/* ============ 兑换码 · 二级页（勾选划线 + 奖励 + 复制） ============
   主题配色与全站一致：深夜蓝黑底 + 霓虹青/幻紫 + 高亮金 */
:root{
  --bg:#0d1020; --bg-soft:#141830; --card:#1a1f3d; --card-hover:#222848; --line:#2a3055;
  --text:#eef1ff; --text-dim:#9aa3c7; --accent:#4fd8e8; --accent-2:#8b7cf6; --gold:#ffd166; --danger:#f06a8a;
  --radius:14px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{overflow-y:scroll;scrollbar-gutter:stable}
body{background:var(--bg);color:var(--text);font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;line-height:1.6}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
button{font-family:inherit;cursor:pointer}
.container{max-width:1200px;margin:0 auto;padding:0 20px}

/* 页头 */
header{position:sticky;top:0;z-index:50;background:rgba(13,16,32,.9);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;gap:20px;height:64px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:20px;letter-spacing:1px}
.logo img{width:38px;height:38px;border-radius:9px}
.logo small{display:block;font-size:10px;color:var(--text-dim);letter-spacing:2px;font-weight:400}
nav.main-nav{display:flex;gap:4px;margin-left:auto}
nav.main-nav .nav-item{position:relative;padding:8px 14px;border-radius:10px;font-size:14px;font-weight:600;cursor:pointer}
nav.main-nav .nav-item:hover{background:var(--card)}
.nav-item .dropdown{position:absolute;top:100%;left:0;min-width:150px;background:var(--card);border:1px solid var(--line);border-radius:12px;padding:8px;display:none;box-shadow:0 10px 30px rgba(0,0,0,.5)}
.nav-item:hover .dropdown{display:block}
.dropdown a{display:block;padding:7px 12px;border-radius:8px;font-size:13px;color:var(--text-dim);font-weight:400}
.dropdown a:hover{background:var(--bg-soft);color:var(--accent)}
.dropdown a.on{color:var(--accent);font-weight:700}

/* 面包屑 */
.crumb{padding:14px 0 0;color:var(--text-dim);font-size:13px}
.crumb a{color:var(--text-dim)}
.crumb a:hover{color:var(--accent)}
.crumb b{color:var(--accent);font-weight:600}

/* 页头标题 */
.page-head{padding:20px 0 14px}
.page-head h1{font-size:28px;font-weight:800;display:flex;align-items:center;gap:12px;letter-spacing:1px}
.page-head h1::before{content:"";width:6px;height:28px;border-radius:3px;background:linear-gradient(180deg,var(--accent),var(--accent-2))}
.page-head p{color:var(--text-dim);font-size:13px;margin-top:6px}

/* 提示条 */
.note-bar{margin:2px 0 16px;padding:10px 14px;border:1px solid rgba(255,209,102,.45);border-radius:12px;background:rgba(255,209,102,.07);font-size:12.5px;color:#e8dcb0;line-height:1.7}
.note-bar b{color:var(--gold)}

/* 兑换码清单 */
.code-list{display:flex;flex-direction:column;gap:10px;margin-bottom:30px}
.code-row{display:flex;align-items:center;gap:14px;background:var(--card);border:1px solid var(--line);border-radius:14px;padding:14px 18px;transition:.18s}
.code-row:hover{border-color:var(--accent-2);background:var(--card-hover)}
.code-check{display:flex;align-items:center;gap:12px;cursor:pointer;flex:0 0 auto;min-width:250px;user-select:none}
.code-check input[type="checkbox"]{width:18px;height:18px;accent-color:var(--accent);cursor:pointer;flex-shrink:0}
.code-check .code{font-family:Consolas,"Courier New",monospace;font-size:19px;font-weight:800;letter-spacing:.6px;color:var(--accent);transition:.18s;word-break:break-all}
.code-reward{flex:1;min-width:180px;font-size:13px;color:var(--text-dim);line-height:1.7}
.copy-btn{margin-left:auto;flex-shrink:0;font-size:12px;padding:5px 16px;border-radius:9px;border:1px solid rgba(79,216,232,.5);background:rgba(79,216,232,.12);color:var(--accent);font-weight:700;transition:.15s}
.copy-btn:hover{background:var(--accent);color:#0b0e1c}
.copy-btn.copied{background:var(--gold);border-color:var(--gold);color:#0b0e1c}
.code-row.done{border-color:rgba(124,134,168,.35);background:rgba(13,16,32,.35)}
.code-row.done:hover{border-color:rgba(124,134,168,.6)}
.code-row.done .code-check .code{text-decoration:line-through;text-decoration-thickness:2px;color:#7c86a8;opacity:.75}
.code-row.done .code-reward{opacity:.55}
.code-empty{text-align:center;color:var(--text-dim);font-size:14px;padding:60px 0}

@media(max-width:900px){
  .code-row{flex-wrap:wrap}
  .code-check{min-width:220px}
  .copy-btn{margin-left:0}
}
@media(max-width:767px){
  nav.main-nav{display:none}
  .code-row{padding:12px 14px}
  .code-check{width:100%;min-width:0}
  .code-check .code{font-size:15px;letter-spacing:.3px}
  .code-reward{width:100%;min-width:0;padding-left:30px}
}