/* ===== 全局基础 ===== */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
    background: #FFFFFF;
    color: #0B3D45;
    line-height: 1.7;
    font-size: 16px;
    overflow-x: hidden;
}
img { display: block; max-width: 100%; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
button { border: none; background: none; cursor: pointer; font-family: inherit; }

/* 通用容器 */
.nybox, .banbox, .secbox, .ftbox { width: 1200px; max-width: 96%; margin: 0 auto; }

/* 通用按钮：白底蓝字，蓝色主导 */
.nybtn {
    display: inline-flex; align-items: center; gap: 6px;
    background: #FFFFFF; color: #0A6E7A;
    padding: 10px 22px; border-radius: 26px;
    font-weight: 700; font-size: 15px;
    border: 2px solid #0A6E7A;
    transition: all 0.3s ease;
}
.nybtn:hover { background: #0A6E7A; color: #FFFFFF; border-color: #0A6E7A; }
.nybtn i { font-size: 18px; }
.nyline {
    display: inline-flex; align-items: center; gap: 6px;
    background: transparent; color: #7FD4DC;
    padding: 10px 22px; border-radius: 26px;
    font-weight: 700; font-size: 15px;
    border: 2px solid #7FD4DC;
    transition: all 0.3s ease;
}
.nyline:hover { background: #7FD4DC; color: #074E57; }

/* ===== 头部 ===== */
.nyhd {
    position: sticky; top: 0; z-index: 100;
    background: rgba(10,110,122,0.97);
    border-bottom: 2px solid #0E8491;
    backdrop-filter: blur(8px);
}
.nybox {
    display: flex; align-items: center; justify-content: space-between;
    height: 72px; gap: 24px;
}
.nylg {
    display: flex; align-items: center; gap: 10px;
    color: #F2FBFC;
}
.nylg img {
    width: 44px; height: 44px; border-radius: 50%;
    border: 2px solid #7FD4DC;
    background: #FFFFFF;
}
.nylg span {
    font-size: 20px; font-weight: 700;
    display: flex; align-items: baseline; gap: 8px;
    letter-spacing: 1px;
}
.nylg em {
    font-style: normal; font-size: 12px;
    color: #7FD4DC; font-weight: 400;
    padding: 2px 8px; border: 1px solid #7FD4DC;
    border-radius: 10px;
}
.nynv { display: flex; gap: 4px; flex: 1; justify-content: center; }
.nynv a {
    padding: 8px 14px; font-size: 15px;
    color: #D6ECEF; border-radius: 20px;
    transition: all 0.3s ease;
    position: relative;
}
.nynv a::after {
    content: ""; position: absolute; left: 50%; bottom: 2px;
    width: 0; height: 2px; background: #7FD4DC;
    transition: all 0.3s ease; transform: translateX(-50%);
}
.nynv a:hover { color: #7FD4DC; }
.nynv a:hover::after { width: 50%; }
.nyrt { display: flex; align-items: center; gap: 12px; }
.nymenu {
    display: none; color: #F2FBFC; font-size: 26px;
    padding: 4px;
}
.nymnv {
    display: none;
    flex-direction: column; gap: 4px;
    padding: 12px 20px 20px;
    background: #074E57;
    border-top: 1px solid #0E8491;
}
.nymnv a {
    color: #D6ECEF; padding: 10px 12px;
    border-radius: 8px; font-size: 15px;
}
.nymnv a:hover { background: #0A6E7A; color: #7FD4DC; }
.nymnv .nybtn { color: #0A6E7A; justify-content: center; margin-top: 8px; }

/* ===== 主视觉 ===== */
.nyban {
    background: linear-gradient(160deg, #0A6E7A 0%, #074E57 50%, #0A6E7A 100%);
    position: relative; overflow: hidden;
    padding: 70px 0 80px;
}
.nyban::before {
    content: ""; position: absolute; inset: 0;
    background-image:
        radial-gradient(circle at 75% 30%, rgba(127,212,220,0.22) 0, transparent 35%),
        radial-gradient(circle at 20% 80%, rgba(14,132,145,0.30) 0, transparent 40%);
    pointer-events: none;
}
.banbox {
    display: flex; align-items: center; gap: 40px;
    position: relative; z-index: 1;
}
.bantext { flex: 1; }
.ban-seal {
    display: inline-flex; align-items: center; gap: 6px;
    color: #FFFFFF; font-size: 13px;
    padding: 5px 14px;
    background: #2EAB66;
    border: 1px solid #2EAB66;
    border-radius: 4px;
    margin-bottom: 22px;
    letter-spacing: 2px;
}
.bantext h1 {
    font-size: 66px; color: #F2FBFC;
    letter-spacing: 6px; line-height: 1.1;
    margin-bottom: 14px; font-weight: 700;
}
.ban-sub {
    font-size: 26px; color: #7FD4DC;
    letter-spacing: 2px; margin-bottom: 22px;
}
.ban-desc {
    color: #C7E8EC; font-size: 15px;
    max-width: 480px; margin-bottom: 32px;
    line-height: 1.9;
}
.banbtn { display: flex; gap: 16px; margin-bottom: 40px; }
.banstat { display: flex; gap: 36px; }
.banstat li { display: flex; flex-direction: column; }
.banstat b {
    font-size: 24px; color: #7FD4DC;
    font-weight: 700; letter-spacing: 1px;
}
.banstat span { font-size: 13px; color: #C7E8EC; margin-top: 2px; }

/* 手机 mockup */
.banmo {
    flex: 0 0 380px; position: relative;
    height: 520px; display: flex; justify-content: center;
}
.banmo::before {
    content: ""; position: absolute; top: 50%; left: 50%;
    transform: translate(-50%,-50%);
    width: 320px; height: 320px; border-radius: 50%;
    background: radial-gradient(circle, rgba(127,212,220,0.28) 0%, transparent 70%);
    pointer-events: none;
}
.momfm {
    position: absolute; top: 0; left: 50%;
    transform: translateX(-50%);
    width: 240px; height: 480px;
    border: 3px solid #7FD4DC;
    border-radius: 36px;
    background: #FFFFFF;
    padding: 10px; overflow: hidden;
}
.momwall {
    display: block; width: 100%; height: 12px;
    background: #0A6E7A; border-radius: 6px;
    margin-bottom: 6px;
}
.momfm img {
    width: 100%; height: calc(100% - 18px);
    object-fit: cover; border-radius: 14px;
}
.momtwo {
    width: 200px; height: 400px;
    top: 80px; left: 22%;
    transform: rotate(-8deg);
    border-color: #BFE6EA;
    opacity: 0.9;
    z-index: -1;
}

/* ===== 通用 section ===== */
.nysec { padding: 72px 0; }
.nybg { background: #F5F9FB; }
.nytit {
    margin-bottom: 50px;
    display: flex; align-items: center; gap: 16px;
    position: relative;
}
.tit-bar {
    width: 6px; height: 36px; border-radius: 3px;
    background: linear-gradient(180deg, #0E8491 0%, #0A6E7A 100%);
}
.tit-txt {
    font-size: 30px; color: #0B3D45;
    letter-spacing: 4px; font-weight: 700;
}
.tit-sub {
    font-size: 13px; color: #0A6E7A;
    letter-spacing: 3px;
    padding: 4px 12px;
    border: 1px solid #0E8491;
    border-radius: 4px;
}
.nytit::after {
    content: ""; flex: 1; height: 1px;
    background: repeating-linear-gradient(90deg, rgba(10,110,122,0.35) 0 6px, transparent 6px 12px);
}

/* ===== 产品展示 ===== */
.cpbox {
    display: grid; grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.cpitem {
    background: #FFFFFF; border: 2px solid #C9E0E5;
    border-radius: 18px; overflow: hidden;
    transition: all 0.3s ease;
    position: relative;
}
.cpitem::before {
    content: ""; position: absolute; top: 0; left: 0; right: 0;
    height: 80px; pointer-events: none;
    background: linear-gradient(180deg, rgba(14,132,145,0.08) 0%, transparent 100%);
    z-index: 1;
}
.cpitem:hover { transform: translateY(-6px); border-color: #0A6E7A; }
.cpimg { width: 100%; height: 240px; overflow: hidden; }
.cpimg img { width: 100%; height: 100%; object-fit: cover; }
.cptxt {
    text-align: center; padding: 14px;
    color: #0A6E7A; font-size: 16px;
    font-weight: 700; letter-spacing: 1px;
    border-top: 1px dashed #C9E0E5;
    background: #FFFFFF;
    display: flex; align-items: center; justify-content: center; gap: 6px;
}
.cptxt i { font-size: 18px; color: #2EAB66; }

/* ===== 优势亮点 ===== */
.ysbox {
    display: grid; grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.ysitem {
    background: #FFFFFF; border: 2px solid #C9E0E5;
    border-radius: 20px; padding: 30px 26px;
    text-align: center; transition: all 0.3s ease;
    position: relative;
}
.ysitem::before {
    content: ""; position: absolute; top: 14px; left: 14px;
    right: 14px; bottom: 14px;
    border: 1px dashed rgba(10,110,122,0.20);
    border-radius: 14px;
    pointer-events: none;
}
.ysitem:hover { background: #0A6E7A; color: #F2FBFC; transform: translateY(-4px); border-color: #0A6E7A; }
.ysitem:hover .ysico { background: #7FD4DC; color: #074E57; border-color: #7FD4DC; }
.ysitem:hover .ystt { color: #F2FBFC; }
.ysitem:hover .ysdc { color: #C7E8EC; }
.ysitem:hover .ysno { color: rgba(242,251,252,0.22); }
.ysno {
    position: absolute; top: 12px; right: 18px;
    font-size: 38px; color: rgba(46,171,102,0.30);
    font-weight: 700; line-height: 1;
    z-index: 2; transition: all 0.3s ease;
}
.ysico {
    width: 64px; height: 64px; border-radius: 50%;
    background: #EAF4F6; color: #0A6E7A;
    display: inline-flex; align-items: center; justify-content: center;
    font-size: 30px; margin: 0 auto 16px;
    border: 2px solid #0E8491;
    position: relative; z-index: 1;
    transition: all 0.3s ease;
}
.ystt {
    font-size: 20px; color: #0B3D45;
    font-weight: 700; margin-bottom: 10px;
    letter-spacing: 1px; position: relative; z-index: 1;
    transition: all 0.3s ease;
}
.ysdc {
    font-size: 14px; color: #5A7A7E;
    line-height: 1.8; position: relative; z-index: 1;
    transition: all 0.3s ease;
}

/* ===== 下载中心 ===== */
.dlbox {
    display: grid; grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.dlitem {
    background: #FFFFFF; border: 2px solid #C9E0E5;
    border-radius: 18px; padding: 28px 24px;
    text-align: center; transition: all 0.3s ease;
    position: relative; overflow: hidden;
}
.dlitem::after {
    content: ""; position: absolute; top: -40px; right: -40px;
    width: 100px; height: 100px; border-radius: 50%;
    background: rgba(10,110,122,0.08);
}
.dlitem:hover { transform: translateY(-4px); border-color: #0A6E7A; }
.dlico {
    width: 60px; height: 60px; border-radius: 16px;
    background: #EAF4F6; color: #0A6E7A;
    display: inline-flex; align-items: center; justify-content: center;
    font-size: 28px; margin: 0 auto 14px;
    border: 2px solid #0E8491;
    position: relative; z-index: 1;
}
.dltt {
    font-size: 19px; color: #0B3D45; font-weight: 700;
    margin-bottom: 6px; letter-spacing: 1px;
    position: relative; z-index: 1;
}
.dlsub {
    font-size: 13px; color: #5A7A7E;
    margin-bottom: 18px; position: relative; z-index: 1;
}
.dlbtn {
    display: inline-flex; align-items: center; gap: 6px;
    background: #0A6E7A; color: #FFFFFF;
    padding: 9px 20px; border-radius: 22px;
    font-weight: 700; font-size: 14px;
    border: 2px solid #0A6E7A;
    transition: all 0.3s ease;
    position: relative; z-index: 1;
}
.dlbtn:hover { background: #0E8491; border-color: #0E8491; }
.dlbtn i { font-size: 16px; }

/* ===== 使用流程 ===== */
.lcbox {
    display: grid; grid-template-columns: repeat(4, 1fr);
    gap: 20px; position: relative;
}
.lcbox::before {
    content: ""; position: absolute; top: 36px; left: 12%;
    right: 12%; height: 2px;
    background: repeating-linear-gradient(90deg, #0E8491 0 8px, transparent 8px 16px);
    z-index: 0;
}
.lcitem {
    text-align: center; position: relative; z-index: 1;
    background: #FFFFFF; border: 2px solid #C9E0E5;
    border-radius: 18px; padding: 26px 18px 24px;
    transition: all 0.3s ease;
}
.lcitem:hover { transform: translateY(-4px); border-color: #0A6E7A; }
.lcno {
    font-size: 32px; color: #0E8491; font-weight: 700;
    letter-spacing: 2px; margin-bottom: 10px;
}
.lcbub {
    width: 24px; height: 24px; border-radius: 50%;
    background: #0A6E7A; border: 3px solid #7FD4DC;
    margin: 0 auto 18px;
}
.lctt {
    font-size: 18px; color: #0B3D45; font-weight: 700;
    margin-bottom: 8px; letter-spacing: 1px;
}
.lcdc { font-size: 13px; color: #5A7A7E; line-height: 1.8; }

/* ===== 常见问题 ===== */
.wtbox {
    max-width: 880px; margin: 0 auto;
    display: flex; flex-direction: column; gap: 14px;
}
.wtitem {
    background: #FFFFFF; border: 2px solid #C9E0E5;
    border-radius: 14px; overflow: hidden;
    transition: all 0.3s ease;
}
.wtitem.active { border-color: #0A6E7A; background: #FFFFFF; }
.wthead {
    display: flex; align-items: center; justify-content: space-between;
    padding: 18px 22px; cursor: pointer;
}
.wtq {
    display: flex; align-items: center; gap: 8px;
    font-size: 16px; color: #0B3D45; font-weight: 700;
    letter-spacing: 1px;
}
.wtq i { color: #0E8491; font-size: 18px; }
.wtico {
    color: #0E8491; font-size: 22px;
    transition: transform 0.3s ease;
}
.wtitem.active .wtico { transform: rotate(180deg); color: #0A6E7A; }
.wtbody {
    max-height: 0; overflow: hidden;
    transition: max-height 0.4s ease, padding 0.4s ease;
    padding: 0 22px;
}
.wtitem.active .wtbody { max-height: 200px; padding: 0 22px 18px; }
.wtbody p {
    font-size: 14px; color: #5A7A7E; line-height: 1.9;
    border-top: 1px dashed #C9E0E5; padding-top: 14px;
}

/* ===== 产品资讯 ===== */
.zxbox {
    display: grid; grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}
.zxitem {
    background: #FFFFFF; border: 2px solid #C9E0E5;
    border-radius: 16px; padding: 24px;
    display: flex; gap: 20px; align-items: flex-start;
    transition: all 0.3s ease;
    position: relative;
    border-left: 6px solid #0A6E7A;
}
.zxitem:hover { transform: translateX(6px); border-color: #0E8491; border-left-color: #0E8491; }
.zximg {
    flex: 0 0 64px; width: 64px; height: 64px;
    border-radius: 14px; background: #EAF4F6;
    color: #0A6E7A; font-size: 30px;
    display: flex; align-items: center; justify-content: center;
    border: 2px solid #0E8491;
}
.zxtxt { flex: 1; }
.zxtt {
    font-size: 17px; color: #0B3D45; font-weight: 700;
    margin-bottom: 4px; letter-spacing: 1px; line-height: 1.5;
}
.zxmt {
    font-size: 12px; color: #0E8491; margin-bottom: 8px;
    letter-spacing: 1px;
}
.zxdc { font-size: 14px; color: #5A7A7E; line-height: 1.8; }

/* ===== 用户评价 ===== */
.pjbox {
    display: grid; grid-template-columns: repeat(3, 1fr);
    gap: 24px; align-items: start;
}
.pjitem {
    background: #FFFFFF; border: 2px solid #C9E0E5;
    border-radius: 18px; padding: 24px 22px;
    transition: all 0.3s ease;
    position: relative;
}
.pjitem::before {
    content: "\201C"; position: absolute; top: 6px; right: 16px;
    font-size: 60px; color: #0E8491; opacity: 0.35;
    font-family: serif; line-height: 1;
}
.pjitem:hover { transform: translateY(-4px); border-color: #0A6E7A; }
.pjhead {
    display: flex; align-items: center; gap: 12px;
    margin-bottom: 14px;
}
.pjav {
    width: 44px; height: 44px; border-radius: 50%;
    background: #EAF4F6; color: #0A6E7A;
    display: flex; align-items: center; justify-content: center;
    font-size: 22px; border: 2px solid #0E8491;
}
.pjnm {
    font-size: 16px; color: #0B3D45; font-weight: 700;
    letter-spacing: 1px;
}
.pjtm { font-size: 12px; color: #0E8491; margin-top: 2px; }
.pjdc { font-size: 14px; color: #5A7A7E; line-height: 1.9; }

/* ===== 页脚 ===== */
.nyft {
    background: #074E57; color: #C7E8EC;
    padding: 50px 0 0; border-top: 3px solid #0E8491;
    position: relative;
}
.nyft::before {
    content: ""; position: absolute; top: 0; left: 0; right: 0;
    height: 60px;
    background: linear-gradient(180deg, rgba(14,132,145,0.18) 0%, transparent 100%);
    pointer-events: none;
}
.fttop {
    display: flex; align-items: flex-start; justify-content: space-between;
    gap: 40px; padding-bottom: 30px;
    border-bottom: 1px dashed rgba(127,212,220,0.35);
    position: relative;
}
.ftbrand { flex: 1; max-width: 360px; }
.ftbrand .nylg { margin-bottom: 14px; }
.ftdc { font-size: 14px; color: #C7E8EC; line-height: 1.9; }
.ftnav {
    display: flex; flex-wrap: wrap; gap: 8px 18px;
    flex: 2; justify-content: center;
    align-content: center;
}
.ftnav a {
    color: #C7E8EC; font-size: 14px;
    padding: 4px 8px; border-radius: 6px;
    transition: all 0.3s ease;
}
.ftnav a:hover { color: #7FD4DC; background: rgba(127,212,220,0.1); }
.ftdl { flex: 0 0 auto; }
.ftbot {
    padding: 18px 0; text-align: center;
    font-size: 13px; color: #7FD4DC;
    display: flex; flex-direction: column; gap: 4px;
}

/* ===== 返回顶部 ===== */
.backtop {
    position: fixed; right: 28px; bottom: 28px;
    width: 48px; height: 48px; border-radius: 50%;
    background: #0A6E7A; color: #FFFFFF;
    display: flex; align-items: center; justify-content: center;
    font-size: 24px; border: 2px solid #7FD4DC;
    opacity: 0; visibility: hidden;
    transition: all 0.3s ease; z-index: 99;
}
.backtop.show { opacity: 1; visibility: visible; }
.backtop:hover { background: #0E8491; border-color: #0E8491; }

/* ===== 移动端 (767px 断点) ===== */
@media (max-width: 767px) {
    body { font-size: 15px; }
    .nynv, .nyrt .nybtn { display: none; }
    .nymenu { display: block; }
    .nybox { height: 60px; gap: 12px; }
    .nylg img { width: 38px; height: 38px; }
    .nylg span { font-size: 17px; }
    .nylg em { font-size: 10px; padding: 1px 6px; }

    .nyban { padding: 40px 0 50px; }
    .banbox { flex-direction: column; gap: 30px; text-align: center; }
    .bantext { order: 2; }
    .banmo { flex: 0 0 auto; order: 1; height: 380px; width: 100%; }
    .momfm { width: 180px; height: 360px; }
    .momtwo { width: 150px; height: 300px; }
    .bantext h1 { font-size: 42px; letter-spacing: 3px; }
    .ban-sub { font-size: 18px; }
    .ban-desc { font-size: 14px; margin: 0 auto 24px; }
    .banbtn { justify-content: center; }
    .banstat { justify-content: center; gap: 18px; flex-wrap: wrap; }
    .banstat b { font-size: 20px; }

    .nysec { padding: 50px 0; }
    .nytit { margin-bottom: 36px; gap: 10px; }
    .tit-txt { font-size: 24px; letter-spacing: 2px; }
    .tit-sub { display: none; }
    .tit-bar { height: 30px; }

    .cpbox { grid-template-columns: 1fr; gap: 18px; }
    .cpimg { height: 200px; }

    .ysbox { grid-template-columns: 1fr; gap: 18px; }
    .ysitem { padding: 24px 20px; }

    .dlbox { grid-template-columns: 1fr; gap: 18px; }

    .lcbox { grid-template-columns: 1fr; gap: 18px; }
    .lcbox::before { display: none; }

    .wtbox { gap: 12px; }
    .wthead { padding: 14px 16px; }
    .wtq { font-size: 15px; }

    .zxbox { grid-template-columns: 1fr; gap: 18px; }
    .zxitem { padding: 18px; gap: 14px; }
    .zximg { flex: 0 0 52px; width: 52px; height: 52px; font-size: 24px; }

    .pjbox { grid-template-columns: 1fr; gap: 18px; }

    .fttop { flex-direction: column; gap: 24px; padding-bottom: 24px; }
    .ftnav { justify-content: flex-start; }
    .ftdl { align-self: flex-start; }
    .backtop { right: 16px; bottom: 16px; width: 42px; height: 42px; font-size: 20px; }
}