.ibn-page {
    margin: 0;
}

.ibn-banner {
    position: relative;
    overflow: hidden;
    padding: 84px 0;
    background: radial-gradient(circle at 10% 10%, #ffedd4 0%, rgba(255, 237, 212, 0) 45%),
                radial-gradient(circle at 90% 0%, #dce9ff 0%, rgba(220, 233, 255, 0) 40%),
                linear-gradient(135deg, #1f3566 0%, #204b8f 55%, #2d5fb3 100%);
}

.ibn-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(8, 18, 40, 0.2) 0%, rgba(8, 18, 40, 0.45) 100%);
}

.ibn-layout {
    position: relative;
    z-index: 1;
    max-width: 980px;
    display: flex;
    flex-direction: column;
    gap: 30px;
    align-items: center;
}

.ibn-content {
    color: #f4f8ff;
    text-align: left;
    width: 100%;
    max-width: 900px;
    padding: 24px 30px;
    border-radius: 14px;
    background: rgba(9, 21, 48, 0.36);
    border: 1px solid rgba(255, 255, 255, 0.22);
    box-shadow: 0 14px 34px rgba(0, 0, 0, 0.22);
    backdrop-filter: blur(2px);
}

.ibn-content--hero {
    text-align: center;
}

.ibn-title {
    margin: 0 0 12px;
    font-size: 42px;
    line-height: 1.2;
    font-weight: 700;
    color: #ffffff;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.28);
}

.ibn-note {
    margin: 0;
    font-size: 15px;
    line-height: 1.6;
    color: rgba(238, 244, 255, 0.92);
}

.ibn-media {
    display: flex;
    justify-content: center;
}

.ibn-media img {
    width: 100%;
    max-width: 440px;
    border-radius: 14px;
    border: 1px solid rgba(255, 255, 255, 0.5);
    box-shadow: 0 20px 46px rgba(0, 0, 0, 0.35);
}

/* —— 正文区域（浅色底，长文可读） —— */
.ibn-body {
    background: #f3f6fb;
    padding: 48px 0 72px;
}

.ibn-body-inner {
    max-width: 980px;
}

.ibn-section {
    margin-bottom: 48px;
}

.ibn-section:last-child {
    margin-bottom: 0;
}

.ibn-section-title {
    margin: 0 0 24px;
    font-size: 22px;
    font-weight: 700;
    line-height: 1.35;
    color: #1a2d52;
    padding-bottom: 12px;
    border-bottom: 2px solid rgba(32, 75, 143, 0.2);
}

/* 对外宣传双栏 */
.ibn-promo-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 28px;
    align-items: start;
}

.ibn-promo-col {
    background: #ffffff;
    border-radius: 14px;
    padding: 22px 24px;
    border: 1px solid rgba(32, 75, 143, 0.12);
    box-shadow: 0 8px 28px rgba(15, 35, 80, 0.08);
}

.ibn-promo-col p {
    margin: 0 0 14px;
    font-size: 15px;
    line-height: 1.85;
    color: #2c3a52;
}

.ibn-promo-col p:last-child {
    margin-bottom: 0;
}

.ibn-promo-en-title {
    margin: 0 0 14px;
    font-size: 18px;
    font-weight: 700;
    line-height: 1.35;
    color: #1a2d52;
}

/* 中文详细 */
.ibn-detail {
    background: #ffffff;
    border-radius: 14px;
    padding: 28px 28px 36px;
    border: 1px solid rgba(32, 75, 143, 0.12);
    box-shadow: 0 8px 28px rgba(15, 35, 80, 0.08);
}

.ibn-detail .ibn-section-title {
    border-bottom: none;
    padding-bottom: 0;
    margin-bottom: 16px;
}

.ibn-lead {
    margin: 0 0 28px;
    font-size: 16px;
    line-height: 1.95;
    color: #2c3a52;
}

.ibn-subtitle {
    margin: 28px 0 14px;
    font-size: 18px;
    font-weight: 700;
    color: #204b8f;
}

.ibn-subtitle:first-of-type {
    margin-top: 0;
}

.ibn-subheading {
    margin: 20px 0 10px;
    font-size: 16px;
    font-weight: 600;
    color: #2a4a7a;
}

.ibn-detail p {
    margin: 0 0 12px;
    font-size: 15px;
    line-height: 1.9;
    color: #3d4d66;
}

.ibn-list {
    margin: 0 0 8px;
    padding-left: 1.35em;
}

.ibn-list li {
    margin-bottom: 10px;
    font-size: 15px;
    line-height: 1.85;
    color: #3d4d66;
}

.ibn-list li:last-child {
    margin-bottom: 0;
}

.ibn-list strong {
    color: #1a2d52;
    font-weight: 600;
}

@media (max-width: 992px) {
    .ibn-banner {
        padding: 56px 0;
    }

    .ibn-content {
        padding: 18px 20px;
    }

    .ibn-title {
        font-size: 34px;
    }

    .ibn-promo-grid {
        grid-template-columns: 1fr;
    }

    .ibn-body {
        padding: 32px 0 48px;
    }

    .ibn-detail {
        padding: 20px 18px 28px;
    }
}