/* ============================================================
   云帆出海 GlobalSail — 营销官网样式
   设计系统：科技蓝(主色) + 青色(科技点缀)
   ============================================================ */

:root{
  --navy:#0a1830;
  --navy-2:#0e2347;
  --blue:#1f5fd6;
  --blue-2:#2f7bff;
  --cyan:#22d3ee;
  --cyan-2:#38bdf8;
  --orange:#2f7bff;        /* 兼容旧引用，统一为科技蓝 */
  --orange-2:#38bdf8;      /* 兼容旧引用，统一为青色 */
  --ink:#0b1a30;
  --text:#33415c;
  --muted:#6b7891;
  --line:#e3e9f3;
  --bg:#ffffff;
  --bg-alt:#f4f8fe;
  --white:#fff;
  --radius:16px;
  --radius-sm:10px;
  --shadow:0 10px 30px rgba(13,31,58,.08);
  --shadow-lg:0 24px 60px rgba(13,31,58,.16);
  --maxw:1180px;
  --grad:linear-gradient(120deg,var(--blue-2),var(--cyan));
  --grad-blue:linear-gradient(120deg,var(--blue),var(--blue-2));
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  color:var(--text);
  background:var(--bg);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
h1,h2,h3,h4{color:var(--ink);line-height:1.25;font-weight:800}

.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 22px}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:999px;font-weight:700;font-size:15px;
  cursor:pointer;border:1.5px solid transparent;transition:.25s;white-space:nowrap;
}
.btn--lg{padding:15px 30px;font-size:16px}
.btn--block{width:100%}
.btn--primary{background:var(--grad);color:#fff;box-shadow:0 10px 24px rgba(47,123,255,.35)}
.btn--primary:hover{transform:translateY(-2px);box-shadow:0 16px 34px rgba(47,123,255,.45)}
.btn--ghost{background:rgba(255,255,255,.12);color:#fff;border-color:rgba(255,255,255,.5)}
.btn--ghost:hover{background:rgba(255,255,255,.22)}
.btn--light{background:#fff;color:var(--navy)}
.btn--light:hover{transform:translateY(-2px);box-shadow:0 14px 34px rgba(0,0,0,.2)}

/* ---------- 顶部条 ---------- */
.topbar{background:var(--navy);color:#cdd8ea;font-size:13px}
.topbar__inner{display:flex;justify-content:space-between;align-items:center;height:40px}
.topbar__left{display:flex;gap:20px;flex-wrap:wrap}
.topbar__right a{color:var(--orange-2);font-weight:600}
.topbar__right a:hover{text-decoration:underline}

/* ---------- 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);
  transition:.3s}
.nav.scrolled{box-shadow:var(--shadow)}
.nav__inner{display:flex;align-items:center;justify-content:space-between;height:88px}
.nav__logo{display:flex;align-items:center;gap:10px;font-weight:800;color:var(--navy)}
.nav__logo-mark{font-size:24px}
.nav__logo-text{display:flex;flex-direction:column;line-height:1;font-size:19px}
.nav__logo-text small{font-size:11px;font-weight:600;color:var(--muted);letter-spacing:1px}
.nav__links{display:flex;gap:26px;align-items:center}
.nav__links > a,.nav__item > a{font-weight:600;color:var(--text);position:relative;padding:6px 0}
.nav__links > a::after,.nav__item > a::after{content:"";position:absolute;left:0;bottom:0;width:0;height:2px;background:var(--grad);transition:.25s}
.nav__links > a:hover,.nav__item > a:hover{color:var(--navy)}
.nav__links > a:hover::after,.nav__item > a:hover::after{width:100%}
.nav__cta{margin-left:14px}
.nav__toggle{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px}
.nav__toggle span{width:24px;height:2.5px;background:var(--navy);border-radius:2px;transition:.3s}

/* ---------- 导航下拉（核心服务） ---------- */
.nav__item{position:relative}
.caret{display:inline-block;font-size:11px;transition:transform .25s;margin-left:2px}
.has-dropdown:hover .caret{transform:rotate(180deg)}
.dropdown{position:absolute;top:100%;left:0;min-width:248px;list-style:none;
  background:#fff;border:1px solid var(--line);border-radius:14px;padding:8px;
  box-shadow:var(--shadow-lg);opacity:0;visibility:hidden;transform:translateY(10px);
  transition:.22s;z-index:60}
.has-dropdown:hover .dropdown{opacity:1;visibility:visible;transform:translateY(6px)}
.dropdown li a{display:flex;align-items:center;gap:8px;padding:11px 14px;border-radius:9px;
  font-size:14px;font-weight:600;color:var(--text);transition:.18s}
.dropdown li a:hover{background:var(--bg-alt);color:var(--blue-2)}
.card{scroll-margin-top:90px}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;background:var(--navy);color:#fff}
.hero__bg{position:absolute;inset:0;
  background:
    radial-gradient(900px 520px at 82% -12%,rgba(56,189,248,.34),transparent 60%),
    radial-gradient(760px 540px at 6% 116%,rgba(47,123,255,.34),transparent 60%),
    linear-gradient(160deg,var(--navy),#07142b);}
.hero__bg::before{content:"";position:absolute;inset:0;
  background-image:
    linear-gradient(rgba(120,180,255,.06) 1px,transparent 1px),
    linear-gradient(90deg,rgba(120,180,255,.06) 1px,transparent 1px);
  background-size:48px 48px;
  -webkit-mask-image:radial-gradient(circle at 50% 28%,#000,transparent 78%);
  mask-image:radial-gradient(circle at 50% 28%,#000,transparent 78%);}
.hero__inner{position:relative;display:grid;grid-template-columns:1.1fr .9fr;gap:40px;
  align-items:center;padding:70px 22px 110px}
.badge{display:inline-block;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.25);
  padding:7px 14px;border-radius:999px;font-size:13px;font-weight:600;margin-bottom:18px}
.hero__title{font-size:clamp(34px,5vw,56px);font-weight:900;letter-spacing:.5px}
.grad{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero__sub{margin:20px 0 28px;color:#d4dded;font-size:17px;max-width:560px}
.hero__actions{display:flex;gap:14px;flex-wrap:wrap}
.hero__trust{display:flex;gap:26px;align-items:center;margin-top:34px;flex-wrap:wrap;
  color:#aebbd2;font-size:14px}
.hero__trust strong{color:#fff;font-size:22px;margin-left:6px}

.hero__panel{display:flex;justify-content:center}
.glasscard{width:100%;max-width:380px;background:rgba(255,255,255,.1);
  border:1px solid rgba(255,255,255,.2);border-radius:20px;padding:22px;
  backdrop-filter:blur(10px);box-shadow:var(--shadow-lg)}
.glasscard__row{display:flex;justify-content:space-between;align-items:center;
  padding:10px 0;border-bottom:1px dashed rgba(255,255,255,.15);color:#cdd8ea;font-size:14px}
.glasscard__row b{color:#fff;font-size:18px}
.glasscard__row b.up{color:var(--orange-2)}
.spark{margin:8px 0;height:70px}
.spark svg{width:100%;height:100%}
.glasscard__tags{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px}
.glasscard__tags span{background:rgba(255,255,255,.14);border-radius:8px;padding:5px 10px;font-size:12px;font-weight:600}

.hero__wave{position:absolute;bottom:-1px;left:0;right:0;height:60px;
  background:var(--bg);clip-path:polygon(0 100%,100% 100%,100% 0,polygon 0 0);
  /* soft curve */
  border-top-left-radius:50% 60px;border-top-right-radius:50% 60px;}

/* ---------- 实力数据条 ---------- */
.stats{background:var(--bg);margin-top:-30px;position:relative;z-index:2}
.stats__grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:28px 24px;margin-bottom:0}
.stat{text-align:center}
.stat__num{font-size:clamp(28px,3.4vw,40px);font-weight:900;color:var(--navy);
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.stat__label{color:var(--muted);font-size:14px;margin-top:4px}

/* ---------- 通用 section ---------- */
.section{padding:84px 0}
.section--alt{background:var(--bg-alt)}
.section__head{text-align:center;max-width:720px;margin:0 auto 50px}
.eyebrow{display:inline-block;color:var(--orange);font-weight:700;font-size:14px;
  letter-spacing:1.5px;text-transform:uppercase;margin-bottom:10px}
.section__head h2{font-size:clamp(26px,3.4vw,38px)}
.section__head p{color:var(--muted);margin-top:14px;font-size:16px}

/* ---------- 服务卡片 ---------- */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:28px;box-shadow:var(--shadow);transition:.28s;position:relative;overflow:hidden}
.card::before{content:"";position:absolute;inset:0;background:var(--grad-blue);
  opacity:0;transition:.28s;z-index:-1}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:transparent}
.card--wide{grid-column:span 3;background:linear-gradient(120deg,#fff,#f7faff)}
.card__icon{width:54px;height:54px;border-radius:14px;display:grid;place-items:center;
  font-size:28px;background:var(--bg-alt);margin-bottom:16px}
.card h3{font-size:20px;margin-bottom:10px}
.card p{color:var(--text);font-size:15px}
.card__list{list-style:none;margin-top:14px;display:flex;flex-direction:column;gap:8px}
.card__list li{position:relative;padding-left:22px;font-size:14px;color:var(--muted)}
.card__list li::before{content:"✓";position:absolute;left:0;top:0;color:var(--orange);font-weight:900}
.card__list--inline{flex-direction:row;flex-wrap:wrap;gap:10px}
.card__list--inline li{background:var(--bg-alt);border-radius:8px;padding:6px 12px 6px 28px;margin:0}
.card__list--inline li::before{left:10px}

/* ---------- 实力背书 ---------- */
.strength{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.strength__item{background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:26px;box-shadow:var(--shadow);transition:.28s}
.strength__item:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg)}
.strength__num{font-size:30px;font-weight:900;color:var(--orange);opacity:.85;margin-bottom:8px}
.strength__item h3{font-size:18px;margin-bottom:8px}
.strength__item p{font-size:14px;color:var(--muted)}

.partners{margin-top:46px;text-align:center}
.partners__label{display:block;color:var(--muted);font-size:13px;letter-spacing:1px;margin-bottom:18px}
.partners__logos{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.partner{background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px 22px;
  font-weight:800;color:var(--navy);text-align:center;line-height:1.3;font-size:14px;min-width:130px;
  box-shadow:var(--shadow)}
.partner br{display:block;content:"";margin:2px 0}

/* ---------- 案例 ---------- */
.cases{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.case{background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:26px;box-shadow:var(--shadow);transition:.28s;display:flex;flex-direction:column}
.case:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.case__tag{display:inline-block;background:var(--bg-alt);color:var(--blue);font-weight:700;
  font-size:12px;padding:5px 12px;border-radius:999px;margin-bottom:14px;align-self:flex-start}
.case h3{font-size:18px;margin-bottom:10px}
.case>p{font-size:14px;color:var(--muted);flex:1}
.case__metrics{display:flex;gap:14px;margin-top:18px;flex-wrap:wrap}
.case__metrics div{display:flex;flex-direction:column}
.case__metrics b{font-size:24px;font-weight:900;color:var(--navy);
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.case__metrics span{font-size:12px;color:var(--muted)}

/* ---------- 流程 ---------- */
.steps{display:grid;grid-template-columns:repeat(5,1fr);gap:16px;counter-reset:step}
.step{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px 18px;
  box-shadow:var(--shadow);text-align:center;position:relative}
.step__no{width:44px;height:44px;border-radius:50%;background:var(--grad);color:#fff;
  display:grid;place-items:center;font-weight:900;font-size:18px;margin:0 auto 14px}
.step h3{font-size:16px;margin-bottom:8px}
.step p{font-size:13px;color:var(--muted)}

/* ---------- 评价 ---------- */
.voices{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.voice{background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:26px;box-shadow:var(--shadow);position:relative}
.voice::before{content:"\201C";position:absolute;top:6px;left:18px;font-size:60px;color:var(--line);font-family:Georgia,serif}
.voice p{font-size:15px;color:var(--text);margin:14px 0 16px;position:relative;z-index:1}
.voice footer{font-size:14px;color:var(--muted)}
.voice footer b{color:var(--navy)}

/* ---------- CTA ---------- */
.cta{background:linear-gradient(120deg,var(--navy),var(--navy-2));color:#fff;text-align:center;padding:0}
.cta__inner{padding:70px 22px}
.cta h2{color:#fff;font-size:clamp(24px,3vw,34px)}
.cta p{color:#cdd8ea;max-width:600px;margin:14px auto 26px;font-size:16px}

/* ---------- 联系 ---------- */
.contact__grid{display:grid;grid-template-columns:1fr 1.1fr;gap:46px;align-items:start}
.contact__info h2{font-size:30px;margin:8px 0 14px}
.contact__info p{color:var(--muted);margin-bottom:22px}
.contact__list{list-style:none;display:flex;flex-direction:column;gap:12px}
.contact__list li{background:var(--bg-alt);border-radius:var(--radius-sm);padding:12px 16px;font-size:15px;color:var(--ink)}
.contact__form{background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:26px;box-shadow:var(--shadow);display:grid;grid-template-columns:1fr 1fr;gap:16px}
.field{display:flex;flex-direction:column;gap:7px}
.field--full{grid-column:1/-1}
.field label{font-size:13px;font-weight:700;color:var(--ink)}
.field input,.field select,.field textarea{
  border:1.5px solid var(--line);border-radius:var(--radius-sm);padding:11px 13px;
  font-size:14px;font-family:inherit;color:var(--ink);background:#fbfdff;transition:.2s}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--blue-2);background:#fff;box-shadow:0 0 0 3px rgba(47,123,255,.12)}
.field textarea{resize:vertical}
.form__hint{grid-column:1/-1;text-align:center;font-weight:700;color:#1a9e5c}

/* ---------- 页脚 ---------- */
.footer{background:var(--navy);color:#aebbd2;padding-top:54px}
.footer__inner{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:30px;padding-bottom:40px}
.footer__brand p{margin-top:14px;font-size:14px;max-width:320px;color:#9fb0cc}
.footer__col h4{color:#fff;font-size:15px;margin-bottom:14px}
.footer__col a{display:block;font-size:14px;padding:5px 0;color:#aebbd2;transition:.2s}
.footer__col a:hover{color:var(--orange-2)}
.footer__bottom{border-top:1px solid rgba(255,255,255,.1);padding:18px 0;font-size:13px;color:#8294b3}

/* ---------- 进场动画 ---------- */
.reveal{opacity:0;transform:translateY(28px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}

/* ---------- 响应式 ---------- */
@media (max-width:980px){
  .hero__inner{grid-template-columns:1fr;padding-top:50px}
  .hero__panel{order:-1}
  .cards{grid-template-columns:repeat(2,1fr)}
  .card--wide{grid-column:span 2}
  .strength{grid-template-columns:repeat(2,1fr)}
  .cases,.voices{grid-template-columns:1fr}
  .steps{grid-template-columns:repeat(2,1fr)}
  .footer__inner{grid-template-columns:1fr 1fr}
}
@media (max-width:680px){
  .topbar__left{display:none}
  .topbar__inner{justify-content:center}
  .nav__links{position:fixed;top:108px;left:0;right:0;background:#fff;flex-direction:column;
    gap:0;padding:10px 22px 22px;box-shadow:var(--shadow);transform:translateY(-140%);transition:.3s;z-index:40}
  .nav__links.open{transform:translateY(0)}
  .nav__links > a,.nav__item > a{padding:14px 0;border-bottom:1px solid var(--line)}
  .dropdown{position:static;opacity:1;visibility:visible;transform:none;box-shadow:none;
    border:0;padding:0 0 8px 18px;background:transparent;min-width:0}
  .dropdown li a{padding:9px 12px;color:var(--muted);font-weight:600}
  .has-dropdown:hover .caret{transform:none}
  .nav__cta{display:none}
  .nav__toggle{display:flex}
  .stats__grid{grid-template-columns:repeat(2,1fr);gap:24px 12px}
  .cards{grid-template-columns:1fr}
  .card--wide{grid-column:span 1}
  .strength{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .contact__grid{grid-template-columns:1fr;gap:30px}
  .contact__form{grid-template-columns:1fr}
  .footer__inner{grid-template-columns:1fr}
}