:root{
  --navy:#0F1B2E; --navy-2:#16263F; --gold:#C89B3C; --gold-2:#E0B85C;
  --cream:#FAF8F4; --ink:#16202E; --ink-2:#48566A; --muted:#78879B;
  --line:#E3E0D8; --white:#fff;
  --r:14px; --shadow:0 1px 2px rgba(15,27,46,.05),0 12px 36px rgba(15,27,46,.07);
  color-scheme:light;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--cream);color:var(--ink);
  font-family:"Noto Sans SC","Inter","PingFang SC",-apple-system,system-ui,sans-serif;
  font-size:16px;line-height:1.75;-webkit-font-smoothing:antialiased}
body.en{font-family:"Inter","Noto Sans SC",-apple-system,system-ui,sans-serif}
h1,h2,h3{margin:0;font-weight:700;letter-spacing:-.01em;text-wrap:balance;line-height:1.3}
p{margin:0}
a{color:inherit;text-decoration:none}
img{max-width:100%}
.wrap{width:min(1120px,100% - 40px);margin-inline:auto}
.sec{padding:84px 0}
@media(max-width:760px){.sec{padding:56px 0}.wrap{width:min(1120px,100% - 32px)}}

/* header */
header{position:sticky;top:0;z-index:50;background:rgba(250,248,244,.86);
  backdrop-filter:saturate(180%) blur(14px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;gap:26px;height:66px}
.logo{font-family:Georgia,"Times New Roman",serif;font-size:21px;font-weight:700;letter-spacing:.02em;color:var(--navy)}
.logo i{color:var(--gold);font-style:normal}
.nav .links{display:flex;gap:24px;margin-left:auto;font-size:14.5px;color:var(--ink-2)}
.nav .links a:hover{color:var(--navy)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 20px;border-radius:999px;font-size:14.5px;font-weight:500;cursor:pointer;
  border:1px solid transparent;transition:.18s;white-space:nowrap}
.btn.p{background:var(--navy);color:#fff}
.btn.p:hover{background:var(--navy-2);transform:translateY(-1px)}
.btn.g{background:var(--gold);color:#1a1205;font-weight:600}
.btn.g:hover{background:var(--gold-2);transform:translateY(-1px)}
.btn.o{border-color:var(--line);color:var(--ink);background:#fff}
.btn.o:hover{border-color:var(--navy)}
.btn.sm{padding:8px 15px;font-size:13.5px}
.lang{border:1px solid var(--line);background:#fff;border-radius:999px;padding:6px 13px;
  font-size:13px;color:var(--ink-2);cursor:pointer;font-family:inherit}
.lang:hover{border-color:var(--navy);color:var(--navy)}
.burger{display:none;background:none;border:0;padding:8px;cursor:pointer;margin-left:auto}
.burger span{display:block;width:22px;height:2px;background:var(--navy);margin:4px 0;border-radius:2px;transition:.2s}
@media(max-width:860px){
  .nav .links{display:none}
  .burger{display:block}
  .nav .btn.p{display:none}
  .mob{display:none;flex-direction:column;gap:2px;padding:10px 0 20px;border-top:1px solid var(--line)}
  .mob.on{display:flex}
  .mob a{padding:11px 2px;color:var(--ink-2);font-size:15.5px;border-bottom:1px solid var(--line)}
  .mob .btn{margin-top:14px}
}
@media(min-width:861px){.mob{display:none!important}}

/* hero */
.hero{background:linear-gradient(160deg,var(--navy) 0%,#132644 58%,#1B3457 100%);color:#fff;
  padding:96px 0 104px;position:relative;overflow:hidden}
.hero::after{content:"";position:absolute;right:-180px;top:-140px;width:620px;height:620px;border-radius:50%;
  background:radial-gradient(circle,rgba(200,155,60,.20),transparent 68%)}
.hero .wrap{position:relative;z-index:1}
.eyebrow{display:inline-flex;align-items:center;gap:9px;font-size:13px;letter-spacing:.09em;
  text-transform:uppercase;color:var(--gold-2);margin-bottom:22px;font-weight:600}
.eyebrow::before{content:"";width:26px;height:1.5px;background:var(--gold)}
.hero h1{font-size:clamp(30px,5.2vw,52px);line-height:1.22;max-width:19ch}
.hero .sub{margin-top:22px;font-size:clamp(16px,2.1vw,19px);color:#C3CEDE;max-width:52ch;line-height:1.75}
.hero .cta{display:flex;gap:13px;flex-wrap:wrap;margin-top:34px}
.stats{display:flex;gap:42px;flex-wrap:wrap;margin-top:54px;padding-top:30px;border-top:1px solid rgba(255,255,255,.14)}
.stats div b{display:block;font-size:26px;color:var(--gold-2);font-weight:700;line-height:1.2}
.stats div span{font-size:13.5px;color:#93A3B8}

/* generic */
.head{max-width:62ch;margin-bottom:40px}
.tag{display:inline-block;font-size:12.5px;letter-spacing:.09em;text-transform:uppercase;
  color:var(--gold);font-weight:700;margin-bottom:12px}
.head h2{font-size:clamp(24px,3.6vw,34px)}
.head p{margin-top:14px;color:var(--ink-2);font-size:16.5px}
.grid{display:grid;gap:20px}
.g3{grid-template-columns:repeat(auto-fit,minmax(290px,1fr))}
.g2{grid-template-columns:repeat(auto-fit,minmax(340px,1fr))}
@media(min-width:900px){.g2{grid-template-columns:1fr 1fr}}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:30px 28px;
  transition:.22s;position:relative}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:#D6D1C5}
.card .ico{width:44px;height:44px;border-radius:11px;background:var(--navy);display:grid;place-items:center;
  margin-bottom:18px}
.card .ico svg{width:21px;height:21px;stroke:var(--gold-2);fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.card h3{font-size:19px;margin-bottom:10px}
.card p{color:var(--ink-2);font-size:15px}
.card ul{margin:15px 0 0;padding:0;list-style:none}
.card li{position:relative;padding-left:19px;font-size:14.5px;color:var(--ink-2);margin-top:8px}
.card li::before{content:"";position:absolute;left:0;top:10px;width:6px;height:6px;border-radius:50%;background:var(--gold)}

/* pricing */
.price{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:32px 28px;display:flex;flex-direction:column}
.price.hot{border:1.5px solid var(--navy);box-shadow:var(--shadow)}
.price .badge{position:absolute;top:-12px;left:28px;background:var(--gold);color:#1a1205;
  font-size:12px;font-weight:700;padding:4px 13px;border-radius:999px}
.price h3{font-size:20px}
.price .who{color:var(--muted);font-size:14px;margin-top:6px;min-height:42px}
.price .amt{font-size:33px;font-weight:700;color:var(--navy);margin:20px 0 4px;letter-spacing:-.02em}
.price .amt small{font-size:14px;color:var(--muted);font-weight:500;letter-spacing:0}
.price .amt .cur{font-size:18px;vertical-align:top;margin-right:2px}
.price ul{margin:20px 0 26px;padding:0;list-style:none;flex:1}
.price li{position:relative;padding-left:26px;font-size:14.5px;color:var(--ink-2);margin-top:11px;line-height:1.6}
.price li::before{content:"";position:absolute;left:0;top:7px;width:14px;height:8px;
  border-left:2px solid var(--gold);border-bottom:2px solid var(--gold);transform:rotate(-45deg)}

/* steps */
.steps{counter-reset:s;display:grid;gap:18px;grid-template-columns:repeat(auto-fit,minmax(250px,1fr))}
.step{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:28px 26px;position:relative}
.step::before{counter-increment:s;content:"0" counter(s);font-family:Georgia,serif;font-size:34px;
  color:var(--gold);opacity:.32;font-weight:700;display:block;margin-bottom:10px;line-height:1}
.step h3{font-size:17px;margin-bottom:8px}
.step p{color:var(--ink-2);font-size:14.5px}

/* dark band */
.band{background:var(--navy);color:#fff}
.band .head h2{color:#fff}
.band .head p{color:#B4C1D3}
.band .card{background:rgba(255,255,255,.045);border-color:rgba(255,255,255,.12)}
.band .card:hover{background:rgba(255,255,255,.075);border-color:rgba(200,155,60,.4);box-shadow:none}
.band .card h3{color:#fff}
.band .card p,.band .card li{color:#B4C1D3}
.band .card .ico{background:rgba(200,155,60,.16)}

/* principles */
.pri{display:grid;gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--r);overflow:hidden}
.pri > div{background:#fff;padding:26px 28px}
.pri h3{font-size:16.5px;margin-bottom:8px;display:flex;align-items:center;gap:9px}
.pri h3::before{content:"";width:7px;height:7px;background:var(--gold);border-radius:50%;flex:none}
.pri p{color:var(--ink-2);font-size:14.5px}
@media(min-width:760px){.pri{grid-template-columns:1fr 1fr}}

/* faq */
details.faq{background:#fff;border:1px solid var(--line);border-radius:var(--r);margin-bottom:12px;overflow:hidden}
details.faq summary{padding:20px 26px;cursor:pointer;font-weight:500;font-size:16px;list-style:none;
  display:flex;align-items:center;gap:14px;transition:.15s}
details.faq summary::-webkit-details-marker{display:none}
details.faq summary::after{content:"+";margin-left:auto;font-size:21px;color:var(--gold);font-weight:400;flex:none}
details.faq[open] summary::after{content:"−"}
details.faq summary:hover{background:#FCFBF8}
details.faq .body{padding:0 26px 22px;color:var(--ink-2);font-size:15px}

/* contact */
.contact{background:linear-gradient(160deg,var(--navy),#16304F);color:#fff;border-radius:20px;
  padding:56px 48px;text-align:center}
.contact h2{font-size:clamp(24px,3.6vw,33px)}
.contact p{color:#B4C1D3;margin-top:16px;max-width:54ch;margin-inline:auto}
.contact .cta{display:flex;gap:13px;justify-content:center;flex-wrap:wrap;margin-top:32px}
.contact .meta{margin-top:30px;padding-top:24px;border-top:1px solid rgba(255,255,255,.14);
  font-size:14px;color:#93A3B8}
@media(max-width:600px){.contact{padding:40px 24px;border-radius:16px}}

footer{padding:40px 0;border-top:1px solid var(--line);margin-top:70px}
.foot{display:flex;gap:18px;flex-wrap:wrap;align-items:center;color:var(--muted);font-size:13.5px}
.foot .logo{font-size:17px}

/* float */
.fab{position:fixed;right:18px;bottom:18px;z-index:60;width:54px;height:54px;border-radius:50%;
  background:#25D366;display:grid;place-items:center;box-shadow:0 6px 22px rgba(37,211,102,.4);transition:.2s}
.fab:hover{transform:scale(1.07)}
.fab svg{width:28px;height:28px;fill:#fff}

.rv{opacity:0;transform:translateY(16px)}
.rv.in{opacity:1;transform:none;transition:opacity .6s ease,transform .6s ease}
@media(prefers-reduced-motion:reduce){.rv{opacity:1;transform:none}}

/* ── 内页补充 ── */
.crumb{font-size:13.5px;color:var(--muted);padding:22px 0 0}
.crumb a:hover{color:var(--navy)}
.crumb span{margin:0 7px;opacity:.5}
.phero{padding:46px 0 10px}
.phero h1{font-size:clamp(34px,5vw,54px);line-height:1.18;max-width:17ch}
.phero .lede{margin-top:20px;font-size:clamp(16.5px,2vw,19px);color:var(--ink-2);max-width:62ch;line-height:1.75}
.prose{max-width:70ch}
.prose h2{font-size:clamp(23px,3vw,31px);margin:46px 0 14px}
.prose h3{font-size:19px;margin:30px 0 8px}
.prose p{margin:0 0 14px;color:var(--ink-2)}
.prose ul{margin:0 0 16px;padding-left:20px;color:var(--ink-2)}
.prose li{margin:0 0 7px}
.prose strong{color:var(--ink)}
.split{display:grid;gap:34px;grid-template-columns:minmax(0,1.45fr) minmax(0,1fr);align-items:start}
@media(max-width:860px){.split{grid-template-columns:1fr}}
.aside{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:26px;position:sticky;top:90px}
@media(max-width:860px){.aside{position:static}}
.aside h3{font-size:16.5px;margin:0 0 12px}
.aside ul{margin:0 0 18px;padding-left:18px;font-size:14.5px;color:var(--ink-2)}
.aside li{margin:0 0 6px}
table.tbl{width:100%;border-collapse:collapse;font-size:14.5px;margin:6px 0 18px}
table.tbl th,table.tbl td{border:1px solid var(--line);padding:11px 13px;text-align:left;vertical-align:top}
table.tbl th{background:var(--navy);color:#fff;font-weight:600;font-size:13.5px}
table.tbl tr:nth-child(even) td{background:#fff}
.tw{overflow-x:auto;-webkit-overflow-scrolling:touch}
.note{background:#fff;border-left:4px solid var(--gold);border-radius:0 10px 10px 0;padding:18px 22px;margin:20px 0;font-size:15px;color:var(--ink-2)}
.note b{color:var(--ink)}
.next{display:grid;gap:16px;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));margin-top:14px}
.next a{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:22px 24px;transition:.2s;display:block}
.next a:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:#D6D1C5}
.next b{display:block;font-size:17px;margin-bottom:5px}
.next span{font-size:14px;color:var(--ink-2)}
.nav .links a.on{color:var(--navy);font-weight:600}
.prose,.split>*{min-width:0}
.tw{max-width:100%}