/* ============================================================
   dao · 开发官网 —— 基底(排版/纹理/手绘件/通用组件)
   ============================================================ */
*,*::before,*::after{ box-sizing:border-box; }
html{ -webkit-text-size-adjust:100%; }
body{
  margin:0;
  background:var(--ink);
  color:var(--tx);
  font-family:var(--f-body);
  font-weight:400;
  line-height:1.7;
  font-size:15px;
  letter-spacing:.01em;
  overflow-x:hidden;
}
img{ display:block; max-width:100%; }
a{ color:inherit; text-decoration:none; }
button{ font-family:inherit; color:inherit; }
::selection{ background:rgba(202,43,46,.4); }

/* —— 宣纸/纤维噪点底(一次性 SVG tile, 极低透明度打破纯平) —— */
body::before{
  content:"";
  position:fixed; inset:0;
  z-index:0; pointer-events:none;
  background-image:url("../assets/texture/grain.svg");
  background-size:340px 340px;
  opacity:.5;                 /* tile 自身已极淡, 这里再压 */
  mix-blend-mode:overlay;
}
/* 顶部一束暖金光晕(战报同款, 定整站暖调) */
body::after{
  content:"";
  position:fixed; inset:0 0 auto 0; height:70vh;
  z-index:0; pointer-events:none;
  background:radial-gradient(ellipse 900px 480px at 50% -10%, var(--gold-glow) 0%, transparent 60%);
}

#app{ position:relative; z-index:1; }

/* —— 竖排幽灵大字 —— */
.ghost{
  position:fixed; z-index:0; pointer-events:none;
  font-family:var(--f-song); font-weight:700;
  writing-mode:vertical-rl;
  font-size:min(46vh,420px);
  line-height:1;
  color:var(--tx);
  opacity:.035;
  right:2vw; top:8vh;
  user-select:none;
}

/* ============ 页头 ============ */
.site-head{
  position:sticky; top:0; z-index:60;
  display:flex; align-items:center; gap:28px;
  padding:0 clamp(16px,4vw,44px);
  height:64px;
  background:linear-gradient(rgba(20,17,12,.92), rgba(20,17,12,.80));
  backdrop-filter:blur(6px);
  border-bottom:1px solid var(--line);
}
.brand{ display:flex; align-items:center; gap:12px; flex:none; }
.brand .seal{
  width:34px; height:34px; flex:none;
  filter:drop-shadow(0 1px 0 rgba(0,0,0,.4));
}
.brand .brand-name{
  font-family:var(--f-song); font-weight:700; font-size:19px; letter-spacing:.06em;
}
.brand .brand-sub{
  font-size:11px; color:var(--tx-dim); letter-spacing:.34em; margin-left:2px;
}
.site-nav{ display:flex; gap:4px; margin-left:auto; }
.site-nav a{
  position:relative; padding:8px 14px; font-size:14px; color:var(--tx-dim);
  letter-spacing:.08em; border-radius:4px;
  transition:color var(--hover-s) var(--ease);
}
.site-nav a:hover{ color:var(--tx); }
.site-nav a.on{ color:var(--tx); font-weight:600; }
.site-nav a.on::after{
  content:""; position:absolute; left:14px; right:14px; bottom:2px; height:2px;
  background:var(--gold-500); border-radius:2px;
}

/* ============ 通用布局 ============ */
.wrap{ max-width:1200px; margin:0 auto; padding:0 clamp(16px,4vw,40px); }
.section{ position:relative; padding:clamp(30px,6vh,64px) 0; }
.section + .section{ border-top:1px dashed var(--line); }
.sec-head{ margin-bottom:26px; }
.sec-eyebrow{
  font-family:var(--f-mono); font-size:11px; letter-spacing:.34em;
  color:var(--gold-soft); text-transform:uppercase;
}
.sec-title{
  font-family:var(--f-song); font-weight:700; margin:6px 0 4px;
  font-size:clamp(24px,3.4vw,34px); letter-spacing:.04em;
}
.sec-sub{ color:var(--tx-dim); font-size:13px; max-width:640px; }

/* 手绘笔触分隔线 */
.brushline{
  height:14px; width:190px; margin-top:8px;
  background:url("../assets/texture/brushline.svg") no-repeat left center/contain;
  opacity:.85;
}

/* ============ 通用组件 ============ */
.card{
  background:linear-gradient(160deg, var(--paper), var(--paper-2));
  border:1px solid var(--line); border-radius:var(--radius-lg);
  box-shadow:0 6px 18px rgba(0,0,0,.35);
}
.chip{
  display:inline-block; padding:3px 10px; font-size:12px; border-radius:20px;
  background:var(--paper-3); border:1px solid var(--line); color:var(--tx-dim);
  letter-spacing:.05em;
}
.num{ font-family:var(--f-mono); font-variant-numeric:tabular-nums; }

/* 手绘贴纸(日期章/标记), 微旋转像随手贴上 */
.sticker{
  display:inline-flex; align-items:center; justify-content:center;
  font-family:var(--f-song); font-weight:700; color:var(--ink-950);
  background:var(--gold-500); border-radius:4px;
  padding:4px 9px; font-size:13px; letter-spacing:.1em;
  box-shadow:0 3px 8px rgba(0,0,0,.45), inset 0 0 0 1px rgba(255,255,255,.18);
  transform:rotate(-2.5deg);
}
.sticker.alt{ background:var(--gold-700); transform:rotate(2deg); }

/* 焦点环(键盘可达) */
:focus-visible{ outline:2px solid var(--gold-500); outline-offset:2px; border-radius:3px; }

/* 细节展开小箭头 */
.chev{ width:10px; height:10px; border-right:2px solid var(--tx-dim); border-bottom:2px solid var(--tx-dim); transform:rotate(45deg); }

/* 滚动条 */
::-webkit-scrollbar{ width:10px; height:10px; }
::-webkit-scrollbar-track{ background:var(--ink-950); }
::-webkit-scrollbar-thumb{ background:#3a3020; border-radius:6px; border:2px solid var(--ink-950); }
::-webkit-scrollbar-thumb:hover{ background:#54432a; }

/* 页面切换 */
.view{ display:none; }
.view.on{ display:block; animation:viewIn .28s var(--ease); }
@keyframes viewIn{ from{ opacity:0; transform:translateY(10px);} to{ opacity:1; transform:none;} }

/* 页脚 */
.site-foot{
  border-top:1px solid var(--line-soft); margin-top:40px;
  padding:26px clamp(16px,4vw,44px) 34px;
  color:var(--tx-faint); font-size:12px; letter-spacing:.04em;
  display:flex; flex-wrap:wrap; gap:8px 26px; align-items:center;
}
.site-foot .foot-note{ margin-left:auto; font-family:var(--f-mono); font-size:11px; }

/* 响应式 */
@media (max-width:760px){
  .site-head{ gap:12px; height:56px; }
  .brand .brand-sub{ display:none; }
  .site-nav a{ padding:8px 9px; font-size:13px; }
  .ghost{ display:none; }
}