/* ============================================
   人民中转 · Claude.ai 同款设计系统
   ============================================ */

/* --- Reset --- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}

/* --- Design Tokens --- */
:root{
  --bg:        #0c0c0d;
  --bg-2:      #171717;
  --bg-3:      #1e1e1e;
  --bg-card:   #1a1a1a;
  --bg-hover:  #222;
  --bg-input:  #141414;

  --border:    #2a2a2a;
  --border-hi: #3a3a3a;

  --t1:        #f0f0f0;
  --t2:        #a0a0a0;
  --t3:        #666;

  --orange:    #d97706;
  --orange-l:  #f59e0b;
  --orange-bg: rgba(217,119,6,.1);

  --green:     #34d399;
  --green-bg:  rgba(52,211,153,.1);
  --red:       #f87171;
  --red-bg:    rgba(248,113,113,.1);
  --blue:      #60a5fa;
  --blue-bg:   rgba(96,165,250,.1);

  --r-sm:  6px;
  --r-md:  10px;
  --r-lg:  16px;

  --font: -apple-system,BlinkMacSystemFont,"SF Pro Display","SF Pro Text",Inter,"Noto Sans SC",sans-serif;
  --mono: "SF Mono",JetBrains Mono,"Fira Code",ui-monospace,monospace;
}

html{font-size:16px;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}
body{font-family:var(--font);color:var(--t1);background:var(--bg);line-height:1.6;min-height:100vh}
::selection{background:var(--orange-bg);color:var(--orange-l)}
a{color:var(--orange);text-decoration:none;transition:color .15s}
a:hover{color:var(--orange-l)}
img{max-width:100%;display:block}
input,button,select,textarea{font:inherit;color:inherit}

/* --- Typography --- */
h1,h2,h3{font-weight:600;line-height:1.25;letter-spacing:-.02em}
h1{font-size:clamp(2rem,5vw,3.25rem)}
h2{font-size:1.75rem}
h3{font-size:1.125rem}

.muted{color:var(--t2)}
.text-xs{font-size:.75rem}
.text-sm{font-size:.875rem}

code{background:var(--bg-2);padding:.125rem .375rem;border-radius:4px;font-family:var(--mono);font-size:.85em}

/* --- Layout --- */
.container{max-width:1120px;margin:0 auto;padding:0 1.5rem}

/* --- Navbar --- */
.nav{position:fixed;top:0;left:0;right:0;z-index:100;height:60px;background:rgba(12,12,13,.85);backdrop-filter:blur(16px) saturate(1.4);-webkit-backdrop-filter:blur(16px) saturate(1.4);border-bottom:1px solid var(--border)}
.nav .container{display:flex;align-items:center;justify-content:space-between;height:100%}
.nav-brand{display:flex;align-items:center;gap:.6rem;font-weight:700;font-size:1.15rem;color:var(--t1)}
.nav-brand svg{flex-shrink:0}
.nav-links{display:flex;align-items:center;gap:.25rem;list-style:none}
.nav-links a{display:block;padding:.4rem .75rem;border-radius:var(--r-sm);color:var(--t2);font-size:.9rem;transition:all .15s}
.nav-links a:hover{color:var(--t1);background:var(--bg-2)}
.nav-links a.on{color:var(--t1);background:var(--orange-bg)}
.nav-btn{display:none;background:none;border:none;color:var(--t2);font-size:1.25rem;cursor:pointer;padding:.5rem}

@media(max-width:768px){
  .nav-btn{display:block}
  .nav-links{display:none;position:absolute;top:60px;left:0;right:0;background:var(--bg);border-bottom:1px solid var(--border);flex-direction:column;padding:.5rem}
  .nav-links.open{display:flex}
}

/* --- Buttons --- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;padding:.6rem 1.25rem;border-radius:var(--r-md);font-size:.9rem;font-weight:500;border:none;cursor:pointer;transition:all .15s;text-decoration:none;white-space:nowrap}
.btn-p{background:var(--orange);color:#fff}
.btn-p:hover{background:var(--orange-l);transform:translateY(-1px);box-shadow:0 4px 16px rgba(217,119,6,.2)}
.btn-s{background:var(--bg-3);color:var(--t1);border:1px solid var(--border)}
.btn-s:hover{border-color:var(--border-hi);background:var(--bg-hover)}
.btn-g{background:transparent;color:var(--t2)}
.btn-g:hover{color:var(--t1);background:var(--bg-2)}
.btn-sm{padding:.35rem .75rem;font-size:.8rem;border-radius:var(--r-sm)}
.btn-lg{padding:.75rem 1.75rem;font-size:1rem}
.btn-xl{padding:.875rem 2.25rem;font-size:1.05rem}
.btn:disabled{opacity:.5;cursor:not-allowed}

/* --- Cards --- */
.card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--r-lg);overflow:hidden;transition:border-color .2s}
.card:hover{border-color:var(--border-hi)}
.card-h{padding:.875rem 1.25rem;border-bottom:1px solid var(--border);font-weight:600;font-size:.95rem}
.card-b{padding:1.25rem}

/* --- Forms --- */
.fg{margin-bottom:1.125rem}
.fl{display:block;font-size:.8rem;font-weight:500;color:var(--t2);margin-bottom:.35rem}
.fi{width:100%;padding:.65rem .875rem;font-size:.9rem;border:1px solid var(--border);border-radius:var(--r-sm);background:var(--bg-input);color:var(--t1);outline:none;transition:border-color .15s,box-shadow .15s}
.fi:focus{border-color:var(--orange);box-shadow:0 0 0 3px var(--orange-bg)}
.fi::placeholder{color:var(--t3)}
select.fi{cursor:pointer}
select.fi option{background:var(--bg-card)}
.fh{font-size:.75rem;color:var(--t3);margin-top:.25rem}

/* --- Alerts --- */
.alert{padding:.65rem 1rem;border-radius:var(--r-sm);font-size:.85rem;margin-bottom:1rem;border:1px solid transparent}
.alert-ok{background:var(--green-bg);color:var(--green);border-color:rgba(52,211,153,.15)}
.alert-err{background:var(--red-bg);color:var(--red);border-color:rgba(248,113,113,.15)}
.alert-info{background:var(--blue-bg);color:var(--blue);border-color:rgba(96,165,250,.15)}
.alert-warn{background:rgba(251,191,36,.1);color:#fbbf24;border-color:rgba(251,191,36,.15)}

/* --- Badge --- */
.badge{display:inline-flex;align-items:center;gap:.25rem;padding:.125rem .5rem;font-size:.7rem;font-weight:500;border-radius:999px}
.badge-g{background:var(--green-bg);color:var(--green)}
.badge-r{background:var(--red-bg);color:var(--red)}
.badge-b{background:var(--blue-bg);color:var(--blue)}
.badge-o{background:var(--orange-bg);color:var(--orange)}

/* --- Status dot --- */
.dot{display:inline-block;width:7px;height:7px;border-radius:50%;margin-right:.35rem;vertical-align:middle}
.dot.on{background:var(--green);box-shadow:0 0 6px rgba(52,211,153,.5)}
.dot.off{background:var(--red);box-shadow:0 0 6px rgba(248,113,113,.4)}

/* --- Loading & Toast --- */
.loading{display:flex;flex-direction:column;align-items:center;padding:2rem;color:var(--t3)}
.spinner{width:24px;height:24px;border:2px solid var(--border);border-top-color:var(--orange);border-radius:50%;animation:spin .7s linear infinite;margin-bottom:.75rem}
@keyframes spin{to{transform:rotate(360deg)}}

.toast{position:fixed;bottom:1.5rem;left:50%;transform:translateX(-50%) translateY(80px);background:var(--bg-3);border:1px solid var(--border-hi);border-radius:var(--r-md);padding:.65rem 1.25rem;font-size:.85rem;z-index:999;transition:transform .3s ease;box-shadow:0 8px 32px rgba(0,0,0,.5)}
.toast.show{transform:translateX(-50%) translateY(0)}
.toast.err{border-color:var(--red)}

/* --- Empty state --- */
.empty{text-align:center;padding:3rem 1rem;color:var(--t3)}
.empty p{margin-bottom:.375rem}

/* --- Hero --- */
.hero{padding:9rem 0 4rem;text-align:center;position:relative;overflow:hidden}
.hero::before{content:"";position:absolute;top:-120px;left:50%;transform:translateX(-50%);width:800px;height:500px;background:radial-gradient(ellipse,rgba(217,119,6,.07) 0%,transparent 70%);pointer-events:none}
.hero-badge{display:inline-block;padding:.25rem .875rem;border-radius:999px;font-size:.75rem;color:var(--orange);border:1px solid var(--orange-bg);background:var(--orange-bg);margin-bottom:1.25rem;letter-spacing:.02em}
.hero h1{margin-bottom:1rem}
.hero .accent{color:var(--orange)}
.hero-sub{font-size:1.125rem;color:var(--t2);max-width:520px;margin:0 auto 2rem;line-height:1.7}
.hero-btns{display:flex;gap:.75rem;justify-content:center;flex-wrap:wrap}
.hero-stats{display:flex;gap:3rem;justify-content:center;margin-top:3rem;padding-top:2rem;border-top:1px solid var(--border)}
.hero-stats .num{display:block;font-size:1.5rem;font-weight:700;color:var(--t1)}
.hero-stats .lbl{font-size:.75rem;color:var(--t3)}
@media(max-width:768px){.hero{padding:7rem 0 3rem}.hero-sub{font-size:1rem}.hero-stats{gap:1.5rem}}

/* --- Section --- */
.sec{padding:4rem 0}
.sec-h2{text-align:center;margin-bottom:2.5rem}
.sec-h2 h2{margin-bottom:.375rem}
.sec-h2 p{color:var(--t2);font-size:.95rem}
.sec-dark{background:var(--bg-2);border-top:1px solid var(--border);border-bottom:1px solid var(--border)}

/* --- Steps --- */
.steps{display:flex;align-items:center;justify-content:center;gap:1rem;flex-wrap:wrap}
.step{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--r-lg);padding:1.75rem;width:280px;transition:border-color .2s}
.step:hover{border-color:var(--border-hi)}
.step-n{font-size:1.75rem;font-weight:700;color:var(--orange);opacity:.6;font-family:var(--mono);margin-bottom:.5rem}
.step h3{margin-bottom:.375rem}
.step p{color:var(--t2);font-size:.875rem;line-height:1.6}
.step-arr{color:var(--t3);font-size:1.25rem}
@media(max-width:768px){.step-arr{display:none}.steps{flex-direction:column}}

/* --- Features --- */
.feat-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:1rem}
.feat{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--r-lg);padding:1.5rem;transition:all .2s}
.feat:hover{border-color:var(--border-hi);transform:translateY(-2px)}
.feat-icon{font-size:1.5rem;margin-bottom:.75rem}
.feat h3{margin-bottom:.375rem}
.feat p{color:var(--t2);font-size:.875rem;line-height:1.6}

/* --- Model grid --- */
.model-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:1rem}
.model-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--r-md);padding:1.125rem;transition:all .2s}
.model-card:hover{border-color:var(--border-hi);transform:translateY(-1px)}
.model-card .head{display:flex;justify-content:space-between;align-items:center;margin-bottom:.5rem}
.model-card .tag{font-size:.7rem;font-weight:600;color:var(--orange);text-transform:uppercase;letter-spacing:.06em}
.model-card .count{font-size:.7rem;color:var(--t3)}
.model-card .models{display:flex;flex-wrap:wrap;gap:.25rem}
.model-card .mtag{font-size:.65rem;padding:.1rem .4rem;background:var(--bg-2);border-radius:999px;color:var(--t2);border:1px solid var(--border)}

/* --- Search & Filters --- */
.search{display:flex;gap:.5rem;margin-bottom:1rem}
.search .fi{flex:1}
.pills{display:flex;gap:.375rem;flex-wrap:wrap;margin-bottom:1.5rem}
.pill{padding:.3rem .75rem;border-radius:999px;font-size:.8rem;background:var(--bg-card);border:1px solid var(--border);color:var(--t2);cursor:pointer;transition:all .15s}
.pill:hover{border-color:var(--border-hi);color:var(--t1)}
.pill.on{background:var(--orange-bg);border-color:var(--orange);color:var(--orange-l)}

/* --- API item --- */
.api-row{display:flex;align-items:flex-start;justify-content:space-between;padding:.875rem 1.25rem;border-bottom:1px solid var(--border)}
.api-row:last-child{border-bottom:none}
.api-info{flex:1;min-width:0}
.api-info .name{font-weight:500;font-size:.9rem}
.api-info .url{font-size:.75rem;color:var(--t3);font-family:var(--mono);margin-top:.125rem;word-break:break-all}
.api-info .models{display:flex;flex-wrap:wrap;gap:.25rem;margin-top:.375rem}
.api-actions{text-align:right;flex-shrink:0;margin-left:1rem}

/* --- Key display --- */
.key-box{display:flex;align-items:center;gap:.5rem;padding:.6rem .875rem;background:var(--bg-2);border:1px solid var(--border);border-radius:var(--r-sm);font-family:var(--mono);font-size:.8rem;word-break:break-all;cursor:pointer;user-select:all;transition:border-color .15s}
.key-box:hover{border-color:var(--border-hi)}

/* --- Auth pages --- */
.auth-page{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:6rem 1.5rem 2rem}
.auth-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--r-lg);padding:2rem;width:100%;max-width:400px}
.auth-card h2{text-align:center;margin-bottom:.25rem}
.auth-card .sub{text-align:center;color:var(--t2);margin-bottom:1.5rem;font-size:.9rem}
.auth-or{text-align:center;margin:1.25rem 0;color:var(--t3);font-size:.8rem;position:relative}
.auth-or::before,.auth-or::after{content:"";position:absolute;top:50%;width:30%;height:1px;background:var(--border)}
.auth-or::before{left:0}
.auth-or::after{right:0}

/* --- Dashboard --- */
.dash{padding:5.5rem 0 3rem}
.dash-top{display:flex;justify-content:space-between;align-items:flex-start;flex-wrap:wrap;gap:.75rem;margin-bottom:1.5rem}
.dash-grid{display:grid;grid-template-columns:2fr 1fr;gap:1.25rem}
@media(max-width:900px){.dash-grid{grid-template-columns:1fr}}

.stat-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(130px,1fr));gap:.75rem;margin-bottom:1.25rem}
.stat-box{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--r-md);padding:.875rem 1.125rem}
.stat-box .val{font-size:1.375rem;font-weight:700;line-height:1}
.stat-box .lbl{font-size:.7rem;color:var(--t3);margin-top:.25rem}

/* --- Footer --- */
.footer{padding:2rem 0;border-top:1px solid var(--border);text-align:center;color:var(--t3);font-size:.8rem}
.footer .note{margin-top:.25rem;font-size:.7rem}

/* --- CTA section --- */
.cta{padding:5rem 0;text-align:center;background:radial-gradient(ellipse at 50% 100%,rgba(217,119,6,.04) 0%,transparent 60%)}
.cta h2{margin-bottom:.625rem}
.cta p{color:var(--t2);max-width:420px;margin:0 auto 1.5rem;font-size:.95rem}