:root {
    --primary: #0a5b9f;
    --primary-dark: #073f6d;
    --accent: #f4b400;
    --bg: #f5f7fb;
    --text: #1f2a37;
    --muted: #5f6b7a;
    --card-bg: #ffffff;
    --border: #e2e8f0;
    --shadow: 0 15px 35px rgba(15, 23, 42, 0.08);
}

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

body {
    margin: 0;
    font-family: "Microsoft YaHei", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.7;
    min-height: 100vh;
}

main {
    display: block;
}

.announcement-page {
    max-width: 960px;
    margin: 0 auto;
    padding: 24px 20px 48px;
}

.announcement-detail {
    max-width: 720px;
}

.article-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--card-bg);
    padding: 18px 22px;
    border-radius: 999px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    gap: 16px;
}

.media-badge {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    color: var(--muted);
}

.badge-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    display: inline-block;
}

.badge-name {
    font-weight: 600;
    color: var(--primary-dark);
}

.badge-divider {
    width: 1px;
    height: 14px;
    background: var(--border);
}

.follow-btn {
    border: none;
    background: var(--primary);
    color: #fff;
    padding: 8px 18px;
    border-radius: 999px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s ease;
}

.follow-btn:hover,
.follow-btn:focus-visible {
    background: var(--primary-dark);
}

.article-hero {
    margin-top: 28px;
    background: var(--card-bg);
    padding: 32px;
    border-radius: 28px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
}

.article-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    padding: 4px 14px;
    background: rgba(10, 91, 159, 0.08);
    color: var(--primary-dark);
    border-radius: 999px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin-bottom: 16px;
}

.article-hero h1 {
    margin: 0 0 16px;
    font-size: 30px;
    color: var(--text);
}

.article-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 12px 16px;
    font-size: 14px;
    color: var(--muted);
}

.article-cover {
    margin: 24px 0 0;
    border-radius: 24px;
    overflow: hidden;
    border: 1px solid var(--border);
}

.cover-visual {
    width: 100%;
    height: 220px;
    background: linear-gradient(135deg, rgba(10, 91, 159, 0.8), rgba(7, 63, 109, 0.95)), url("../images/road-texture.png");
    background-size: cover;
    background-position: center;
    filter: saturate(1.2);
}

.article-content {
    margin-top: 32px;
    background: var(--card-bg);
    padding: 32px;
    border-radius: 24px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
}

.lead {
    font-size: 18px;
    color: var(--text);
    margin-top: 0;
    margin-bottom: 20px;
    text-indent: 2em;
}

.content-block + .content-block {
    margin-top: 28px;
}

.content-block h2 {
    font-size: 22px;
    margin: 0 0 14px;
    color: var(--primary-dark);
    position: relative;
    padding-left: 16px;
}

.content-block h2::before {
    content: "";
    position: absolute;
    left: 0;
    top: 8px;
    width: 6px;
    height: 18px;
    border-radius: 999px;
    background: linear-gradient(180deg, var(--accent), var(--primary));
}

.content-block p {
    margin: 0 0 12px;
    color: var(--muted);
}

.announcement-list {
    background: var(--card-bg);
    border-radius: 18px;
    padding: 36px 28px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.announcement-list h1 {
    margin: 0;
    font-size: 24px;
    color: var(--primary-dark);
}

.announcement-link {
    font-size: 20px;
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
    line-height: 1.6;
}

.announcement-link:hover,
.announcement-link:focus-visible {
    color: var(--primary-dark);
    text-decoration: underline;
}

.hero {
    background: radial-gradient(circle at top, rgba(10, 91, 159, 0.85), rgba(7, 63, 109, 0.95));
    color: #fff;
    padding: 36px 28px;
    border-radius: 18px;
    box-shadow: var(--shadow);
    text-align: left;
}

.hero-tag {
    display: inline-block;
    padding: 6px 14px;
    background: rgba(244, 180, 0, 0.2);
    color: #fff8e1;
    border-radius: 999px;
    font-size: 14px;
    margin-bottom: 12px;
    letter-spacing: 0.08em;
}

.hero h1 {
    font-size: 26px;
    margin: 0 0 12px;
}

.hero-intro {
    margin: 0 0 16px;
    color: rgba(255, 255, 255, 0.9);
}

.hero-meta {
    display: flex;
    flex-direction: column;
    gap: 4px;
    font-weight: 500;
}

.section {
    margin-top: 32px;
    background: var(--card-bg);
    padding: 24px 20px;
    border-radius: 16px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
}

.section h2 {
    margin: 0 0 16px;
    font-size: 22px;
    color: var(--primary-dark);
    position: relative;
    padding-left: 14px;
}

.section h2::before {
    content: "";
    position: absolute;
    left: 0;
    top: 6px;
    width: 4px;
    height: 18px;
    border-radius: 2px;
    background: linear-gradient(180deg, var(--accent), var(--primary));
}

.section p {
    margin: 0 0 12px;
    color: var(--muted);
}

.info-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.info-list strong {
    color: var(--primary-dark);
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
}

.contact-card {
    background: #f9fbff;
    border-radius: 16px;
    border: 1px solid rgba(10, 91, 159, 0.15);
    padding: 18px;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.7);
}

.contact-card .label {
    margin: 0;
    font-size: 13px;
    color: var(--muted);
}

.contact-card .value {
    margin: 4px 0 0;
    font-size: 16px;
    color: var(--text);
    font-weight: 600;
}

.subsection {
    padding: 18px 16px;
    border-radius: 14px;
    border: 1px solid var(--border);
    margin-bottom: 16px;
    background: #fbfcff;
    position: relative;
}

.subsection::before {
    content: "";
    position: absolute;
    left: 0;
    top: 18px;
    bottom: 18px;
    width: 4px;
    border-radius: 0 2px 2px 0;
    background: linear-gradient(180deg, var(--primary), var(--accent));
}

.subsection h3 {
    margin: 0 0 10px 8px;
    font-size: 18px;
    color: var(--primary);
}

.subsection p {
    margin-left: 8px;
    color: var(--muted);
}

.primary-list {
    margin: 0 0 0 16px;
    padding-left: 12px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    color: var(--muted);
    counter-reset: primary;
}

.primary-list li {
    position: relative;
    padding-left: 32px;
    list-style: none;
}

.primary-list li::before {
    counter-increment: primary;
    content: counter(primary) ".";
    position: absolute;
    left: 0;
    top: 0;
    font-weight: 600;
    color: var(--primary);
}

.feedback-panel {
    margin-top: 28px;
    display: flex;
    flex-wrap: wrap;
    gap: 18px;
    align-items: center;
    justify-content: space-between;
    background: linear-gradient(135deg, rgba(10, 91, 159, 0.08), rgba(7, 63, 109, 0.08));
    border: 1px solid rgba(10, 91, 159, 0.2);
    border-radius: 20px;
    padding: 22px 24px;
}

.panel-info h4 {
    margin: 0 0 6px;
    font-size: 18px;
    color: var(--primary-dark);
}

.panel-info p {
    margin: 0;
    color: var(--muted);
}

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

.panel-link {
    padding: 10px 18px;
    border-radius: 999px;
    border: 1px solid var(--primary);
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
    transition: all 0.2s ease;
}

.panel-link:hover,
.panel-link:focus-visible {
    background: var(--primary);
    color: #fff;
}

.footer {
    text-align: center;
    margin-top: 36px;
    color: var(--muted);
    font-weight: 600;
    letter-spacing: 0.05em;
}

/* Desktop / large view */
@media screen and (min-width: 500px) {
    body {
        background: linear-gradient(135deg, #eff4ff, #f3f8ff 60%, #e9f3ff);
    }

    .announcement-page {
        padding: 48px 32px 64px;
    }

    .article-header {
        border-radius: 28px;
        padding: 22px 32px;
    }

    .article-hero {
        padding: 40px;
    }

    .article-hero h1 {
        font-size: 34px;
    }

    .article-content {
        padding: 40px;
    }

    .hero {
        padding: 48px 54px;
    }

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

    .hero-meta {
        flex-direction: row;
        justify-content: space-between;
        gap: 16px;
    }

    .section {
        padding: 32px 36px;
    }

    .subsection {
        display: grid;
        grid-template-columns: 220px 1fr;
        column-gap: 24px;
        align-items: start;
    }

    .subsection h3 {
        margin: 0;
    }

    .subsection p,
    .subsection ol {
        margin: 0;
    }
}

/* Mobile / small view */
@media screen and (max-width: 499px) {
    .announcement-page {
        padding: 16px 12px 32px;
    }

    .article-header {
        flex-direction: column;
        align-items: flex-start;
        border-radius: 18px;
        padding: 16px;
    }

    .article-hero,
    .article-content {
        padding: 24px 18px;
    }

    .article-hero h1 {
        font-size: 24px;
    }

    .article-meta {
        flex-direction: column;
    }

    .article-cover {
        border-radius: 18px;
    }

    .feedback-panel {
        flex-direction: column;
        align-items: flex-start;
    }

    .panel-actions {
        width: 100%;
        flex-direction: column;
    }

    .hero {
        padding: 28px 22px;
    }

    .hero h1 {
        font-size: 22px;
    }

    .section {
        padding: 20px 16px;
    }

    .subsection {
        padding: 16px 12px 14px 16px;
    }

    .contact-grid {
        grid-template-columns: 1fr;
    }

    .hero-meta {
        gap: 6px;
        font-size: 14px;
    }
}