:root{
  --navy:#0B1F3A;
  --navy-2:#102a4c;
  --navy-3:#16365f;
  --fire:#FF5A1F;
  --fire-2:#E63946;
  --fire-soft:rgba(255,90,31,.12);
  --ink:#1c2733;
  --muted:#5b6b7a;
  --bg:#f4f7fb;
  --card:#ffffff;
  --line:#e6ecf3;
  --radius:16px;
  --radius-lg:22px;
  --shadow-sm:0 4px 14px rgba(16,42,76,.06);
  --shadow:0 16px 40px rgba(16,42,76,.12);
  --shadow-fire:0 14px 34px rgba(255,90,31,.28);
  --maxw:1180px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei","Hiragino Sans GB",sans-serif;
  color:var(--ink);background:var(--bg);line-height:1.75;font-size:16px;-webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{max-width:var(--maxw);margin:0 auto;padding:0 22px}
.svg-sprite{position:absolute;width:0;height:0;overflow:hidden}

/* Icons */
.ico{width:24px;height:24px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;flex:none;display:inline-block}
.ic-wrap{width:56px;height:56px;border-radius:16px;background:linear-gradient(135deg,rgba(255,90,31,.16),rgba(230,57,70,.12));color:var(--fire-2);display:flex;align-items:center;justify-content:center;margin-bottom:18px;transition:.25s}
.ic-wrap .ico{width:28px;height:28px}
.card:hover .ic-wrap{background:linear-gradient(135deg,var(--fire),var(--fire-2));color:#fff;transform:rotate(-6deg) scale(1.05)}

/* Header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(11,31,58,.94);backdrop-filter:blur(10px);border-bottom:1px solid rgba(255,255,255,.07)}
.nav{display:flex;align-items:center;justify-content:space-between;height:68px}
.brand{display:flex;align-items:center;gap:11px;color:#fff;font-weight:700;font-size:19px;letter-spacing:.5px}
.brand .logo{width:34px;height:34px;border-radius:10px;background:linear-gradient(135deg,var(--fire),var(--fire-2));display:flex;align-items:center;justify-content:center}
.brand .logo svg{width:20px;height:20px;color:#fff}
.brand small{display:block;font-size:10px;font-weight:600;color:#9fb2c9;letter-spacing:2.5px;margin-top:1px}
.nav-links{display:flex;gap:6px;align-items:center}
.nav-links a{color:#cdd9e8;font-size:15px;transition:.2s;display:flex;align-items:center;gap:7px;padding:9px 13px;border-radius:10px}
.nav-links a .ico{width:18px;height:18px}
.nav-links a:hover{color:#fff;background:rgba(255,255,255,.07)}
.nav-links a.active{color:#fff;background:rgba(255,90,31,.16)}
.nav-cta{background:var(--fire)!important;color:#fff!important;padding:9px 18px!important;border-radius:999px!important;font-weight:600;font-size:14px}
.nav-cta:hover{box-shadow:var(--shadow-fire);transform:translateY(-1px)}
.nav-toggle{display:none;background:none;border:0;color:#fff;font-size:26px;cursor:pointer;line-height:1}

/* Hero */
.hero{position:relative;background:radial-gradient(1100px 620px at 82% -12%,rgba(255,90,31,.28),transparent),linear-gradient(158deg,var(--navy),var(--navy-2) 60%,var(--navy-3));color:#fff;overflow:hidden}
.hero::after{content:"";position:absolute;inset:0;background-image:radial-gradient(rgba(255,255,255,.06) 1px,transparent 1px);background-size:26px 26px;opacity:.5;pointer-events:none}
.hero-grid{display:grid;grid-template-columns:1.08fr .92fr;gap:40px;align-items:center;padding:84px 0 80px;position:relative;z-index:2}
.hero .eyebrow,.page-hero .eyebrow{display:inline-flex;align-items:center;gap:8px;background:rgba(255,90,31,.16);color:#ffb38f;border:1px solid rgba(255,90,31,.4);padding:7px 15px;border-radius:999px;font-size:13px;letter-spacing:.5px;margin-bottom:22px}
.hero h1{font-size:46px;line-height:1.18;font-weight:800;max-width:640px;margin-bottom:20px;letter-spacing:-.5px}
.hero h1 .hl,.page-hero h1 .hl{color:var(--fire);background:linear-gradient(90deg,#ff7a3d,#ff5a1f);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.hero p.lead,.page-hero p.lead{font-size:18px;color:#c6d3e4;max-width:560px;margin-bottom:30px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:9px;padding:13px 25px;border-radius:999px;font-weight:600;font-size:15px;transition:.22s;cursor:pointer}
.btn .ico{width:18px;height:18px}
.btn-primary{background:var(--fire);color:#fff}
.btn-primary:hover{transform:translateY(-2px);box-shadow:var(--shadow-fire)}
.btn-ghost{border:1px solid rgba(255,255,255,.35);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.12)}
.hero-stats{display:flex;gap:30px;margin-top:48px;flex-wrap:wrap}
.hero-stats .s{position:relative;padding-left:14px}
.hero-stats .s::before{content:"";position:absolute;left:0;top:6px;bottom:6px;width:3px;border-radius:3px;background:linear-gradient(var(--fire),var(--fire-2))}
.hero-stats .s b{display:block;font-size:26px;font-weight:800;color:#fff;line-height:1.2}
.hero-stats .s b em{color:var(--fire);font-style:normal}
.hero-stats .s span{font-size:13px;color:#9fb2c9}

/* Hero art */
.hero-art{position:relative}
.hero-art .art-card{background:linear-gradient(160deg,rgba(255,255,255,.08),rgba(255,255,255,.02));border:1px solid rgba(255,255,255,.12);border-radius:var(--radius-lg);padding:14px;backdrop-filter:blur(4px);box-shadow:var(--shadow)}
.hero-art svg.scene{width:100%;height:auto;display:block}
.hero-art .badge{position:absolute;display:flex;align-items:center;gap:9px;background:rgba(11,31,58,.9);border:1px solid rgba(255,90,31,.4);color:#fff;padding:10px 14px;border-radius:14px;font-size:13px;font-weight:600;box-shadow:var(--shadow)}
.hero-art .badge .dot{width:9px;height:9px;border-radius:50%;background:var(--fire);box-shadow:0 0 0 4px rgba(255,90,31,.25);animation:pulse 2s infinite}
.hero-art .badge.b1{top:18px;right:-10px}
.hero-art .badge.b2{bottom:26px;left:-14px}
@keyframes pulse{0%,100%{box-shadow:0 0 0 4px rgba(255,90,31,.25)}50%{box-shadow:0 0 0 8px rgba(255,90,31,.08)}}

/* Section */
section.block{padding:78px 0}
.section-head{text-align:center;max-width:740px;margin:0 auto 50px;position:relative}
.section-head .tag{display:inline-block;color:var(--fire);font-weight:700;letter-spacing:2px;font-size:13px;text-transform:uppercase;margin-bottom:10px}
.section-head h2{font-size:34px;margin:6px 0 14px;color:var(--navy);letter-spacing:-.3px}
.section-head p{color:var(--muted);font-size:16px}
.section-head.center::after{content:"";display:block;width:54px;height:4px;border-radius:4px;background:linear-gradient(90deg,var(--fire),var(--fire-2));margin:18px auto 0}

/* Cards grid */
.grid{display:grid;gap:22px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:30px;transition:.25s;position:relative;overflow:hidden}
.card::before{content:"";position:absolute;left:0;top:0;height:3px;width:0;background:linear-gradient(90deg,var(--fire),var(--fire-2));transition:.3s}
.card:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:rgba(255,90,31,.35)}
.card:hover::before{width:100%}
.card h3{font-size:20px;color:var(--navy);margin-bottom:10px;line-height:1.4}
.card p{color:var(--muted);font-size:15px}
.card .flist{margin-top:14px}

/* Two column */
.split{display:grid;grid-template-columns:1.05fr .95fr;gap:50px;align-items:center}
.split .visual{background:linear-gradient(160deg,var(--navy),var(--navy-2));border-radius:var(--radius-lg);padding:38px;color:#fff;position:relative;overflow:hidden}
.split .visual::after{content:"";position:absolute;right:-40px;top:-40px;width:160px;height:160px;border-radius:50%;background:radial-gradient(rgba(255,90,31,.35),transparent 70%)}
.split .visual h4{font-size:23px;margin-bottom:18px;position:relative;z-index:1}
.split .visual ul{list-style:none;display:grid;gap:14px;position:relative;z-index:1}
.split .visual li{display:flex;gap:12px;align-items:flex-start;color:#d6e1f0;font-size:15px;line-height:1.6}
.split .visual li b{color:#ffb38f}
.split .visual li .ico{color:var(--fire);margin-top:2px;flex:none}

/* Feature list */
.flist{list-style:none;display:grid;gap:12px}
.flist li{display:flex;gap:12px;align-items:flex-start;background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px 16px;font-size:15px;color:var(--muted)}
.flist li .n{background:linear-gradient(135deg,var(--navy),var(--navy-2));color:#fff;width:26px;height:26px;border-radius:8px;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:13px;flex:none}
.flist li b{color:var(--navy)}

/* Timeline */
.timeline{display:grid;gap:16px}
.tl{display:grid;grid-template-columns:130px 1fr;gap:20px;background:#fff;border:1px solid var(--line);border-radius:14px;padding:20px 24px;align-items:center;transition:.2s}
.tl:hover{border-color:rgba(255,90,31,.35);box-shadow:var(--shadow-sm)}
.tl .date{color:var(--fire);font-weight:800;font-size:17px}
.tl h4{color:var(--navy);margin-bottom:4px;font-size:17px}
.tl p{color:var(--muted);font-size:14px}

/* CTA band */
.cta-band{background:linear-gradient(135deg,var(--fire),var(--fire-2));color:#fff;text-align:center;padding:56px 26px;border-radius:var(--radius-lg);position:relative;overflow:hidden;box-shadow:var(--shadow-fire)}
.cta-band::after{content:"";position:absolute;left:-60px;bottom:-60px;width:200px;height:200px;border-radius:50%;background:rgba(255,255,255,.12)}
.cta-band h2{font-size:30px;margin-bottom:12px;position:relative;z-index:1}
.cta-band p{margin-bottom:24px;opacity:.96;position:relative;z-index:1}
.cta-band .btn{background:#fff;color:var(--fire-2)}

/* Page hero (sub pages) with banner art */
.page-hero{background:radial-gradient(900px 400px at 85% 0%,rgba(255,90,31,.22),transparent),linear-gradient(158deg,var(--navy),var(--navy-2));color:#fff;position:relative;overflow:hidden}
.page-hero::after{content:"";position:absolute;inset:0;background-image:radial-gradient(rgba(255,255,255,.055) 1px,transparent 1px);background-size:24px 24px;opacity:.5}
.banner-grid{display:grid;grid-template-columns:1.3fr .7fr;gap:30px;align-items:center;padding:62px 0 56px;position:relative;z-index:2}
.page-hero h1{font-size:40px;margin-bottom:14px;letter-spacing:-.3px}
.page-hero p{color:#c6d3e4;max-width:620px;font-size:17px}
.breadcrumb{font-size:13px;color:#9fb2c9;margin-bottom:14px}
.breadcrumb a{color:#9fb2c9}
.breadcrumb a:hover{color:#fff}
.banner-art{display:flex;justify-content:center}
.banner-art svg{width:100%;max-width:260px;height:auto;filter:drop-shadow(0 14px 30px rgba(0,0,0,.3))}

/* Contact */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:42px}
.contact-info .item{display:flex;gap:16px;margin-bottom:20px;align-items:flex-start}
.contact-info .item .ic{width:46px;height:46px;border-radius:12px;background:var(--fire-soft);color:var(--fire-2);display:flex;align-items:center;justify-content:center;font-size:20px;flex:none}
.contact-info .item .ic .ico{width:22px;height:22px}
.contact-info .item b{color:var(--navy);display:block;font-size:16px;margin-bottom:2px}
.contact-info .item span{color:var(--muted);font-size:15px}
.form input,.form textarea{width:100%;padding:13px 15px;border:1px solid var(--line);border-radius:11px;font-size:15px;margin-bottom:14px;font-family:inherit;transition:.2s;background:#fff}
.form input:focus,.form textarea:focus{outline:none;border-color:var(--fire);box-shadow:0 0 0 3px rgba(255,90,31,.12)}
.form textarea{min-height:120px;resize:vertical}
.form button{width:100%;background:linear-gradient(135deg,var(--fire),var(--fire-2));color:#fff;border:0;padding:15px;border-radius:11px;font-weight:600;font-size:16px;cursor:pointer;transition:.2s;display:flex;align-items:center;justify-content:center;gap:9px}
.form button:hover{box-shadow:var(--shadow-fire);transform:translateY(-1px)}
.note{background:#fff7f3;border:1px solid #ffd8c4;color:#a23a16;padding:14px 16px;border-radius:11px;font-size:14px;margin-top:14px}

/* Badge art (FAQ hero) */
.badge-art{display:flex;justify-content:center}
.badge-art svg{width:100%;max-width:240px;height:auto;filter:drop-shadow(0 14px 30px rgba(0,0,0,.3))}

/* Facts band (index) */
.facts{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:8px}
.fact{background:#fff;border:1px solid var(--line);border-radius:14px;padding:22px;position:relative;overflow:hidden}
.fact::before{content:"";position:absolute;left:0;top:0;height:3px;width:100%;background:linear-gradient(90deg,var(--fire),var(--fire-2));opacity:.85}
.fact b{display:block;font-size:21px;color:var(--navy);margin-bottom:6px;line-height:1.25}
.fact span{font-size:13.5px;color:var(--muted)}

/* FAQ */
.faq-list{display:grid;gap:16px;max-width:920px;margin:0 auto}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px 28px;position:relative;overflow:hidden;transition:.25s}
.faq-item:hover{border-color:rgba(255,90,31,.4);box-shadow:var(--shadow-sm)}
.faq-item .q{display:flex;align-items:flex-start;gap:14px;margin-bottom:12px}
.faq-item .qn{background:linear-gradient(135deg,var(--fire),var(--fire-2));color:#fff;font-weight:800;font-size:15px;width:34px;height:34px;border-radius:10px;display:flex;align-items:center;justify-content:center;flex:none}
.faq-item h3{font-size:20px;color:var(--navy);line-height:1.4;margin:0}
.faq-item p{color:var(--muted);font-size:15.5px;margin-left:48px}
.ref-box{background:#eef2f7;border:1px solid var(--line);border-radius:var(--radius);padding:28px 30px;max-width:920px;margin:36px auto 0}
.ref-box h4{display:flex;align-items:center;gap:9px;color:var(--navy);font-size:18px;margin-bottom:12px}
.ref-box h4 .ico{color:var(--fire);width:22px;height:22px}
.ref-box ul{list-style:none;display:grid;gap:9px}
.ref-box li{color:var(--muted);font-size:14.5px;padding-left:18px;position:relative}
.ref-box li::before{content:"";position:absolute;left:0;top:9px;width:7px;height:7px;border-radius:2px;background:var(--fire)}

/* Footer */
.site-footer{background:var(--navy);color:#aebfd2;padding:56px 0 28px}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:30px}
.site-footer h5{color:#fff;font-size:15px;margin-bottom:16px}
.site-footer a{color:#aebfd2;font-size:14px;display:block;margin-bottom:10px;transition:.2s}
.site-footer a:hover{color:#fff;padding-left:4px}
.foot-bottom{border-top:1px solid rgba(255,255,255,.08);margin-top:36px;padding-top:18px;font-size:13px;color:#7d93af;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}

/* Reveal animation */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}
.reveal.d1{transition-delay:.08s}.reveal.d2{transition-delay:.16s}.reveal.d3{transition-delay:.24s}.reveal.d4{transition-delay:.32s}.reveal.d5{transition-delay:.4s}.reveal.d6{transition-delay:.48s}

/* Responsive */
@media(max-width:900px){
  .grid-3,.grid-2,.contact-grid{grid-template-columns:1fr}
  .split,.hero-grid,.banner-grid{grid-template-columns:1fr}
  .hero-art{order:2;margin-top:10px}
  .banner-art{display:none}
  .nav-links{position:absolute;top:68px;left:0;right:0;background:var(--navy);flex-direction:column;gap:0;padding:8px 0;display:none;border-top:1px solid rgba(255,255,255,.08)}
  .nav-links.open{display:flex}
  .nav-links a{padding:13px 22px;border-radius:0}
  .nav-toggle{display:block}
  .hero h1{font-size:32px}
  .hero-stats{gap:22px}
  .tl{grid-template-columns:1fr}
  .section-head h2{font-size:27px}
  .facts{grid-template-columns:repeat(2,1fr)}
  .faq-item p{margin-left:0}
  .qa-strip{grid-template-columns:1fr}
}

/* 高频问题直答 strip */
.qa-strip{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin-top:6px}
.qa-chip{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);border-radius:14px;padding:18px 20px}
.qa-chip b{color:#ffb38f;display:block;margin-bottom:9px;font-size:15px;line-height:1.5}
.qa-chip p{color:#c6d3e4;font-size:14px;line-height:1.75;margin:0}
.qa-chip a{color:#ffb38f;text-decoration:underline}
@media(max-width:760px){.qa-strip{grid-template-columns:1fr}}

/* 语言切换器（页脚横排，保留） */
.lang-switch{display:inline-flex;align-items:center;gap:2px;margin-left:14px;padding:3px 4px;border:1px solid rgba(255,255,255,.22);border-radius:999px;font-size:13px;white-space:nowrap}
.lang-switch a{color:#cfe0f5;text-decoration:none;padding:3px 10px;border-radius:999px;font-weight:600}
.lang-switch a.active{background:#FF5A1F;color:#fff}
.foot-lang{margin:18px 0 0;justify-content:center}
/* 导航栏语言下拉（globe 图标，点开展开） */
.site-header .nav{position:relative}
.lang-select{position:relative;margin-left:auto}
.lang-select>summary{display:inline-flex;align-items:center;gap:6px;list-style:none;cursor:pointer;color:#cdd9e8;font-size:14px;font-weight:600;padding:8px 13px;border:1px solid rgba(255,255,255,.22);border-radius:999px;user-select:none;white-space:nowrap;transition:.2s}
.lang-select>summary::-webkit-details-marker{display:none}
.lang-select>summary:hover{background:rgba(255,255,255,.08);color:#fff}
.lang-select>summary .cur{min-width:22px;text-align:center}
.lang-select>summary .car{width:13px;height:13px;opacity:.7;transition:transform .2s}
.lang-select[open]>summary .car{transform:rotate(180deg)}
.lang-select>summary:focus-visible{outline:2px solid #FF5A1F;outline-offset:2px}
.lang-select>ul{position:absolute;right:0;top:calc(100% + 10px);min-width:130px;margin:0;padding:6px;list-style:none;background:#0e2a4d;border:1px solid rgba(255,255,255,.14);border-radius:14px;box-shadow:0 14px 34px rgba(0,0,0,.4);z-index:60}
.lang-select>ul li a{display:flex;align-items:center;justify-content:space-between;gap:10px;color:#cdd9e8;text-decoration:none;padding:9px 12px;border-radius:9px;font-size:14px;font-weight:600;transition:.15s}
.lang-select>ul li a:hover{background:rgba(255,255,255,.09);color:#fff}
.lang-select>ul li a.active{color:#fff;background:rgba(255,90,31,.18)}
@media(max-width:880px){.nav{justify-content:flex-start}.brand{margin-right:auto}.site-header .lang-select{margin-left:0;margin-right:2px}.lang-select>ul{right:0}}