/* 全站共用：顶部导航 + 页脚（与首页 index.html 视觉一致） */
* { box-sizing: border-box; }

.top-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 30;
    height: 120px;
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    padding: 26px 74px 0 46px;
    background: transparent;
    border-bottom: none;
    backdrop-filter: none;
}
.brand {
    display: flex;
    align-items: center;
    padding-top: 2px;
    flex: 0 0 180px;
}
.brand a {
    display: flex;
    align-items: center;
    line-height: 0;
}
.brand-logo {
    display: block;
    width: 170px;
    height: auto;
}
.brand-logo.footer {
    display: none;
}
.subpage-top .brand-logo.footer {
    display: none !important;
}

/* 内页顶部导航：固定在顶部时纯白底（与示意图一致） */
.top-nav.subpage-top {
    background: #ffffff;
    border-bottom: 1px solid rgba(0, 0, 0, 0.07);
    box-shadow: 0 4px 18px rgba(0, 0, 0, 0.05);
    align-items: center;
    padding-bottom: 20px;
}
.top-nav.subpage-top .brand-logo {
    width: auto;
    max-width: 240px;
    max-height: 54px;
    object-fit: contain;
}
.top-nav.subpage-top .menu {
    padding-top: 6px;
}

/* 内页：下拉仅由 .open 控制，避免仅靠 :hover 一直挡在页面上 */
body.page-sub .top-nav.subpage-top .menu-item .submenu {
    display: none;
    padding: 12px 0 14px;
    min-width: 156px;
    background: #eef0f2;
    border-radius: 8px;
    border: 1px solid rgba(0, 0, 0, 0.06);
    box-shadow: 0 10px 28px rgba(0, 0, 0, 0.12);
}
body.page-sub .top-nav.subpage-top .menu-item:hover .submenu,
body.page-sub .top-nav.subpage-top .menu-item.open .submenu {
    display: block;
}
body.page-sub .top-nav.subpage-top .submenu a {
    padding-left: 18px;
    padding-right: 18px;
    margin-bottom: 0;
}

.menu {
    display: flex;
    gap: 128px;
    margin: 0 auto;
    padding-top: 18px;
}
.menu-item {
    position: relative;
}
.menu-link {
    color: rgba(255, 255, 255, 0.95);
    text-decoration: none;
    font-size: 20px;
    letter-spacing: 1.6px;
    position: relative;
    padding-bottom: 10px;
    display: block;
    font-weight: 500;
}
.menu-link::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    height: 1px;
    background: transparent;
    transition: 0.2s;
}
.menu-link.active::after,
.menu-item.open .menu-link::after {
    background: #58d2ff;
}
.submenu {
    position: absolute;
    top: 44px;
    left: 50%;
    transform: translateX(-50%);
    min-width: 132px;
    padding-top: 14px;
    display: none;
    text-align: center;
}
.menu-item:hover .submenu,
.menu-item.open .submenu {
    display: block;
}
.submenu a {
    display: block;
    font-size: 17px;
    line-height: 2.4;
    letter-spacing: 1.2px;
    color: rgba(255, 255, 255, 0.84);
    text-decoration: none;
    white-space: nowrap;
    margin-bottom: 4px;
}
.submenu a:last-child {
    margin-bottom: 0;
}
.submenu a:hover {
    color: #ffffff;
}
.top-nav.on-light .menu-link {
    color: rgba(34, 34, 34, 0.9);
}
.top-nav.on-light .menu-link.active::after,
.top-nav.on-light .menu-item.open .menu-link::after {
    background: #00b86b;
}
.top-nav.on-light .submenu a {
    color: rgba(45, 45, 45, 0.82);
}
.top-nav.on-light .submenu a:hover {
    color: #111111;
}
.top-nav.on-footer .brand-logo.default {
    display: none;
}
.top-nav.on-footer .brand-logo.footer {
    display: block;
}

/* 内页：可滚动、留白给固定导航 */
body.page-sub {
    margin: 0;
    padding: 0;
    min-height: 100%;
    overflow-x: hidden;
    overflow-y: auto;
    padding-top: 120px;
    background: #fff;
    color: #222;
    font-family: "Microsoft YaHei", Arial, sans-serif;
}
.page-sub .page-main {
    min-height: 40vh;
}
.page-sub .page-main [id] {
    scroll-margin-top: 128px;
}

/* 页脚区块（内页与首页结构相同） */
.footer-section {
    background: #ecf0f1;
    color: #1f2937;
    display: flex;
    align-items: stretch;
    padding: 0;
}
.footer-wrap {
    width: 100%;
    display: flex;
    flex-direction: column;
    min-height: auto;
}
.footer-top-empty {
    flex: 0 0 120px;
    background: #f4f6f7;
}
.footer-nav-block {
    flex: 1;
    background: #dde2e3;
    display: flex;
    align-items: center;
}
.footer-main {
    flex: 1;
    display: grid;
    grid-template-columns: 360px 1fr;
    align-items: center;
    gap: 52px;
    padding: 80px 78px 56px;
}
.footer-brand a {
    display: inline-block;
    line-height: 0;
}
.footer-brand img {
    width: 250px;
    height: auto;
    display: block;
}
.footer-nav-cols {
    display: grid;
    grid-template-columns: repeat(5, minmax(90px, 1fr));
    gap: 26px;
    align-items: start;
}
.footer-col h4 {
    margin: 0 0 22px;
    font-size: 27px;
    color: #1f2937;
    font-weight: 600;
}
.footer-col h4 a {
    color: inherit;
    text-decoration: none;
}
.footer-col h4 a:hover {
    color: #06a84c;
}
.footer-col a {
    display: block;
    margin-bottom: 14px;
    color: rgba(31, 41, 55, 0.78);
    text-decoration: none;
    font-size: 19px;
}
.footer-col a:last-child {
    margin-bottom: 0;
}
.footer-col a:hover {
    color: #06a84c;
}
.footer-bar {
    background: #06a84c;
    color: #ffffff;
    font-size: 14px;
    line-height: 1.9;
    padding: 12px 60px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
    flex-wrap: wrap;
}
.footer-links {
    display: flex;
    gap: 18px;
}
.footer-links a {
    color: #ffffff;
    text-decoration: none;
}
.footer-links a:hover {
    text-decoration: underline;
}
/* ICP：保持与栏内正文一致，无默认超链接配色/下划线 */
.footer-bar .footer-icp:any-link,
.footer-bar .footer-icp:link,
.footer-bar .footer-icp:visited,
.footer-bar .footer-icp:hover,
.footer-bar .footer-icp:active {
    color: inherit;
    text-decoration: none;
    font-size: inherit;
    font-weight: inherit;
    line-height: inherit;
}

/* ---------- 移动端导航汉堡（首页 + 内页共用） ---------- */
.nav-toggle {
    display: none;
    position: relative;
    z-index: 35;
    width: 44px;
    height: 44px;
    margin: 4px 0 0 auto;
    padding: 0;
    border: 0;
    background: transparent;
    cursor: pointer;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
    display: block;
    width: 22px;
    height: 2px;
    border-radius: 1px;
    transition: transform 0.2s, opacity 0.2s;
}
.top-nav:not(.subpage-top) .nav-toggle span,
.top-nav:not(.subpage-top) .nav-toggle span::before,
.top-nav:not(.subpage-top) .nav-toggle span::after {
    background: rgba(255, 255, 255, 0.92);
}
.top-nav.subpage-top .nav-toggle span,
.top-nav.subpage-top .nav-toggle span::before,
.top-nav.subpage-top .nav-toggle span::after,
.top-nav.on-light:not(.nav-open) .nav-toggle span,
.top-nav.on-light:not(.nav-open) .nav-toggle span::before,
.top-nav.on-light:not(.nav-open) .nav-toggle span::after {
    background: rgba(34, 34, 34, 0.88);
}
.top-nav.nav-open .nav-toggle span,
.top-nav.nav-open .nav-toggle span::before,
.top-nav.nav-open .nav-toggle span::after {
    background: rgba(34, 34, 34, 0.88);
}
.nav-toggle span {
    position: relative;
}
.nav-toggle span::before,
.nav-toggle span::after {
    content: "";
    position: absolute;
    left: 0;
}
.nav-toggle span::before {
    top: -7px;
}
.nav-toggle span::after {
    top: 7px;
}
.top-nav.nav-open .nav-toggle span {
    background: transparent;
}
.top-nav.nav-open .nav-toggle span::before {
    top: 0;
    transform: rotate(45deg);
}
.top-nav.nav-open .nav-toggle span::after {
    top: 0;
    transform: rotate(-45deg);
}

/* ---------- 通用：中大型屏收紧 ---------- */
@media (max-width: 1400px) {
    .top-nav {
        padding: 22px clamp(22px, 4vw, 56px) 0 clamp(22px, 3.5vw, 46px);
    }
    .menu {
        gap: clamp(40px, 6vw, 100px);
    }
    .menu-link {
        font-size: clamp(17px, 1.55vw, 20px);
    }
    .footer-main {
        padding-left: clamp(24px, 4vw, 78px);
        padding-right: clamp(24px, 4vw, 78px);
        gap: clamp(28px, 4vw, 52px);
    }
    .footer-col h4 {
        font-size: clamp(21px, 2.5vw, 27px);
    }
    .footer-col a {
        font-size: clamp(16px, 1.5vw, 19px);
    }
}

@media (max-width: 1100px) {
    .menu {
        gap: 40px;
        flex-wrap: wrap;
        justify-content: flex-end;
        padding-right: 8px;
    }
    .top-nav.subpage-top {
        padding-right: clamp(14px, 3vw, 40px);
    }
    .footer-main {
        grid-template-columns: 1fr;
        padding: 48px 28px 40px;
    }
    .footer-nav-cols {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 22px;
    }
    .footer-brand img {
        width: clamp(190px, 42vw, 250px);
    }
}

@media (max-width: 900px) {
    .footer-bar {
        padding: 14px clamp(14px, 4vw, 40px);
        font-size: 13px;
    }
}

/* ---------- 平板 / 手机 <1024：内页顶栏抽屉 + 页脚单列/双列 ---------- */
@media (max-width: 1023px) {
    body.page-sub {
        padding-top: 76px;
    }

    body.page-sub .page-main [id] {
        scroll-margin-top: 92px;
    }

    body.page-sub > .top-nav.subpage-top {
        flex-wrap: wrap;
        align-items: flex-start;
        height: auto;
        min-height: 64px;
        padding: 12px clamp(14px, 4vw, 22px) 12px;
    }

    body.page-sub > .top-nav.subpage-top .brand {
        flex: 1 1 auto;
        flex-basis: 0;
        min-width: 0;
        padding-top: 4px;
        max-width: calc(100% - 54px);
    }

    body.page-sub > .top-nav.subpage-top .brand-logo {
        max-width: min(210px, 56vw);
        max-height: 48px;
    }

    body.page-sub .nav-toggle {
        display: inline-flex;
        margin-left: auto;
        margin-right: -4px;
    }

    body.page-sub > .top-nav.subpage-top #menu.menu {
        display: none;
        width: 100%;
        flex-direction: column;
        gap: 0;
        margin: 0;
        padding: 12px 0 8px;
        border-top: 1px solid rgba(0, 0, 0, 0.08);
    }

    body.page-sub > .top-nav.subpage-top.nav-open #menu.menu {
        display: flex;
    }

    body.page-sub > .top-nav.subpage-top.nav-open .menu-item .submenu {
        display: block;
    }

    body.page-sub > .top-nav.subpage-top .menu-item {
        width: 100%;
        border-bottom: 1px solid rgba(0, 0, 0, 0.06);
    }

    body.page-sub > .top-nav.subpage-top .menu-link {
        padding: 14px 4px;
        font-size: 17px;
    }

    body.page-sub .top-nav.subpage-top .menu-item .submenu {
        position: static;
        transform: none;
        margin-left: 0;
        margin-top: 0;
        border-radius: 0;
        box-shadow: none;
        border: 0;
        background: rgba(0, 0, 0, 0.04);
        padding: 8px 0 10px;
    }

    body.page-sub .top-nav.subpage-top .submenu a {
        padding-left: 16px;
        padding-right: 16px;
        font-size: 15px;
        text-align: left;
        white-space: normal;
        line-height: 1.6;
    }

    .footer-top-empty {
        flex: 0 0 56px;
    }

    .footer-main {
        padding: 36px clamp(14px, 4vw, 28px) 28px !important;
    }

    #fullpage .footer-main {
        padding: 36px clamp(14px, 4vw, 28px) 28px !important;
    }

    .footer-nav-cols {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 20px clamp(14px, 3vw, 26px);
    }

    .footer-col h4 {
        margin-bottom: 14px;
        font-size: 20px;
    }

    .footer-col a {
        font-size: 16px;
        margin-bottom: 10px;
    }

    body.home #fullpage .footer-wrap {
        min-height: auto;
    }

    body.home #fullpage .footer-top-empty {
        flex: 0 0 24px;
    }

    body.home #fullpage .footer-main {
        padding: 40px 20px 32px !important;
    }

    body.home > .top-nav .nav-toggle {
        display: inline-flex;
    }
}

@media (max-width: 600px) {
    .footer-nav-cols {
        grid-template-columns: 1fr;
    }

    .footer-bar {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }

    .footer-links {
        flex-wrap: wrap;
    }

    body.page-sub > .top-nav.subpage-top .brand-logo {
        max-width: min(180px, 62vw);
    }
}