body {
    margin: 0;
    padding: 0;
    width: 100vw;
    height: 100vh;
    overflow: hidden;
    font-family: "Microsoft YaHei", "Heiti SC", sans-serif;
}

.ppt-container {
    width: 100%;
    height: 100%;
}

.slide {
    width: 100%;
    height: 100%;
    background-color: #ffffff;
    background-image: url('./AH-CoverTemplateBG.webp');
    background-size: 100% 100%;
    background-position: center;
    position: relative;
    overflow: hidden;
}

/* --- Left Side Content --- */
.content-section {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2;
    box-sizing: border-box;
    padding: 0 6vw;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

/* Main Titles */
.main-title-area {
    margin-bottom: 5vh;
    margin-left: 1.5vw;
}

.main-title {
    font-size: 4vw; /* 原 5vw */
    color: #002855;
    margin: 0;
    font-weight: 900;
    letter-spacing: 0.1em;
}

.sub-title {
    font-size: 2.2vw; /* 原 2.8vw */
    color: #334d6e;
    margin: 1.5vh 0 0 4.5vw;
    font-weight: 600;
}