/* ==========================================================
   号易官网 · 2026 编辑式排版系统 v3
   纸感暖白 × 墨黑 × 砖红 · 细线分区 + 大字号衬线标题
   —— 与旧版（深空蓝玻璃拟态）完全区隔
   ========================================================== */

:root{
  /* 墨色阶 */
  --ink:#14120F;
  --ink-2:#2A2620;
  --body:#3B362E;
  --muted:#6E675C;
  --faint:#A2988A;

  /* 唯一强调色：砖红 */
  --accent:#B23A2E;
  --accent-d:#8E2C23;
  --accent-l:#D2584A;

  /* 辅助色：墨绿（仅用于数据条与勾选） */
  --pine:#1F4B43;

  /* 纸张 */
  --paper:#FAF7F1;
  --paper-2:#FFFFFF;
  --paper-3:#F2ECE1;

  --line:#DDD5C6;
  --line-2:#EAE3D6;

  --serif:"Noto Serif SC","Source Han Serif SC","Songti SC","SimSun",Georgia,serif;
  --sans:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --mono:"SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;

  --wrap:1180px;
  --nav-h:66px;
}

*{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  background:var(--paper);color:var(--body);
  font-family:var(--sans);
  font-size:15.5px;line-height:1.8;-webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
a{text-decoration:none;color:inherit}
img{max-width:100%;display:block}
em{font-style:normal}
button{font:inherit;cursor:pointer;border:0;background:none;color:inherit}
input,select{font:inherit}
::selection{background:rgba(178,58,46,.16)}

.wrap{width:min(var(--wrap),calc(100% - 48px));margin-inline:auto}
@media(min-width:1460px){.wrap{width:min(1280px,calc(100% - 100px))}}

h1,h2,h3,h4{color:var(--ink);font-weight:700;line-height:1.28;letter-spacing:0}
h1,h2{font-family:var(--serif);font-weight:600;letter-spacing:.01em}
h1{font-size:clamp(30px,4.6vw,56px);line-height:1.18}
h2{font-size:clamp(23px,2.9vw,36px);line-height:1.24}
h3{font-size:17px;font-weight:700}
p{color:var(--body)}

/* ---------------- 按钮 ---------------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  height:46px;padding:0 22px;border-radius:3px;font-weight:700;font-size:14px;
  letter-spacing:.02em;white-space:nowrap;
  transition:background .18s ease,color .18s ease,border-color .18s ease,transform .18s ease;
}
.btn:hover{transform:translateY(-1px)}
.btn-main{background:var(--accent);color:#fff}
.btn-main:hover{background:var(--accent-d)}
.btn-ghost{background:transparent;color:var(--ink);border:1px solid var(--ink)}
.btn-ghost:hover{background:var(--ink);color:var(--paper)}
.btn-dark{background:var(--ink);color:var(--paper)}
.btn-dark:hover{background:var(--ink-2)}
.btn-lg{height:54px;padding:0 30px;font-size:15px}
.btn-sm{height:36px;padding:0 15px;font-size:13px}
.btn-ghost-light{background:transparent;color:var(--paper);border:1px solid rgba(250,247,241,.42)}
.btn-ghost-light:hover{background:rgba(250,247,241,.12);border-color:rgba(250,247,241,.72)}

/* ---------------- 顶部条 ---------------- */
.topbar{background:var(--paper-3);color:var(--muted);font-size:12px;border-bottom:1px solid var(--line)}
.topbar .wrap{display:flex;align-items:center;justify-content:space-between;gap:14px;height:33px}
.topbar .tb-l{display:inline-flex;align-items:center;gap:9px;min-width:0;letter-spacing:.01em}
.topbar .dot{width:5px;height:5px;background:var(--accent);flex:none}
.topbar .tb-r{display:inline-flex;align-items:center;gap:9px;white-space:nowrap}
.topbar a{color:var(--ink-2)}
.topbar a:hover{color:var(--accent)}
.topbar b{color:var(--ink);font-weight:700;font-family:var(--mono);letter-spacing:.06em}
.topbar .sep{color:var(--faint)}

/* ---------------- 导航 ---------------- */
header.site{
  position:sticky;top:0;z-index:300;background:rgba(250,247,241,.96);
  border-bottom:1px solid var(--line);
}
.nav{height:var(--nav-h);display:flex;align-items:center;gap:22px}
.brand{display:flex;align-items:center;gap:11px;flex:none;margin-right:8px}
.logo-mark{width:36px;height:36px;flex:none;object-fit:cover;border-radius:2px}
.brand-txt{display:flex;flex-direction:column;line-height:1.2}
.brand-txt b{font-size:17px;font-weight:800;color:var(--ink);letter-spacing:.02em}
.brand-txt small{font-size:10.5px;color:var(--faint);letter-spacing:.14em;text-transform:uppercase;font-weight:600}

.navlinks{display:flex;align-items:center;gap:0;margin-left:auto}
.navlinks a{
  position:relative;padding:9px 13px;font-size:14px;font-weight:600;color:var(--ink-2);
  transition:color .16s ease;
}
.navlinks a::after{
  content:"";position:absolute;left:13px;right:13px;bottom:2px;height:1px;background:var(--accent);
  transform:scaleX(0);transform-origin:left;transition:transform .2s ease;
}
.navlinks a:hover{color:var(--accent)}
.navlinks a:hover::after,.navlinks a.on::after{transform:scaleX(1)}
.navlinks a.on{color:var(--accent)}
.nav-actions{display:flex;align-items:center;gap:14px;flex:none;padding-left:6px;border-left:1px solid var(--line)}
.nav-link{font-size:13px;font-weight:600;color:var(--ink-2)}
.nav-link:hover{color:var(--accent)}
.menu-btn{
  display:none;width:40px;height:40px;border:1px solid var(--ink);background:none;
  font-size:17px;line-height:1;color:var(--ink);align-items:center;justify-content:center;
}

/* ---------------- HERO ---------------- */
.hero{
  position:relative;overflow:hidden;background:var(--paper);
  padding:78px 0 84px;border-bottom:1px solid var(--line);
}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(90deg,rgba(20,18,15,.045) 1px,transparent 1px);
  background-size:calc(100% / 6) 100%;
  mask-image:linear-gradient(#000,transparent 88%);
  -webkit-mask-image:linear-gradient(#000,transparent 88%);
}
.hero .wrap{position:relative;z-index:2}
.hero-inner{display:grid;grid-template-columns:1.18fr .82fr;gap:64px;align-items:start}
.hero-tag{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--mono);font-size:11.5px;font-weight:600;letter-spacing:.10em;
  color:var(--muted);text-transform:uppercase;padding-bottom:12px;
  border-bottom:1px solid var(--line);
}
.hero-tag i{width:22px;height:1px;background:var(--accent);flex:none}
.hero h1{color:var(--ink);margin:22px 0 18px}
.hero h1 em{color:var(--accent);border-bottom:2px solid var(--accent);padding-bottom:2px}
.hero .lead{color:var(--body);font-size:16px;max-width:600px;line-height:1.95}
.hero-actions{display:flex;gap:12px;margin-top:32px;flex-wrap:wrap}
.hero-nums{
  display:flex;gap:0;margin-top:40px;flex-wrap:wrap;
  border-top:1px solid var(--line);padding-top:22px;
}
.hero-nums div{display:flex;flex-direction:column;gap:3px;padding-right:34px;margin-right:34px;border-right:1px solid var(--line)}
.hero-nums div:last-child{border-right:0;margin-right:0;padding-right:0}
.hero-nums b{font-family:var(--serif);font-size:27px;font-weight:600;color:var(--ink);line-height:1.1}
.hero-nums span{font-size:12px;color:var(--muted);letter-spacing:.02em}

/* 邀请码面板（取代玻璃卡） */
.invite-card{
  position:relative;background:var(--ink);color:var(--paper);
  padding:30px 28px 26px;border-radius:2px;
}
.invite-card::before{
  content:"";position:absolute;left:0;top:0;width:46px;height:3px;background:var(--accent);
}
.ic-top{
  display:flex;align-items:center;justify-content:space-between;
  font-family:var(--mono);font-size:10.5px;letter-spacing:.16em;color:#8E8578;text-transform:uppercase;
}
.ic-code{
  margin:18px 0 8px;font-family:var(--mono);font-size:44px;font-weight:700;
  letter-spacing:.10em;color:var(--paper);line-height:1.1;font-variant-numeric:tabular-nums;
}
.ic-hint{font-size:12px;color:#8E8578;margin-bottom:22px;letter-spacing:.02em}
.ic-btn{
  display:flex;align-items:center;justify-content:center;gap:8px;height:48px;
  background:var(--accent);color:#fff;font-weight:700;font-size:14px;border-radius:2px;
  transition:background .18s ease;
}
.ic-btn:hover{background:var(--accent-l)}
.ic-list{margin-top:22px;display:grid;gap:9px;border-top:1px solid rgba(250,247,241,.14);padding-top:18px}
.ic-list div{display:flex;align-items:flex-start;gap:9px;font-size:12.5px;color:#BCB3A5;line-height:1.65}
.ic-list i{
  flex:none;width:14px;height:14px;margin-top:5px;font-style:normal;
  color:var(--accent-l);font-size:11px;font-weight:800;display:flex;align-items:center;justify-content:center;
}

/* ---------------- 通用区块 ---------------- */
.section{padding:84px 0}
.section.tight{padding:56px 0}
.section.alt{background:var(--paper-2)}
.section.alt,.section.dark{border-block:1px solid var(--line)}
.section.dark{background:var(--ink);color:#BDB4A6}
.section.dark h2,.section.dark h3,.section.dark .head h2{color:var(--paper)}
.section.dark p{color:#A79E90}

.head{max-width:760px;margin-bottom:46px}
.head.center{margin-inline:auto;text-align:center}
.kicker{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--mono);font-size:11px;font-weight:600;letter-spacing:.16em;
  color:var(--muted);text-transform:uppercase;margin-bottom:14px;
}
.kicker::before{content:"";width:18px;height:1px;background:var(--accent)}
.head h2 em{color:var(--accent)}
.head p{margin-top:14px;color:var(--muted);font-size:15px;line-height:1.9}
.section.dark .kicker{color:#8E8578}

/* ---------------- 特性（细线列表，非卡片） ---------------- */
.feat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border-top:1px solid var(--line)}
.feat{
  position:relative;padding:30px 30px 30px 0;border-bottom:1px solid var(--line);
}
.feat:not(:nth-child(3n)){border-right:1px solid var(--line);padding-right:30px}
.feat:nth-child(3n+1),.feat:nth-child(3n+2){padding-right:30px}
.feat:nth-child(3n){padding-right:0}
.feat:not(:nth-child(3n+1)){padding-left:30px}
.feat::after{
  content:"";position:absolute;left:0;bottom:-1px;height:1px;width:0;background:var(--accent);
  transition:width .32s ease;
}
.feat:hover::after{width:100%}
.fi{
  width:40px;height:40px;display:flex;align-items:center;justify-content:center;
  border:1px solid var(--line);color:var(--accent);margin-bottom:18px;background:var(--paper-2);
}
.fi svg{width:21px;height:21px}
.feat h3{margin-bottom:9px;font-size:16.5px}
.feat p{font-size:13.5px;color:var(--muted);line-height:1.85}
.section.alt .fi{background:var(--paper)}

/* ---------------- 筛选 ---------------- */
.filters{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin-bottom:28px}
.chip{
  height:36px;padding:0 15px;border:1px solid var(--line);background:transparent;
  font-size:13px;font-weight:600;color:var(--ink-2);display:inline-flex;align-items:center;gap:7px;
  border-radius:2px;transition:all .16s ease;
}
.chip:hover{border-color:var(--ink);color:var(--ink)}
.chip.on{background:var(--ink);border-color:var(--ink);color:var(--paper)}
.chip span{font-family:var(--mono);font-size:11px;opacity:.62}
.chip.on span{opacity:.8}
.search-box{
  margin-left:auto;display:flex;align-items:center;gap:9px;height:36px;padding:0 13px;
  border:1px solid var(--line);background:var(--paper-2);min-width:240px;border-radius:2px;
}
.search-box:focus-within{border-color:var(--ink)}
.search-box svg{width:14px;height:14px;color:var(--faint);flex:none}
.search-box input{border:0;outline:0;background:none;width:100%;font-size:13.5px;color:var(--ink)}
.search-box input::placeholder{color:var(--faint)}

/* ---------------- 套餐卡（内页仍在用） ---------------- */
.plan-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
.plan{
  position:relative;background:var(--paper-2);padding:22px 20px 20px;
  display:flex;flex-direction:column;
  transition:background .18s ease;
}
.plan:hover{background:var(--paper)}
.plan.hot{background:#FFFDF9}
.plan.hot::before{content:"";position:absolute;left:0;top:0;width:100%;height:2px;background:var(--accent)}
.plan-top{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-bottom:14px}
.op-badge{
  display:inline-flex;align-items:center;height:21px;padding:0 7px;border:1px solid currentColor;
  font-size:10.5px;font-weight:700;letter-spacing:.06em;
}
.op-移动{color:#1B5FA8}
.op-联通{color:#A32B2B}
.op-电信{color:#0A6E8E}
.op-广电{color:#6B3FA0}
.op-其他{color:#5B6470}
.plan-flag{
  font-family:var(--mono);font-size:9.5px;font-weight:700;letter-spacing:.10em;
  padding:2px 6px;background:var(--accent);color:#fff;
}
.plan h3{font-size:16px;margin-bottom:12px;line-height:1.35;font-family:var(--serif);font-weight:600}
.plan-flow{display:flex;align-items:baseline;gap:5px;margin-bottom:4px}
.plan-flow b{font-family:var(--serif);font-size:27px;font-weight:600;color:var(--ink);line-height:1.1}
.plan-flow span{font-size:12px;color:var(--muted)}
.plan-price{font-size:12.5px;color:var(--accent);font-weight:700;margin-bottom:16px}
.plan-price b{font-family:var(--mono);font-size:15px}
.plan-specs{display:grid;gap:7px;padding-top:14px;border-top:1px solid var(--line-2);margin-bottom:16px}
.plan-specs div{display:flex;justify-content:space-between;gap:8px;font-size:12px;color:var(--muted)}
.plan-specs b{color:var(--ink-2);font-weight:600;text-align:right}
.plan-go{
  margin-top:auto;display:flex;align-items:center;justify-content:space-between;
  height:38px;padding:0 12px;border:1px solid var(--line);color:var(--ink);
  font-size:13px;font-weight:600;transition:all .16s ease;
}
.plan:hover .plan-go{background:var(--ink);border-color:var(--ink);color:var(--paper)}
.empty-tip{padding:60px 20px;text-align:center;color:var(--muted);font-size:14px;display:none}
.empty-tip.show{display:block}

/* ---------------- 首页紧凑变体 ---------------- */
.hero.hero-sm{padding:62px 0 68px}
.hero-sm h1{margin:20px 0 15px}
.hero-sm .lead{font-size:15.5px;max-width:540px}
.hero-sm .hero-actions{margin-top:28px}
.hero-sm .hero-nums{margin-top:32px}
.cta.cta-sm{padding:46px 44px}
.cta-sm h2{margin-bottom:10px}
.cta-sm .cta-actions{margin-top:22px}

/* ---------------- 首页流程条 ---------------- */
.flow-strip{display:grid;grid-template-columns:repeat(5,1fr);gap:0;border:1px solid var(--line)}
.fs-item{position:relative;display:flex;flex-direction:column;gap:6px;padding:24px 20px}
.fs-item+.fs-item{border-left:1px solid var(--line)}
.fs-n{
  font-style:normal;font-family:var(--mono);font-size:11px;font-weight:700;color:var(--accent);
  letter-spacing:.08em;margin-bottom:4px;
}
.fs-item b{font-size:14px;color:var(--ink);font-weight:700}
.fs-item span{font-size:12.5px;color:var(--muted);line-height:1.65}

/* ---------------- 步骤 ---------------- */
.steps{display:grid;grid-template-columns:repeat(5,1fr);gap:0;border-top:1px solid rgba(250,247,241,.18)}
.step{position:relative;padding:26px 22px 4px 0;border-right:1px solid rgba(250,247,241,.12)}
.step:last-child{border-right:0;padding-right:0}
.step-n{
  font-family:var(--mono);font-size:12px;font-weight:700;color:var(--accent-l);
  letter-spacing:.10em;margin-bottom:14px;
}
.step h3{color:var(--paper);font-size:15.5px;margin-bottom:8px;font-family:var(--serif);font-weight:600}
.step p{font-size:12.8px;color:#A79E90;line-height:1.75}
.step::after{content:"";position:absolute;left:0;top:-1px;width:26px;height:2px;background:var(--accent)}
/* 浅色区块里的步骤卡：反色 */
.section.alt .step,.section:not(.dark) .step{border-color:var(--line)}
.section.alt .steps,.section:not(.dark) .steps{border-top-color:var(--line)}
.section.alt .step-n,.section:not(.dark) .step-n{color:var(--accent)}
.section.alt .step h3,.section:not(.dark) .step h3{color:var(--ink)}
.section.alt .step p,.section:not(.dark) .step p{color:var(--muted)}

/* ---------------- 表格 ---------------- */
.table-wrap{border:1px solid var(--line);overflow:hidden;background:var(--paper-2)}
.tbl-scroll{overflow-x:auto}
table.bb{width:100%;border-collapse:collapse;font-size:13.5px;min-width:640px}
table.bb th{
  text-align:left;padding:12px 16px;color:var(--ink);font-weight:700;font-size:11.5px;
  letter-spacing:.10em;text-transform:uppercase;white-space:nowrap;font-family:var(--mono);
  border-bottom:1px solid var(--ink);
}
table.bb td{padding:14px 16px;border-bottom:1px solid var(--line-2);color:var(--body);vertical-align:middle}
table.bb tr:last-child td{border-bottom:0}
table.bb tbody tr:hover{background:var(--paper)}
table.bb b{color:var(--ink);font-weight:700}
.tbl-more{padding:16px;text-align:center;border-top:1px solid var(--line-2)}

/* ---------------- FAQ ---------------- */
.faq-list{display:grid;gap:0;max-width:none;border-top:1px solid var(--line)}
details.qa{border-bottom:1px solid var(--line);background:transparent}
details.qa[open]{background:var(--paper-2)}
details.qa summary{
  list-style:none;cursor:pointer;padding:19px 54px 19px 0;position:relative;
  font-weight:700;color:var(--ink);font-size:15px;line-height:1.6;
}
details.qa summary::-webkit-details-marker{display:none}
details.qa summary::after{
  content:"+";position:absolute;right:6px;top:50%;transform:translateY(-50%);
  font-family:var(--mono);font-size:19px;font-weight:400;color:var(--accent);
  transition:transform .2s ease;
}
details.qa[open] summary::after{content:"−"}
.qa-body{padding:0 54px 20px 0;color:var(--muted);font-size:14px;line-height:1.9}
.qa-body p+p{margin-top:10px}
.qa-body ul{margin:8px 0 0 18px;display:grid;gap:6px}

/* ---------------- 文章 ---------------- */
.art-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
.art{
  background:var(--paper-2);padding:26px 24px;display:flex;flex-direction:column;gap:11px;
  height:100%;transition:background .18s ease;
}
.art:hover{background:var(--paper)}
.art-cat{
  align-self:flex-start;font-family:var(--mono);font-size:10.5px;font-weight:600;letter-spacing:.08em;
  padding:3px 8px;border:1px solid var(--line);color:var(--muted);text-transform:uppercase;
}
.art h3{font-size:16px;line-height:1.5;font-family:var(--serif);font-weight:600}
.art p{font-size:13px;color:var(--muted);line-height:1.8;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.art-meta{display:flex;align-items:center;gap:8px;font-size:11.5px;color:var(--faint);
  margin-top:auto;padding-top:12px;font-family:var(--mono);letter-spacing:.04em}

/* ---------------- CTA ---------------- */
.cta{position:relative;overflow:hidden;padding:58px 52px;background:var(--ink);color:var(--paper);border-radius:2px}
.cta::before{content:"";position:absolute;left:0;top:0;width:100%;height:3px;background:var(--accent)}
.cta::after{
  content:"";position:absolute;right:-40px;bottom:-60px;width:280px;height:280px;
  border:1px solid rgba(250,247,241,.10);border-radius:50%;pointer-events:none;
}
.cta>*{position:relative;z-index:2}
.cta h2{color:var(--paper);margin-bottom:12px}
.cta p{color:#A79E90;max-width:620px}
.cta-actions{display:flex;gap:12px;margin-top:28px;flex-wrap:wrap}

/* ---------------- 页头 ---------------- */
.page-head{position:relative;background:var(--paper-3);color:var(--ink);padding:54px 0 52px;border-bottom:1px solid var(--line)}
.page-head h1{color:var(--ink);font-size:clamp(25px,3.3vw,38px)}
.page-head p{color:var(--muted);margin-top:14px;max-width:720px;font-size:14.5px;line-height:1.9}
.crumb{
  display:flex;align-items:center;gap:8px;font-family:var(--mono);font-size:11px;
  color:var(--faint);margin-bottom:18px;letter-spacing:.06em;text-transform:uppercase;
}
.crumb a:hover{color:var(--accent)}
.crumb i{color:var(--line);font-style:normal}

/* ---------------- 正文排版 ---------------- */
.prose{max-width:860px}
.prose h2{
  font-size:22px;margin:42px 0 14px;padding-top:16px;border-top:1px solid var(--line);line-height:1.45;
}
.prose h2:first-child{margin-top:0;padding-top:0;border-top:0}
.prose h3{font-size:16.5px;margin:26px 0 10px;color:var(--ink)}
.prose p{margin-bottom:14px;line-height:2;font-size:15px}
.prose ul,.prose ol{margin:0 0 16px 22px;display:grid;gap:8px;color:var(--body);font-size:14.8px}
.prose li::marker{color:var(--accent);font-weight:700}
.prose blockquote{
  margin:20px 0;padding:16px 20px;border-left:2px solid var(--accent);
  background:var(--paper-3);color:var(--ink-2);font-size:14.5px;
}
.prose strong{color:var(--ink);font-weight:700}
.prose a{color:var(--accent);font-weight:600;border-bottom:1px solid rgba(178,58,46,.34)}
.prose a:hover{border-bottom-color:var(--accent)}
.prose table{width:100%;border-collapse:collapse;margin:18px 0;font-size:14px}
.prose th,.prose td{padding:10px 13px;border:1px solid var(--line);text-align:left}
.prose th{background:var(--paper-3);font-weight:700;color:var(--ink)}

/* ---------------- 侧栏 ---------------- */
.two-col{display:grid;grid-template-columns:1fr 316px;gap:52px;align-items:start}
.side-card{
  background:var(--paper-2);border:1px solid var(--line);padding:24px;
  position:sticky;top:calc(var(--nav-h) + 18px);border-radius:2px;
}
.side-card h3{font-size:15px;margin-bottom:6px}
.side-card .sc-sub{font-size:12.5px;color:var(--muted);margin-bottom:18px;line-height:1.7}
.sc-row{display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:10px 0;border-bottom:1px solid var(--line-2);font-size:13px}
.sc-row:last-of-type{border-bottom:0}
.sc-row span{color:var(--muted)}
.sc-row b{color:var(--ink);font-weight:700}
.sc-btn{
  display:flex;align-items:center;justify-content:center;height:44px;
  background:var(--accent);color:#fff;font-weight:700;font-size:13.5px;margin-top:16px;border-radius:2px;
}
.sc-btn:hover{background:var(--accent-d)}
.sc-btn.ghost{background:transparent;color:var(--ink);border:1px solid var(--ink)}
.sc-btn.ghost:hover{background:var(--ink);color:var(--paper)}

/* ---------------- 页脚 ---------------- */
footer.site{background:var(--ink);color:#9C9488;padding:62px 0 0}
.foot-top{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.15fr;gap:44px;padding-bottom:44px}
.f-brand .brand-txt b{color:var(--paper)}
.f-brand .brand-txt small{color:#6E675C}
.f-brand p{margin-top:18px;font-size:13px;line-height:1.95;color:#9C9488;max-width:340px}
.f-brand .f-code{
  display:inline-flex;align-items:center;gap:10px;margin-top:20px;padding:9px 13px;
  border:1px solid rgba(250,247,241,.20);font-size:12px;color:#9C9488;
}
.f-brand .f-code b{color:var(--paper);font-family:var(--mono);font-weight:700;letter-spacing:.10em;font-size:14px}
.f-col h4{color:var(--paper);font-size:11px;font-weight:600;margin-bottom:18px;
  letter-spacing:.14em;text-transform:uppercase;font-family:var(--mono)}
.f-col a,.f-col span{display:block;font-size:13px;color:#9C9488;padding:6px 0;transition:color .16s}
.f-col a:hover{color:var(--paper)}
.f-bottom{
  border-top:1px solid rgba(250,247,241,.12);padding:22px 0 26px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:12px;color:#6E675C;
}
.f-bottom .fb-l{display:flex;flex-wrap:wrap;gap:16px}
.f-bottom a:hover{color:var(--paper)}
.disclaimer{font-size:11.5px;color:#5F594F;line-height:1.75;margin-top:8px}

/* ---------------- 返回顶部 ---------------- */
.to-top{
  position:fixed;right:22px;bottom:26px;width:42px;height:42px;
  background:var(--paper-2);border:1px solid var(--ink);color:var(--ink);
  display:flex;align-items:center;justify-content:center;border-radius:2px;
  opacity:0;visibility:hidden;transform:translateY(8px);transition:all .22s ease;z-index:200;
}
.to-top.show{opacity:1;visibility:visible;transform:none}
.to-top:hover{background:var(--ink);color:var(--paper)}

/* ==========================================================
   v3 新增：编辑式版块
   ========================================================== */

/* 分隔线标题 */
.rule-h{
  display:flex;align-items:center;gap:16px;margin-bottom:34px;
  font-family:var(--mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--muted);
}
.rule-h::after{content:"";flex:1;height:1px;background:var(--line)}

/* 数据条 */
.stat-strip{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--ink);border-bottom:1px solid var(--line)}
.stat{padding:24px 24px 26px 0;border-right:1px solid var(--line)}
.stat:last-child{border-right:0}
.stat b{display:block;font-family:var(--serif);font-size:34px;font-weight:600;color:var(--ink);line-height:1.1;margin-bottom:6px}
.stat b small{font-size:14px;font-family:var(--sans);color:var(--muted);font-weight:600;margin-left:3px}
.stat span{font-size:12.5px;color:var(--muted);letter-spacing:.02em}
.stat i{display:block;font-family:var(--mono);font-size:10px;color:var(--faint);font-style:normal;
  letter-spacing:.12em;margin-bottom:10px;text-transform:uppercase}

/* 场景入口（编号 + 细线） */
.entry-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border-top:1px solid var(--line)}
.entry{
  position:relative;display:block;padding:30px 28px 30px 0;border-bottom:1px solid var(--line);
  transition:padding-left .22s ease;
}
.entry+.entry{padding-left:28px;border-left:1px solid var(--line)}
.entry:hover{padding-left:10px}
.entry+.entry:hover{padding-left:38px}
.entry-n{font-family:var(--mono);font-size:11px;color:var(--accent);letter-spacing:.12em;display:block;margin-bottom:14px}
.entry h3{font-family:var(--serif);font-size:21px;font-weight:600;margin-bottom:10px;line-height:1.35}
.entry p{font-size:13.5px;color:var(--muted);line-height:1.85;margin-bottom:14px}
.entry .entry-f{display:inline-flex;align-items:center;gap:7px;font-size:12.5px;font-weight:700;color:var(--accent)}
.entry .entry-f::after{content:"→";transition:transform .2s ease}
.entry:hover .entry-f::after{transform:translateX(4px)}

/* 行式套餐清单 */
.plist{border-top:1px solid var(--ink)}
.prow{
  display:grid;grid-template-columns:76px 1.5fr 92px 1fr 1fr 118px;
  align-items:center;gap:16px;padding:18px 0;border-bottom:1px solid var(--line);
  transition:background .16s ease,padding .16s ease;
}
.prow:hover{background:var(--paper-3);padding-left:12px;padding-right:12px}
.prow-op{font-family:var(--mono);font-size:11px;letter-spacing:.06em;color:var(--muted)}
.prow-name{font-family:var(--serif);font-size:17.5px;font-weight:600;color:var(--ink);line-height:1.35}
.prow-name small{display:block;font-family:var(--sans);font-size:11.5px;font-weight:400;color:var(--faint);margin-top:3px}
.prow-flow{font-family:var(--mono);font-size:15px;color:var(--ink);font-weight:600}
.prow-flow small{font-size:11px;color:var(--muted);font-weight:400}
.prow-kv{font-size:12.5px;color:var(--muted);line-height:1.6}
.prow-kv b{color:var(--ink-2);font-weight:600}
.prow-go{
  display:inline-flex;align-items:center;justify-content:center;height:34px;
  border:1px solid var(--line);font-size:12.5px;font-weight:600;color:var(--ink);
  transition:all .16s ease;
}
.prow:hover .prow-go{background:var(--accent);border-color:var(--accent);color:#fff}
.plist-head{
  display:grid;grid-template-columns:76px 1.5fr 92px 1fr 1fr 118px;gap:16px;
  padding:10px 0;border-bottom:1px solid var(--line);
  font-family:var(--mono);font-size:10.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--faint);
}

/* 分布条 */
.bars{display:grid;gap:14px;max-width:640px}
.bar{display:grid;grid-template-columns:88px 1fr 54px;align-items:center;gap:14px}
.bar-l{font-size:12.5px;color:var(--muted);font-family:var(--mono);letter-spacing:.02em}
.bar-t{height:9px;background:var(--paper-3);position:relative;overflow:hidden}
.bar-t i{position:absolute;left:0;top:0;height:100%;background:var(--accent);display:block}
.bar-v{font-family:var(--mono);font-size:12px;color:var(--ink);text-align:right}

/* 纵向时间线 */
.tl{border-left:1px solid rgba(250,247,241,.20);margin-left:6px}
.tl-item{position:relative;padding:0 0 32px 26px}
.tl-item:last-child{padding-bottom:0}
.tl-item::before{
  content:"";position:absolute;left:-4px;top:7px;width:7px;height:7px;background:var(--accent);
}
.tl-item b{
  display:block;font-family:var(--mono);font-size:10.5px;letter-spacing:.14em;
  color:var(--accent-l);margin-bottom:6px;text-transform:uppercase;
}
.tl-item h3{font-family:var(--serif);font-size:18px;font-weight:600;color:var(--paper);margin-bottom:7px}
.tl-item p{font-size:13.2px;color:#A79E90;line-height:1.85;max-width:620px}

/* FAQ 双栏 */
.qgrid{display:grid;grid-template-columns:1fr 1fr;gap:0 48px;border-top:1px solid var(--line)}
.qgrid details.qa{border-bottom:1px solid var(--line)}

/* 注释条 */
.note{
  border-left:2px solid var(--accent);padding:4px 0 4px 16px;margin:22px 0;
  font-size:13px;color:var(--muted);line-height:1.85;
}

/* 双栏文本 + 侧注 */
.lede-grid{display:grid;grid-template-columns:1.35fr .65fr;gap:56px;align-items:start}
.aside-note{border-top:1px solid var(--ink);padding-top:18px}
.aside-note h4{font-family:var(--mono);font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--muted);margin-bottom:14px;font-weight:600}
.aside-note p{font-size:13px;color:var(--muted);line-height:1.9}
.aside-note p+p{margin-top:12px}

/* ---------------- 响应式 ---------------- */
@media(max-width:1080px){
  .feat-grid{grid-template-columns:repeat(2,1fr)}
  .feat:nth-child(3n){padding-right:30px;border-right:1px solid var(--line)}
  .feat:nth-child(2n){padding-right:0;border-right:0}
  .feat:not(:nth-child(3n+1)){padding-left:0}
  .feat:nth-child(2n){padding-left:30px}
  .plan-grid{grid-template-columns:repeat(3,1fr)}
  .art-grid{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(3,1fr)}
  .step{padding-bottom:26px}
  .steps.cols4{grid-template-columns:repeat(4,1fr)}
  .two-col{grid-template-columns:1fr;gap:36px}
  .side-card{position:static}
  .foot-top{grid-template-columns:1.4fr 1fr 1fr;gap:32px}
  .f-col.f-contact{grid-column:1/-1}
  .prow,.plist-head{grid-template-columns:64px 1.4fr 84px 1fr 104px}
  .prow-kv:nth-of-type(2){display:none}
  .lede-grid{grid-template-columns:1fr;gap:34px}
}
@media(max-width:900px){
  .hero.hero-sm{padding:44px 0 50px}
  .cta.cta-sm{padding:34px 22px}
  .flow-strip{grid-template-columns:repeat(2,1fr)}
  .fs-item+.fs-item{border-left:0;border-top:1px solid var(--line)}
  .fs-item:nth-child(2n){border-left:1px solid var(--line)}
  .fs-item:nth-child(1),.fs-item:nth-child(2){border-top:0}
  .hero-inner{grid-template-columns:1fr;gap:42px}
  .hero{padding:52px 0 58px}
  .invite-card{max-width:460px}
  .navlinks{
    position:fixed;inset:calc(var(--nav-h) + 33px) 0 auto 0;z-index:290;
    flex-direction:column;align-items:stretch;gap:0;margin:0;padding:8px 24px 22px;
    background:var(--paper);border-bottom:1px solid var(--line);
    transform:translateY(-10px);opacity:0;visibility:hidden;transition:all .2s ease;
  }
  .navlinks.open{transform:none;opacity:1;visibility:visible}
  .navlinks a{padding:13px 0;font-size:15px;border-bottom:1px solid var(--line-2)}
  .navlinks a::after{display:none}
  .nav-actions{border-left:0;padding-left:0}
  .nav-actions .nav-link{display:none}
  .menu-btn{display:flex}
  .foot-top{grid-template-columns:1fr 1fr}
  .f-brand{grid-column:1/-1}
  .topbar .hide-m{display:none}
  .entry-grid{grid-template-columns:1fr}
  .entry,.entry+.entry{padding:24px 0;border-left:0;border-bottom:1px solid var(--line)}
  .entry:hover,.entry+.entry:hover{padding-left:0}
  .stat-strip{grid-template-columns:1fr 1fr}
  .stat:nth-child(2n){border-right:0}
  .stat:nth-child(1),.stat:nth-child(2){border-bottom:1px solid var(--line)}
  .qgrid{grid-template-columns:1fr;gap:0}
}
@media(max-width:760px){
  .flow-strip{grid-template-columns:1fr}
  .fs-item+.fs-item{border-left:0;border-top:1px solid var(--line)}
  .fs-item:nth-child(2){border-top:1px solid var(--line)}
  .plan-grid{grid-template-columns:repeat(2,1fr)}
  .feat-grid{grid-template-columns:1fr}
  .feat,.feat:nth-child(2n),.feat:nth-child(3n){padding:24px 0;border-right:0}
  .art-grid{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .steps.cols4{grid-template-columns:repeat(2,1fr)}
  .step{border-right:0;border-bottom:1px solid rgba(250,247,241,.12);padding:24px 0}
  .section.alt .step,.section:not(.dark) .step{border-bottom:1px solid var(--line)}
  .section{padding:52px 0}
  .section.tight{padding:40px 0}
  .head{margin-bottom:28px}
  .search-box{margin-left:0;width:100%}
  .cta{padding:34px 22px}
  .hero-nums{gap:0;padding-top:18px}
  .hero-nums div{padding-right:20px;margin-right:20px}
  .hero-nums b{font-size:22px}
  .foot-top{grid-template-columns:1fr 1fr;gap:28px 20px;padding-bottom:30px}
  .f-brand{grid-column:1/-1}
  .f-brand p{max-width:none}
  .f-col h4{margin-bottom:10px}
  .f-bottom{padding:18px 0 24px}

  /* 行式清单 -> 卡片式堆叠 */
  .plist-head{display:none}
  .prow{
    grid-template-columns:1fr auto;gap:6px 12px;padding:16px 0;align-items:start;
  }
  .prow-op{grid-column:1;font-size:10.5px}
  .prow-name{grid-column:1/-1;font-size:16px}
  .prow-flow{grid-column:1;font-size:14px}
  .prow-kv{grid-column:1;font-size:12px}
  .prow-kv:nth-of-type(2){display:block}
  .prow-go{grid-column:2;grid-row:1/3;align-self:center;height:32px;padding:0 12px}

  /* 宽带表格 -> 卡片式 */
  .tbl-scroll{overflow-x:visible}
  table.bb{display:block;min-width:0;font-size:13px}
  table.bb thead{display:none}
  table.bb tbody{display:block}
  table.bb tr{position:relative;display:block;padding:14px 16px;border-bottom:1px solid var(--line-2)}
  table.bb tr:last-child{border-bottom:0}
  table.bb td{display:inline-block;border:0;padding:0;vertical-align:baseline}
  table.bb td:first-child{display:block;padding-right:88px;margin-bottom:9px;font-size:14.5px}
  table.bb td:first-child b{font-weight:700}
  table.bb td:nth-child(5){position:absolute;top:13px;right:16px;font-size:14px;font-weight:700;color:var(--accent)}
  table.bb td:nth-child(2),table.bb td:nth-child(3),table.bb td:nth-child(4),table.bb td:nth-child(6){
    margin:0 6px 4px 0;padding:1px 8px;border:1px solid var(--line-2);
    color:var(--muted);font-size:11.5px;line-height:1.7;
  }
  .tbl-more{padding:12px}
  .stat b{font-size:28px}
}
@media(max-width:520px){
  .plan-grid{grid-template-columns:repeat(2,1fr)}
  .plan{padding:16px 14px 14px}
  .plan-top{gap:6px;margin-bottom:8px}
  .op-badge{height:19px;padding:0 6px;font-size:10px}
  .plan-flag{font-size:9px;padding:1px 5px}
  .plan h3{font-size:14px;margin-bottom:10px}
  .plan-flow b{font-size:22px}
  .plan-flow span{font-size:10.5px}
  .plan-price{font-size:11px;margin-bottom:10px}
  .plan-price b{font-size:13px}
  .plan-specs{gap:5px;padding-top:10px;margin-bottom:12px}
  .plan-specs div{font-size:10.5px}
  .plan-go{height:32px;font-size:11.5px;padding:0 9px}
  .steps,.steps.cols4{grid-template-columns:1fr}
  .btn-lg{height:50px;padding:0 20px;font-size:14px}
  .hero-nums{display:grid;grid-template-columns:1fr 1fr;gap:12px 16px}
  .hero-nums div{border-right:0;padding-right:0;margin-right:0}
  .hero-nums b{font-size:20px}
  .hero-nums span{font-size:11px}
  .ic-code{font-size:36px}
  .art{padding:20px 18px}
  .art h3{font-size:15px}
  .stat{padding:18px 16px 20px 0}
  .stat b{font-size:24px}
  .stat span{font-size:11.5px}
  .cta{padding:30px 20px}
  .page-head{padding:38px 0 36px}
  .bar{grid-template-columns:72px 1fr 42px;gap:10px}
  .bar-l{font-size:11px}
}