/* ===== 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: #1A1F36;
    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; }

.czap { width: 1200px; max-width: 96%; margin: 0 auto; }

/* 通用按钮：蓝底白字 */
.czdb {
    display: inline-flex; align-items: center; gap: 6px;
    background: #1976D2; color: #FFFFFF;
    padding: 10px 22px; border-radius: 22px;
    font-weight: 700; font-size: 15px;
    border: 2px solid #1976D2;
    transition: all 0.3s ease;
}
.czdb:hover { background: #0D47A1; border-color: #0D47A1; }
.czdb i { font-size: 18px; }
.czdb1 { background: #D32F2F; border-color: #D32F2F; }
.czdb1:hover { background: #9A0007; border-color: #9A0007; }
.czlnk {
    display: inline-flex; align-items: center; gap: 6px;
    background: transparent; color: #FFFFFF;
    padding: 10px 22px; border-radius: 22px;
    font-weight: 700; font-size: 15px;
    border: 2px solid rgba(255,255,255,0.7);
    transition: all 0.3s ease;
}
.czlnk:hover { background: rgba(255,255,255,0.15); border-color: #FFFFFF; }

/* ===== 头部 ===== */
.czhd {
    position: sticky; top: 0; z-index: 100;
    background: #FFFFFF;
    border-bottom: 3px solid #1976D2;
}
.czhbox {
    display: flex; align-items: center; justify-content: space-between;
    height: 72px; gap: 24px;
}
.czlg {
    display: flex; align-items: center; gap: 10px;
    color: #1A1F36;
}
.czlg img {
    width: 44px; height: 44px; border-radius: 10px;
    border: 2px solid #1976D2;
    background: #1976D2;
}
.czlg span {
    font-size: 20px; font-weight: 700;
    display: flex; align-items: baseline; gap: 8px;
    letter-spacing: 1px;
}
.czlg em {
    font-style: normal; font-size: 12px;
    color: #D32F2F; font-weight: 400;
    padding: 2px 8px; border: 1px solid #D32F2F;
    border-radius: 10px;
}
.cznv { display: flex; gap: 4px; flex: 1; justify-content: center; }
.cznv a {
    padding: 8px 14px; font-size: 15px;
    color: #5A6373; border-radius: 18px;
    transition: all 0.3s ease;
    position: relative;
}
.cznv a::after {
    content: ""; position: absolute; left: 50%; bottom: 2px;
    width: 0; height: 2px; background: #D32F2F;
    transition: all 0.3s ease; transform: translateX(-50%);
}
.cznv a:hover { color: #1976D2; }
.cznv a:hover::after { width: 50%; }
.czrt { display: flex; align-items: center; gap: 12px; }
.czmenu {
    display: none; color: #1976D2; font-size: 26px;
    padding: 4px;
}
.czmnv {
    display: none;
    flex-direction: column; gap: 4px;
    padding: 12px 20px 20px;
    background: #FFFFFF;
    border-top: 1px solid #C5D5E8;
}
.czmnv a {
    color: #5A6373; padding: 10px 12px;
    border-radius: 8px; font-size: 15px;
}
.czmnv a:hover { background: #F0F4F8; color: #1976D2; }
.czmnv .czdb { color: #FFFFFF; justify-content: center; margin-top: 8px; }

/* ===== 主视觉：纯色深蓝扁平 ===== */
.czan {
    background: #0D47A1;
    position: relative; overflow: hidden;
    padding: 70px 0 80px;
}
.czan::before {
    content: ""; position: absolute; top: 0; right: 0;
    width: 50%; height: 100%;
    background: #1976D2;
    pointer-events: none;
}
.czbx {
    display: flex; align-items: center; gap: 40px;
    position: relative; z-index: 1;
}
.czat { flex: 1; }
.czseal {
    display: inline-flex; align-items: center; gap: 6px;
    color: #FFFFFF; font-size: 13px;
    padding: 5px 14px;
    background: #D32F2F;
    border: 1px solid #D32F2F;
    border-radius: 4px;
    margin-bottom: 22px;
    letter-spacing: 2px;
}
.czat h1 {
    font-size: 66px; color: #FFFFFF;
    letter-spacing: 6px; line-height: 1.1;
    margin-bottom: 14px; font-weight: 700;
}
.cz-sub {
    font-size: 26px; color: #C5D5E8;
    letter-spacing: 2px; margin-bottom: 22px;
}
.cz-desc {
    color: #E3ECF7; font-size: 15px;
    max-width: 480px; margin-bottom: 32px;
    line-height: 1.9;
}
.czbtn { display: flex; gap: 16px; margin-bottom: 40px; }
.czstat { display: flex; gap: 36px; }
.czstat li { display: flex; flex-direction: column; }
.czstat b {
    font-size: 24px; color: #FFFFFF;
    font-weight: 700; letter-spacing: 1px;
}
.czstat span { font-size: 13px; color: #E3ECF7; margin-top: 2px; }

/* 手机 mockup */
.czmo {
    flex: 0 0 380px; position: relative;
    height: 520px; display: flex; justify-content: center;
}
.czmfm {
    position: absolute; top: 0; left: 50%;
    transform: translateX(-50%);
    width: 240px; height: 480px;
    border: 3px solid #FFFFFF;
    border-radius: 28px;
    background: #FFFFFF;
    padding: 10px; overflow: hidden;
}
.czmwall {
    display: block; width: 100%; height: 12px;
    background: #1976D2; border-radius: 6px;
    margin-bottom: 6px;
}
.czmfm img {
    width: 100%; height: calc(100% - 18px);
    object-fit: cover; border-radius: 12px;
}
.czmtwo {
    width: 200px; height: 400px;
    top: 80px; left: 22%;
    transform: rotate(-8deg);
    border-color: #C5D5E8;
    opacity: 0.9;
    z-index: -1;
}

/* ===== 通用 section ===== */
.czse { padding: 72px 0; }
.czbe { background: #F0F4F8; }
.cztt {
    margin-bottom: 50px;
    display: flex; align-items: center; gap: 16px;
    position: relative;
}
.czba {
    width: 8px; height: 36px; border-radius: 4px;
    background: #1976D2;
}
.cztx {
    font-size: 30px; color: #1A1F36;
    letter-spacing: 4px; font-weight: 700;
}
.czbs {
    font-size: 13px; color: #D32F2F;
    letter-spacing: 3px;
    padding: 4px 12px;
    border: 1px solid #D32F2F;
    border-radius: 4px;
}
.cztt::after {
    content: ""; flex: 1; height: 2px;
    background: repeating-linear-gradient(90deg, #1976D2 0 6px, transparent 6px 12px);
}

/* ===== 产品展示 ===== */
.czcq {
    display: grid; grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.czci {
    background: #FFFFFF; border: 2px solid #C5D5E8;
    border-radius: 12px; overflow: hidden;
    transition: all 0.3s ease;
    position: relative;
}
.czci::before {
    content: ""; position: absolute; top: 0; left: 0; right: 0;
    height: 4px;
    background: #1976D2;
    z-index: 2;
}
.czci:hover { transform: translateY(-6px); border-color: #1976D2; }
.czci:hover::before { background: #D32F2F; }
.czciimg { width: 100%; height: 240px; overflow: hidden; }
.czciimg img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.3s ease; }
.czci:hover .czciimg img { transform: scale(1.05); }
.czic {
    text-align: center; padding: 14px;
    color: #1976D2; font-size: 16px;
    font-weight: 700; letter-spacing: 1px;
    border-top: 1px dashed #C5D5E8;
    background: #FFFFFF;
    display: flex; align-items: center; justify-content: center; gap: 6px;
}
.czic i { font-size: 18px; color: #D32F2F; }

/* ===== 优势亮点 ===== */
.czys {
    display: grid; grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.czysc {
    background: #FFFFFF; border: 2px solid #C5D5E8;
    border-radius: 12px; padding: 30px 26px;
    text-align: center; transition: all 0.3s ease;
    position: relative;
}
.czysc::after {
    content: ""; position: absolute; top: 14px; left: 14px;
    right: 14px; bottom: 14px;
    border: 1px dashed rgba(25,118,210,0.25);
    border-radius: 8px;
    pointer-events: none;
}
.czysc:hover { background: #1976D2; border-color: #1976D2; }
.czysc:hover .czyi { background: #FFFFFF; color: #1976D2; border-color: #FFFFFF; }
.czysc:hover .czyt { color: #FFFFFF; }
.czysc:hover .czyd { color: #E3ECF7; }
.czysc:hover .czyn { color: rgba(255,205,210,0.40); }
.czysc:hover::after { border-color: rgba(255,255,255,0.35); }
.czyn {
    position: absolute; top: 12px; right: 18px;
    font-size: 38px; color: rgba(211,47,47,0.30);
    font-weight: 700; line-height: 1;
    z-index: 2; transition: all 0.3s ease;
}
.czyi {
    width: 64px; height: 64px; border-radius: 50%;
    background: #F0F4F8; color: #1976D2;
    display: inline-flex; align-items: center; justify-content: center;
    font-size: 30px; margin: 0 auto 16px;
    border: 2px solid #1976D2;
    transition: all 0.3s ease;
}
.czyt {
    font-size: 20px; color: #1A1F36;
    font-weight: 700; margin-bottom: 10px;
    letter-spacing: 1px;
    transition: all 0.3s ease;
}
.czyd {
    font-size: 14px; color: #5A6373;
    line-height: 1.8;
    transition: all 0.3s ease;
}

/* ===== 下载中心 ===== */
.czdl {
    display: grid; grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.czdli {
    background: #FFFFFF; border: 2px solid #C5D5E8;
    border-radius: 12px; padding: 28px 24px;
    text-align: center; transition: all 0.3s ease;
    position: relative; overflow: hidden;
}
.czdli::after {
    content: ""; position: absolute; top: -40px; right: -40px;
    width: 100px; height: 100px; border-radius: 50%;
    background: rgba(25,118,210,0.10);
}
.czdli:hover { transform: translateY(-4px); border-color: #1976D2; }
.czdlii {
    width: 60px; height: 60px; border-radius: 12px;
    background: #1976D2; color: #FFFFFF;
    display: inline-flex; align-items: center; justify-content: center;
    font-size: 28px; margin: 0 auto 14px;
    border: 2px solid #1976D2;
    position: relative; z-index: 1;
    transition: all 0.3s ease;
}
.czdli:nth-child(2n) .czdlii { background: #D32F2F; border-color: #D32F2F; }
.czdli:nth-child(3n) .czdlii { background: #0D47A1; border-color: #0D47A1; }
.czdlt {
    font-size: 17px; color: #1A1F36; font-weight: 700;
    margin-bottom: 6px; letter-spacing: 0;
    position: relative; z-index: 1;
    min-height: 26px; display: flex; align-items: center; justify-content: center;
}
.czdlb {
    font-size: 13px; color: #5A6373;
    margin-bottom: 18px; position: relative; z-index: 1;
}
.czdlr {
    display: inline-flex; align-items: center; gap: 6px;
    background: #1976D2; color: #FFFFFF;
    padding: 9px 20px; border-radius: 20px;
    font-weight: 700; font-size: 14px;
    border: 2px solid #1976D2;
    transition: all 0.3s ease;
    position: relative; z-index: 1;
}
.czdlr:hover { background: #0D47A1; border-color: #0D47A1; }
.czdlr i { font-size: 16px; }

/* ===== 使用流程 ===== */
.czlc {
    display: grid; grid-template-columns: repeat(4, 1fr);
    gap: 20px; position: relative;
}
.czlc::before {
    content: ""; position: absolute; top: 50px; left: 12%;
    right: 12%; height: 3px;
    background: repeating-linear-gradient(90deg, #1976D2 0 10px, transparent 10px 18px);
    z-index: 0;
}
.czlci {
    text-align: center; position: relative; z-index: 1;
    background: #FFFFFF; border: 2px solid #1976D2;
    border-radius: 12px; padding: 26px 18px 24px;
    transition: all 0.3s ease;
}
.czlci:hover { transform: translateY(-4px); background: #F0F4F8; }
.czln {
    font-size: 30px; color: #D32F2F; font-weight: 700;
    letter-spacing: 2px; margin-bottom: 10px;
}
.czlb {
    width: 28px; height: 28px; border-radius: 50%;
    background: #D32F2F; border: 4px solid #FFFFFF;
    margin: 0 auto 18px;
    outline: 3px solid #1976D2;
    outline-offset: 0;
}
.czlt {
    font-size: 18px; color: #1A1F36; font-weight: 700;
    margin-bottom: 8px; letter-spacing: 1px;
}
.czld { font-size: 13px; color: #5A6373; line-height: 1.8; }

/* ===== 常见问题 ===== */
.czwt {
    max-width: 880px; margin: 0 auto;
    display: flex; flex-direction: column; gap: 14px;
}
.czwti {
    background: #FFFFFF; border: 2px solid #C5D5E8;
    border-radius: 12px; overflow: hidden;
    transition: all 0.3s ease;
}
.czwti.active { border-color: #1976D2; background: #F0F4F8; }
.czwh {
    display: flex; align-items: center; justify-content: space-between;
    padding: 18px 22px; cursor: pointer;
}
.czwq {
    display: flex; align-items: center; gap: 8px;
    font-size: 16px; color: #1A1F36; font-weight: 700;
    letter-spacing: 1px;
}
.czwq i { color: #D32F2F; font-size: 18px; }
.czwi {
    color: #1976D2; font-size: 22px;
    transition: transform 0.3s ease;
}
.czwti.active .czwi { transform: rotate(180deg); color: #D32F2F; }
.czwb {
    max-height: 0; overflow: hidden;
    transition: max-height 0.4s ease, padding 0.4s ease;
    padding: 0 22px;
}
.czwti.active .czwb { max-height: 200px; padding: 0 22px 18px; }
.czwb p {
    font-size: 14px; color: #5A6373; line-height: 1.9;
    border-top: 1px dashed #C5D5E8; padding-top: 14px;
}

/* ===== 产品资讯 ===== */
.czzx {
    display: grid; grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}
.czzxi {
    background: #FFFFFF; border: 2px solid #C5D5E8;
    border-radius: 12px; padding: 24px;
    display: flex; gap: 20px; align-items: flex-start;
    transition: all 0.3s ease;
    border-left: 6px solid #1976D2;
}
.czzxi:nth-child(2n) { border-left-color: #D32F2F; }
.czzxi:nth-child(3n) { border-left-color: #0D47A1; }
.czzxi:hover { transform: translateX(6px); border-color: #1976D2; }
.czzimg {
    flex: 0 0 64px; width: 64px; height: 64px;
    border-radius: 12px; background: #F0F4F8;
    color: #1976D2; font-size: 30px;
    display: flex; align-items: center; justify-content: center;
    border: 2px solid #1976D2;
}
.czztxt { flex: 1; }
.czzt {
    font-size: 17px; color: #1A1F36; font-weight: 700;
    margin-bottom: 4px; letter-spacing: 1px; line-height: 1.5;
}
.czzm {
    font-size: 12px; color: #D32F2F; margin-bottom: 8px;
    letter-spacing: 1px;
}
.czzd { font-size: 14px; color: #5A6373; line-height: 1.8; }

/* ===== 用户评价 ===== */
.czpj {
    display: grid; grid-template-columns: repeat(3, 1fr);
    gap: 24px; align-items: start;
}
.czpji {
    background: #FFFFFF; border: 2px solid #C5D5E8;
    border-radius: 12px; padding: 24px 22px;
    transition: all 0.3s ease;
    position: relative;
}
.czpji::before {
    content: ""; position: absolute; top: 0; left: 0; right: 0;
    height: 4px; border-radius: 10px 10px 0 0;
    background: #1976D2;
}
.czpji:hover { border-color: #1976D2; }
.czpji:hover::before { background: #D32F2F; }
.czpji::after {
    content: "\201D"; position: absolute; top: 6px; right: 16px;
    font-size: 60px; color: #D32F2F; opacity: 0.30;
    font-family: serif; line-height: 1;
}
.czph {
    display: flex; align-items: center; gap: 12px;
    margin-bottom: 14px;
}
.czpa {
    width: 44px; height: 44px; border-radius: 50%;
    background: #F0F4F8; color: #1976D2;
    display: flex; align-items: center; justify-content: center;
    font-size: 22px; border: 2px solid #1976D2;
}
.czpn {
    font-size: 16px; color: #1A1F36; font-weight: 700;
    letter-spacing: 1px;
}
.czpt { font-size: 12px; color: #D32F2F; margin-top: 2px; }
.czpd { font-size: 14px; color: #5A6373; line-height: 1.9; }

/* ===== 页脚 ===== */
.czft {
    background: #0D47A1; color: #E3ECF7;
    padding: 50px 0 0; border-top: 3px solid #1976D2;
    position: relative;
}
.czft::before {
    content: ""; position: absolute; top: 0; left: 0; right: 0;
    height: 4px;
    background: #D32F2F;
    pointer-events: none;
}
.czfttop {
    display: flex; align-items: flex-start; justify-content: space-between;
    gap: 40px; padding-bottom: 30px;
    border-bottom: 1px dashed rgba(255,255,255,0.35);
    position: relative;
}
.czftb { flex: 1; max-width: 360px; }
.czftb .czlg { margin-bottom: 14px; color: #FFFFFF; }
.czftb .czlg img { background: #1976D2; border-color: #FFFFFF; }
.czftb .czlg em { color: #E3ECF7; border-color: #E3ECF7; }
.czftd { font-size: 14px; color: #E3ECF7; line-height: 1.9; }
.czftn {
    display: flex; flex-wrap: wrap; gap: 8px 18px;
    flex: 2; justify-content: center;
    align-content: center;
}
.czftn a {
    color: #E3ECF7; font-size: 14px;
    padding: 4px 8px; border-radius: 6px;
    transition: all 0.3s ease;
}
.czftn a:hover { color: #FFFFFF; background: rgba(255,255,255,0.10); }
.czftdl { flex: 0 0 auto; }
.czftbot {
    padding: 18px 0; text-align: center;
    font-size: 13px; color: #E3ECF7;
    display: flex; flex-direction: column; gap: 4px;
}

/* ===== 返回顶部 ===== */
.cztop {
    position: fixed; right: 28px; bottom: 28px;
    width: 48px; height: 48px; border-radius: 50%;
    background: #1976D2; color: #FFFFFF;
    display: flex; align-items: center; justify-content: center;
    font-size: 24px; border: 2px solid #D32F2F;
    opacity: 0; visibility: hidden;
    transition: all 0.3s ease; z-index: 99;
}
.cztop.show { opacity: 1; visibility: visible; }
.cztop:hover { background: #0D47A1; border-color: #D32F2F; }

/* ===== 移动端 (767px 断点) ===== */
@media (max-width: 767px) {
    body { font-size: 15px; }
    .cznv, .czrt .czdb { display: none; }
    .czmenu { display: block; }
    .czhbox { height: 60px; gap: 12px; }
    .czlg img { width: 38px; height: 38px; }
    .czlg span { font-size: 17px; }
    .czlg em { font-size: 10px; padding: 1px 6px; }

    .czan { padding: 40px 0 50px; }
    .czbx { flex-direction: column; gap: 30px; text-align: center; }
    .czat { order: 2; }
    .czmo { flex: 0 0 auto; order: 1; height: 380px; width: 100%; }
    .czmfm { width: 180px; height: 360px; }
    .czmtwo { width: 150px; height: 300px; }
    .czat h1 { font-size: 42px; letter-spacing: 3px; }
    .cz-sub { font-size: 18px; }
    .cz-desc { font-size: 14px; margin: 0 auto 24px; }
    .czbtn { justify-content: center; }
    .czstat { justify-content: center; gap: 18px; flex-wrap: wrap; }
    .czstat b { font-size: 20px; }

    .czse { padding: 50px 0; }
    .cztt { margin-bottom: 36px; gap: 10px; }
    .cztx { font-size: 24px; letter-spacing: 2px; }
    .czbs { display: none; }
    .czba { height: 30px; }

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

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

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

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

    .czwt { gap: 12px; }
    .czwh { padding: 14px 16px; }
    .czwq { font-size: 15px; }

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

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

    .czfttop { flex-direction: column; gap: 24px; padding-bottom: 24px; }
    .czftn { justify-content: flex-start; }
    .czftdl { align-self: flex-start; }
    .cztop { right: 16px; bottom: 16px; width: 42px; height: 42px; font-size: 20px; }
}