:root{
  --navy:#16263f;
  --navy-2:#1f3a5f;
  --gold:#c2a35a;
  --gold-soft:#e7d8b0;
  --ink:#1f2933;
  --muted:#6b7686;
  --line:#e8ebf0;
  --bg:#ffffff;
  --bg-alt:#f6f8fb;
  --radius:14px;
  --shadow:0 12px 32px rgba(22,38,63,.10);
  --shadow-sm:0 4px 14px rgba(22,38,63,.08);
  --maxw:1120px;
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font);
  color:var(--ink);
  background:var(--bg);
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 20px}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:999px;font-size:15px;font-weight:600;
  border:1px solid transparent;cursor:pointer;transition:.2s ease;white-space:nowrap;
}
.btn--primary{background:var(--gold);color:#2a2208;box-shadow:var(--shadow-sm)}
.btn--primary:hover{background:#b3913f;transform:translateY(-1px)}
.btn--ghost{background:transparent;color:var(--navy);border-color:var(--navy)}
.btn--ghost:hover{background:var(--navy);color:#fff}
.btn--block{width:100%}

.eyebrow{color:var(--gold);font-size:13px;letter-spacing:.18em;font-weight:700;text-transform:uppercase;margin-bottom:10px}

/* 导航 */
.nav{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.9);backdrop-filter:saturate(180%) blur(12px);border-bottom:1px solid var(--line)}
.nav__inner{display:flex;align-items:center;justify-content:space-between;height:66px}
.brand{display:flex;align-items:center;gap:10px;color:var(--navy);font-weight:800;font-size:18px}
.brand__mark{color:var(--gold);display:flex}
.brand__text{display:flex;flex-direction:column;line-height:1.1}
.brand__text small{font-size:11px;font-weight:600;color:var(--muted);letter-spacing:.05em}
.nav__links{display:flex;gap:28px}
.nav__links a{color:var(--navy);font-size:15px;font-weight:500;position:relative;padding:4px 0}
.nav__links a:hover{color:var(--gold)}
.nav__cta{padding:9px 18px;font-size:14px}
.nav__toggle{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px}
.nav__toggle span{width:22px;height:2px;background:var(--navy);border-radius:2px;transition:.2s}

/* Hero */
.hero{background:linear-gradient(135deg,var(--navy) 0%,var(--navy-2) 100%);color:#fff;padding:72px 0 80px;overflow:hidden}
.hero__inner{display:grid;grid-template-columns:1.2fr .8fr;gap:48px;align-items:center}
.hero .eyebrow{color:var(--gold-soft)}
.hero h1{font-size:clamp(30px,5vw,48px);line-height:1.18;font-weight:800;margin-bottom:18px}
.hero__lead{color:#d8e0ec;font-size:17px;max-width:540px;margin-bottom:26px}
.hero__lead strong{color:#fff}
.hero__actions{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:28px}
.hero__actions .btn--ghost{color:#fff;border-color:rgba(255,255,255,.5)}
.hero__actions .btn--ghost:hover{background:#fff;color:var(--navy)}
.hero__points{list-style:none;display:flex;gap:18px;flex-wrap:wrap;color:#cdd7e4;font-size:14px}
.hero__points li{display:flex;align-items:center;gap:8px}
.hero__points li::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--gold)}
.hero__card{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);border-radius:var(--radius);padding:26px;backdrop-filter:blur(4px)}
.hero__card-row{display:flex;justify-content:space-between;align-items:center;padding:16px 4px;border-bottom:1px solid rgba(255,255,255,.1)}
.hero__card-row:last-child{border-bottom:0}
.hero__card-row span{color:#dde4ee;font-size:15px}
.hero__card-row b{color:var(--gold-soft);font-size:15px}

/* 区块 */
.section{padding:72px 0}
.section--alt{background:var(--bg-alt)}
.section__head{text-align:center;max-width:680px;margin:0 auto 44px}
.section__head h2{font-size:clamp(24px,3.6vw,34px);font-weight:800;color:var(--navy)}
.section__sub{color:var(--muted);margin-top:12px;font-size:16px}

/* 网格 */
.grid{display:grid;gap:22px}
.grid--3{grid-template-columns:repeat(3,1fr)}
.grid--4{grid-template-columns:repeat(4,1fr)}

/* 卡片 */
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow-sm);transition:.2s}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--gold-soft)}
.card__icon{font-size:30px;margin-bottom:14px}
.card h3{font-size:19px;color:var(--navy);margin-bottom:10px}
.card p{color:var(--muted);font-size:15px}
.card__list{list-style:none;margin-top:16px;display:grid;gap:8px}
.card__list li{position:relative;padding-left:20px;font-size:14px;color:var(--ink)}
.card__list li::before{content:"";position:absolute;left:0;top:9px;width:8px;height:8px;border-radius:2px;background:var(--gold)}

/* 步骤 */
.step{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;position:relative}
.step__num{font-size:30px;font-weight:800;color:var(--gold-soft);display:block;margin-bottom:8px}
.step h4{color:var(--navy);font-size:17px;margin-bottom:6px}
.step p{color:var(--muted);font-size:14px}

/* 联系 / 表单 */
.contact{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:start}
.contact__info{list-style:none;margin-top:24px;display:grid;gap:12px}
.contact__info li{display:flex;align-items:center;gap:10px;color:var(--ink);font-size:15px}
.contact__info span{font-size:18px}
.form{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow-sm)}
.form__row{margin-bottom:16px}
.form__row label{display:block;font-size:14px;font-weight:600;color:var(--navy);margin-bottom:7px}
.form__row label i{color:#d9534f;font-style:normal}
.form input,.form select,.form textarea{
  width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:10px;
  font-size:15px;font-family:inherit;color:var(--ink);background:#fcfdff;transition:.15s;
}
.form input:focus,.form select:focus,.form textarea:focus{outline:0;border-color:var(--gold);box-shadow:0 0 0 3px rgba(194,163,90,.15)}
.form textarea{resize:vertical}
.form__err{color:#d9534f;font-size:13px;min-height:16px;display:block;margin-top:5px}
.form__note{color:var(--muted);font-size:12px;text-align:center;margin-top:12px}
.form.is-sent{border-color:var(--gold)}
.form__success{display:none;text-align:center;padding:14px 0 4px;color:var(--navy)}
.form.is-sent .form__success{display:block}
.form.is-sent .form__row,.form.is-sent button{display:none}

/* 关于 */
.about{display:grid;grid-template-columns:1.3fr .7fr;gap:48px;align-items:center}
.about__text h2{font-size:clamp(24px,3.6vw,32px);color:var(--navy);margin-bottom:14px}
.about__text p{color:var(--muted);margin-bottom:12px}
.about__text strong{color:var(--ink)}
.about__stats{display:grid;gap:16px}
.about__stats div{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:20px;text-align:center;box-shadow:var(--shadow-sm)}
.about__stats b{display:block;font-size:26px;color:var(--gold);font-weight:800}
.about__stats span{font-size:14px;color:var(--muted)}

/* 页脚 */
.footer{background:var(--navy);color:#cfd8e4;padding:34px 0}
.footer__inner{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap}
.footer__brand{font-size:18px;font-weight:800;color:#fff}
.footer__sub{font-size:13px;color:#9fb0c4;margin-top:4px}
.footer__copy{font-size:13px;color:#9fb0c4}

/* 在线客服 */
.chat{position:fixed;right:20px;bottom:20px;z-index:60;display:flex;flex-direction:column;align-items:flex-end}
.chat__bubble{
  display:inline-flex;align-items:center;gap:8px;background:var(--navy);color:#fff;
  border:0;border-radius:999px;padding:13px 20px;font-size:15px;font-weight:600;
  cursor:pointer;box-shadow:var(--shadow);transition:.2s;
}
.chat__bubble:hover{transform:translateY(-2px);background:var(--navy-2)}
.chat__bubble-icon{font-size:18px}
.chat__panel{
  width:340px;max-width:calc(100vw - 32px);height:480px;max-height:calc(100vh - 120px);
  background:#fff;border-radius:16px;box-shadow:var(--shadow);overflow:hidden;
  display:flex;flex-direction:column;margin-bottom:14px;
  transform:translateY(16px) scale(.98);opacity:0;pointer-events:none;transition:.22s ease;
}
.chat.open .chat__panel{transform:none;opacity:1;pointer-events:auto}
.chat__head{background:linear-gradient(135deg,var(--navy),var(--navy-2));color:#fff;padding:14px 16px;display:flex;align-items:center;justify-content:space-between}
.chat__title{display:flex;align-items:center;gap:10px}
.chat__avatar{width:34px;height:34px;border-radius:50%;background:var(--gold);color:#2a2208;display:flex;align-items:center;justify-content:center;font-weight:800}
.chat__title small{display:block;color:#bcd0e6;font-size:12px}
.chat__close{background:none;border:0;color:#fff;font-size:22px;line-height:1;cursor:pointer;opacity:.8}
.chat__close:hover{opacity:1}
.chat__body{flex:1;overflow-y:auto;padding:16px;display:flex;flex-direction:column;gap:12px;background:var(--bg-alt)}
.msg{max-width:85%;padding:10px 13px;border-radius:14px;font-size:14px;line-height:1.55;word-break:break-word}
.msg--bot{align-self:flex-start;background:#fff;border:1px solid var(--line);border-bottom-left-radius:4px}
.msg--user{align-self:flex-end;background:var(--navy);color:#fff;border-bottom-right-radius:4px}
.msg small{display:block;font-size:12px;opacity:.6;margin-top:4px}
.chat__quick{display:flex;flex-wrap:wrap;gap:8px;padding:10px 12px;border-top:1px solid var(--line);background:#fff}
.chip{background:var(--bg-alt);border:1px solid var(--line);color:var(--navy);font-size:13px;padding:7px 12px;border-radius:999px;cursor:pointer;transition:.15s}
.chip:hover{background:var(--gold-soft);border-color:var(--gold)}
.chat__input{display:flex;gap:8px;padding:12px;border-top:1px solid var(--line);background:#fff}
.chat__input input{flex:1;border:1px solid var(--line);border-radius:10px;padding:10px 12px;font-size:14px;font-family:inherit}
.chat__input input:focus{outline:0;border-color:var(--gold)}
.chat__input button{background:var(--gold);color:#2a2208;border:0;border-radius:10px;padding:0 16px;font-weight:700;cursor:pointer}
.chat__input button:hover{background:#b3913f}

/* 响应式 */
@media (max-width:900px){
  .hero__inner{grid-template-columns:1fr;gap:32px}
  .hero__card{order:-1}
  .grid--3,.grid--4{grid-template-columns:1fr 1fr}
  .contact,.about{grid-template-columns:1fr;gap:32px}
}
@media (max-width:680px){
  .nav__links,.nav__cta{display:none}
  .nav__toggle{display:flex}
  .nav__links.show{display:flex;position:absolute;top:66px;left:0;right:0;flex-direction:column;gap:0;background:#fff;border-bottom:1px solid var(--line);padding:8px 20px 16px}
  .nav__links.show a{padding:12px 0;border-bottom:1px solid var(--line)}
  .section{padding:54px 0}
  .grid--3,.grid--4{grid-template-columns:1fr}
  .hero{padding:48px 0 56px}
  .chat{right:12px;bottom:12px}
  .chat__panel{height:70vh}
}