:root {
    --bg-color: #eeeeee;
    --nav-height: 50px;
    --card-bg: #ffffff;
    --border-color: rgba(143, 179, 154, 0.18);
    --title-color: #1d2731;
    --text-color: #334455;
    --muted-color: #6a7c8d;
    --accent: #98e0ac;
    /* 卡片内边距唯一来源：.policy-card 与公告页通栏细线共用，避免两处漂移 */
    --policy-card-pad-y: clamp(16px, 4vw, 24px);
    --policy-card-pad-x: clamp(16px, 4vw, 24px);
}

* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    padding: 0;
    height: 100%;
    background: #1a1a1a;
    font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
    color: var(--text-color);
    overflow: hidden;
}

.policy-wrapper {
    height: 100vh;
    height: 100dvh;
    max-width: 650px;
    margin: 0 auto;
    background: var(--bg-color);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    padding-bottom: env(safe-area-inset-bottom);
}

.policy-navbar {
    height: var(--nav-height);
    background: rgba(255, 255, 255, 0.95);
    display: flex;
    justify-content: center;
    align-items: center;
    border-bottom: 1px solid rgba(0, 0, 0, 0.04);
    flex: 0 0 auto;
}

.policy-navbar h1 {
    margin: 0;
    font-size: 1.5em;
    color: #1f1f1f;
    text-shadow: 0 0 6px rgba(0, 0, 0, 0.1);
}

.home-link {
    color: inherit;
    text-decoration: none;
}

.home-link:hover,
.home-link:focus-visible {
    color: #1f1f1f;
    text-decoration: none;
}

.policy-content {
    flex: 1 1 auto;
    min-height: 0;
    overflow-y: auto;
    padding: clamp(12px, 3vw, 20px);
    -webkit-overflow-scrolling: touch;
}

.policy-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
    padding: var(--policy-card-pad-y) var(--policy-card-pad-x);
}

.policy-head {
    margin-bottom: 10px;
    padding-bottom: 12px;
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
}

.policy-head h2 {
    margin: 0;
    font-size: 1.35em;
    color: var(--title-color);
}

.policy-meta {
    margin: 8px 0 0;
    color: var(--muted-color);
    font-size: 12px;
}

.policy-section {
    margin-top: 14px;
}

.policy-section h3 {
    margin: 0 0 6px;
    font-size: 1.02em;
    color: var(--title-color);
}

.policy-section p {
    margin: 0;
    font-size: 14px;
    line-height: 1.68;
    color: var(--text-color);
}

/* =========================
   站点公告（/announcements/）
   只作用于 .announcement-page / .announcement-*，不影响隐私与条款页。
   ========================= */
.announcement-page {
    padding-top: env(safe-area-inset-top);
    padding-left: env(safe-area-inset-left);
    padding-right: env(safe-area-inset-right);
}

/* 200% 文字下共享 navbar 的固定高度会裁 h1；只在新页允许它长高。 */
.announcement-page .policy-navbar {
    height: auto;
    min-height: var(--nav-height);
}

@media only screen and (max-width: 640px) {
    .announcement-page .policy-navbar {
        min-height: 44px;
    }
}

.announcement-page .policy-content {
    /* 内部滚动容器：允许竖向滚动，保留双指缩放 */
    touch-action: pan-y pinch-zoom;
}

.announcement-section {
    margin-top: 18px;
}

.announcement-section h3 {
    margin: 0 0 8px;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.02em;
    color: var(--muted-color);
}

/* 历史公告：通栏细线 + 章节标签，把「当前/历史」分成两段。
   负外边距 = 卡片内边距（同一个变量）；宽度必须保持 auto，写 100% 会让右缘缩进。 */
.announcement-section.announcement-section--history {
    margin: 20px calc(-1 * var(--policy-card-pad-x)) 0;
    padding: 16px var(--policy-card-pad-x) 0;
    border-top: 1px solid rgba(0, 0, 0, 0.08);
}

.announcement-item {
    padding: 12px 0;
    border-top: 1px solid rgba(0, 0, 0, 0.06);
}

.announcement-item:first-of-type {
    border-top: 0;
    padding-top: 4px;
}

.announcement-head {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 4px 8px;
}

.announcement-level {
    flex: 0 0 auto;
    display: inline-block;
    padding: 1px 6px;
    border-radius: 999px;
    font-size: 11px;
    line-height: 1.5;
    font-weight: 600;
}

.announcement-level--info {
    color: #2f6b42;
    background: #eaf7ee;
}

.announcement-level--warning {
    color: #7a4b00;
    background: #fff4d6;
}

.announcement-level--critical {
    color: #8a2630;
    background: #fde8e8;
}

.announcement-title {
    flex: 1 1 auto;
    min-width: 0;
    margin: 0;
    font-size: 1.02em;
    line-height: 1.4;
    color: var(--title-color);
    overflow-wrap: anywhere;
    word-break: break-word;
}

.announcement-date {
    flex: 0 0 auto;
    color: var(--muted-color);
    font-size: 12px;
    white-space: nowrap;
}

/* 历史公告的「开始 – 结束」：允许在分隔符处折行，防止 320px/200% 时横向溢出。 */
.announcement-date.announcement-date--range {
    white-space: normal;
    max-width: 100%;
}

.announcement-date time {
    white-space: nowrap;
}

.announcement-body p {
    margin: 8px 0 0;
    font-size: 14px;
    line-height: 1.68;
    color: var(--text-color);
    overflow-wrap: anywhere;
    word-break: break-word;
}

.announcement-body p:first-child {
    margin-top: 6px;
}

.announcement-link {
    margin: 8px 0 0;
    font-size: 13px;
    overflow-wrap: anywhere;
    word-break: break-word;
}

.announcement-link a {
    color: var(--title-color);
    text-decoration: underline;
    text-underline-offset: 2px;
}

@media (hover: hover) {
    .announcement-link a:hover {
        color: #1f1f1f;
    }
}

.announcement-link a:focus-visible {
    outline: 2px solid var(--title-color);
    outline-offset: 2px;
}

.announcement-empty {
    margin: 4px 0 0;
    color: var(--muted-color);
    font-size: 13px;
    line-height: 1.6;
}

@media only screen and (max-width: 640px) {
    .announcement-date {
        font-size: 11px;
    }
}

@media only screen and (max-width: 420px) {
    .announcement-head {
        gap: 3px 6px;
    }

    .announcement-title {
        font-size: 1em;
    }
}

@media only screen and (max-width: 360px) {
    .announcement-level {
        font-size: 10px;
    }
}

/* =========================
   Responsive
   ========================= */
@media only screen and (max-width: 640px) {
    :root {
        --policy-card-pad-y: clamp(14px, 3vw, 20px);
        --policy-card-pad-x: clamp(14px, 3vw, 20px);
    }

    .policy-navbar {
        height: 44px;
    }

    .policy-navbar h1 {
        font-size: 1.3em;
    }

    .policy-content {
        padding: 12px;
    }

    .policy-card {
        border-radius: 14px;
    }

    .policy-head h2 {
        font-size: 1.25em;
    }

    .policy-section h3 {
        font-size: 0.98em;
    }

    .policy-meta {
        font-size: 11px;
    }
}

@media only screen and (max-width: 420px) {
    :root {
        --policy-card-pad-y: 14px;
        --policy-card-pad-x: 12px;
    }

    .policy-content {
        padding: 10px;
    }

    .policy-card {
        border-radius: 12px;
    }

    .policy-head h2 {
        font-size: 1.18em;
    }

    .policy-section {
        margin-top: 12px;
    }
}

@media only screen and (max-width: 360px) {
    :root {
        --policy-card-pad-y: 12px;
        --policy-card-pad-x: 10px;
    }

    .policy-content {
        padding: 8px;
    }

    .policy-card {
        border-radius: 10px;
    }
}