/* Kore Cloud · 统一设计系统
   浅色纸感 + 衬线排版 + 细线分隔，面向发布页、账户中心、更新日志、法律页与管理后台。 */
:root{
  --bg:#f6f3ea;
  --bg-2:#efeade;
  --panel:#fbf9f3;
  --panel-solid:#fffdf8;
  --ink:#15171c;
  --ink-soft:#3b3d43;
  --muted:#6d685c;
  --dim:#847f6f;
  --line:rgba(21,23,28,.14);
  --line-strong:rgba(21,23,28,.24);
  --cyan:#2d5a93;      /* 兼容旧变量名：主强调色 = 海军蓝 */
  --violet:#a8854f;    /* 兼容旧变量名：次强调色 = 古铜 */
  --amber:#a8854f;
  --mint:#3f7d5c;
  --danger:#b4433c;
  --glow:0 18px 44px rgba(21,23,28,.10);
  --radius:2px;
  --radius-sm:2px;
  --max:1220px;
  --font:"Noto Serif SC","Source Han Serif SC","Songti SC","STSong","SimSun",Georgia,serif;
  --latin:"Cormorant Garamond","Didot",Georgia,"Times New Roman",serif;
  --sans:"Inter","Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  --mono:"JetBrains Mono","SFMono-Regular",ui-monospace,Consolas,monospace;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--bg);color:var(--ink);font-family:var(--font);
  line-height:1.7;letter-spacing:.01em;overflow-x:hidden;-webkit-font-smoothing:antialiased;
}
body::before{
  content:"";position:fixed;inset:0;pointer-events:none;z-index:0;
  background:
    radial-gradient(1100px 620px at 78% -8%, rgba(65,120,170,.09), transparent 62%),
    radial-gradient(820px 520px at 6% 12%, rgba(168,133,79,.07), transparent 60%);
}
body::after{
  content:"";position:fixed;inset:0;pointer-events:none;z-index:0;opacity:.22;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='180' height='180' filter='url(%23n)' opacity='.30'/%3E%3C/svg%3E");
  mix-blend-mode:multiply;
}
main,header,footer,section{position:relative;z-index:1}
a{color:inherit;text-decoration:none}
button{font-family:inherit}
img{max-width:100%;display:block}
::selection{background:rgba(45,90,147,.18);color:var(--ink)}

.wrap{width:min(var(--max),calc(100% - 56px));margin:0 auto}
.eyebrow{
  display:inline-flex;align-items:center;gap:12px;font-family:var(--sans);
  font-size:11.5px;letter-spacing:.26em;text-transform:uppercase;color:var(--muted);font-weight:500;
}
.eyebrow::before{content:"";width:30px;height:1px;background:var(--ink);opacity:.45}
h1,h2,h3,h4{margin:0;font-weight:600;line-height:1.16;letter-spacing:-.01em}
p{margin:0;color:var(--muted)}
.lead{color:var(--muted);font-size:16.5px;line-height:1.9}

.grad-text{color:var(--navy);background:none;-webkit-text-fill-color:currentColor}

/* ---------------- 导航 ---------------- */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:80;
  transition:background .45s ease,border-color .45s,backdrop-filter .45s;
  border-bottom:1px solid transparent;
}
.nav.solid{background:rgba(246,243,234,.82);backdrop-filter:blur(22px) saturate(1.15);border-bottom-color:var(--line)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:76px}
.brand{display:flex;align-items:center;gap:12px}
.brand-mark{width:42px;height:30px;flex:none;background:url("kore-mark.png") center/contain no-repeat}
.brand b{display:block;font-family:var(--latin);font-size:17px;letter-spacing:.26em;font-weight:600}
.brand small{display:block;font-family:var(--sans);font-size:10px;letter-spacing:.22em;color:var(--dim);margin-top:1px;font-weight:500}
.nav-links{display:flex;align-items:center;gap:32px;font-family:var(--sans);font-size:12.5px;letter-spacing:.08em;color:var(--ink-soft)}
.nav-links a{position:relative;padding:7px 0;transition:color .3s}
.nav-links a::after{content:"";position:absolute;left:0;right:0;bottom:0;height:1px;background:var(--ink);transform:scaleX(0);transform-origin:right;transition:transform .45s cubic-bezier(.2,.7,.25,1)}
.nav-links a:hover::after{transform:scaleX(1);transform-origin:left}
.nav-cta{display:flex;align-items:center;gap:10px}
.nav-toggle{display:none}

/* ---------------- 按钮 ---------------- */
.btn{
  position:relative;display:inline-flex;align-items:center;justify-content:center;gap:9px;
  padding:13px 24px;border-radius:var(--radius);border:1px solid var(--ink);background:var(--ink);color:var(--bg);
  font-family:var(--sans);font-size:12.5px;font-weight:500;letter-spacing:.07em;cursor:pointer;white-space:nowrap;
  transition:transform .4s cubic-bezier(.2,.7,.25,1),background .4s,color .4s,box-shadow .4s;overflow:hidden;
}
.btn::after{content:"";position:absolute;inset:0;background:linear-gradient(110deg,transparent 20%,rgba(255,255,255,.16) 50%,transparent 78%);transform:translateX(-120%);transition:transform .8s ease}
.btn:hover{transform:translateY(-2px);box-shadow:0 16px 36px rgba(21,23,28,.16)}
.btn:hover::after{transform:translateX(120%)}
.btn.ghost{background:transparent;color:var(--ink);border-color:var(--line);box-shadow:none}
.btn.ghost:hover{border-color:var(--ink);box-shadow:none}
.btn.sm{padding:9px 16px;font-size:11.5px}
.btn.lg{padding:17px 34px;font-size:13.5px}
.btn.block{width:100%}
.btn[disabled]{opacity:.5;pointer-events:none}
.btn.quiet{background:transparent;color:var(--muted);border:1px solid var(--line);box-shadow:none}
.btn.admin{background:var(--violet);border-color:var(--violet);color:#1a1408;box-shadow:none}
.btn.admin:hover{border-color:var(--violet)}

.link-arrow{display:inline-flex;align-items:center;gap:8px;font-family:var(--sans);font-size:12px;letter-spacing:.06em;color:var(--navy)}
.link-arrow svg{transition:transform .4s ease}
.link-arrow:hover svg{transform:translateX(4px)}

/* ---------------- 通用卡片 ---------------- */
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 20px 50px rgba(21,23,28,.06)}
.pill{display:inline-flex;align-items:center;gap:8px;padding:7px 13px;border-radius:999px;border:1px solid var(--line);background:rgba(255,255,255,.4);font-family:var(--sans);font-size:11.5px;color:var(--muted)}
.dot{width:5px;height:5px;border-radius:50%;background:var(--navy);box-shadow:0 0 8px rgba(45,90,147,.5)}

/* ---------------- 表单 ---------------- */
.field{margin-bottom:16px}
.field label{display:block;font-family:var(--sans);font-size:11.5px;letter-spacing:.08em;color:var(--muted);margin-bottom:8px}
.input{
  width:100%;padding:13px 15px;border-radius:var(--radius);border:1px solid var(--line);
  background:rgba(255,255,255,.55);color:var(--ink);font-size:14.5px;font-family:var(--font);outline:none;
  transition:border-color .25s,background .25s,box-shadow .25s;
}
.input::placeholder{color:#a39d8d}
.input:focus{border-color:var(--navy);background:#fffdf8;box-shadow:0 0 0 3px rgba(45,90,147,.10)}
.input-row{display:flex;gap:10px}
.hint{font-size:12px;color:var(--dim);margin-top:8px}
.err{color:var(--danger);font-size:12.5px;margin-top:8px;min-height:18px}
.ok{color:var(--mint)}

/* ---------------- 表格 ---------------- */
.table{width:100%;border-collapse:collapse;font-size:13px}
.table th{
  text-align:left;font-family:var(--sans);font-weight:500;color:var(--dim);font-size:10px;letter-spacing:.14em;
  text-transform:uppercase;padding:12px 14px;border-bottom:1px solid var(--line);
}
.table td{padding:13px 14px;border-bottom:1px solid var(--line);color:var(--ink-soft,var(--ink))}
.table tr:hover td{background:rgba(255,255,255,.5)}
.table .num{font-family:var(--mono);font-variant-numeric:tabular-nums}
.table-wrap{overflow-x:auto}

/* ---------------- 弹层 / 提示 ---------------- */
.toast{
  position:fixed;left:50%;bottom:28px;transform:translate(-50%,20px);z-index:200;
  background:var(--ink);border:1px solid var(--ink);color:var(--bg);
  padding:12px 18px;border-radius:var(--radius);font-family:var(--sans);font-size:12.5px;opacity:0;pointer-events:none;
  transition:opacity .3s,transform .3s;box-shadow:0 18px 40px rgba(21,23,28,.24);
}
.toast.show{opacity:1;transform:translate(-50%,0)}
.toast.bad{background:var(--danger);border-color:var(--danger)}

/* ---------------- 滚动动效 ---------------- */
.reveal{opacity:0;transform:translateY(20px);transition:opacity .8s cubic-bezier(.2,.7,.25,1),transform .8s cubic-bezier(.2,.7,.25,1)}
.reveal.in{opacity:1;transform:none}
.reveal.d1{transition-delay:.08s}.reveal.d2{transition-delay:.16s}.reveal.d3{transition-delay:.24s}.reveal.d4{transition-delay:.32s}

@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-10px)}}
@keyframes spin-slow{to{transform:rotate(360deg)}}
@keyframes pulse-glow{0%,100%{opacity:.55}50%{opacity:1}}
@keyframes shimmer{to{background-position:200% 0}}

footer.site{border-top:1px solid var(--line);margin-top:80px;padding:44px 0 40px;color:var(--dim);font-size:12.5px}
.foot-grid{display:flex;justify-content:space-between;gap:30px;flex-wrap:wrap}
.foot-links{display:flex;gap:22px;flex-wrap:wrap;font-family:var(--sans);font-size:11.5px;letter-spacing:.04em}
.foot-links a:hover{color:var(--navy)}

@media (max-width:900px){
  .wrap{width:calc(100% - 36px)}
  .nav-inner{height:66px}
  .nav-links{
    position:fixed;inset:66px 0 auto 0;flex-direction:column;align-items:flex-start;gap:0;
    background:rgba(246,243,234,.97);backdrop-filter:blur(24px);border-bottom:1px solid var(--line);
    padding:12px 18px 22px;transform:translateY(-130%);transition:transform .5s cubic-bezier(.2,.7,.25,1);
  }
  .nav-links.open{transform:none}
  .nav-links a{width:100%;padding:14px 2px;border-bottom:1px solid var(--line);font-size:14px}
  .nav-cta .btn{padding:9px 15px;font-size:11.5px}
  .nav-toggle{
    display:inline-flex;width:38px;height:38px;align-items:center;justify-content:center;
    background:none;border:1px solid var(--line);border-radius:var(--radius);color:var(--ink);
  }
  .nav-toggle span{width:16px;height:1.4px;background:currentColor;display:block;position:relative}
  .nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:16px;height:1.4px;background:currentColor;transition:transform .3s,top .3s}
  .nav-toggle span::before{top:-5px}.nav-toggle span::after{top:5px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms!important;transition-duration:.001ms!important}
  .reveal{opacity:1;transform:none}
}