/* ==========================================================
   号易官网 · 2026 全新视觉系统
   深空蓝 × 电光青 · 玻璃拟态 + 大留白
   ========================================================== */

:root{
  --ink:#0A1226;
  --ink-2:#16233D;
  --body:#334155;
  --muted:#64748B;
  --faint:#94A3B8;

  --brand:#2B59FF;
  --brand-d:#1D43D6;
  --brand-l:#5B80FF;
  --mint:#06D6A0;
  --mint-d:#04B183;
  --violet:#7C5CFF;

  --bg:#F6F8FC;
  --bg-2:#FFFFFF;
  --bg-3:#EEF3FB;

  --line:#E4EAF5;
  --line-2:#F1F5FB;

  --grad:linear-gradient(135deg,#2B59FF 0%,#7C5CFF 52%,#06D6A0 100%);
  --grad-soft:linear-gradient(135deg,rgba(43,89,255,.10),rgba(6,214,160,.10));

  --sh-sm:0 1px 2px rgba(10,18,38,.06),0 2px 8px rgba(10,18,38,.04);
  --sh:0 4px 12px rgba(10,18,38,.06),0 12px 32px rgba(10,18,38,.06);
  --sh-lg:0 10px 24px rgba(10,18,38,.08),0 30px 70px rgba(10,18,38,.10);
  --sh-brand:0 10px 30px rgba(43,89,255,.28);

  --r-sm:10px;
  --r:16px;
  --r-lg:22px;
  --wrap:1200px;
  --nav-h:70px;
}

*{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  background:var(--bg);color:var(--body);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  font-size:15.5px;line-height:1.75;-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(43,89,255,.16)}

.wrap{width:min(var(--wrap),calc(100% - 44px));margin-inline:auto}
@media(min-width:1500px){.wrap{width:min(1320px,calc(100% - 96px))}}

h1,h2,h3,h4{color:var(--ink);font-weight:800;letter-spacing:-.02em;line-height:1.25}
h1{font-size:clamp(29px,4.4vw,50px)}
h2{font-size:clamp(23px,3vw,34px)}
h3{font-size:17px;font-weight:750}
p{color:var(--body)}

/* ---------------- 通用按钮 ---------------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:12px;font-weight:700;font-size:14.5px;
  transition:transform .18s ease,box-shadow .22s ease,background .2s ease,color .2s ease;
  white-space:nowrap;
}
.btn:hover{transform:translateY(-2px)}
.btn-main{background:var(--brand);color:#fff;box-shadow:var(--sh-brand)}
.btn-main:hover{background:var(--brand-d);box-shadow:0 14px 34px rgba(43,89,255,.36)}
.btn-ghost{background:#fff;color:var(--ink);border:1.5px solid var(--line);box-shadow:var(--sh-sm)}
.btn-ghost:hover{border-color:#C7D4EC;color:var(--brand)}
.btn-dark{background:var(--ink);color:#fff}
.btn-dark:hover{background:#16233D}
.btn-lg{height:54px;padding:0 30px;font-size:15.5px;border-radius:14px}
.btn-sm{height:38px;padding:0 16px;font-size:13.5px;border-radius:10px}
.btn-ghost-light{background:rgba(255,255,255,.10);color:#fff;border:1.5px solid rgba(255,255,255,.26);backdrop-filter:blur(8px)}
.btn-ghost-light:hover{background:rgba(255,255,255,.18);border-color:rgba(255,255,255,.45)}

/* ---------------- 顶部条 ---------------- */
.topbar{background:var(--ink);color:#A9B7D0;font-size:12.5px}
.topbar .wrap{display:flex;align-items:center;justify-content:space-between;gap:14px;height:34px}
.topbar .tb-l{display:inline-flex;align-items:center;gap:9px;min-width:0}
.topbar .dot{width:6px;height:6px;border-radius:50%;background:var(--mint);box-shadow:0 0 0 3px rgba(6,214,160,.18);flex:none}
.topbar .tb-r{display:inline-flex;align-items:center;gap:8px;white-space:nowrap}
.topbar a{color:#D7E1F2}
.topbar a:hover{color:#fff}
.topbar b{color:#fff;font-weight:700}
.topbar .sep{color:#3B4A66}

/* ---------------- 导航 ---------------- */
header.site{
  position:sticky;top:0;z-index:300;background:rgba(255,255,255,.88);
  backdrop-filter:saturate(180%) blur(18px);-webkit-backdrop-filter:saturate(180%) blur(18px);
  border-bottom:1px solid var(--line-2);
}
.nav{height:var(--nav-h);display:flex;align-items:center;gap:20px}
.brand{display:flex;align-items:center;gap:11px;flex:none;margin-right:6px}
.logo-mark{
  width:40px;height:40px;border-radius:11px;flex:none;object-fit:cover;
  background:#fff;box-shadow:0 6px 16px rgba(255,116,63,.26);
}
.brand-txt{display:flex;flex-direction:column;line-height:1.15}
.brand-txt b{font-size:17.5px;font-weight:850;color:var(--ink);letter-spacing:-.02em}
.brand-txt small{font-size:11px;color:var(--faint);letter-spacing:.04em;font-weight:600}

.navlinks{display:flex;align-items:center;gap:2px;margin-left:auto}
.navlinks a{
  position:relative;padding:8px 12px;border-radius:9px;font-size:14px;font-weight:650;color:#41506B;
  transition:color .18s,background .18s;
}
.navlinks a:hover{color:var(--brand);background:var(--bg-3)}
.navlinks a.on{color:var(--brand);background:rgba(43,89,255,.08)}
.nav-actions{display:flex;align-items:center;gap:10px;flex:none}
.nav-link{font-size:13.5px;font-weight:650;color:#41506B;padding:8px 6px}
.nav-link:hover{color:var(--brand)}
.menu-btn{
  display:none;width:42px;height:42px;border-radius:11px;border:1.5px solid var(--line);
  background:#fff;font-size:19px;line-height:1;color:var(--ink);align-items:center;justify-content:center;
}

/* ---------------- HERO ---------------- */
.hero{
  position:relative;overflow:hidden;background:var(--ink);color:#E8EEFA;
  padding:74px 0 84px;
}
.hero::before{
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(760px 420px at 12% -10%,rgba(43,89,255,.55),transparent 68%),
    radial-gradient(620px 380px at 88% 8%,rgba(6,214,160,.30),transparent 70%),
    radial-gradient(520px 400px at 60% 110%,rgba(124,92,255,.34),transparent 72%);
}
.hero::after{
  content:"";position:absolute;inset:0;opacity:.30;
  background-image:linear-gradient(rgba(255,255,255,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.06) 1px,transparent 1px);
  background-size:56px 56px;
  mask-image:radial-gradient(circle at 50% 25%,#000 30%,transparent 78%);
  -webkit-mask-image:radial-gradient(circle at 50% 25%,#000 30%,transparent 78%);
}
.hero .wrap{position:relative;z-index:2}
.hero-inner{display:grid;grid-template-columns:1.12fr .88fr;gap:54px;align-items:center}
.hero-tag{
  display:inline-flex;align-items:center;gap:8px;height:32px;padding:0 14px;border-radius:999px;
  background:rgba(255,255,255,.09);border:1px solid rgba(255,255,255,.17);
  font-size:12.5px;font-weight:700;color:#CFE0FF;letter-spacing:.02em;backdrop-filter:blur(6px);
}
.hero-tag i{width:6px;height:6px;border-radius:50%;background:var(--mint);box-shadow:0 0 10px var(--mint)}
.hero h1{color:#fff;margin:20px 0 16px}
.hero h1 em{
  background:linear-gradient(96deg,#7FA5FF,#8FF3D8 72%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero .lead{color:#B9C8E2;font-size:16px;max-width:560px;line-height:1.85}
.hero-actions{display:flex;gap:12px;margin-top:30px;flex-wrap:wrap}
.hero-nums{display:flex;gap:34px;margin-top:38px;flex-wrap:wrap}
.hero-nums div{display:flex;flex-direction:column;gap:2px}
.hero-nums b{font-size:25px;font-weight:850;color:#fff;letter-spacing:-.02em}
.hero-nums span{font-size:12.5px;color:#8FA3C4}

/* 邀请码卡片 */
.invite-card{
  position:relative;border-radius:var(--r-lg);padding:26px;
  background:linear-gradient(160deg,rgba(255,255,255,.14),rgba(255,255,255,.05));
  border:1px solid rgba(255,255,255,.20);
  box-shadow:0 30px 80px rgba(4,10,26,.55);
  backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
}
.invite-card::before{
  content:"";position:absolute;inset:0;border-radius:var(--r-lg);pointer-events:none;
  background:linear-gradient(160deg,rgba(255,255,255,.22),transparent 46%);
  mask-image:linear-gradient(#000,transparent 60%);-webkit-mask-image:linear-gradient(#000,transparent 60%);
}
.ic-top{display:flex;align-items:center;justify-content:space-between;font-size:11px;letter-spacing:.14em;color:#9DB2D6;font-weight:700}
.ic-code{
  margin:14px 0 6px;font-size:46px;font-weight:900;letter-spacing:.10em;color:#fff;
  font-variant-numeric:tabular-nums;line-height:1.1;
  background:linear-gradient(120deg,#fff,#A8C4FF 60%,#8FF3D8);
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
}
.ic-hint{font-size:12.5px;color:#9DB2D6;margin-bottom:20px}
.ic-btn{
  display:flex;align-items:center;justify-content:center;gap:8px;height:48px;border-radius:12px;
  background:#fff;color:var(--ink);font-weight:800;font-size:14.5px;
  box-shadow:0 10px 26px rgba(0,0,0,.28);transition:transform .18s,box-shadow .2s;
}
.ic-btn:hover{transform:translateY(-2px);box-shadow:0 16px 34px rgba(0,0,0,.34)}
.ic-list{margin-top:20px;display:grid;gap:9px}
.ic-list div{display:flex;align-items:flex-start;gap:9px;font-size:13px;color:#C6D5EE}
.ic-list i{
  flex:none;width:16px;height:16px;border-radius:50%;margin-top:3px;
  background:rgba(6,214,160,.20);color:var(--mint);font-size:10px;font-weight:900;
  display:flex;align-items:center;justify-content:center;font-style:normal;
}

/* ---------------- 通用区块 ---------------- */
.section{padding:76px 0}
.section.tight{padding:56px 0}
.section.alt{background:var(--bg-2);border-block:1px solid var(--line-2)}
.section.dark{background:var(--ink);color:#C6D5EE}
.head{max-width:720px;margin-bottom:44px}
.head.center{margin-inline:auto;text-align:center}
.kicker{
  display:inline-block;font-size:11.5px;font-weight:800;letter-spacing:.16em;
  color:var(--brand);text-transform:uppercase;margin-bottom:12px;
}
.head h2 em{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.head p{margin-top:12px;color:var(--muted);font-size:15px;line-height:1.8}
.section.dark .head h2,.section.dark h2{color:#fff}
.section.dark .head p{color:#93A6C4}
.section.dark .kicker{color:var(--mint)}

/* ---------------- 特性 ---------------- */
.feat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.feat{
  position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--r);
  padding:26px 24px 24px;transition:transform .2s ease,box-shadow .24s ease,border-color .2s ease;
  overflow:hidden;
}
.feat::after{
  content:"";position:absolute;left:0;top:0;height:3px;width:0;background:var(--grad);
  transition:width .3s ease;
}
.feat:hover{transform:translateY(-4px);box-shadow:var(--sh-lg);border-color:#D8E3F6}
.feat:hover::after{width:100%}
.fi{
  width:46px;height:46px;border-radius:13px;display:flex;align-items:center;justify-content:center;
  background:var(--grad-soft);border:1px solid rgba(43,89,255,.14);color:var(--brand);margin-bottom:16px;
}
.fi svg{width:23px;height:23px}
.feat h3{margin-bottom:8px}
.feat p{font-size:13.8px;color:var(--muted);line-height:1.75}

/* ---------------- 套餐卡 ---------------- */
.filters{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin-bottom:26px}
.chip{
  height:38px;padding:0 16px;border-radius:10px;background:#fff;border:1.5px solid var(--line);
  font-size:13.5px;font-weight:700;color:#41506B;display:inline-flex;align-items:center;gap:6px;
  transition:all .16s ease;
}
.chip:hover{border-color:#BFD0EC;color:var(--brand)}
.chip.on{background:var(--ink);border-color:var(--ink);color:#fff;box-shadow:0 6px 16px rgba(10,18,38,.18)}
.chip span{font-size:11.5px;opacity:.6;font-weight:700}
.chip.on span{opacity:.75}
.search-box{
  margin-left:auto;display:flex;align-items:center;gap:8px;height:38px;padding:0 14px;
  background:#fff;border:1.5px solid var(--line);border-radius:10px;min-width:230px;
}
.search-box:focus-within{border-color:var(--brand-l);box-shadow:0 0 0 3px rgba(43,89,255,.10)}
.search-box svg{width:15px;height:15px;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)}

.plan-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.plan{
  position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--r);
  padding:22px 20px 20px;display:flex;flex-direction:column;gap:0;
  transition:transform .18s ease,box-shadow .22s ease,border-color .18s ease;
}
.plan:hover{transform:translateY(-3px);box-shadow:var(--sh-lg);border-color:#CFDDF4}
.plan.hot{border-color:rgba(43,89,255,.34);box-shadow:0 4px 18px rgba(43,89,255,.08)}
.plan-top{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-bottom:12px}
.op-badge{
  display:inline-flex;align-items:center;height:23px;padding:0 9px;border-radius:6px;
  font-size:11.5px;font-weight:800;letter-spacing:.02em;
}
.op-移动{background:#EAF2FF;color:#1B62D6}
.op-联通{background:#FFEFEF;color:#D62B2B}
.op-电信{background:#EAF6FF;color:#0A7BC0}
.op-广电{background:#F2EEFF;color:#6B3FD4}
.op-其他{background:#F1F5F9;color:#556}
.plan-flag{
  font-size:10.5px;font-weight:800;letter-spacing:.06em;padding:2px 7px;border-radius:5px;
  background:var(--grad);color:#fff;
}
.plan h3{font-size:16.5px;margin-bottom:10px;line-height:1.35}
.plan-flow{display:flex;align-items:baseline;gap:5px;margin-bottom:4px}
.plan-flow b{font-size:27px;font-weight:850;color:var(--ink);letter-spacing:-.03em;line-height:1.1}
.plan-flow span{font-size:12.5px;color:var(--muted);font-weight:600}
.plan-price{font-size:13px;color:var(--brand);font-weight:800;margin-bottom:14px}
.plan-price b{font-size:16px}
.plan-specs{display:grid;gap:6px;padding-top:13px;border-top:1px dashed var(--line);margin-bottom:16px}
.plan-specs div{display:flex;justify-content:space-between;gap:8px;font-size:12.5px;color:var(--muted)}
.plan-specs b{color:var(--ink-2);font-weight:700;text-align:right}
.plan-go{
  margin-top:auto;display:flex;align-items:center;justify-content:center;height:40px;border-radius:10px;
  background:var(--bg-3);color:var(--ink);font-size:13.5px;font-weight:750;transition:all .16s;
}
.plan:hover .plan-go{background:var(--brand);color:#fff;box-shadow:var(--sh-brand)}
.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:58px 0 64px}
.hero-sm h1{margin:18px 0 14px}
.hero-sm .lead{font-size:15.5px;max-width:520px}
.hero-sm .hero-actions{margin-top:26px}
.hero-sm .hero-nums{margin-top:30px}
.cta.cta-sm{padding:44px 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;
  background:#fff;border:1px solid var(--line);border-radius:var(--r);
  overflow:hidden;box-shadow:var(--sh-sm);
}
.fs-item{
  position:relative;display:flex;flex-direction:column;gap:5px;
  padding:24px 20px 24px 22px;
}
.fs-item+.fs-item{border-left:1px solid var(--line-2)}
.fs-n{
  font-style:normal;width:26px;height:26px;border-radius:8px;flex:none;
  background:var(--grad-soft);border:1px solid rgba(43,89,255,.16);color:var(--brand);
  display:flex;align-items:center;justify-content:center;
  font-size:12.5px;font-weight:900;margin-bottom:5px;
}
.fs-item b{font-size:14.5px;color:var(--ink);font-weight:800;letter-spacing:-.01em}
.fs-item span{font-size:12.5px;color:var(--muted);line-height:1.6}

/* ---------------- 步骤 ---------------- */
.steps{display:grid;grid-template-columns:repeat(5,1fr);gap:14px;counter-reset:s}
.step{
  position:relative;background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.12);
  border-radius:var(--r);padding:22px 18px;
}
.step-n{
  width:30px;height:30px;border-radius:9px;display:flex;align-items:center;justify-content:center;
  font-size:13px;font-weight:900;color:var(--ink);background:var(--mint);margin-bottom:14px;
}
.step h3{color:#fff;font-size:15px;margin-bottom:7px}
.step p{font-size:12.8px;color:#93A6C4;line-height:1.7}
.step::after{
  content:"→";position:absolute;right:-12px;top:50%;transform:translateY(-50%);
  color:rgba(255,255,255,.28);font-size:16px;
}
.step:last-child::after{display:none}
/* 浅色区块里的步骤卡（代理加盟页）：反色，保证标题可见 */
.section.alt .step,.section:not(.dark) .step{background:#fff;border-color:var(--line);box-shadow:var(--sh-sm)}
.section.alt .step h3,.section:not(.dark) .step h3{color:var(--ink)}
.section.alt .step p,.section:not(.dark) .step p{color:var(--body)}
.section.alt .step::after,.section:not(.dark) .step::after{color:var(--faint)}

/* ---------------- 表格 ---------------- */
.table-wrap{background:#fff;border:1px solid var(--line);border-radius:var(--r);overflow:hidden}
.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:13px 16px;background:var(--bg-3);color:var(--ink);
  font-weight:800;font-size:12.5px;letter-spacing:.02em;white-space:nowrap;
  border-bottom:1px solid var(--line);position:sticky;top:0;
}
table.bb td{padding:12px 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:#FAFCFF}
table.bb b{color:var(--ink);font-weight:750}
.tbl-more{padding:14px;text-align:center;border-top:1px solid var(--line-2);background:#FCFDFF}

/* ---------------- FAQ ---------------- */
.faq-list{display:grid;gap:10px;max-width:900px}
details.qa{
  background:#fff;border:1px solid var(--line);border-radius:var(--r);overflow:hidden;
  transition:border-color .18s,box-shadow .2s;
}
details.qa[open]{border-color:rgba(43,89,255,.30);box-shadow:var(--sh)}
details.qa summary{
  list-style:none;cursor:pointer;padding:17px 52px 17px 20px;position:relative;
  font-weight:750;color:var(--ink);font-size:14.5px;
}
details.qa summary::-webkit-details-marker{display:none}
details.qa summary::after{
  content:"+";position:absolute;right:20px;top:50%;transform:translateY(-50%);
  width:22px;height:22px;border-radius:6px;background:var(--bg-3);color:var(--brand);
  display:flex;align-items:center;justify-content:center;font-size:15px;font-weight:800;
  transition:transform .2s,background .2s;
}
details.qa[open] summary::after{content:"−";background:var(--brand);color:#fff}
.qa-body{padding:0 20px 18px;color:var(--muted);font-size:14px;line-height:1.85}
.qa-body p+p{margin-top:10px}
.qa-body ul{margin:8px 0 0 18px;display:grid;gap:6px}

/* ---------------- 文章卡 ---------------- */
.art-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.art{
  background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:24px 22px;
  display:flex;flex-direction:column;gap:10px;transition:transform .18s,box-shadow .22s,border-color .18s;
  height:100%;
}
.art:hover{transform:translateY(-3px);box-shadow:var(--sh-lg);border-color:#CFDDF4}
.art-cat{
  align-self:flex-start;font-size:11px;font-weight:800;letter-spacing:.04em;
  padding:3px 9px;border-radius:6px;background:rgba(43,89,255,.09);color:var(--brand);
}
.art h3{font-size:15.5px;line-height:1.45}
.art p{font-size:13.2px;color:var(--muted);line-height:1.7;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.art-meta{display:flex;align-items:center;gap:8px;font-size:12px;color:var(--faint);margin-top:auto;padding-top:10px}

/* ---------------- CTA ---------------- */
.cta{
  position:relative;overflow:hidden;border-radius:var(--r-lg);padding:54px 48px;
  background:var(--ink);color:#fff;
}
.cta::before{
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(600px 320px at 10% 0%,rgba(43,89,255,.60),transparent 70%),
    radial-gradient(520px 300px at 92% 110%,rgba(6,214,160,.34),transparent 72%);
}
.cta>*{position:relative;z-index:2}
.cta h2{color:#fff;margin-bottom:12px}
.cta p{color:#B9C8E2;max-width:620px}
.cta-actions{display:flex;gap:12px;margin-top:26px;flex-wrap:wrap}

/* ---------------- 页头 ---------------- */
.page-head{
  position:relative;overflow:hidden;background:var(--ink);color:#fff;padding:52px 0 56px;
}
.page-head::before{
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(620px 300px at 8% -20%,rgba(43,89,255,.52),transparent 70%),
    radial-gradient(480px 280px at 92% 120%,rgba(6,214,160,.28),transparent 72%);
}
.page-head .wrap{position:relative;z-index:2}
.page-head h1{color:#fff;font-size:clamp(24px,3.4vw,36px)}
.page-head p{color:#A9BBD8;margin-top:12px;max-width:700px;font-size:14.5px;line-height:1.8}
.crumb{display:flex;align-items:center;gap:7px;font-size:12.5px;color:#8FA3C4;margin-bottom:14px}
.crumb a:hover{color:#fff}
.crumb i{color:#3B4A66;font-style:normal}

/* ---------------- 正文排版 ---------------- */
.prose{max-width:860px}
.prose h2{font-size:22px;margin:34px 0 12px;padding-left:14px;border-left:3px solid var(--brand);line-height:1.4}
.prose h3{font-size:16.5px;margin:24px 0 9px}
.prose p{margin-bottom:13px;line-height:1.9;font-size:15px}
.prose ul,.prose ol{margin:0 0 14px 22px;display:grid;gap:7px;color:var(--body);font-size:14.8px}
.prose li::marker{color:var(--brand);font-weight:800}
.prose blockquote{
  margin:16px 0;padding:14px 18px;border-left:3px solid var(--mint);
  background:var(--bg-3);border-radius:0 10px 10px 0;color:var(--ink-2);font-size:14.5px;
}
.prose strong{color:var(--ink);font-weight:800}
.prose a{color:var(--brand);font-weight:650;border-bottom:1px solid rgba(43,89,255,.3)}
.prose a:hover{border-bottom-color:var(--brand)}
.prose table{width:100%;border-collapse:collapse;margin:16px 0;font-size:14px}
.prose th,.prose td{padding:10px 13px;border:1px solid var(--line);text-align:left}
.prose th{background:var(--bg-3);font-weight:750;color:var(--ink)}

/* ---------------- 侧栏布局 ---------------- */
.two-col{display:grid;grid-template-columns:1fr 320px;gap:40px;align-items:start}
.side-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:22px;
  position:sticky;top:calc(var(--nav-h) + 18px);
}
.side-card h3{font-size:15px;margin-bottom:6px}
.side-card .sc-sub{font-size:12.5px;color:var(--muted);margin-bottom:16px}
.sc-row{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:9px 0;border-bottom:1px dashed var(--line);font-size:13.2px}
.sc-row:last-of-type{border-bottom:0}
.sc-row span{color:var(--muted)}
.sc-row b{color:var(--ink);font-weight:750}
.sc-btn{display:flex;align-items:center;justify-content:center;height:44px;border-radius:11px;background:var(--brand);color:#fff;font-weight:750;font-size:14px;margin-top:16px;box-shadow:var(--sh-brand)}
.sc-btn:hover{background:var(--brand-d)}
.sc-btn.ghost{background:#fff;color:var(--ink);border:1.5px solid var(--line);box-shadow:none}
.sc-btn.ghost:hover{border-color:#C7D4EC;color:var(--brand)}

/* ---------------- 页脚 ---------------- */
footer.site{background:var(--ink);color:#93A6C4;padding:56px 0 0;margin-top:0}
.foot-top{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:40px}
.f-brand .brand-txt b{color:#fff}
.f-brand .brand-txt small{color:#6D82A3}
.f-brand p{margin-top:16px;font-size:13.2px;line-height:1.85;color:#8FA3C4;max-width:330px}
.f-brand .f-code{
  display:inline-flex;align-items:center;gap:10px;margin-top:18px;padding:9px 14px;border-radius:10px;
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12);font-size:12.5px;color:#A9BBD8;
}
.f-brand .f-code b{color:#fff;font-weight:850;letter-spacing:.10em;font-size:15px}
.f-col h4{color:#fff;font-size:13.5px;font-weight:800;margin-bottom:16px;letter-spacing:.02em}
.f-col a,.f-col span{display:block;font-size:13.2px;color:#93A6C4;padding:5px 0;transition:color .16s}
.f-col a:hover{color:#fff}
.f-bottom{
  border-top:1px solid rgba(255,255,255,.09);padding:20px 0 26px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:12.5px;color:#6D82A3;
}
.f-bottom .fb-l{display:flex;flex-wrap:wrap;gap:14px}
.f-bottom a:hover{color:#fff}
.disclaimer{font-size:11.5px;color:#5A6C8A;line-height:1.7;margin-top:8px}

/* ---------------- 返回顶部 ---------------- */
.to-top{
  position:fixed;right:22px;bottom:26px;width:44px;height:44px;border-radius:12px;
  background:#fff;border:1px solid var(--line);box-shadow:var(--sh);
  display:flex;align-items:center;justify-content:center;color:var(--ink);
  opacity:0;visibility:hidden;transform:translateY(10px);transition:all .24s;z-index:200;
}
.to-top.show{opacity:1;visibility:visible;transform:none}
.to-top:hover{color:var(--brand);border-color:#C7D4EC}

/* ---------------- 响应式 ---------------- */
@media(max-width:1080px){
  .feat-grid{grid-template-columns:repeat(2,1fr)}
  .plan-grid{grid-template-columns:repeat(3,1fr)}
  .art-grid{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(3,1fr)}
  .steps.cols4{grid-template-columns:repeat(4,1fr)}
  .step::after{display:none}
  .two-col{grid-template-columns:1fr}
  .side-card{position:static}
  .foot-top{grid-template-columns:1.4fr 1fr 1fr;gap:30px}
  .f-col.f-contact{grid-column:1/-1}
}
@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-2)}
  .fs-item:nth-child(2n){border-left:1px solid var(--line-2)}
  .fs-item:nth-child(1),.fs-item:nth-child(2){border-top:0}
  .hero-inner{grid-template-columns:1fr;gap:40px}
  .hero{padding:52px 0 60px}
  .invite-card{max-width:440px}
  .navlinks{
    position:fixed;inset:calc(var(--nav-h) + 34px) 0 auto 0;z-index:290;
    flex-direction:column;align-items:stretch;gap:2px;margin:0;padding:14px 18px 22px;
    background:#fff;border-bottom:1px solid var(--line);box-shadow:var(--sh-lg);
    transform:translateY(-12px);opacity:0;visibility:hidden;transition:all .22s;
  }
  .navlinks.open{transform:none;opacity:1;visibility:visible}
  .navlinks a{padding:12px 12px;font-size:15px}
  .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}
}
@media(max-width:760px){
  .flow-strip{grid-template-columns:1fr}
  .fs-item+.fs-item{border-left:0;border-top:1px solid var(--line-2)}
  .fs-item:nth-child(2){border-top:1px solid var(--line-2)}
  .plan-grid{grid-template-columns:repeat(2,1fr)}
  .feat-grid{grid-template-columns:1fr}
  .art-grid{grid-template-columns:1fr}
  .steps{grid-template-columns:repeat(2,1fr)}
  .steps.cols4{grid-template-columns:repeat(2,1fr)}
  .section{padding:48px 0}
  .section.tight{padding:40px 0}
  .head{margin-bottom:26px}
  .search-box{margin-left:0;width:100%}
  .cta{padding:34px 22px}
  .hero-nums{gap:18px}
  .hero-nums b{font-size:21px}
  .foot-top{grid-template-columns:1fr 1fr;gap:26px 18px;padding-bottom:28px}
  .f-brand{grid-column:1/-1}
  .f-brand p{max-width:none}
  .f-col h4{margin-bottom:10px}
  .f-bottom{padding:18px 0 24px}

  /* 宽带表格 -> 卡片式，消除横向压缩 */
  .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:800}
  table.bb td:nth-child(5){position:absolute;top:13px;right:16px;font-size:14px;font-weight:850;color:var(--brand)}
  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-radius:5px;background:var(--bg-3);
    color:var(--muted);font-size:11.5px;line-height:1.7;
  }
  .tbl-more{padding:12px}
}
@media(max-width:520px){
  .plan-grid{grid-template-columns:repeat(2,1fr);gap:10px}
  .plan{padding:15px 13px 13px;border-radius:14px}
  .plan:hover{transform:none;box-shadow:none;border-color:var(--line)}
  .plan.hot:hover{border-color:rgba(43,89,255,.34)}
  .plan-top{gap:6px;margin-bottom:8px}
  .op-badge{height:20px;padding:0 7px;font-size:10.5px;border-radius:5px}
  .plan-flag{font-size:9.5px;padding:1px 5px}
  .plan h3{font-size:13.5px;margin-bottom:8px;line-height:1.35}
  .plan-flow b{font-size:21px}
  .plan-flow span{font-size:11px}
  .plan-price{font-size:11.5px;margin-bottom:10px}
  .plan-price b{font-size:14px}
  .plan-specs{gap:4px;padding-top:9px;margin-bottom:10px}
  .plan-specs div{font-size:11px}
  .plan-go{height:34px;font-size:12px;border-radius:8px}
  .steps,.steps.cols4{grid-template-columns:1fr}
  .btn-lg{height:50px;padding:0 22px;font-size:14.5px}
  .hero-nums{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:26px}
  .hero-nums div{min-width:0}
  .hero-nums b{font-size:18px}
  .hero-nums span{font-size:10.5px;line-height:1.45}
  .ic-code{font-size:38px}
  .art{padding:18px 16px}
  .art h3{font-size:14.5px}
}