* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    background: #f4f7f8;
    color: #20313f;
    font-family: "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
    font-size: 16px;
    letter-spacing: 0;
    line-height: 1.7;
}

a {
    color: inherit;
    text-decoration: none;
}

.promo-container {
    width: min(1160px, calc(100% - 40px));
    margin: 0 auto;
}

.promo-topbar {
    position: sticky;
    z-index: 20;
    top: 0;
    border-bottom: 1px solid rgba(21, 58, 70, .12);
    background: rgba(255, 255, 255, .96);
    backdrop-filter: blur(12px);
}

.promo-topbar-inner {
    display: flex;
    min-height: 72px;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}

.promo-brand {
    display: flex;
    min-width: 220px;
    align-items: center;
    gap: 12px;
    font-weight: 700;
}

.promo-brand img {
    display: block;
    width: 152px;
    height: auto;
}

.promo-brand span {
    color: #24414d;
    font-size: 14px;
}

.promo-nav {
    display: flex;
    align-items: center;
    gap: 26px;
    color: #415763;
    font-size: 15px;
}

.promo-nav a:hover,
.promo-phone:hover {
    color: #c7322b;
}

.promo-phone {
    display: inline-flex;
    min-height: 38px;
    align-items: center;
    justify-content: center;
    padding: 0 16px;
    border: 1px solid #cbd8df;
    color: #153a46;
    font-weight: 700;
}

.promo-hero {
    overflow: hidden;
    background: #0a6f68;
    color: #fff;
}

.promo-hero-inner {
    display: grid;
    min-height: 560px;
    grid-template-columns: minmax(0, 1fr) 390px;
    gap: 42px;
    align-items: center;
    padding: 76px 0;
}

.promo-kicker,
.promo-section-label {
    display: inline-block;
    color: #f2b433;
    font-size: 14px;
    font-weight: 700;
}

.promo-hero h1 {
    max-width: 780px;
    margin: 14px 0 18px;
    font-size: 52px;
    font-weight: 800;
    line-height: 1.16;
}

.promo-hero p {
    max-width: 680px;
    margin: 0 0 28px;
    color: #e6f7f5;
    font-size: 19px;
}

.promo-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.promo-button {
    display: inline-flex;
    min-height: 44px;
    align-items: center;
    justify-content: center;
    padding: 0 24px;
    border: 1px solid rgba(255, 255, 255, .7);
    background: #fff;
    color: #153a46;
    font-weight: 700;
}

.promo-button.primary {
    border-color: #d83b35;
    background: #d83b35;
    color: #fff;
}

.promo-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 30px;
}

.promo-badges span {
    padding: 7px 12px;
    border: 1px solid rgba(255, 255, 255, .28);
    background: rgba(255, 255, 255, .12);
    color: #fff;
    font-size: 14px;
}

.promo-hero-board {
    border: 1px solid rgba(255, 255, 255, .22);
    background: #fff;
    color: #20313f;
    box-shadow: 0 20px 44px rgba(0, 0, 0, .18);
}

.promo-board-title {
    padding: 22px 24px;
    background: #f2b433;
    color: #153a46;
    font-size: 26px;
    font-weight: 800;
}

.promo-hero-board dl {
    margin: 0;
    padding: 8px 24px 22px;
}

.promo-hero-board dl div {
    padding: 18px 0;
    border-bottom: 1px solid #e4ecef;
}

.promo-hero-board dl div:last-child {
    border-bottom: 0;
}

.promo-hero-board dt {
    color: #6a7b84;
    font-size: 13px;
}

.promo-hero-board dd {
    margin: 5px 0 0;
    color: #18323d;
    font-size: 18px;
    font-weight: 700;
}

.promo-section {
    padding: 54px 0;
    background: #fff;
}

.promo-section.muted {
    background: #eef4f5;
}

.promo-grid,
.promo-columns {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 22px;
}

.promo-panel,
.promo-note,
.promo-step {
    border: 1px solid #dfe8ee;
    background: #fff;
    box-shadow: 0 10px 24px rgba(31, 55, 68, .06);
}

.promo-panel {
    padding: 30px;
}

.promo-panel.accent {
    border-top: 5px solid #2f6faa;
}

.promo-section h2,
.promo-contact h2 {
    margin: 8px 0 18px;
    color: #173944;
    font-size: 30px;
    line-height: 1.3;
}

.promo-check-list {
    margin: 0;
    padding: 0;
    list-style: none;
}

.promo-check-list li {
    position: relative;
    margin: 0 0 12px;
    padding-left: 24px;
    color: #435762;
}

.promo-check-list li::before {
    position: absolute;
    top: 0;
    left: 0;
    color: #0b8f86;
    content: "✓";
    font-weight: 800;
}

.promo-materials,
.promo-major-list {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.promo-materials span,
.promo-major-list span {
    padding: 8px 12px;
    border: 1px solid #cbd8df;
    background: #f7fafb;
    color: #294452;
    font-weight: 700;
}

.promo-panel p,
.promo-note p,
.promo-step p,
.promo-contact p {
    margin: 14px 0 0;
    color: #526974;
}

.promo-section-heading {
    max-width: 760px;
    margin-bottom: 24px;
}

.promo-step-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
}

.promo-step {
    min-height: 190px;
    padding: 24px;
}

.promo-step span {
    display: block;
    color: #d83b35;
    font-size: 28px;
    font-weight: 800;
    line-height: 1;
}

.promo-step h3 {
    margin: 18px 0 8px;
    color: #18323d;
    font-size: 20px;
}

.promo-columns article:first-child {
    padding: 24px 0;
}

.promo-note {
    padding: 30px;
    border-top: 5px solid #f2b433;
}

.promo-contact {
    padding: 58px 0;
    background: #173944;
    color: #fff;
}

.promo-contact-inner {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 430px;
    gap: 30px;
    align-items: center;
}

.promo-contact h2 {
    color: #fff;
}

.promo-contact p {
    color: #d8e8ec;
}

.promo-qr {
    margin: 0;
    padding: 14px;
    background: #fff;
}

.promo-qr img {
    display: block;
    width: 100%;
    max-height: 260px;
    object-fit: contain;
}

.promo-footer {
    padding: 22px 0;
    background: #0f2b34;
    color: #d8e8ec;
    font-size: 14px;
}

.promo-footer .promo-container {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    align-items: center;
    justify-content: center;
}

.promo-footer a:hover {
    color: #fff;
}

@media (max-width: 980px) {
    .promo-topbar-inner,
    .promo-hero-inner,
    .promo-contact-inner,
    .promo-grid,
    .promo-columns {
        grid-template-columns: 1fr;
    }

    .promo-topbar-inner {
        display: grid;
        padding: 12px 0;
    }

    .promo-nav {
        gap: 16px;
        overflow-x: auto;
        white-space: nowrap;
    }

    .promo-hero-inner {
        min-height: 0;
        padding: 54px 0;
    }

    .promo-hero h1 {
        font-size: 40px;
    }

    .promo-step-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 640px) {
    .promo-container {
        width: min(100% - 28px, 1160px);
    }

    .promo-brand {
        min-width: 0;
    }

    .promo-brand img {
        width: 132px;
    }

    .promo-phone,
    .promo-button {
        width: 100%;
    }

    .promo-hero h1 {
        font-size: 32px;
    }

    .promo-hero p {
        font-size: 16px;
    }

    .promo-section {
        padding: 38px 0;
    }

    .promo-section h2,
    .promo-contact h2 {
        font-size: 24px;
    }

    .promo-panel,
    .promo-note,
    .promo-step {
        padding: 22px;
    }

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