@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;600;700&display=swap');
body {
    font-family: 'Inter', 'Microsoft YaHei', sans-serif;
    scroll-behavior: smooth;
    margin: 0;
}
.site-brand { text-decoration: none; }
.site-emblem {
    flex-shrink: 0;
    height: 2.35rem;
    width: auto;
    max-width: 7.5rem;
    object-fit: contain;
}
@media (min-width: 640px) {
    .site-emblem { height: 2.65rem; max-width: 8.75rem; }
}
.site-logo {
    flex-shrink: 0;
    filter: drop-shadow(0 2px 6px rgba(14, 165, 233, 0.35));
    transition: transform 0.25s ease;
}
.site-brand:hover .site-logo { transform: scale(1.06) rotate(-2deg); }
.site-name {
    background: linear-gradient(120deg, #0f172a 0%, #0369a1 42%, #0ea5e9 58%, #0f172a 100%);
    background-size: 200% auto;
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    letter-spacing: 0.04em;
    line-height: 1.2;
    min-width: 0;
    font-size: 1.125rem;
}
@media (min-width: 640px) {
    .site-name {
        font-size: 1.25rem;
    }
}
.site-name-short {
    display: none;
}
body.lang-en .site-name-full {
    display: none;
}
body.lang-en .site-name-short {
    display: none;
}
@media (max-width: 1023px) {
    body.lang-en .site-name-short {
        display: inline-flex;
        flex: 1 1 auto;
        align-items: center;
        justify-content: center;
        min-width: 0;
        font-size: 1.15rem;
        letter-spacing: 0.08em;
        white-space: nowrap;
        line-height: 1;
        position: static;
        transform: none;
    }
    body.lang-en .site-brand {
        flex: 0 0 auto;
        margin-right: 0;
    }
}
@media (min-width: 640px) and (max-width: 1023px) {
    body.lang-en .site-name-short {
        font-size: 1.25rem;
    }
}
@media (min-width: 1024px) {
    body.lang-en .site-name-full {
        display: inline;
        font-size: 0.95rem;
        letter-spacing: 0;
        white-space: nowrap;
    }
    body.lang-en .site-name-short {
        display: none;
    }
}
@media (min-width: 1280px) {
    body.lang-en .site-name-full {
        font-size: 1.05rem;
    }
}
body.lang-en nav > div {
    padding-left: 0.75rem;
}
@media (min-width: 640px) {
    body.lang-en nav > div {
        padding-left: 1rem;
    }
}
@media (min-width: 1024px) {
    body.lang-en nav > div {
        padding-left: 1.25rem;
    }
}
body.lang-en .site-brand {
    gap: 0.45rem;
}
body.lang-en .site-emblem {
    max-width: 6.25rem;
}
.mobile-drawer {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: 80vw;
    max-width: 320px;
    background: #fff;
    z-index: 60;
    transform: translateX(100%);
    transition: transform 0.35s cubic-bezier(0.4,0,0.2,1);
    box-shadow: -10px 0 30px rgba(0,0,0,0.1);
    display: flex;
    flex-direction: column;
}
.mobile-drawer.open { transform: translateX(0); }
.drawer-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: 55;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s;
}
.drawer-overlay.open { opacity: 1; visibility: visible; }
.nav-active { color: #0ea5e9 !important; font-weight: 700; }
.nav-link.nav-active { position: relative; }
.nav-link.nav-active::after {
    content: '';
    position: absolute;
    left: 0;
    right: 0;
    bottom: -6px;
    height: 2px;
    background: #0ea5e9;
    border-radius: 1px;
}

.join-poster {
    position: relative;
    overflow: hidden;
    border-radius: 0;
    min-height: 100vh;
    min-height: 100dvh;
    background: #0f172a;
    box-shadow: none;
}
.join-poster::before {
    content: "";
    position: absolute;
    inset: 0;
    background: url('../images/join-bg-huaxi-tech.png') center center / cover no-repeat;
    filter: contrast(1.14) saturate(1.06);
    pointer-events: none;
    z-index: 0;
}
@media (max-width: 639px) {
    .join-poster::before {
        background-position: center 38%;
    }
}
.join-poster::after {
    content: "";
    position: absolute;
    inset: 0;
    background:
        radial-gradient(58% 72% at 52% 34%, rgba(14, 165, 233, 0.12) 0%, rgba(14, 165, 233, 0.02) 58%, transparent 78%),
        linear-gradient(95deg, rgba(15, 23, 42, 0.44) 0%, rgba(3, 105, 161, 0.14) 48%, rgba(15, 23, 42, 0.42) 100%),
        linear-gradient(180deg,
            #0f172a 0%,
            rgba(15, 23, 42, 0.74) 2%,
            rgba(15, 23, 42, 0.18) 8%,
            rgba(15, 23, 42, 0.04) 14%,
            rgba(15, 23, 42, 0.04) 84%,
            rgba(15, 23, 42, 0.22) 91%,
            rgba(15, 23, 42, 0.78) 97%,
            #0f172a 100%);
    pointer-events: none;
    z-index: 1;
}
.join-poster > * { position: relative; z-index: 2; }
.join-poster-inner {
    min-height: 100vh;
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}
.join-poster-main {
    width: 100%;
    max-width: 72rem;
    margin: 0 auto;
    padding: 5.5rem 1rem 1.5rem;
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
}
.join-poster-title {
    text-shadow:
        0 3px 20px rgba(2, 6, 23, 0.65),
        0 0 32px rgba(14, 165, 233, 0.12);
}
.join-features {
    position: relative;
    max-width: 64rem;
    margin: 2.5rem auto 0;
    padding: 1.5rem 0;
}
.join-features::before,
.join-features::after {
    content: "";
    position: absolute;
    left: 8%;
    right: 8%;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(125, 211, 252, 0.28), transparent);
}
.join-features::before { top: 0; }
.join-features::after { bottom: 0; }
.join-feature {
    padding: 0.75rem 1rem;
}
.join-feature-icon {
    color: #bae6fd;
    background: rgba(14, 165, 233, 0.12);
    border: 1px solid rgba(125, 211, 252, 0.28);
    box-shadow:
        inset 0 0 18px rgba(14, 165, 233, 0.08),
        0 0 24px rgba(14, 165, 233, 0.08);
}
.join-contact-icon {
    color: #7dd3fc;
}
.join-poster-contact {
    width: min(calc(100% - 2rem), 56rem);
    margin-top: auto;
    margin-left: auto;
    margin-right: auto;
    padding: 1.5rem 1rem 1.75rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    background: transparent;
    border: none;
    text-align: center;
    text-shadow: 0 6px 22px rgba(0,0,0,0.35);
    transform: translateY(-2.5rem);
}
.join-poster-contact::before {
    content: "";
    width: min(78%, 46rem);
    height: 1px;
    margin-bottom: 0.55rem;
    background: linear-gradient(90deg, transparent, rgba(125, 211, 252, 0.38), transparent);
}
@media (min-width: 640px) {
    .join-poster-main { padding: 6rem 2rem 1.5rem; }
    .join-features {
        margin-top: 3rem;
        padding: 1.75rem 0;
    }
    .join-feature + .join-feature {
        border-left: 1px solid rgba(186, 230, 253, 0.16);
    }
    .join-poster-contact {
        padding: 1.4rem 2rem 2.5rem;
        gap: 0.8rem;
        transform: translateY(-3.25rem);
    }
}