/* 7628 世界时间 - 轻量样式（无外部依赖） */
:root {
    --bg: #f0fdf4;
    --card: #ffffff;
    --line: #dcfce7;
    --line-strong: #bbf7d0;
    --green-900: #14532d;
    --green-800: #166534;
    --green-700: #15803d;
    --green-600: #16a34a;
    --green-500: #22c55e;
    --muted: #4b7a5a;
    --muted-2: #6b8f7b;
    --shadow: 0 10px 30px rgba(22, 101, 52, .08);
    --radius: 20px;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
    margin: 0;
    background: var(--bg);
    color: var(--green-900);
    font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    line-height: 1.7;
    font-size: 15px;
}

a { color: var(--green-700); text-decoration: none; }
a:hover { color: var(--green-900); }

.wrap { width: 100%; max-width: 960px; margin: 0 auto; padding: 0 16px; }

/* 顶栏 */
.topbar {
    background: rgba(255, 255, 255, .92);
    border-bottom: 1px solid var(--line);
    position: sticky;
    top: 0;
    z-index: 20;
    backdrop-filter: blur(8px);
}
.topbar-inner { display: flex; align-items: center; gap: 18px; min-height: 58px; }
.brand { font-weight: 800; font-size: 19px; color: var(--green-800); letter-spacing: .5px; }
.brand span { color: var(--green-500); font-weight: 600; margin-left: 2px; }
.nav { display: flex; gap: 16px; flex: 1; font-size: 14px; }
.nav a { color: var(--muted); }
.nav a:hover { color: var(--green-700); }
.lang-switch {
    border: 1px solid var(--line-strong);
    background: #fff;
    color: var(--green-700);
    border-radius: 999px;
    padding: 4px 12px;
    font-size: 13px;
    white-space: nowrap;
}

/* 面包屑 */
.crumb { margin: 18px 0 4px; font-size: 13px; color: var(--muted-2); }
.crumb ol { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 6px; }
.crumb li:not(:last-child)::after { content: "/"; margin-left: 6px; color: #b7d8c4; }
.crumb a { color: var(--green-700); }

/* 页头 */
.page-head { text-align: center; padding: 10px 0 22px; }
.page-head h1 { margin: 6px 0 6px; font-size: 30px; line-height: 1.3; color: var(--green-900); }
.page-head .sub { margin: 0; color: var(--muted); font-size: 14px; }

/* 时钟卡片 */
.clock-card {
    background: linear-gradient(160deg, #ffffff 0%, #f7fef9 100%);
    border: 1px solid var(--line-strong);
    border-radius: 24px;
    box-shadow: var(--shadow);
    padding: 26px 20px 20px;
    text-align: center;
    position: relative;
    overflow: hidden;
}
.clock-card::before {
    content: "";
    position: absolute;
    inset: 0 0 auto 0;
    height: 4px;
    background: linear-gradient(90deg, #86efac, #22c55e);
}
.clock-place { font-size: 15px; color: var(--green-700); font-weight: 600; }
.clock-date { margin-top: 4px; color: var(--muted); font-size: 14px; }
.clock-time {
    margin: 8px 0 4px;
    font-size: clamp(46px, 12vw, 78px);
    font-weight: 800;
    letter-spacing: 2px;
    color: var(--green-900);
    font-variant-numeric: tabular-nums;
    font-feature-settings: "tnum";
    line-height: 1.15;
}
.clock-time i { font-style: normal; color: var(--green-500); font-weight: 400; margin: 0 2px; }
.clock-time .sec { color: var(--green-700); }
.clock-meta { color: var(--muted); font-size: 13px; }
.clock-sync {
    margin-top: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-size: 12px;
    color: var(--muted-2);
    flex-wrap: wrap;
}
.dot { width: 7px; height: 7px; border-radius: 50%; background: var(--green-500); box-shadow: 0 0 0 3px rgba(34, 197, 94, .15); }
.sync-btn {
    border: 1px solid var(--line-strong);
    background: #fff;
    color: var(--green-700);
    border-radius: 999px;
    padding: 3px 10px;
    font-size: 12px;
    cursor: pointer;
}
.sync-btn:hover { background: #f0fdf4; }

/* 内容面板 */
.page { padding-bottom: 30px; }
.panel {
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 20px;
    margin-top: 16px;
    box-shadow: 0 4px 14px rgba(22, 101, 52, .04);
}
.panel h2 {
    margin: 0 0 12px;
    font-size: 19px;
    color: var(--green-800);
    padding-left: 10px;
    border-left: 4px solid var(--green-400, #4ade80);
    line-height: 1.4;
}
.panel p { margin: 0 0 10px; }
.panel p:last-child { margin-bottom: 0; }
.intro-panel p { color: #2f5e42; }
.diff-line { font-weight: 600; color: var(--green-700); }
.muted { color: var(--muted); font-size: 13.5px; }
.note { color: var(--muted-2); font-size: 12.5px; margin-top: 10px; }
.inline-link { margin-top: 12px; font-size: 14px; }

/* 24 小时对照表 */
.table-wrap { margin-top: 8px; border: 1px solid var(--line); border-radius: 14px; overflow-x: auto; -webkit-overflow-scrolling: touch; }
.hour-table { width: 100%; border-collapse: collapse; font-variant-numeric: tabular-nums; }
.hour-table th, .hour-table td { padding: 8px 12px; text-align: left; font-size: 14px; }
.hour-table thead th { background: #ecfdf3; color: var(--green-800); font-weight: 600; }
.hour-table tbody tr:nth-child(even) { background: #f8fffa; }
.hour-table tbody td { border-top: 1px solid #f0fdf4; color: #2f5e42; }
.hour-table td:first-child { color: var(--muted); }
.hour-table em { font-style: normal; color: var(--green-600); font-size: 12px; }

/* FAQ */
.faq-item { border: 1px solid var(--line); border-radius: 12px; padding: 0; margin-bottom: 8px; background: #fff; }
.faq-item summary {
    cursor: pointer;
    padding: 12px 14px;
    font-weight: 600;
    color: var(--green-800);
    list-style: none;
    position: relative;
    padding-right: 34px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
    content: "+";
    position: absolute;
    right: 14px;
    top: 10px;
    color: var(--green-500);
    font-size: 18px;
    line-height: 1;
}
.faq-item[open] summary::after { content: "−"; }
.faq-answer { padding: 0 14px 12px; color: #3b6b4f; font-size: 14px; }
.faq-answer p { margin: 0; }

/* 链接栅格 */
.link-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 10px; }
.link-chip {
    display: flex;
    flex-direction: column;
    gap: 2px;
    padding: 10px 12px;
    border: 1px solid var(--line);
    border-radius: 12px;
    background: #fbfefc;
    transition: all .15s ease;
}
.link-chip:hover { border-color: var(--line-strong); background: #f0fdf4; transform: translateY(-1px); }
.link-chip span { font-size: 14px; color: var(--green-800); font-weight: 600; }
.link-chip em { font-style: normal; font-size: 12px; color: var(--muted-2); }

/* 区域导航 */
.region-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 16px;
    justify-content: center;
    position: sticky;
    top: 58px;
    z-index: 19;
    padding: 10px 0;
    background: rgba(240, 253, 244, .92);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
}
.region-nav a {
    padding: 5px 14px;
    border-radius: 999px;
    border: 1px solid var(--line-strong);
    background: #fff;
    font-size: 13px;
    color: var(--green-700);
}
.region-nav a:hover { background: #ecfdf3; }

/* 吸附后锚点定位留出顶栏+浮动导航的高度，避免标题被遮挡 */
:root { scroll-behavior: smooth; }
main.page > section[id] { scroll-margin-top: 118px; }

/* 城市卡片（总览） */
.city-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(132px, 1fr)); gap: 10px; }
.city-card {
    display: flex;
    flex-direction: column;
    gap: 2px;
    border: 1px solid var(--line);
    border-radius: 14px;
    padding: 10px 12px;
    background: #fbfefc;
    transition: all .15s ease;
}
.city-card:hover { border-color: var(--line-strong); background: #f0fdf4; transform: translateY(-1px); }
.city-name { font-size: 13px; color: var(--green-700); }
.city-time {
    font-size: 20px;
    font-weight: 800;
    color: var(--green-900);
    font-variant-numeric: tabular-nums;
    letter-spacing: .5px;
    line-height: 1.2;
}
.city-diff { font-size: 11.5px; color: var(--muted-2); }

.back-hub { text-align: center; margin: 22px 0 0; font-size: 14px; }

.noscript-tip { color: #b45309; font-size: 12px; margin: 8px 0 0; }

/* 页脚 */
.site-foot { border-top: 1px solid var(--line); background: #fff; margin-top: 10px; padding: 20px 0 28px; }
.foot-links { display: flex; flex-wrap: wrap; gap: 14px; justify-content: center; font-size: 13px; margin: 0 0 8px; }
.foot-links a { color: var(--muted); }
.foot-note { text-align: center; color: #9ab8a7; font-size: 12px; margin: 0; }

/* 时/分/秒三格 */
.clock-tiles {
    margin-top: 14px;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    max-width: 520px;
    margin-left: auto;
    margin-right: auto;
}
.clock-tile {
    border: 1px solid var(--line);
    border-radius: 14px;
    background: #fbfefc;
    padding: 8px 6px 7px;
}
.clock-tile b {
    display: block;
    font-size: 24px;
    line-height: 1.15;
    color: var(--green-800);
    font-variant-numeric: tabular-nums;
    font-feature-settings: "tnum";
}
.clock-tile span { font-size: 12px; color: var(--muted-2); }
.sync-btn.is-copied {
    border-color: var(--green-500);
    background: #ecfdf3;
    color: var(--green-800);
}

/* 时间换算器 */
.converter .conv-hint { color: var(--muted); font-size: 13.5px; margin: 0 0 14px; }
.conv-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 12px;
}
.conv-tab {
    border: 1px solid var(--line-strong);
    background: #fff;
    color: var(--green-700);
    border-radius: 999px;
    padding: 5px 14px;
    font-size: 13px;
    cursor: pointer;
    transition: all .15s ease;
}
.conv-tab:hover { background: #f0fdf4; }
.conv-tab.is-active {
    background: var(--green-600);
    border-color: var(--green-600);
    color: #fff;
}
.conv-form {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-end;
    gap: 12px;
}
.conv-field {
    display: flex;
    flex-direction: column;
    gap: 4px;
    font-size: 13px;
    color: var(--muted);
    flex: 1 1 220px;
    min-width: 180px;
}
.conv-field input {
    width: 100%;
    padding: 9px 12px;
    border: 1px solid var(--line-strong);
    border-radius: 12px;
    background: #fbfefc;
    color: var(--green-900);
    font-size: 15px;
    font-variant-numeric: tabular-nums;
    font-family: inherit;
}
.conv-field input:focus {
    outline: none;
    border-color: var(--green-500);
    box-shadow: 0 0 0 3px rgba(34, 197, 94, .15);
}
.conv-btns { display: flex; flex-wrap: wrap; gap: 8px; }
.btn-primary,
.btn-ghost {
    border-radius: 999px;
    padding: 9px 18px;
    font-size: 14px;
    font-family: inherit;
    cursor: pointer;
    border: 1px solid transparent;
    transition: all .15s ease;
}
.btn-primary {
    background: var(--green-600);
    border-color: var(--green-600);
    color: #fff;
    font-weight: 600;
}
.btn-primary:hover { background: var(--green-700); }
.btn-ghost {
    background: #fff;
    border-color: var(--line-strong);
    color: var(--green-700);
}
.btn-ghost:hover { background: #f0fdf4; }
.btn-ghost.is-copied {
    border-color: var(--green-500);
    background: #ecfdf3;
    color: var(--green-800);
}
.conv-result {
    margin-top: 14px;
    border: 1px solid var(--line-strong);
    border-radius: 16px;
    background: linear-gradient(160deg, #f7fef9 0%, #ffffff 100%);
    padding: 14px 16px;
}
.conv-out-main {
    margin: 0;
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 8px;
}
.conv-out-tag {
    font-size: 12px;
    color: var(--green-700);
    border: 1px solid var(--line-strong);
    background: #fff;
    border-radius: 999px;
    padding: 2px 10px;
}
.conv-out-main b {
    font-size: clamp(20px, 5vw, 26px);
    color: var(--green-900);
    font-variant-numeric: tabular-nums;
    font-feature-settings: "tnum";
    letter-spacing: .5px;
}
.conv-out-note {
    margin: 6px 0 0;
    font-size: 12.5px;
    color: var(--muted);
}

/* 使用说明与免责声明 */
.steps { margin: 0; padding-left: 20px; color: #2f5e42; }
.steps li { margin-bottom: 6px; }
.steps li:last-child { margin-bottom: 0; }
.disclaimer { color: var(--muted); font-size: 13px; margin: 0; }
@media (max-width: 640px) {
    body { font-size: 14px; }
    .topbar-inner { flex-wrap: wrap; justify-content: space-between; padding: 8px 0; gap: 8px 12px; }
    .brand { font-size: 17px; }
    .lang-switch { order: 2; }
    .nav { order: 3; flex: 1 0 100%; overflow-x: auto; white-space: nowrap; gap: 14px; font-size: 13px; padding-bottom: 2px; scrollbar-width: none; }
    .nav::-webkit-scrollbar { display: none; }
    .page-head h1 { font-size: 24px; }
    .clock-time { font-size: clamp(40px, 15vw, 62px); }
    .panel { padding: 16px; }
    .hour-table th, .hour-table td { padding: 7px 9px; font-size: 13px; }
    .city-grid { grid-template-columns: repeat(auto-fill, minmax(110px, 1fr)); }
    .clock-tiles { gap: 8px; }
    .clock-tile b { font-size: 20px; }
    .conv-form { flex-direction: column; align-items: stretch; }
    .conv-btns { justify-content: stretch; }
    .conv-btns .btn-primary, .conv-btns .btn-ghost { flex: 1 1 auto; padding: 8px 12px; font-size: 13px; }
}