/* 宽带套餐指南 — 最小全站样式（移动优先，零外部依赖） */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;line-height:1.75;color:#1f2430;background:#f5f7fb;
}
img{max-width:100%;height:auto}
a{color:#1456c8;text-underline-offset:3px}
a:hover{text-decoration:none}
h1,h2,h3{line-height:1.35;color:#10182b;margin:1.4em 0 .5em}
h1{font-size:1.6rem;margin-top:0}
h2{font-size:1.28rem}
h3{font-size:1.08rem}
p{margin:.6em 0}
ul,ol{padding-left:1.4em}
li{margin:.3em 0}
time{color:#5a6478}

.skip-link{position:absolute;left:-999px;top:0;background:#1456c8;color:#fff;padding:8px 14px;z-index:100}
.skip-link:focus{left:8px;top:8px}

/* 头部 */
.site-header{
  background:#fff;border-bottom:1px solid #e3e8f2;
  display:flex;flex-wrap:wrap;align-items:center;gap:12px;
  padding:10px 16px;position:sticky;top:0;z-index:50;
}
.site-logo{display:flex;align-items:center;gap:8px;text-decoration:none;color:#10182b;font-weight:700}
.site-logo img{width:34px;height:34px;flex:none}
.site-name{font-size:1.12rem;white-space:nowrap}
.site-nav{margin-left:auto}
.site-nav ul{display:flex;flex-wrap:wrap;gap:4px 18px;list-style:none;margin:0;padding:0}
.site-nav a{text-decoration:none;color:#3a4358;font-size:.95rem;padding:4px 2px}
.site-nav a[aria-current="page"]{color:#1456c8;font-weight:700;border-bottom:2px solid #1456c8}
.site-search{display:flex;align-items:center;gap:6px;flex:none}
.site-search input[type="search"]{
  width:150px;padding:7px 10px;border:1px solid #c9d4ea;border-radius:8px;
  font-size:.92rem;font-family:inherit;background:#fff;color:#1f2430;
}
.site-search button{
  padding:7px 16px;border:0;border-radius:8px;background:#1456c8;color:#fff;
  font-size:.92rem;font-family:inherit;font-weight:700;cursor:pointer;
}
.site-search button:hover{background:#0f46a6}
.visually-hidden{
  position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;
  clip:rect(0 0 0 0);white-space:nowrap;border:0;
}
/* 详情页封面图链接 */
.main-image-link{display:block;border-radius:10px;line-height:0}
.main-image-link img{border-radius:10px;transition:opacity .15s}
.main-image-link:hover img{opacity:.9}
@media (max-width:719px){
  /* 第一行：站名在左、搜索在右；第二行：导航 */
  .site-nav{order:3;width:100%;margin-left:0}
  .site-search{order:2;margin-left:auto;gap:4px}
  .site-name{font-size:1rem}
  .site-search input[type="search"]{width:150px;padding:6px 8px}
  .site-search button{padding:6px 10px;font-size:.85rem}
}

main{max-width:860px;margin:0 auto;padding:20px 16px 48px}
.hero{background:#fff;border:1px solid #e3e8f2;border-radius:12px;padding:24px 20px;margin-bottom:20px}
.hero h1{margin-bottom:.3em}
.lead{font-size:1.05rem;color:#39415a}

section,aside,.detail,.article,.page-body{
  background:#fff;border:1px solid #e3e8f2;border-radius:12px;
  padding:18px 20px;margin:18px 0;
}
aside{background:#f9fbff}

/* 面包屑 */
.breadcrumb{font-size:.88rem;color:#5a6478;margin:0 0 14px}
.breadcrumb ol{list-style:none;display:flex;flex-wrap:wrap;margin:0;padding:0;gap:4px}
.breadcrumb li::after{content:"›";margin-left:6px;color:#9aa4b8}
.breadcrumb li:last-child::after{content:""}

/* 卡片列表 */
.card-list{list-style:none;padding:0;margin:0;display:grid;gap:14px;grid-template-columns:1fr}
.card-list>li,.item-list>li{background:#f9fbff;border:1px solid #e3e8f2;border-radius:10px;padding:14px 16px}
.card-list h3,.item-list h3{margin:.1em 0 .4em}
.item-list{padding-left:0;list-style:none;counter-reset:item}
.item-list>li{position:relative}
.item-list article{margin:0}
.item-list dl{display:grid;grid-template-columns:max-content 1fr;gap:2px 14px;margin:.5em 0;font-size:.94rem}
.item-list dt{color:#5a6478}
.item-list dt::after{content:"："}
.item-list dd{margin:0}

/* 分页 */
.pagination{margin-top:20px}
.pagination ul{list-style:none;display:flex;flex-wrap:wrap;gap:6px;padding:0;margin:0}
.pagination a,.pagination span[aria-current]{
  display:inline-block;min-width:38px;text-align:center;padding:6px 10px;
  border:1px solid #c9d4ea;border-radius:8px;text-decoration:none;background:#fff;
}
.pagination span[aria-current]{background:#1456c8;color:#fff;border-color:#1456c8;font-weight:700}

/* 定义列表与表格 */
.facts{display:grid;grid-template-columns:max-content 1fr;gap:6px 16px;margin:.8em 0}
.facts dt{color:#5a6478;font-weight:600}
.facts dd{margin:0}
.table-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch;border:1px solid #e3e8f2;border-radius:8px;margin:.8em 0}
table{border-collapse:collapse;width:100%;min-width:480px;font-size:.94rem}
caption{text-align:left;color:#5a6478;font-size:.86rem;padding:8px 10px;background:#f5f7fb}
th,td{padding:8px 10px;border-bottom:1px solid #e3e8f2;text-align:left;vertical-align:top}
thead th{background:#eef3fc}

/* 详情页 */
.detail header .summary{font-size:1.05rem}
.meta{font-size:.9rem;color:#5a6478}
.main-image{margin:1em 0}
.main-image img{width:100%;border-radius:10px;border:1px solid #e3e8f2;background:#f5f7fb}
figcaption{color:#5a6478;font-size:.86rem;margin-top:6px}
.proscons{display:grid;gap:8px}
.note-list li{margin:.45em 0}

/* 按钮与声明 */
.btn{
  display:inline-block;background:#1456c8;color:#fff!important;padding:12px 22px;border-radius:10px;
  text-decoration:none;font-weight:700;font-size:1.05rem;margin:8px 0;
}
.btn:hover{background:#0f46a6}
.disclosure{font-size:.85rem;color:#7a8499;background:#f5f7fb;border-radius:8px;padding:8px 12px}
.buy-box{border-left:4px solid #1456c8}

/* 停售保留页提示 */
.delist-notice{border-left:4px solid #c8741a;background:#fff8ef}
.delist-box{border-left-color:#c8741a}

/* 目录 */
.toc{background:#f9fbff;border:1px dashed #c9d4ea;border-radius:8px;padding:10px 18px;margin:14px 0;font-size:.94rem}
.byline{color:#5a6478;font-size:.92rem}
.byline span{margin-right:14px;white-space:nowrap}

/* FAQ */
.faq-item{border-bottom:1px solid #eef1f7;padding:8px 0}
.faq-item:last-child{border-bottom:0}

/* 页脚 */
.site-footer{background:#10182b;color:#c6cede;padding:26px 16px;margin-top:30px;font-size:.92rem}
.site-footer a{color:#dbe4f5}
.site-footer nav ul{list-style:none;display:flex;flex-wrap:wrap;gap:6px 20px;padding:0;margin:0 0 10px}
.site-footer .disclosure{background:transparent;color:#9aa4b8;padding:0;max-width:860px}
.site-footer p{max-width:860px;margin:.5em auto}
.site-footer nav{max-width:860px;margin:0 auto}
.site-footer .friend-links{margin-top:10px}
.site-footer .friend-links ul{margin-bottom:0;font-size:.88rem}
.site-footer .friend-links a{color:#9aa4b8}
.site-footer .beian a{margin-right:16px}

@media (min-width:720px){
  .card-list.cols-2{grid-template-columns:1fr 1fr}
  h1{font-size:1.9rem}
  /* PC 端头部内容整组居中，不左右分散 */
  .site-header{justify-content:center}
  .site-nav{margin-left:0}
}