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

@page {
    size: 1080px 1920px;
    margin: 0;
}

@media print {
    html,
    body {
        width: 1080px;
        height: 1920px;
        background: #07152a;
        print-color-adjust: exact;
        -webkit-print-color-adjust: exact;
    }

    .stage {
        top: 0;
        left: 0;
        transform: none;
    }
}

html,
body {
    width: 100%;
    height: 100%;
    overflow: hidden;
    background: transparent;
    color: #fff;
    font-family: "Microsoft YaHei", "PingFang SC", "Source Han Sans SC", "Noto Sans SC", sans-serif;
    -webkit-font-smoothing: antialiased;
}

.stage {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 1080px;
    height: 1920px;
    overflow: hidden;
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
    transform: translate(-50%, -50%);
    transform-origin: center center;
}

.export-mode,
.export-mode body {
    width: 1080px;
    height: 1920px;
}

.export-mode .stage {
    top: 0;
    left: 0;
    transform: none;
}

.mechanical-wrap {
    position: absolute;
    inset: 0;
    z-index: 2;
}

.mechanical-title {
    font-size: 84px;
    font-weight: 800;
    letter-spacing: 2px;
    line-height: 1.28;
}

.center {
    text-align: center;
}

.orange {
    color: #f58220;
}

.cover-title {
    position: absolute;
    top: 200px;
    right: 80px;
    left: 80px;
    font-size: 88px;
}

.cover-subtitle {
    position: absolute;
    top: 440px;
    left: 80px;
    font-size: 50px;
    line-height: 1.4;
}

.accent-rule {
    position: absolute;
    top: 550px;
    left: 80px;
    width: 70px;
    height: 6px;
    border-radius: 3px;
    background: #f58220;
}

.cover-intro {
    position: absolute;
    top: 640px;
    left: 80px;
    color: #bec8d7;
    font-size: 40px;
}

.problem-list {
    position: absolute;
    top: 780px;
    right: 80px;
    left: 80px;
    display: flex;
    flex-direction: column;
    gap: 26px;
}

.mechanical-card {
    border: 1px solid rgba(130, 170, 230, .22);
    border-radius: 16px;
    background: linear-gradient(180deg, rgba(45, 85, 165, .38), rgba(22, 50, 110, .42));
}

.problem-card {
    display: flex;
    width: 70%;
    min-height: 118px;
    align-items: center;
    justify-content: space-between;
    padding: 26px 40px;
}

.problem-title {
    font-size: 38px;
    font-weight: 700;
}

.problem-number {
    color: rgba(150, 170, 200, .5);
    font-size: 28px;
    font-weight: 700;
}

.cover-footer {
    position: absolute;
    right: 80px;
    bottom: 200px;
    left: 80px;
}

.cover-banner {
    padding: 22px 30px;
    border: 1px solid rgba(120, 160, 220, .2);
    border-radius: 12px;
    background: rgba(10, 25, 60, .75);
    color: #e8eefc;
    font-size: 36px;
    text-align: center;
}

.cover-note {
    margin-top: 22px;
    color: #7e90b4;
    font-size: 28px;
}

.content-offset {
    position: absolute;
    top: 200px;
    right: 80px;
    left: 80px;
}

.tips-title {
    font-size: 60px;
}

.card-stack {
    display: flex;
    flex-direction: column;
    gap: 30px;
    margin-top: 70px;
}

.tip-card {
    padding: 40px 44px;
}

.card-title {
    display: flex;
    gap: 15px;
    font-size: 40px;
    font-weight: 700;
}

.card-description {
    margin-top: 24px;
    color: #bec8d7;
    font-size: 25px;
    line-height: 1.7;
}

.vendor-offset {
    position: absolute;
    top: 220px;
    right: 80px;
    left: 80px;
}

.vendor-title {
    font-size: 80px;
}

.vendor-stack {
    margin-top: 80px;
}

.vendor-card {
    padding: 34px 44px;
}

.vendor-heading {
    display: flex;
    align-items: center;
    gap: 18px;
}

.vendor-name {
    font-size: 54px;
    font-weight: 700;
}

.vendor-tag {
    padding: 5px 14px;
    border-radius: 6px;
    background: #f58220;
    color: #fff;
    font-size: 24px;
    font-weight: 700;
}

.vendor-description {
    margin-top: 18px;
    color: #a9bad8;
    font-size: 34px;
    line-height: 1.7;
}

.summary-offset {
    position: absolute;
    top: 180px;
    right: 80px;
    bottom: 260px;
    left: 80px;
}

.summary-title {
    font-size: 68px;
    line-height: 1.38;
}

.step-stack {
    display: flex;
    flex-direction: column;
    gap: 66px;
    margin-top: 82px;
}

.summary-step {
    position: relative;
    display: flex;
    gap: 22px;
    align-items: flex-start;
}

.step-number {
    position: absolute;
    top: -36px;
    left: -18px;
    display: grid;
    width: 70px;
    height: 70px;
    place-items: center;
    border-radius: 12px;
    background: #f58220;
    color: #fff;
    font-size: 42px;
    font-weight: 800;
}

.step-card {
    width: 100%;
    padding: 30px 42px;
}

.step-title {
    font-size: 42px;
    font-weight: 700;
}

.step-description {
    margin-top: 12px;
    color: #a9bad8;
    font-size: 32px;
    line-height: 1.6;
}

.summary-footer {
    position: absolute;
    right: 80px;
    bottom: 200px;
    left: 80px;
    padding: 22px 30px;
    border-radius: 50px;
    background: #f58220;
    color: #fff;
    font-size: 30px;
    font-weight: 700;
    text-align: center;
}

.dots {
    position: absolute;
    right: 0;
    bottom: 60px;
    left: 0;
    z-index: 2;
    display: flex;
    justify-content: center;
    gap: 16px;
}

.dots a {
    display: block;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: rgba(150, 170, 200, .35);
    transition: background .18s ease, transform .18s ease;
}

.dots a:hover {
    background: rgba(245, 130, 32, .68);
    transform: scale(1.16);
}

.dots a.on {
    background: #f58220;
}

.mechanical-wrap ul,
.mechanical-wrap ol {
    margin: .25em 0;
    padding-left: 1.2em;
}

.mechanical-wrap mark {
    border-radius: .08em;
    background: #ffd166;
    color: #101a2b;
}