*{
    margin:0;
    padding:0;
    box-sizing:border-box;
    font-family:"Segoe UI","Helvetica Neue",Arial,"Microsoft YaHei","微软雅黑","PingFang SC",sans-serif;
}
html,body{
    font-family:"Segoe UI","Helvetica Neue",Arial,"Microsoft YaHei","微软雅黑","PingFang SC",sans-serif;
    scroll-behavior:smooth;
}
:root{
    --ice1:#67e8f9;
    --ice2:#0c4a6e;
    --ice3:#0a3d5c;
    --snow:#f0fbff;
    --silver:#bcd7e4;
    --glass:rgba(255,255,255,0.06);
    --line:rgba(103,232,249,0.28);
}
body{
    background:
        radial-gradient(circle at 12% 8%, rgba(103,232,249,0.18), transparent 42%),
        radial-gradient(circle at 88% 22%, rgba(255,255,255,0.10), transparent 38%),
        radial-gradient(circle at 50% 92%, rgba(103,232,249,0.12), transparent 46%),
        linear-gradient(165deg,#041e2e 0%,#0c4a6e 48%,#062c42 100%);
    background-attachment:fixed;
    color:var(--snow);
    line-height:1.85;
    min-height:100vh;
    -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:14px;}
a{color:var(--ice1);text-decoration:none;}
a:hover{color:#ffffff;}

/* 顶部导航 */
.site-header{
    position:sticky;
    top:0;
    z-index:99;
    backdrop-filter:blur(16px);
    -webkit-backdrop-filter:blur(16px);
    background:rgba(6,32,48,0.78);
    border-bottom:1px solid var(--line);
    box-shadow:0 6px 28px rgba(0,0,0,0.35);
}
.header-inner{
    max-width:1200px;
    margin:0 auto;
    padding:14px 20px;
    display:flex;
    align-items:center;
    justify-content:space-between;
    flex-wrap:wrap;
    gap:12px;
}
.brand{
    display:flex;
    align-items:center;
    gap:10px;
    font-size:1.15rem;
    font-weight:700;
    letter-spacing:1px;
    color:#ffffff;
}
.brand .dot{
    width:12px;height:12px;border-radius:50%;
    background:linear-gradient(135deg,#67e8f9,#ffffff);
    box-shadow:0 0 12px #67e8f9;
}
.nav-links{
    display:flex;
    flex-wrap:wrap;
    gap:6px;
    align-items:center;
}
.nav-links a{
    display:inline-block;
    padding:7px 14px;
    border-radius:20px;
    font-size:0.92rem;
    color:var(--silver);
    border:1px solid transparent;
    transition:.25s;
}
.nav-links a:hover{
    color:#062c42;
    background:linear-gradient(135deg,#67e8f9,#e6fbff);
    border-color:rgba(255,255,255,0.6);
    box-shadow:0 0 18px rgba(103,232,249,0.55);
}

/* 通用区块 */
section{
    max-width:1200px;
    margin:0 auto;
    padding:56px 20px;
}
.sec-title{
    font-size:1.55rem;
    font-weight:700;
    letter-spacing:1px;
    margin-bottom:10px;
    color:#ffffff;
    display:flex;
    align-items:center;
    gap:10px;
}
.sec-title::before{
    content:"";
    width:6px;height:24px;border-radius:3px;
    background:linear-gradient(180deg,#67e8f9,#ffffff);
    box-shadow:0 0 12px rgba(103,232,249,0.8);
}
.sec-sub{
    color:var(--silver);
    font-size:0.95rem;
    margin-bottom:28px;
}

/* 冰晶卡片 */
.ice-card{
    position:relative;
    background:linear-gradient(150deg,rgba(255,255,255,0.10),rgba(255,255,255,0.03));
    border:1px solid var(--line);
    border-radius:18px;
    padding:24px;
    overflow:hidden;
    transition:.3s;
    box-shadow:inset 0 1px 0 rgba(255,255,255,0.18),0 10px 30px rgba(0,0,0,0.28);
}
.ice-card::after{
    content:"";
    position:absolute;
    top:-40%;right:-30%;
    width:180px;height:180px;
    background:radial-gradient(circle,rgba(103,232,249,0.35),transparent 68%);
    pointer-events:none;
}
.ice-card:hover{
    transform:translateY(-6px);
    border-color:rgba(255,255,255,0.65);
    box-shadow:inset 0 1px 0 rgba(255,255,255,0.3),0 18px 42px rgba(103,232,249,0.22);
}
.ice-card h3{
    font-size:1.08rem;
    margin-bottom:10px;
    color:#ffffff;
    letter-spacing:.5px;
}
.ice-card p{
    color:var(--silver);
    font-size:0.94rem;
}

/* HERO */
#hero{
    max-width:1200px;
    padding-top:60px;
    padding-bottom:40px;
}
.hero-grid{
    display:grid;
    grid-template-columns:1.15fr .85fr;
    gap:36px;
    align-items:center;
}
.hero-badge{
    display:inline-block;
    padding:5px 16px;
    border-radius:20px;
    font-size:0.82rem;
    letter-spacing:2px;
    color:#062c42;
    background:linear-gradient(135deg,#67e8f9,#e6fbff);
    margin-bottom:18px;
    box-shadow:0 0 20px rgba(103,232,249,0.55);
}
h1{
    font-size:2.15rem;
    line-height:1.4;
    letter-spacing:1px;
    color:#ffffff;
    margin-bottom:18px;
    text-shadow:0 0 26px rgba(103,232,249,0.45);
}
.hero-desc{
    color:var(--silver);
    font-size:1rem;
    margin-bottom:26px;
}
.btn-row{display:flex;flex-wrap:wrap;gap:14px;}
.btn{
    display:inline-block;
    padding:12px 30px;
    border-radius:30px;
    font-size:0.96rem;
    font-weight:600;
    letter-spacing:1px;
    transition:.3s;
    border:1px solid var(--line);
}
.btn-primary{
    color:#04202f;
    background:linear-gradient(135deg,#67e8f9,#ffffff);
    border-color:rgba(255,255,255,0.7);
    box-shadow:0 0 24px rgba(103,232,249,0.55);
}
.btn-primary:hover{
    transform:translateY(-3px);
    box-shadow:0 0 36px rgba(103,232,249,0.9);
    color:#04202f;
}
.btn-ghost{
    color:var(--ice1);
    background:rgba(255,255,255,0.05);
}
.btn-ghost:hover{
    background:rgba(255,255,255,0.14);
    color:#ffffff;
    transform:translateY(-3px);
}
.hero-img{
    border:1px solid var(--line);
    border-radius:22px;
    padding:8px;
    background:linear-gradient(150deg,rgba(255,255,255,0.14),rgba(255,255,255,0.02));
    box-shadow:0 20px 48px rgba(0,0,0,0.42),0 0 40px rgba(103,232,249,0.22);
}
.hero-img img{width:100%;height:auto;border-radius:16px;}

/* GEO */
#geo-intro{
    padding-top:20px;
}
.geo-box{
    background:linear-gradient(150deg,rgba(255,255,255,0.09),rgba(255,255,255,0.02));
    border:1px solid var(--line);
    border-left:4px solid var(--ice1);
    border-radius:16px;
    padding:26px 28px;
    color:var(--silver);
    font-size:1rem;
    box-shadow:inset 0 1px 0 rgba(255,255,255,0.16);
}
.geo-box strong{color:#ffffff;}

/* 网格 */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:22px;}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}

/* 数据统计 */
.stat-item{
    text-align:center;
    padding:28px 16px;
    background:linear-gradient(160deg,rgba(103,232,249,0.16),rgba(255,255,255,0.03));
    border:1px solid var(--line);
    border-radius:18px;
    box-shadow:inset 0 1px 0 rgba(255,255,255,0.2);
}
.stat-num{
    font-size:1.9rem;
    font-weight:800;
    color:#ffffff;
    letter-spacing:1px;
    text-shadow:0 0 20px rgba(103,232,249,0.7);
}
.stat-label{
    color:var(--silver);
    font-size:0.88rem;
    margin-top:6px;
    letter-spacing:1px;
}

/* 时间线 */
.timeline-list{
    position:relative;
    padding-left:28px;
    border-left:2px dashed rgba(103,232,249,0.4);
}
.timeline-item{
    position:relative;
    margin-bottom:26px;
    padding-left:8px;
}
.timeline-item::before{
    content:"";
    position:absolute;
    left:-37px;top:8px;
    width:14px;height:14px;
    border-radius:50%;
    background:linear-gradient(135deg,#67e8f9,#ffffff);
    box-shadow:0 0 14px rgba(103,232,249,0.9);
}
.timeline-item h4{color:#ffffff;font-size:1rem;margin-bottom:4px;}
.timeline-item p{color:var(--silver);font-size:0.92rem;}

/* 新闻 */
.news-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px;}
.news-item{
    background:linear-gradient(150deg,rgba(255,255,255,0.09),rgba(255,255,255,0.025));
    border:1px solid var(--line);
    border-radius:18px;
    padding:22px;
    transition:.3s;
    box-shadow:inset 0 1px 0 rgba(255,255,255,0.16);
}
.news-item:hover{
    transform:translateY(-5px);
    border-color:rgba(255,255,255,0.6);
    box-shadow:0 16px 40px rgba(103,232,249,0.2);
}
.news-meta{
    display:flex;
    align-items:center;
    gap:12px;
    margin-bottom:12px;
    font-size:0.82rem;
}
.news-tag{
    padding:3px 12px;
    border-radius:14px;
    color:#04202f;
    background:linear-gradient(135deg,#67e8f9,#e6fbff);
    letter-spacing:1px;
}
.news-date{color:var(--silver);letter-spacing:.5px;}
.news-item h3{font-size:1.04rem;color:#ffffff;margin-bottom:10px;line-height:1.6;}
.news-item p{color:var(--silver);font-size:0.92rem;}

/* FAQ */
.faq-box{display:grid;gap:16px;}
.faq-item{
    background:linear-gradient(150deg,rgba(255,255,255,0.08),rgba(255,255,255,0.02));
    border:1px solid var(--line);
    border-radius:16px;
    padding:22px 24px;
    transition:.3s;
}
.faq-item:hover{border-color:rgba(255,255,255,0.55);}
.faq-q{
    font-size:1.02rem;
    font-weight:700;
    color:#ffffff;
    margin-bottom:10px;
    display:flex;
    gap:10px;
    align-items:flex-start;
}
.faq-q span{
    color:#04202f;
    background:linear-gradient(135deg,#67e8f9,#ffffff);
    width:24px;height:24px;
    border-radius:50%;
    display:inline-flex;
    align-items:center;
    justify-content:center;
    font-size:0.8rem;
    flex:0 0 24px;
    margin-top:3px;
}
.faq-a{color:var(--silver);font-size:0.94rem;}

/* CTA */
#cta .cta-inner{
    background:linear-gradient(135deg,rgba(103,232,249,0.22),rgba(12,74,110,0.55));
    border:1px solid rgba(255,255,255,0.3);
    border-radius:24px;
    padding:44px 30px;
    text-align:center;
    box-shadow:0 20px 50px rgba(0,0,0,0.35),inset 0 1px 0 rgba(255,255,255,0.3);
}
.cta-inner h2{font-size:1.6rem;color:#ffffff;margin-bottom:12px;letter-spacing:1px;}
.cta-inner p{color:var(--silver);margin-bottom:26px;font-size:0.98rem;}

/* 合作伙伴 */
.partner-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:18px;}
.partner-item{
    text-align:center;
    padding:22px 14px;
    border:1px solid var(--line);
    border-radius:16px;
    background:rgba(255,255,255,0.05);
    color:var(--silver);
    font-size:0.94rem;
    transition:.3s;
}
.partner-item:hover{
    background:rgba(103,232,249,0.14);
    color:#ffffff;
    transform:translateY(-4px);
}
.partner-item .emoji{font-size:1.6rem;display:block;margin-bottom:8px;}

/* 下载 */
.dl-box{
    display:grid;
    grid-template-columns:1fr 1fr;
    gap:22px;
    align-items:center;
}
.dl-list{list-style:none;margin-top:16px;}
.dl-list li{
    color:var(--silver);
    font-size:0.94rem;
    padding:8px 0 8px 26px;
    position:relative;
}
.dl-list li::before{
    content:"❄";
    position:absolute;left:0;top:6px;
    color:var(--ice1);
    font-size:0.9rem;
}

/* 页脚 */
.site-footer{
    border-top:1px solid var(--line);
    background:rgba(4,26,40,0.86);
    backdrop-filter:blur(10px);
    padding:44px 20px 28px;
    margin-top:30px;
}
.footer-inner{
    max-width:1200px;
    margin:0 auto;
    display:grid;
    grid-template-columns:repeat(auto-fit,minmax(240px,1fr));
    gap:30px;
}
.footer-col h4{
    color:#ffffff;
    font-size:1rem;
    margin-bottom:14px;
    letter-spacing:1px;
}
.footer-col p,.footer-col li{
    color:var(--silver);
    font-size:0.9rem;
    line-height:2;
    list-style:none;
}
.footer-col a{color:var(--ice1);}
.footer-bottom{
    max-width:1200px;
    margin:30px auto 0;
    padding-top:20px;
    border-top:1px solid rgba(103,232,249,0.18);
    text-align:center;
    color:var(--silver);
    font-size:0.86rem;
    letter-spacing:.5px;
}
.footer-bottom a{color:var(--ice1);}

@media (max-width:900px){
    .hero-grid,.grid-3,.grid-4,.news-grid,.grid-2,.dl-box{grid-template-columns:1fr;}
    h1{font-size:1.6rem;}
    .header-inner{justify-content:center;}
    section{padding:40px 16px;}
}