .16s var(--ease) both}
.hero-stats{display:flex;gap:26px;justify-content:center;flex-wrap:wrap;animation:fadeUp .6s .24s var(--ease) both}
.hstat{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-2);font-weight:500}
.hstat b{font-size:16px;color:var(--text);font-weight:800}
.hstat .ic{font-size:17px}
@keyframes fadeUp{from{opacity:0;transform:translateY(18px)}to{opacity:1;transform:none}}
/* 工具卡片 */
.tool{max-width:680px;margin:6px auto 0;background:var(--card);backdrop-filter:blur(20px) saturate(1.3);-webkit-backdrop-filter:blur(20px) saturate(1.3);border:1px solid var(--border);border-radius:26px;box-shadow:var(--shadow-lg);padding:26px;position:relative;overflow:hidden;animation:fadeUp .6s .3s var(--ease) both}
.tool::before{content:"";position:absolute;top:0;left:10%;right:10%;height:1px;background:linear-gradient(90deg,transparent,rgba(139,92,246,.5),transparent)}
.quota-bar{display:none;align-items:center;gap:8px;font-size:12.5px;color:var(--text-2);background:var(--grad-soft);border:1px solid rgba(99,102,241,.14);padding:9px 14px;border-radius:12px;margin-bottom:18px}
.quota-bar.show{display:flex}
.quota-bar b{color:var(--primary);font-weight:700}
.quota-bar a{color:var(--primary);font-weight:600;text-decoration:none;margin-left:auto;font-size:12.5px}
/* 分段选项卡 */
.seg{display:flex;background:var(--bg-2);border:1px solid var(--border);border-radius:15px;padding:4px;margin-bottom:22px;position:relative}
.tab{flex:1;border:0;background:transparent;color:var(--text-3);font-size:14px;font-weight:600;font-family:var(--ff);padding:11px 0;border-radius:11px;cursor:pointer;display:flex;align-items:center;justify-content:center;gap:8px;transition:all .25s var(--ease);position:relative;z-index:1}
.tab .tic{font-size:16px}
.tab:not(.on):hover{color:var(--text-2)}
.tab.on{background:var(--card-solid);color:var(--text);box-shadow:var(--shadow-sm);border:1px solid var(--border)}
.tab.on .tic{transform:scale(1.12)}
.panel{display:none}
.panel.on{display:block;animation:panelIn .35s var(--ease)}
@keyframes panelIn{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}
/* 表单 */
.fg{margin-bottom:16px}
.fg label{display:flex;justify-content:space-between;align-items:center;font-size:13px;font-weight:600;color:var(--text-2);margin-bottom:8px}
.fg label .opt{font-size:11.5px;font-weight:500;color:var(--text-3);background:var(--bg-2);border:1px solid var(--border);padding:2px 9px;border-radius:20px}
.fg label .count{font-size:11.5px;color:var(--text-3);font-weight:500}
.input-wrap{position:relative;display:flex;align-items:center}
.input-wrap .i-ic{position:absolute;left:15px;font-size:17px;pointer-events:none;opacity:.75;z-index:1}
.fg input,.fg textarea,.fg select{width:100%;border:1.5px solid var(--border);border-radius:14px;background:var(--input-bg);color:var(--text);font-size:15px;font-family:var(--ff);padding:14px 16px;transition:all .22s var(--ease);outline:none}
.input-wrap input{padding-left:44px}
.fg input:focus,.fg textarea:focus,.fg select:focus{border-color:var(--primary);box-shadow:0 0 0 4px rgba(99,102,241,.13);background:var(--card-solid)}
.fg input::placeholder,.fg textarea::placeholder{color:var(--text-3)}
.fg textarea{resize:vertical;min-height:74px;line-height:1.6}
.fg select{cursor:pointer;appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2394a3b8' d='M6 8.5L1 3.5h10z'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 16px center}
.prefix-wrap{display:flex;align-items:stretch;border:1.5px solid var(--border);border-radius:14px;background:var(--input-bg);transition:all .22s var(--ease);overflow:hidden}
.prefix-wrap:focus-within{border-color:var(--primary);box-shadow:0 0 0 4px rgba(99,102,241,.13)}
.prefix-wrap .pre{display:flex;align-items:center;padding:0 4px 0 16px;font-size:14.5px;font-weight:600;color:var(--primary);white-space:nowrap;user-select:none}
.prefix-wrap input{border:0!important;box-shadow:none!important;background:transparent!important;padding-left:2px!important;border-radius:0!important}
.hint{margin-top:8px;font-size:12px;color:var(--text-3);line-height:1.6}
/* 按钮 */
.btn-primary{width:100%;border:0;border-radius:14px;padding:15px;font-size:15.5px;font-weight:700;font-family:var(--ff);color:#fff;background:var(--grad);cursor:pointer;display:flex;align-items:center;justify-content:center;gap:9px;box-shadow:0 8px 24px rgba(99,102,241,.35);transition:all .25s var(--ease);position:relative;overflow:hidden;margin-top:4px}
.btn-primary::after{content:"";position:absolute;top:0;left:-80%;width:50%;height:100%;background:linear-gradient(100deg,transparent,rgba(255,255,255,.35),transparent);transform:skewX(-20deg);transition:left .6s}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 32px rgba(99,102,241,.45)}
.btn-primary:hover::after{left:130%}
.btn-primary:active{transform:translateY(0) scale(.99)}
.btn-primary:disabled{opacity:.7;cursor:wait;transform:none}
.btn-primary .spinner{width:17px;height:17px;border:2.5px solid rgba(255,255,255,.35);border-top-color:#fff;border-radius:50%;animation:spin .7s linear infinite;display:none}
.btn-primary.loading .spinner{display:block}
@keyframes spin{to{transform:rotate(360deg)}}
/* 结果卡 */
.result-card{display:none;margin-top:18px;border-radius:18px;padding:20px;background:var(--grad-soft);border:1.5px dashed rgba(99,102,241,.35);animation:popIn .4s var(--ease)}
.result-card.show{display:block}
@keyframes popIn{from{opacity:0;transform:scale(.97) translateY(8px)}to{opacity:1;transform:none}}
.result-label{font-size:12px;font-weight:600;color:var(--text-3);margin-bottom:8px;display:flex;align-items:center;gap:6px}
.result-url{font-size:16px;font-weight:700;color:var(--primary);word-break:break-all;text-align:center;padding:14px;background:var(--card-solid);border-radius:12px;border:1px solid var(--border);margin-bottom:14px;letter-spacing:-.2px;cursor:pointer;transition:all .2s}
.result-url:hover{border-color:var(--primary)}
.result-actions{display:flex;gap:9px;justify-content:center;flex-wrap:wrap}
.btn-ghost{display:inline-flex;align-items:center;gap:7px;padding:10px 18px;border-radius:11px;border:1.5px solid var(--border);background:var(--card-solid);color:var(--text-2);font-size:13.5px;font-weight:600;font-family:var(--ff);cursor:pointer;transition:all .22s var(--ease)}
.btn-ghost:hover{border-color:var(--primary);color:var(--primary);transform:translateY(-1px);box-shadow:var(--shadow-sm)}
.btn-ghost:active{transform:scale(.97)}
.btn-ghost.ok{border-color:var(--success);color:var(--success);background:var(--success-bg)}
/* 二维码类型选择 */
.qr-types{display:grid;grid-template-columns:repeat(6,1fr);gap:8px;margin-bottom:20px}
.qr-type{border:1.5px solid var(--border);border-radius:13px;background:var(--card-solid);padding:11px 4px;cursor:pointer;display:flex;flex-direction:column;align-items:center;gap:5px;font-family:var(--ff);transition:all .22s var(--ease);color:var(--text-3)}
.qr-type .qic{font-size:19px;transition:transform .22s var(--ease)}
.qr-type .qtx{font-size:11px;font-weight:600}
.qr-type:hover{border-color:var(--border-2);color:var(--text-2);transform:translateY(-1px)}
.qr-type.on{border-color:var(--primary);color:var(--primary);background:rgba(99,102,241,.07);box-shadow:0 4px 14px rgba(99,102,241,.14)}
.qr-type.on .qic{transform:scale(1.15)}
.qr-field{display:none}
.qr-field.on{display:block;animation:panelIn .3s var(--ease)}
/* 二维码预览 */
.qr-preview{display:none;margin-top:18px;text-align:center;padding:24px 20px;background:var(--card-solid);border:1px solid var(--border);border-radius:18px;box-shadow:var(--shadow)}
.qr-preview.show{display:block;animation:popIn .4s var(--ease)}
.qr-box{display:inline-block;background:#fff;border-radius:14px;padding:14px;box-shadow:var(--shadow-sm);margin-bottom:16px}
.qr-box canvas,.qr-box img,.qr-box svg{display:block!important;width:200px!important;height:200px!important;border-radius:6px}
.qr-actions{display:flex;gap:9px;justify-content:center;flex-wrap:wrap}
/* 特性 */
.features{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;max-width:900px;margin:44px auto 0}
.feature{background:var(--card);backdrop-filter:blur(14px);border:1px solid var(--border);border-radius:18px;padding:22px 18px;text-align:center;transition:all .3s var(--ease);box-shadow:var(--shadow-sm)}
.feature:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:rgba(99,102,241,.25)}
.feature .fic{font-size:26px;margin-bottom:10px;display:block}
.feature b{display:block;font-size:14px;margin-bottom:5px;letter-spacing:-.2px}
.feature span{font-size:12px;color:var(--text-2);line-height:1.6}
/* FAQ */
.faq-sec{max-width:680px;margin:44px auto 0}
.sec-title{text-align:center;font-size:21px;font-weight:800;letter-spacing:-.5px;margin-bottom:6px}
.sec-sub{text-align:center;font-size:13px;color:var(--text-2);margin-bottom:20px}
.faq-list{display:flex;flex-direction:column;gap:10px}
.faq-item{background:var(--card);border:1px solid var(--border);border-radius:15px;overflow:hidden;transition:all .25s var(--ease)}
.faq-item:hover{border-color:rgba(99,102,241,.25)}
.faq-q{width:100%;border:0;background:none;color:var(--text);font-family:var(--ff);font-size:14px;font-weight:600;text-align:left;padding:16px 20px;cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:12px}
.faq-q .arr{font-size:12px;color:var(--text-3);transition:transform .25s var(--ease);flex-shrink:0}
.faq-item.open .faq-q .arr{transform:rotate(180deg);color:var(--primary)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s var(--ease)}
.faq-a p{padding:0 20px 17px;font-size:13px;color:var(--text-2);line-height:1.75}
/* SEO区 */
.seo{max-width:680px;margin:40px auto 0;font-size:13px;color:var(--text-2)}
.seo h2{font-size:16px;color:var(--text);margin:26px 0 10px;padding-bottom:8px;border-bottom:2px solid rgba(99,102,241,.15)}
.seo p{line-height:1.85;margin-bottom:12px}
.seo a{color:var(--primary)}
/* 页脚 */
.footer{max-width:1060px;margin:44px auto 0;padding:26px 16px 40px;border-top:1px solid var(--border);display:flex;justify-content:space-between;align-items:center;gap:14px;flex-wrap:wrap}
.footer .f-brand{font-weight:800;font-size:14px}
.footer .f-brand span{color:var(--primary)}
.footer .f-links{display:flex;gap:4px;flex-wrap:wrap}
.footer .f-links a{font-size:12.5px;color:var(--text-3);text-decoration:none;padding:6px 10px;border-radius:8px;transition:all .2s}
.footer .f-links a:hover{color:var(--primary);background:var(--grad-soft)}
.footer .f-copy{font-size:12px;color:var(--text-3);width:100%;text-align:center;margin-top:8px}
/* Toast */
.toast{position:fixed;bottom:28px;left:50%;transform:translateX(-50%) translateY(90px);background:#1e1b3a;color:#fff;padding:12px 26px;border-radius:14px;font-size:13.5px;font-weight:500;opacity:0;transition:all .35s var(--ease);pointer-events:none;z-index:999;box-shadow:0 12px 40px rgba(0,0,0,.25);display:flex;align-items:center;gap:9px;max-width:calc(100vw - 40px)}
[data-theme="dark"] .toast{background:#2a2a44;border:1px solid var(--border)}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}
/* 广告位 */
.ad-wrap{display:flex;justify-content:center;padding:10px 0;min-height:90px;overflow:hidden;max-width:680px;margin:18px auto 0}
/* 响应式 */
@media(max-width:720px){
  .features{grid-template-columns:repeat(2,1fr)}
  .qr-types{grid-template-columns:repeat(3,1fr)}
  .hero{padding:40px 16px 24px}
  .tool{padding:20px 16px;border-radius:22px}
  .nav-inner{gap:10px;padding:0 6px 0 14px;height:54px}
  .nav-links a{font-size:12.5px;padding:7px 10px}
  .nav-cta{padding:8px 14px;font-size:12px}
  .footer{flex-direction:column;text-align:center}
}

@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation-duration:.01ms!important;transition-duration:.01ms!important}}
/* ============ 内容页 ============ */
.page{max-width:720px;margin:0 auto;padding:0 16px 60px}
.page-hero{text-align:center;padding:48px 20px 28px;animation:fadeUp .6s var(--ease) both}
.page-hero .p-ic{display:inline-flex;width:54px;height:54px;border-radius:16px;background:var(--grad);color:#fff;font-size:24px;align-items:center;justify-content:center;margin-bottom:16px;box-shadow:0 8px 24px rgba(99,102,241,.3)}
.page-hero h1{font-size:30px;font-weight:800;letter-spacing:-.8px;margin-bottom:8px}
.page-hero h1 .grad{background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.page-hero p{font-size:14px;color:var(--text-2);max-width:480px;margin:0 auto}
.card{background:var(--card);backdrop-filter:blur(16px);border:1px solid var(--border);border-radius:18px;padding:26px;box-shadow:var(--shadow-sm);margin-bottom:16px;animation:fadeUp .6s .1s var(--ease) both}
.card h2{font-size:17px;font-weight:700;margin-bottom:12px;display:flex;align-items:center;gap:9px}
.card h2 .e{font-size:19px}
.card p{font-size:14px;color:var(--text-2);line-height:1.85;margin-bottom:10px}
.card p:last-child{margin-bottom:0}
.card ul{margin:0 0 10px 2px;padding:0;list-style:none}
.card ul li{font-size:14px;color:var(--text-2);line-height:1.8;padding:7px 0 7px 26px;position:relative;border-bottom:1px solid var(--border)}
.card ul li:last-child{border-bottom:0}
.card ul li::before{content:"✓";position:absolute;left:4px;color:var(--success);font-weight:700}
.card a{color:var(--primary);font-weight:600;text-decoration:none}
.card a:hover{text-decoration:underline}
.steps{display:flex;flex-direction:column;gap:0}
.step{display:flex;gap:15px;padding:15px 0;border-bottom:1px solid var(--border)}
.step:last-child{border-bottom:0}
.step .n{flex-shrink:0;width:30px;height:30px;border-radius:50%;background:var(--grad);color:#fff;font-size:13px;font-weight:700;display:flex;align-items:center;justify-content:center}
.step .t b{display:block;font-size:14px;margin-bottom:3px}
.step .t span{font-size:13px;color:var(--text-2);line-height:1.7}
/* 统计页 */
.stat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-bottom:16px}
.stat-card{background:var(--card);border:1px solid var(--border);border-radius:16px;padding:22px 16px;text-align:center;box-shadow:var(--shadow-sm)}
.stat-card .v{font-size:28px;font-weight:800;background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;letter-spacing:-.5px}
.stat-card .l{font-size:12px;color:var(--text-2);margin-top:5px}
/* 错误页 */
.err-wrap{min-height:70vh;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:40px 20px}
.err-code{font-size:110px;font-weight:800;letter-spacing:-4px;background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;line-height:1;margin-bottom:12px;animation:fadeUp .6s var(--ease) both}
.err-title{font-size:20px;font-weight:700;margin-bottom:8px}
.err-desc{font-size:14px;color:var(--text-2);margin-bottom:26px;max-width:380px}
/* 联系表单 */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
@media(max-width:640px){.contact-grid{grid-template-columns:1fr}.stat-grid{grid-template-columns:1fr 1fr}}

/* ============ 登录/个人中心 ============ */
.nav-login{font-size:13px;font-weight:700;color:var(--primary);border:1.5px solid var(--primary);padding:7px 18px;border-radius:20px;text-decoration:none;transition:all .25s}
.nav-login:hover{background:var(--grad);color:#fff;border-color:transparent;box-shadow:0 4px 14px rgba(99,102,241,.35);transform:translateY(-1px)}
.login-body{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:20px;position:relative}
.login-card{background:var(--card);backdrop-filter:blur(24px);border:1px solid var(--border);border-radius:22px;padding:42px 38px;box-shadow:var(--shadow-lg);text-align:center;width:100%;max-width:400px;animation:fadeUp .6s var(--ease) both;position:relative;z-index:1}
.login-logo{width:66px;height:66px;border-radius:18px;background:var(--grad);display:flex;align-items:center;justify-content:center;font-size:28px;font-weight:800;color:#fff;margin:0 auto 18px;box-shadow:0 10px 30px rgba(99,102,241,.35)}
.login-card h1{font-size:21px;font-weight:800;letter-spacing:-.4px;margin-bottom:6px}
.login-sub{font-size:13px;color:var(--text-3);margin-bottom:28px}
.btn-ld{display:inline-flex;align-items:center;justify-content:center;gap:10px;width:100%;padding:14px 20px;background:var(--grad);color:#fff;border:none;border-radius:14px;font-size:15px;font-weight:700;cursor:pointer;text-decoration:none;transition:all .25s}
.btn-ld:hover{transform:translateY(-2px);box-shadow:0 12px 28px rgba(99,102,241,.4)}
.login-feats{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-top:22px}
.login-feat{background:var(--grad-soft);border:1px solid var(--border);border-radius:12px;padding:12px 6px;font-size:11px;color:var(--text-2)}
.login-feat .fi{display:block;font-size:18px;margin-bottom:6px}
.user-av{width:60px;height:60px;border-radius:50%;margin-bottom:12px;border:3px solid var(--primary)}

/* ============ 导航优化 v6.1 (2026-10-12) ============ */
/* 修复 active 选择器 bug */
.nav-links a.active{color:var(--primary);background:rgba(99,102,241,.12);font-weight:600}
/* 导航链接下划线动效 */
.nav-links a{position:relative}
.nav-links a::after{content:"";position:absolute;left:13px;right:13px;bottom:5px;height:2px;border-radius:2px;background:var(--primary);transform:scaleX(0);transform-origin:left;transition:transform .25s var(--ease)}
.nav-links a:hover::after{transform:scaleX(.6)}
.nav-links a.active::after{transform:scaleX(1)}
/* 汉堡按钮 */
.nav-burger{display:none;width:38px;height:38px;border:1px solid var(--border);border-radius:11px;background:var(--card);cursor:pointer;flex-direction:column;align-items:center;justify-content:center;gap:5px;flex-shrink:0;padding:0}
.nav-burger span{display:block;width:16px;height:2px;border-radius:2px;background:var(--text-2);transition:all .25s var(--ease)}
.nav-burger:hover{border-color:var(--primary)}
.nav-burger:hover span{background:var(--primary)}
.nav.menu-open .nav-burger span:nth-child(1){transform:translateY(7px) rotate(45deg);background:var(--primary)}
.nav.menu-open .nav-burger span:nth-child(2){opacity:0;transform:scaleX(0)}
.nav.menu-open .nav-burger span:nth-child(3){transform:translateY(-7px) rotate(-45deg);background:var(--primary)}
/* 移动端下拉菜单 */
.nav-mobile{display:none}
@media(max-width:680px){
  .nav-links{display:none}
  .nav-burger{display:flex}
  .nav-inner{gap:10px}
  .nav-mobile{display:block;position:absolute;top:calc(100% + 8px);left:0;right:0;background:var(--nav-bg);backdrop-filter:blur(20px) saturate(1.4);-webkit-backdrop-filter:blur(20px) saturate(1.4);border:1px solid var(--border);border-radius:16px;box-shadow:var(--shadow);padding:8px;opacity:0;transform:translateY(-10px) scale(.98);transform-origin:top center;pointer-events:none;transition:opacity .22s var(--ease),transform .22s var(--ease);z-index:99}
  .nav.menu-open .nav-mobile{opacity:1;transform:none;pointer-events:auto}
  .nav-mobile a{display:flex;align-items:center;gap:10px;padding:12px 14px;border-radius:10px;color:var(--text-2);text-decoration:none;font-size:14px;font-weight:500;transition:all .15s var(--ease)}
  .nav-mobile a:hover{background:var(--grad-soft);color:var(--text);transform:translateX(3px)}
  .nav-mobile a.active{color:var(--primary);background:rgba(99,102,241,.12);font-weight:600}
}
@media(max-width:420px){
  .nav-cta{padding:8px 12px;font-size:12px}
  .nav-login{padding:6px 14px;font-size:12px}
  .logo-text{display:none}
}
/* ===== 语言切换器 v2.0 · 精美玻璃拟态 ===== */
.lang-wrap{position:relative;display:inline-block}
.lang-btn{display:inline-flex;align-items:center;gap:7px;background:color-mix(in srgb,var(--card) 75%,transparent);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);border:1px solid var(--border);border-radius:999px;padding:7px 13px 7px 11px;font-size:13px;font-weight:500;color:var(--text);cursor:pointer;transition:transform .22s cubic-bezier(.34,1.56,.64,1),box-shadow .22s,border-color .22s;box-shadow:0 2px 10px rgba(0,0,0,.06);line-height:1;white-space:nowrap}
.lang-btn:hover{transform:translateY(-1px);border-color:rgba(99,102,241,.45);box-shadow:0 6px 20px rgba(99,102,241,.18)}
.lang-btn:active{transform:translateY(0) scale(.97)}
.lang-btn .globe{font-size:15px;line-height:1;filter:saturate(1.2)}
.lang-btn .lang-cur{letter-spacing:.02em}
.lang-arrow{font-size:9px;opacity:.55;transition:transform .25s cubic-bezier(.4,0,.2,1);margin-left:1px}
.lang-wrap.open .lang-arrow{transform:rotate(180deg)}
.lang-wrap.open .lang-btn{border-color:rgba(99,102,241,.5);box-shadow:0 6px 20px rgba(99,102,241,.22)}
.lang-menu{position:absolute;top:calc(100% + 10px);right:0;min-width:148px;background:color-mix(in srgb,var(--card) 82%,transparent);-webkit-backdrop-filter:blur(22px) saturate(1.4);backdrop-filter:blur(22px) saturate(1.4);border:1px solid var(--border);border-radius:16px;box-shadow:0 16px 48px rgba(0,0,0,.16),0 2px 8px rgba(0,0,0,.08);padding:6px;z-index:200;opacity:0;transform:translateY(-10px) scale(.95);transform-origin:top right;pointer-events:none;transition:opacity .22s cubic-bezier(.4,0,.2,1),transform .28s cubic-bezier(.34,1.4,.64,1)}
.lang-wrap.open .lang-menu{opacity:1;transform:translateY(0) scale(1);pointer-events:auto}
/* 小三角 */
.lang-menu::before{content:"";position:absolute;top:-6px;right:22px;width:11px;height:11px;background:inherit;border-left:1px solid var(--border);border-top:1px solid var(--border);transform:rotate(45deg);border-top-left-radius:3px}
.lang-opt{display:flex;align-items:center;justify-content:space-between;gap:10px;width:100%;text-align:left;background:none;border:none;padding:10px 12px;font-size:13.5px;color:var(--text);border-radius:11px;cursor:pointer;transition:background .15s,transform .15s;position:relative}
.lang-opt:hover{background:rgba(99,102,241,.1);transform:translateX(2px)}
.lang-opt .check{font-size:13px;color:#6366f1;font-weight:700;opacity:0;transform:scale(.5);transition:opacity .2s,transform .25s cubic-bezier(.34,1.56,.64,1)}
.lang-opt.on{color:#6366f1;font-weight:600;background:rgba(99,102,241,.1)}
.lang-opt.on .check{opacity:1;transform:scale(1)}
/* 深色模式微调 */
[data-theme="dark"] .lang-btn{box-shadow:0 2px 10px rgba(0,0,0,.3)}
[data-theme="dark"] .lang-btn:hover{box-shadow:0 6px 20px rgba(99,102,241,.25)}
[data-theme="dark"] .lang-menu{box-shadow:0 16px 48px rgba(0,0,0,.5),0 2px 8px rgba(0,0,0,.3)}
[data-theme="dark"] .lang-opt.on{color:#a5b4fc}
/* 移动端 */
@media(max-width:680px){.lang-btn{padding:6px 10px 6px 9px;font-size:12px}.lang-btn .globe{font-size:14px}.lang-menu{min-width:136px;right:-4px}}