/* ===== 设计令牌 ===== */
:root{
  --bg:#fff; --bg-sub:#f5f5f7; --bg-soft:#fafafa;
  --text:#1d1d1f; --text-sub:#6e6e73; --text-dim:#86868b;
  --line:#d2d2d7; --line-soft:#e8e8ed;
  --accent:#0071e3; --accent-weak:#e8f2fd;
  --ok:#0a7d3c; --warn-bg:#fff8e1; --warn-line:#f0ad4e;
  --radius:12px; --maxw:840px;
  --nav-h:48px;
}
html[data-theme="dark"]{
  --bg:#000; --bg-sub:#1d1d1f; --bg-soft:#111;
  --text:#f5f5f7; --text-sub:#a1a1a6; --text-dim:#86868b;
  --line:#38383c; --line-soft:#2d2d30;
  --accent:#2997ff; --accent-weak:#0a1a2c;
  --ok:#4cd964; --warn-bg:#2a2416; --warn-line:#f0ad4e;
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  background:var(--bg); color:var(--text);
  font-family:-apple-system,BlinkMacSystemFont,"SF Pro Text","Helvetica Neue","PingFang SC","Microsoft YaHei",sans-serif;
  font-size:16px; line-height:1.7; letter-spacing:-.01em;
  -webkit-font-smoothing:antialiased;
  padding-bottom:env(safe-area-inset-bottom);
  overflow-x:hidden;
}
body.menu-open{overflow:hidden;}
a{color:var(--accent);text-decoration:none;}
a:hover{text-decoration:underline;}
code{
  font-family:"SF Mono",ui-monospace,Menlo,Consolas,monospace;
  font-size:.88em; background:var(--bg-sub);
  padding:.12em .4em; border-radius:5px; word-break:break-all;
}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 clamp(16px,4vw,22px);}

/* ===== 顶栏 ===== */
.nav{
  position:sticky; top:0; z-index:200; height:var(--nav-h);
  display:flex; align-items:center;
  padding-top:env(safe-area-inset-top);
  background:var(--bg);
  border-bottom:.5px solid var(--line-soft);
}
html[data-theme="dark"] .nav{background:rgba(0,0,0,.72);}
.nav-in{
  max-width:var(--maxw); width:100%; margin:0 auto;
  padding:0 clamp(16px,4vw,22px);
  display:flex; align-items:center; justify-content:space-between; gap:12px;
}
.brand{font-size:14px;font-weight:600;color:var(--text);white-space:nowrap;}
.nav-right{display:flex;align-items:center;gap:6px;}

/* 主题按钮 */
.icon-btn{
  width:40px;height:40px;flex:0 0 40px;
  display:flex;align-items:center;justify-content:center;
  background:transparent;border:none;border-radius:50%;
  color:var(--text-sub);cursor:pointer;
}
.icon-btn:hover{background:var(--bg-sub);color:var(--text);}
.icon-btn svg{width:19px;height:19px;fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;}
#moonIcon{display:block;} #sunIcon{display:none;}
html[data-theme="dark"] #moonIcon{display:none;}
html[data-theme="dark"] #sunIcon{display:block;}

/* 汉堡 */
.burger{
  width:40px;height:40px;flex:0 0 40px;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;
  background:transparent;border:none;border-radius:50%;cursor:pointer;
}
.burger:hover{background:var(--bg-sub);}
.burger span{
  display:block;width:17px;height:1.5px;background:var(--text);
  border-radius:2px;transition:transform .28s,opacity .2s;
}
.burger[aria-expanded="true"] span:nth-child(1){transform:translateY(6.5px) rotate(45deg);}
.burger[aria-expanded="true"] span:nth-child(2){opacity:0;}
.burger[aria-expanded="true"] span:nth-child(3){transform:translateY(-6.5px) rotate(-45deg);}

/* 汉堡展开层 */
.menu{
  position:fixed; inset:0; z-index:190;
  background:var(--bg);
  padding:calc(var(--nav-h) + env(safe-area-inset-top) + 24px) clamp(20px,6vw,32px) 32px;
  display:none; overflow-y:auto;
}
.menu.open{display:block;}
.menu a{
  display:block; padding:14px 0;
  border-bottom:.5px solid var(--line-soft);
  color:var(--text); text-decoration:none;
  font-size:20px; font-weight:500; letter-spacing:-.02em;
}
.menu a:hover{text-decoration:none;color:var(--accent);}
.menu a small{
  display:block; font-size:11px; font-weight:400;
  color:var(--text-dim); letter-spacing:.06em;
  text-transform:uppercase; margin-top:2px;
}
.menu-note{margin-top:28px;font-size:12px;color:var(--text-dim);line-height:1.7;}

/* ===== Hero ===== */
.hero{padding:clamp(40px,8vw,72px) 0 clamp(28px,5vw,44px);}
.hero h1{
  font-size:clamp(30px,6vw,44px); font-weight:600;
  letter-spacing:-.025em; line-height:1.12; margin-bottom:12px;
}
.hero p{font-size:clamp(15px,2vw,17px);color:var(--text-sub);max-width:32em;}
.hero-actions{margin-top:22px;display:flex;gap:10px;flex-wrap:wrap;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  min-height:44px;padding:0 20px;border-radius:980px;
  background:var(--accent);color:#fff;font-size:14px;font-weight:500;
}
.btn:hover{text-decoration:none;opacity:.88;}
.btn-ghost{background:transparent;color:var(--accent);border:1px solid var(--accent);}

/* ===== 区块 ===== */
section{padding:clamp(30px,6vw,52px) 0;border-top:.5px solid var(--line-soft);}
h2{font-size:clamp(20px,3.2vw,26px);font-weight:600;letter-spacing:-.02em;line-height:1.25;margin-bottom:8px;}
h3{font-size:16px;font-weight:600;margin-bottom:6px;}
.lede{color:var(--text-sub);font-size:14px;margin-bottom:22px;}

.card{
  background:var(--bg-sub); border-radius:var(--radius);
  padding:clamp(16px,3vw,22px); margin-bottom:12px;
}
.card p{font-size:14px;color:var(--text-sub);}
.note{font-size:12.5px;color:var(--text-dim);margin-top:8px;line-height:1.65;}
.note b{color:var(--text-sub);font-weight:500;}
.tip{
  background:var(--warn-bg);border-left:3px solid var(--warn-line);
  padding:12px 16px;border-radius:8px;font-size:13.5px;
  color:var(--text-sub);margin:14px 0;line-height:1.7;
}

/* 两栏对照 */
.duo{display:grid;gap:12px;grid-template-columns:1fr;}
@media(min-width:700px){.duo{grid-template-columns:1fr 1fr;}}

/* 域名卡 */
.domains{display:grid;gap:12px;grid-template-columns:1fr;}
@media(min-width:760px){.domains{grid-template-columns:repeat(3,1fr);}}
.dcard{
  background:var(--bg-sub);border-radius:var(--radius);
  padding:18px;display:flex;flex-direction:column;gap:8px;
}
.dcard .sfx{font-size:16px;font-weight:600;word-break:break-all;}
.dcard .dsc{font-size:13px;color:var(--text-sub);flex:1;}
.dcard .meta{font-size:11.5px;color:var(--text-dim);display:flex;flex-wrap:wrap;gap:10px;}
.pill{
  display:inline-block;padding:2px 9px;border-radius:980px;
  font-size:11px;font-weight:500;
}
.pill-open{background:var(--accent-weak);color:var(--accent);}
.pill-wait{background:var(--bg-soft);color:var(--text-dim);border:.5px solid var(--line);}

/* 表格（手机转卡片） */
.tscroll{overflow-x:auto;-webkit-overflow-scrolling:touch;}
table{width:100%;border-collapse:collapse;font-size:14px;min-width:480px;}
th{
  text-align:left;font-weight:600;color:var(--text-dim);
  font-size:11px;letter-spacing:.04em;text-transform:uppercase;
  padding:9px 14px 9px 0;border-bottom:.5px solid var(--line);white-space:nowrap;
}
td{padding:12px 14px 12px 0;border-bottom:.5px solid var(--line-soft);vertical-align:top;color:var(--text-sub);}
tr:last-child td{border-bottom:none;}
td b{color:var(--text);font-weight:600;}
.yes{color:var(--ok);font-weight:500;}
.no{color:var(--text-dim);}

@media(max-width:640px){
  .tscroll{overflow:visible;}
  table,tbody,tr,td{display:block;width:100%;min-width:0;}
  thead{display:none;}
  tr{
    background:var(--bg-sub);border-radius:10px;
    padding:14px 16px;margin-bottom:10px;
  }
  td{
    padding:4px 0;border:none;
    display:flex;gap:12px;align-items:baseline;
  }
  td::before{
    content:attr(data-l);
    flex:0 0 76px;color:var(--text-dim);font-size:11.5px;
  }
}

/* 保留词墙 */
.tags{display:flex;flex-wrap:wrap;gap:6px;margin:10px 0 4px;}
.tag{
  font-family:"SF Mono",ui-monospace,monospace;
  font-size:12px;background:var(--bg-soft);
  border:.5px solid var(--line);border-radius:6px;
  padding:3px 8px;color:var(--text-sub);
}

/* ===== 表单 ===== */
.form{max-width:560px;}
.field{margin-bottom:16px;}
.field label{
  display:block;font-size:13px;font-weight:500;
  margin-bottom:6px;color:var(--text);
}
.field label .req{color:var(--accent);}
.field input,.field select,.field textarea{
  width:100%;font-family:inherit;font-size:15px;
  padding:11px 13px;border-radius:10px;
  border:1px solid var(--line);background:var(--bg);color:var(--text);
  min-height:44px;
}
.field textarea{min-height:88px;resize:vertical;line-height:1.6;}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--accent);
  box-shadow:0 0 0 3px var(--accent-weak);
}
.hint{font-size:12px;color:var(--text-dim);margin-top:5px;line-height:1.6;}
.row2{display:grid;gap:0 12px;grid-template-columns:1fr;}
@media(min-width:560px){.row2{grid-template-columns:1fr 1fr;}}
.btn-submit{
  width:100%;min-height:46px;border:none;border-radius:10px;
  background:var(--accent);color:#fff;font-size:15px;font-weight:500;
  font-family:inherit;cursor:pointer;
}
.btn-submit:hover{opacity:.9;}
@media(min-width:560px){.btn-submit{width:auto;padding:0 28px;}}

/* 错误提示 */
.err{
  background:#fdecea;border-left:3px solid #d93025;
  padding:12px 16px;border-radius:8px;margin-bottom:16px;font-size:14px;color:#7a1c12;
}
html[data-theme="dark"] .err{background:#2a1614;color:#f5a69a;}
.ok-box{
  background:var(--accent-weak);border-radius:var(--radius);
  padding:20px;margin-bottom:16px;
}
.ok-box h3{color:var(--accent);}
.ok-box p{font-size:14px;color:var(--text-sub);}

/* 邮件预览 */
.mail{
  background:var(--bg-sub);border:.5px solid var(--line-soft);
  border-radius:var(--radius);padding:16px 18px;
  font-family:"SF Mono",ui-monospace,monospace;
  font-size:12.5px;line-height:1.85;
  white-space:pre-wrap;word-break:break-word;
  max-height:320px;overflow:auto;color:var(--text);
}
.copy-bar{margin-top:10px;}

/* ===== FAQ ===== */
details{border-bottom:.5px solid var(--line-soft);}
summary{
  padding:15px 0;font-size:15px;font-weight:500;cursor:pointer;
  list-style:none;display:flex;justify-content:space-between;
  align-items:center;gap:14px;min-height:44px;
}
summary::-webkit-details-marker{display:none;}
summary::after{content:"+";color:var(--text-dim);font-size:19px;font-weight:300;flex:0 0 auto;}
details[open] summary::after{content:"−";}
details p{font-size:14px;color:var(--text-sub);padding:0 0 15px;}

/* ===== 页脚 ===== */
footer{
  border-top:.5px solid var(--line-soft);
  padding:28px 0 44px;font-size:12px;color:var(--text-dim);line-height:1.8;
}

/* ===== 无障碍 ===== */
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *{transition:none!important;animation:none!important;}
}

/* ===== 申请通道 ===== */
.chan{
  background:var(--bg-sub);
  border-radius:var(--r);
  padding:clamp(16px,3vw,20px);
  margin-bottom:12px;
}
.chan-h{
  display:flex;align-items:center;gap:10px;
  flex-wrap:wrap;margin-bottom:6px;
}
.chan-h code{font-size:15px;background:none;padding:0;}
.chan-d{font-size:13.5px;color:var(--text-sub);margin-bottom:4px;}
.chan-r{font-size:12.5px;color:var(--text-dim);}
.chan-r::before{content:"要求 · ";color:var(--accent);font-weight:500;}

/* ===== 警示卡 ===== */
.card-warn{
  background:var(--bg-sub);
  border-left:3px solid #d93025;
}
.card-warn h3{color:var(--text);}

/* ===== 页脚小字 ===== */
.foot-note{
  margin-top:6px;
  padding-top:6px;
  border-top:.5px solid var(--line-soft);
  color:var(--text-dim);
}

/* ===== 唯一官网区块 ===== */
.card-official{
  border-left:3px solid var(--accent);
  background:var(--bg-sub);
}
.official-url{
  display:inline-block;
  font-family:"SF Mono",ui-monospace,"Courier New",monospace;
  font-size:clamp(14px,2.4vw,18px);
  font-weight:600;
  color:var(--accent);
  word-break:break-all;
  margin-bottom:10px;
}
.official-url:hover{text-decoration:underline;}
.official-notice{
  font-size:var(--fz-sm);
  color:var(--text);
  font-weight:500;
  margin-bottom:6px;
}

/* ===== 友链卡片 ===== */
.link-grid{display:grid;gap:12px;grid-template-columns:1fr;}
@media(min-width:720px){.link-grid{grid-template-columns:1fr 1fr;}}
.link-card{
  background:var(--bg-sub);border-radius:var(--radius);
  padding:clamp(16px,3vw,22px);
  display:flex;flex-direction:column;gap:7px;
}
.link-h{display:flex;align-items:baseline;gap:8px;flex-wrap:wrap;}
.link-name{font-size:16px;font-weight:600;letter-spacing:-.01em;}
.link-url{
  font-family:"SF Mono",ui-monospace,Menlo,Consolas,monospace;
  font-size:13px;color:var(--accent);word-break:break-all;
}
.link-desc{font-size:var(--fz-sm);color:var(--text-sub);}
.link-meta{
  margin-top:2px;display:flex;gap:6px;flex-wrap:wrap;align-items:center;
}
.link-tag{
  display:inline-block;padding:2px 9px;border-radius:980px;
  font-size:11px;background:var(--bg-soft);color:var(--text-dim);
  border:.5px solid var(--line);
}
.link-rel{background:var(--accent-weak);color:var(--accent);border-color:transparent;}
.link-list{list-style:none;}
.link-list li{
  font-size:var(--fz-sm);color:var(--text-sub);
  padding:5px 0 5px 14px;position:relative;
}
.link-list li::before{
  content:"·";position:absolute;left:0;color:var(--text-dim);
}

/* ===== 页脚官网行 ===== */
.foot-official{
  font-size:var(--fz-sm);
  color:var(--text);
  margin-bottom:8px;
  padding-bottom:8px;
  border-bottom:.5px solid var(--line-soft);
}
.foot-official a{
  font-family:"SF Mono",ui-monospace,"Courier New",monospace;
  font-weight:600;
}
.foot-fake{color:#d93025;}

/* 页脚分区：左标签 + 右内容，手机上自动换行 */
.foot-block{
  display:flex;align-items:baseline;gap:10px;
  flex-wrap:wrap;padding:4px 0;font-size:12px;
}
.foot-k{flex:0 0 auto;min-width:56px;color:var(--text-dim);}
.foot-v{flex:1 1 240px;min-width:0;color:var(--text-sub);word-break:break-word;}
.foot-v b{color:var(--text);font-family:"SF Mono",ui-monospace,"Courier New",monospace;}
.foot-c{
  margin-top:14px;padding-top:10px;
  border-top:.5px solid var(--line-soft);
}

/* ===== 菜单分组 ===== */
.menu-group{margin-bottom:6px;}
.menu-gtitle{
  font-size:11px;color:var(--text-dim);
  letter-spacing:.06em;text-transform:uppercase;
  padding:14px 0 4px;
}

/* ===== 状态标签补充色 ===== */
.pill-info{background:var(--accent-weak);color:var(--accent);}
.pill-ok{background:#e6f6ec;color:var(--ok);}
.pill-warn{background:var(--warn-bg);color:#8a6100;border:.5px solid var(--warn-line);}
.pill-pin{background:none;color:var(--accent);border:.5px solid var(--accent);}
html[data-theme="dark"] .pill-ok{background:#0f2a19;}
html[data-theme="dark"] .pill-warn{color:#f0ad4e;}

/* ===== 首页最新公告条 ===== */
.latest{
  background:var(--bg-sub);border-radius:var(--radius);
  padding:16px 20px;margin-bottom:8px;
  border-left:3px solid var(--accent);
}
.latest-h{display:flex;align-items:center;gap:8px;flex-wrap:wrap;}
.latest-date{font-size:12px;color:var(--text-dim);}
.latest-more{margin-left:auto;font-size:12.5px;}
.latest-t{font-size:15px;font-weight:600;margin-top:8px;}
.latest-b{font-size:13.5px;color:var(--text-sub);margin-top:4px;}

/* ===== 服务状态 ===== */
.st-list{margin-bottom:6px;}
.st-item{
  display:flex;align-items:baseline;gap:10px;flex-wrap:wrap;
  padding:11px 0;border-bottom:.5px solid var(--line-soft);
  font-size:14px;
}
.st-item:last-child{border-bottom:none;}
.dot{width:8px;height:8px;border-radius:50%;flex:0 0 auto;align-self:center;}
.dot-ok{background:var(--ok);}
.dot-slow{background:var(--warn-line);}
.dot-down{background:#d93025;}
.st-name{font-weight:500;flex:0 0 auto;}
.st-state{
  font-size:11.5px;color:var(--text-dim);
  border:.5px solid var(--line);border-radius:4px;padding:0 6px;flex:0 0 auto;
}
.st-desc{flex:1 1 200px;min-width:0;font-size:13px;color:var(--text-sub);}

/* ===== 公告条目 ===== */
.ann{
  padding:16px 0;border-bottom:.5px solid var(--line-soft);
}
.ann:last-of-type{border-bottom:none;}
.ann-h{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-bottom:6px;}
.ann-date{font-size:12px;color:var(--text-dim);margin-left:auto;}
.ann-title{font-size:15.5px;font-weight:600;margin-bottom:5px;letter-spacing:-.01em;}
.ann-body{font-size:13.5px;color:var(--text-sub);}
.ann-warn{
  background:var(--warn-bg);
  border-left:3px solid var(--warn-line);
  padding:14px 16px;border-radius:8px;
  margin-bottom:10px;border-bottom:none;
}
.ann-warn .ann-body{color:var(--text);}

/* ===== 条款章节 ===== */
.term-sec{padding:16px 0;border-bottom:.5px solid var(--line-soft);}
.term-sec:last-child{border-bottom:none;}
.term-sec h3{font-size:15px;font-weight:600;margin-bottom:8px;}
.term-sec p{font-size:14px;color:var(--text-sub);margin-bottom:7px;}
.term-sec p:last-child{margin-bottom:0;}