/* ============================================================
   前台公共样式 — 深色玻璃风 + 移动端优先优化
   ============================================================ */

*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html, body {
    min-height: 100%;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI',
        'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    -webkit-font-smoothing: antialiased;
}

body {
    background-color: #0d0d1a;
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    background-repeat: no-repeat;
    position: relative;
    color: #fff;
}

body::before {
    content: '';
    position: fixed;
    inset: 0;
    background: linear-gradient(
        180deg,
        rgba(10, 5, 30, 0.66) 0%,
        rgba(20, 10, 50, 0.56) 45%,
        rgba(7, 5, 20, 0.82) 100%
    );
    z-index: 0;
    pointer-events: none;
}

.site-shell {
    position: relative;
    z-index: 1;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.site-main {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 28px 16px 20px;
}

.site-main-result {
    padding-top: 18px;
    padding-bottom: 28px;
}

.container {
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.auth-container,
.flow-container {
    max-width: 460px;
}

.page3-container {
    max-width: 900px;
}

.logo-wrap {
    margin-bottom: 24px;
    text-align: center;
}

.logo-wrap img {
    height: 160px;
    width: auto;
    max-width: 90vw;
    object-fit: contain;
    filter: drop-shadow(0 0 12px rgba(168, 85, 247, 0.6));
}

.logo-fallback {
    font-size: 2rem;
    font-weight: 800;
    background: linear-gradient(135deg, #e879f9, #818cf8, #38bdf8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 2px;
    filter: drop-shadow(0 0 20px rgba(168, 85, 247, 0.5));
}

.page-title {
    font-size: 1.55rem;
    font-weight: 700;
    color: #fff;
    text-align: center;
    margin-bottom: 28px;
    letter-spacing: 1px;
    text-shadow: 0 0 20px rgba(168, 85, 247, 0.4);
}

.glass-card {
    width: 100%;
    background: rgba(255, 255, 255, 0.07);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border: 1px solid rgba(255, 255, 255, 0.14);
    border-radius: 22px;
    padding: 32px 28px;
    box-shadow:
        0 8px 32px rgba(0, 0, 0, 0.45),
        0 0 0 1px rgba(255,255,255,0.04) inset;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-bottom: 22px;
}

.input-wrap {
    position: relative;
    display: flex;
    align-items: center;
}

.input-icon {
    position: absolute;
    left: 16px;
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.45);
    pointer-events: none;
    z-index: 1;
    line-height: 1;
}

.field-input {
    width: 100%;
    min-height: 56px;
    padding: 0 16px 0 48px;
    background: rgba(255, 255, 255, 0.1);
    border: 1.5px solid rgba(255, 255, 255, 0.18);
    border-radius: 12px;
    color: #fff;
    font-size: 0.95rem;
    outline: none;
    transition: border-color 0.25s, background 0.25s, box-shadow 0.25s;
    -webkit-text-fill-color: #fff;
}

.field-input::placeholder {
    color: rgba(255, 255, 255, 0.38);
}

.field-input:focus {
    border-color: rgba(168, 85, 247, 0.7);
    background: rgba(168, 85, 247, 0.12);
    box-shadow: 0 0 0 3px rgba(168, 85, 247, 0.15);
}

.field-input:-webkit-autofill,
.field-input:-webkit-autofill:hover,
.field-input:-webkit-autofill:focus {
    -webkit-box-shadow: 0 0 0px 1000px rgba(30,20,60,0.95) inset;
    -webkit-text-fill-color: #fff !important;
    transition: background-color 5000s ease-in-out 0s;
}

.btn-main {
    width: 100%;
    min-height: 54px;
    border: none;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    letter-spacing: 0.5px;
    transition: opacity 0.2s, transform 0.15s, box-shadow 0.2s;
    position: relative;
    overflow: hidden;
}

.btn-main::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(255,255,255,0.08) 0%, transparent 100%);
    pointer-events: none;
}

.btn-primary-grad {
    background: linear-gradient(135deg, #9333ea 0%, #7c3aed 50%, #6d28d9 100%);
    color: #fff;
    box-shadow: 0 4px 20px rgba(147, 51, 234, 0.45);
}

.btn-primary-grad:hover {
    opacity: 0.92;
    box-shadow: 0 6px 28px rgba(147, 51, 234, 0.6);
    transform: translateY(-1px);
}

.btn-primary-grad:active { transform: scale(0.98); }

.btn-secondary-grad {
    background: linear-gradient(135deg, rgba(255,255,255,0.12), rgba(255,255,255,0.06));
    color: rgba(255,255,255,0.85);
    border: 1.5px solid rgba(255,255,255,0.18);
    box-shadow: 0 2px 12px rgba(0,0,0,0.25);
}

.btn-secondary-grad:hover {
    background: linear-gradient(135deg, rgba(255,255,255,0.18), rgba(255,255,255,0.1));
    opacity: 0.95;
    transform: translateY(-1px);
}

.btn-secondary-grad:active { transform: scale(0.98); }

.btn-main:disabled,
.btn-main.disabled {
    opacity: 0.35;
    cursor: not-allowed;
    transform: none !important;
    box-shadow: none !important;
    background: rgba(255,255,255,0.08) !important;
    color: rgba(255,255,255,0.4) !important;
    border: 1.5px solid rgba(255,255,255,0.1);
}

.announcement {
    background: rgba(168, 85, 247, 0.15);
    border: 1px solid rgba(168, 85, 247, 0.35);
    border-radius: 12px;
    padding: 14px 16px;
    color: rgba(255, 255, 255, 0.9);
    font-size: 0.875rem;
    line-height: 1.6;
    margin-bottom: 20px;
    display: flex;
    gap: 10px;
    align-items: flex-start;
}

.announcement-icon { font-size: 1rem; flex-shrink: 0; margin-top: 1px; }

.btn-group {
    display: flex;
    flex-direction: column;
    gap: 12px;
    width: 100%;
}

.modal-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(6px);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.modal-overlay.show { display: flex; }

.modal-box {
    background: rgba(18, 10, 40, 0.96);
    border: 1px solid rgba(168, 85, 247, 0.35);
    border-radius: 20px;
    padding: 32px 28px;
    width: 100%;
    max-width: 360px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.7), 0 0 0 1px rgba(168,85,247,0.2) inset;
    animation: modalIn .25s ease;
}

@keyframes modalIn {
    from { opacity: 0; transform: scale(.92) translateY(10px); }
    to   { opacity: 1; transform: scale(1) translateY(0); }
}

.modal-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 6px;
    text-align: center;
}

.modal-sub {
    font-size: .8rem;
    color: rgba(255,255,255,0.45);
    text-align: center;
    margin-bottom: 22px;
}

.captcha-row {
    display: flex;
    gap: 12px;
    align-items: center;
    margin-bottom: 16px;
}

.captcha-img {
    border-radius: 8px;
    cursor: pointer;
    flex-shrink: 0;
    border: 1.5px solid rgba(255,255,255,0.15);
    height: 50px;
}

.captcha-input-wrap {
    flex: 1;
    position: relative;
}

.captcha-input {
    width: 100%;
    min-height: 50px;
    background: rgba(255,255,255,0.1);
    border: 1.5px solid rgba(255,255,255,0.18);
    border-radius: 10px;
    color: #fff;
    font-size: 1.1rem;
    letter-spacing: 6px;
    text-align: center;
    outline: none;
    text-transform: uppercase;
    transition: border-color .2s;
}

.captcha-input:focus { border-color: rgba(168,85,247,0.7); }
.captcha-input::placeholder { letter-spacing: 1px; font-size: .85rem; color: rgba(255,255,255,0.3); }

.captcha-hint {
    font-size: .75rem;
    color: rgba(255,255,255,0.4);
    text-align: center;
    margin-bottom: 18px;
}

.modal-btns { display: flex; gap: 10px; }
.modal-btns .btn-main { font-size: .9rem; min-height: 48px; }

.captcha-error {
    font-size: .82rem;
    color: #f87171;
    text-align: center;
    margin-bottom: 10px;
    min-height: 20px;
}

.toast {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%) translateY(-80px);
    background: rgba(18, 10, 40, 0.95);
    border: 1px solid rgba(168,85,247,0.35);
    color: #fff;
    padding: 12px 24px;
    border-radius: 40px;
    font-size: .9rem;
    font-weight: 500;
    z-index: 9999;
    white-space: nowrap;
    max-width: calc(100vw - 24px);
    overflow: hidden;
    text-overflow: ellipsis;
    box-shadow: 0 8px 30px rgba(0,0,0,0.5);
    transition: transform .3s cubic-bezier(0.34, 1.56, 0.64, 1), opacity .3s;
    opacity: 0;
    pointer-events: none;
}

.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

.toast.error { border-color: rgba(239,68,68,0.5); background: rgba(60,5,10,0.95); }
.toast.success { border-color: rgba(34,197,94,0.5); background: rgba(5,40,10,0.95); }

.page-switcher {
    width: 100%;
    max-width: 460px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 18px;
}

.switch-tab {
    min-height: 50px;
    border: 1px solid rgba(255,255,255,0.14);
    border-radius: 14px;
    background: rgba(255,255,255,0.05);
    color: rgba(255,255,255,0.62);
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    transition: all .2s ease;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
}

.switch-tab:hover {
    color: #fff;
    border-color: rgba(168,85,247,0.28);
    background: rgba(255,255,255,0.08);
}

.switch-tab.active {
    color: #fff;
    background: linear-gradient(135deg, rgba(147,51,234,0.28), rgba(99,102,241,0.22));
    border-color: rgba(168,85,247,0.38);
    box-shadow: 0 8px 24px rgba(147, 51, 234, 0.18);
}

.panel { display: none; }
.panel.active { display: block; }

.page-tip {
    margin-top: 16px;
    color: rgba(255,255,255,0.52);
    font-size: .82rem;
    line-height: 1.8;
    text-align: center;
}

.page3-actions {
    width: min(92vw, 720px);
    display: flex;
    justify-content: flex-end;
    margin-bottom: 14px;
}

.btn-logout {
    min-width: 112px;
    min-height: 42px;
    padding: 0 16px;
    border-radius: 999px;
    border: 1px solid rgba(255,255,255,0.15);
    background: rgba(255,255,255,0.08);
    color: rgba(255,255,255,0.92);
    font-size: .9rem;
    font-weight: 700;
    cursor: pointer;
    transition: .2s ease;
}

.btn-logout:hover {
    background: rgba(255,255,255,0.14);
    transform: translateY(-1px);
}

.btn-logout:disabled {
    opacity: .55;
    cursor: not-allowed;
    transform: none;
}

.page3-img-wrap {
    width: min(92vw, 720px);
    min-height: min(50vh, 520px);
    border-radius: 22px;
    overflow: hidden;
    box-shadow: 0 10px 44px rgba(0,0,0,0.6);
    border: 1.5px solid rgba(255,255,255,0.12);
    user-select: none;
    pointer-events: none;
    background: rgba(8, 7, 25, 0.82);
    display: flex;
    align-items: center;
    justify-content: center;
}

.page3-img-wrap img {
    width: 100%;
    max-height: 56vh;
    display: block;
    pointer-events: none;
    user-select: none;
    -webkit-user-drag: none;
    object-fit: contain;
}

.page3-placeholder {
    width: 100%;
    min-height: min(50vh, 520px);
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg,#1e1040,#2d1b69);
}

.page3-placeholder span {
    font-size: 3rem;
    opacity: .3;
}

.page3-title {
    color: rgba(255,255,255,0.92);
    font-size: 1rem;
    text-align: center;
    margin-top: 18px;
    font-weight: 600;
    letter-spacing: .5px;
}

.page3-code-hint {
    color: rgba(255,255,255,0.48);
    font-size: .84rem;
    text-align: center;
    margin-top: 8px;
    line-height: 1.8;
    max-width: 720px;
}

.site-footer {
    width: 100%;
    padding: 0 16px 18px;
}

.site-footer-inner {
    max-width: 1120px;
    margin: 0 auto;
    background: linear-gradient(180deg, rgba(3, 6, 28, 0.9), rgba(6, 8, 34, 0.92));
    border: 1px solid rgba(255,255,255,0.06);
    box-shadow: 0 12px 40px rgba(0,0,0,0.35);
    border-radius: 22px;
    padding: 28px 24px 20px;
}

.site-footer-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.5fr) minmax(160px, .8fr) minmax(200px, 1fr) minmax(140px, .7fr);
    gap: 24px;
}

.footer-brand-col,
.footer-col {
    min-width: 0;
}

.footer-logo-wrap {
    margin-bottom: 18px;
}

.footer-logo {
    height: 96px;
    width: auto;
    max-width: min(360px, 100%);
    object-fit: contain;
}

.footer-logo-fallback {
    display: inline-block;
    font-size: 1.8rem;
    font-weight: 800;
    background: linear-gradient(135deg, #fff, #a5b4fc);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.footer-desc {
    color: rgba(255,255,255,0.78);
    font-size: .95rem;
    line-height: 1.9;
    max-width: 420px;
}

.footer-title {
    font-size: 1.12rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 18px;
}

.footer-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-link,
.footer-link-text {
    color: rgba(255,255,255,0.82);
    text-decoration: none;
    font-size: .98rem;
    line-height: 1.5;
}

.footer-link:hover {
    color: #fff;
}

.footer-contact {
    color: rgba(255,255,255,0.84);
    text-decoration: none;
    display: flex;
    flex-direction: column;
    gap: 4px;
    line-height: 1.5;
}

.footer-contact strong {
    font-size: 1rem;
    font-weight: 700;
    word-break: break-word;
}

.footer-contact span,
.footer-company-meta {
    color: rgba(255,255,255,0.6);
    font-size: .88rem;
    line-height: 1.7;
}

.footer-company-name {
    color: rgba(255,255,255,0.86);
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.footer-divider {
    height: 1px;
    background: rgba(255,255,255,0.08);
    margin: 28px 0 18px;
}

.footer-copy {
    color: rgba(255,255,255,0.55);
    font-size: .92rem;
    line-height: 1.6;
}

@media (max-width: 900px) {
    .site-footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 640px) {
    .site-main {
        padding: 18px 12px 16px;
    }

    .glass-card {
        padding: 24px 18px;
        border-radius: 18px;
    }

    .field-input {
        min-height: 52px;
        font-size: .92rem;
    }

    .btn-main {
        min-height: 50px;
        font-size: .96rem;
    }

    .page-title {
        font-size: 1.32rem;
        margin-bottom: 18px;
    }

    .page-switcher {
        gap: 10px;
        margin-bottom: 14px;
    }

    .switch-tab {
        min-height: 46px;
        font-size: .95rem;
    }

    .captcha-row {
        flex-direction: column;
        align-items: stretch;
    }

    .captcha-img,
    .captcha-input {
        width: 100%;
    }

    .modal-box {
        padding: 24px 18px;
        border-radius: 18px;
    }

    .modal-btns {
        flex-direction: column;
    }

    .page3-actions,
    .page3-img-wrap {
        width: 100%;
    }

    .page3-img-wrap {
        min-height: 50vh;
        border-radius: 18px;
    }

    .page3-img-wrap img {
        max-height: 50vh;
    }

    .page3-placeholder {
        min-height: 50vh;
    }

    .page3-title {
        font-size: .96rem;
        margin-top: 16px;
    }

    .page3-code-hint {
        font-size: .8rem;
        padding: 0 2px;
    }

    .toast {
        top: 14px;
        font-size: .84rem;
        padding: 11px 16px;
    }

    .site-footer {
        padding: 0 12px 12px;
    }

    .site-footer-inner {
        padding: 22px 16px 16px;
        border-radius: 18px;
    }

    .site-footer-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .footer-title {
        font-size: 1rem;
        margin-bottom: 12px;
    }

    .footer-desc,
    .footer-link,
    .footer-link-text,
    .footer-contact strong,
    .footer-copy {
        font-size: .92rem;
    }

    .footer-contact span,
    .footer-company-meta {
        font-size: .82rem;
    }

    .footer-divider {
        margin: 20px 0 14px;
    }
}