/* ==================================================================
 * Fireki Changelog Styles
 * ================================================================== */

:root {
    --cl-primary:      #7c5cff;
    --cl-primary-soft: #946ce6;
    --cl-primary-dark: #5b3fd6;
    --cl-bg:           #f7f8fc;
    --cl-card:         #ffffff;
    --cl-text:         #1a1d29;
    --cl-text-soft:    #5a5f6e;
    --cl-text-mute:    #9aa0ae;
    --cl-border:       rgba(20, 20, 40, .07);
    --cl-shadow-sm:    0 2px 8px rgba(20, 20, 60, .05);
    --cl-shadow-md:    0 8px 28px rgba(20, 20, 60, .09);
    --cl-shadow-lg:    0 20px 60px rgba(20, 20, 60, .14);
    --cl-radius:       16px;
    --cl-radius-sm:    10px;
    --cl-ease:         cubic-bezier(.22, 1, .36, 1);
}

@media (prefers-color-scheme: dark) {
    :root {
        --cl-bg:        #0f1117;
        --cl-card:      #181b24;
        --cl-text:      #eef0f6;
        --cl-text-soft: #b6bbc9;
        --cl-text-mute: #7d8496;
        --cl-border:    rgba(255, 255, 255, .07);
        --cl-shadow-sm: 0 2px 8px rgba(0, 0, 0, .35);
        --cl-shadow-md: 0 8px 28px rgba(0, 0, 0, .45);
        --cl-shadow-lg: 0 20px 60px rgba(0, 0, 0, .55);
    }
}

/* ---------- 全局 ---------- */
.changelog-page {
    background: var(--cl-bg);
    color: var(--cl-text);
    padding-bottom: 120px;
    font-family: -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}
.changelog-page .container {
    max-width: 1120px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ---------- 顶部滚动进度条 ---------- */
.cl-scroll-progress {
    position: fixed;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: linear-gradient(90deg,
        #7c5cff 0%, #b87cff 45%, #ff7ac9 100%);
    transform: scaleX(0);
    transform-origin: 0 50%;
    z-index: 9999;
    transition: transform .1s linear;
    box-shadow: 0 0 12px rgba(124, 92, 255, .55);
}

/* ================================================================
 * Hero
 * ================================================================ */
.changelog-hero {
    position: relative;
    overflow: hidden;
    padding: 96px 0 88px;
    background:
        radial-gradient(circle at 15% 15%, rgba(124, 92, 255, .18), transparent 55%),
        radial-gradient(circle at 85% 10%, rgba(255, 122, 201, .14), transparent 55%),
        linear-gradient(180deg, #f5f3ff 0%, var(--cl-bg) 100%);
}
@media (prefers-color-scheme: dark) {
    .changelog-hero {
        background:
            radial-gradient(circle at 15% 15%, rgba(124, 92, 255, .25), transparent 55%),
            radial-gradient(circle at 85% 10%, rgba(255, 122, 201, .18), transparent 55%),
            linear-gradient(180deg, #171a26 0%, var(--cl-bg) 100%);
    }
}

.changelog-hero-bg {
    position: absolute;
    inset: 0;
    pointer-events: none;
    overflow: hidden;
}
.cl-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(60px);
    opacity: .5;
    animation: cl-orb-float 18s ease-in-out infinite;
}
.cl-orb-1 {
    width: 340px; height: 340px;
    background: #a78bfa;
    top: -80px; left: -80px;
    animation-delay: 0s;
}
.cl-orb-2 {
    width: 280px; height: 280px;
    background: #ff7ac9;
    top: 40px; right: -60px;
    animation-delay: -6s;
}
.cl-orb-3 {
    width: 240px; height: 240px;
    background: #60a5fa;
    bottom: -100px; left: 40%;
    animation-delay: -12s;
}
@keyframes cl-orb-float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33%      { transform: translate(30px, -20px) scale(1.08); }
    66%      { transform: translate(-20px, 25px) scale(.95); }
}

.cl-grid-overlay {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(to right, rgba(124, 92, 255, .05) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(124, 92, 255, .05) 1px, transparent 1px);
    background-size: 44px 44px;
    -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%);
            mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%);
}

.changelog-hero-content {
    position: relative;
    text-align: center;
    z-index: 1;
}

.changelog-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    background: rgba(124, 92, 255, .1);
    color: var(--cl-primary);
    border: 1px solid rgba(124, 92, 255, .2);
    border-radius: 100px;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: .12em;
    text-transform: uppercase;
    margin-bottom: 22px;
    backdrop-filter: blur(8px);
}
.cl-eyebrow-dot {
    width: 6px; height: 6px;
    border-radius: 50%;
    background: var(--cl-primary);
    box-shadow: 0 0 0 0 rgba(124, 92, 255, .7);
    animation: cl-pulse 2s infinite;
}
@keyframes cl-pulse {
    0%   { box-shadow: 0 0 0 0 rgba(124, 92, 255, .6); }
    70%  { box-shadow: 0 0 0 8px rgba(124, 92, 255, 0); }
    100% { box-shadow: 0 0 0 0 rgba(124, 92, 255, 0); }
}

.changelog-title {
    font-size: clamp(34px, 5vw, 56px);
    line-height: 1.1;
    font-weight: 800;
    letter-spacing: -.025em;
    margin: 0 0 18px;
    color: var(--cl-text);
}
.cl-title-gradient {
    background: linear-gradient(120deg, #7c5cff 0%, #b87cff 40%, #ff7ac9 80%);
    -webkit-background-clip: text;
            background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
    margin-left: .18em;
}

.changelog-subtitle {
    font-size: 16px;
    color: var(--cl-text-soft);
    max-width: 480px;
    margin: 0 auto 42px;
    line-height: 1.65;
}

/* ---------- Hero 统计卡 ---------- */
.changelog-hero-stats {
    display: inline-flex;
    align-items: center;
    gap: 34px;
    padding: 20px 38px;
    background: rgba(255, 255, 255, .65);
    border: 1px solid rgba(255, 255, 255, .85);
    border-radius: 20px;
    box-shadow: 0 8px 32px rgba(20, 20, 60, .08);
    backdrop-filter: blur(20px) saturate(140%);
    -webkit-backdrop-filter: blur(20px) saturate(140%);
}
@media (prefers-color-scheme: dark) {
    .changelog-hero-stats {
        background: rgba(30, 34, 46, .7);
        border-color: rgba(255, 255, 255, .08);
    }
}
.changelog-hero-stat {
    text-align: center;
    min-width: 88px;
}
.changelog-hero-stat-value {
    font-size: 26px;
    font-weight: 800;
    background: linear-gradient(135deg, #7c5cff, #ff7ac9);
    -webkit-background-clip: text;
            background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
    letter-spacing: -.02em;
    line-height: 1.1;
}
.changelog-hero-stat-label {
    font-size: 12px;
    color: var(--cl-text-mute);
    margin-top: 6px;
    letter-spacing: .04em;
}
.changelog-hero-stat-divider {
    width: 1px;
    height: 34px;
    background: linear-gradient(180deg, transparent, rgba(124, 92, 255, .3), transparent);
}

/* ================================================================
 * 筛选栏
 * ================================================================ */
.changelog-filters {
    position: sticky;
    top: 0;
    z-index: 100;
    padding: 14px 0;
    background: rgba(247, 248, 252, .78);
    backdrop-filter: blur(20px) saturate(160%);
    -webkit-backdrop-filter: blur(20px) saturate(160%);
    border-bottom: 1px solid transparent;
    transition: border-color .3s ease, box-shadow .3s ease, background .3s ease;
}
@media (prefers-color-scheme: dark) {
    .changelog-filters {
        background: rgba(15, 17, 23, .8);
    }
}
.changelog-filters.is-stuck {
    border-bottom-color: var(--cl-border);
    box-shadow: 0 6px 24px rgba(20, 20, 60, .05);
}

.changelog-filter-row {
    display: flex;
    flex-wrap: wrap;
    gap: 22px 36px;
    align-items: center;
    justify-content: center;
}

.changelog-filter-group {
    display: flex;
    align-items: center;
    gap: 12px;
}
.changelog-filter-label {
    font-size: 12px;
    font-weight: 600;
    color: var(--cl-text-mute);
    letter-spacing: .1em;
    text-transform: uppercase;
}

.changelog-filter-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.changelog-chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 7px 14px;
    border-radius: 100px;
    font-size: 13px;
    font-weight: 500;
    color: var(--cl-text-soft);
    background: rgba(255, 255, 255, .7);
    border: 1px solid var(--cl-border);
    text-decoration: none;
    transition: all .25s var(--cl-ease);
    white-space: nowrap;
    position: relative;
    overflow: hidden;
}
@media (prefers-color-scheme: dark) {
    .changelog-chip {
        background: rgba(30, 34, 46, .7);
    }
}
.changelog-chip:hover {
    color: var(--cl-text);
    transform: translateY(-1px);
    border-color: rgba(124, 92, 255, .3);
    box-shadow: 0 4px 14px rgba(124, 92, 255, .12);
}
.changelog-chip.is-active {
    color: #fff;
    background: linear-gradient(135deg, var(--cl-primary), var(--cl-primary-soft));
    border-color: transparent;
    box-shadow: 0 6px 18px rgba(124, 92, 255, .35);
}
.changelog-chip.is-active::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(120deg, transparent 30%, rgba(255,255,255,.35) 50%, transparent 70%);
    transform: translateX(-100%);
    animation: cl-shine 2.4s ease-in-out infinite;
}
@keyframes cl-shine {
    0%, 100% { transform: translateX(-100%); }
    50%      { transform: translateX(100%); }
}

.changelog-chip-icon { font-size: 14px; line-height: 1; }
.changelog-chip-count {
    font-size: 11px;
    padding: 1px 7px;
    border-radius: 100px;
    background: rgba(0, 0, 0, .06);
    color: inherit;
    font-weight: 600;
    min-width: 18px;
    text-align: center;
}
.changelog-chip.is-active .changelog-chip-count {
    background: rgba(255, 255, 255, .25);
}

/* ================================================================
 * 时间线
 * ================================================================ */
.changelog-list-section {
    padding-top: 56px;
}

.changelog-timeline {
    position: relative;
    max-width: 880px;
    margin: 0 auto;
    padding-left: 40px;
}

/* 竖线 */
.changelog-timeline::before {
    content: '';
    position: absolute;
    top: 8px;
    bottom: 8px;
    left: 14px;
    width: 2px;
    background: linear-gradient(180deg,
        rgba(124, 92, 255, 0) 0%,
        rgba(124, 92, 255, .5) 8%,
        rgba(255, 122, 201, .5) 50%,
        rgba(124, 92, 255, .5) 92%,
        rgba(124, 92, 255, 0) 100%);
    border-radius: 2px;
}

/* ---------- 月份标题 ---------- */
.changelog-month {
    position: relative;
    margin-bottom: 44px;
}
.changelog-month:last-child { margin-bottom: 0; }

.changelog-month-head {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
    padding-left: 4px;
}
.changelog-month-dot {
    position: absolute;
    left: -34px;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--cl-primary), #ff7ac9);
    box-shadow: 0 0 0 4px rgba(124, 92, 255, .15);
    top: 6px;
}
.changelog-month-dot::after {
    content: '';
    position: absolute;
    inset: 3px;
    border-radius: 50%;
    background: #fff;
}
@media (prefers-color-scheme: dark) {
    .changelog-month-dot::after { background: #181b24; }
}

.changelog-month-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--cl-text);
    margin: 0;
    letter-spacing: -.01em;
}
.changelog-month-count {
    font-size: 12px;
    color: var(--cl-text-mute);
    padding: 3px 10px;
    border-radius: 100px;
    background: rgba(124, 92, 255, .08);
    font-weight: 600;
}

/* ---------- 卡片 ---------- */
.changelog-month-items {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.changelog-item {
    position: relative;
    display: flex;
    gap: 14px;
}

.changelog-item-line {
    position: absolute;
    left: -30px;
    top: 28px;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.changelog-item-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--item-color, var(--cl-primary));
    box-shadow: 0 0 0 3px rgba(255, 255, 255, .9);
    position: relative;
    transition: transform .3s var(--cl-ease);
}
@media (prefers-color-scheme: dark) {
    .changelog-item-dot {
        box-shadow: 0 0 0 3px #0f1117;
    }
}
.changelog-item:hover .changelog-item-dot {
    transform: scale(1.35);
}

.changelog-item-body {
    flex: 1;
    background: var(--cl-card);
    border-radius: var(--cl-radius);
    padding: 22px 26px 24px;
    border: 1px solid var(--cl-border);
    box-shadow: var(--cl-shadow-sm);
    position: relative;
    overflow: hidden;
    transition: transform .35s var(--cl-ease),
                box-shadow .35s var(--cl-ease),
                border-color .35s var(--cl-ease);
}

/* 左侧彩色描边 */
.changelog-item-body::before {
    content: '';
    position: absolute;
    left: 0; top: 0; bottom: 0;
    width: 3px;
    background: var(--item-color, var(--cl-primary));
    opacity: .85;
}

/* 悬停柔光 */
.changelog-item-body::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at var(--mx, 50%) var(--my, 0%),
        color-mix(in srgb, var(--item-color, #7c5cff) 12%, transparent), transparent 45%);
    opacity: 0;
    transition: opacity .4s ease;
    pointer-events: none;
}

.changelog-item:hover .changelog-item-body {
    transform: translateY(-3px);
    box-shadow: var(--cl-shadow-md);
    border-color: color-mix(in srgb, var(--item-color, #7c5cff) 30%, transparent);
}
.changelog-item:hover .changelog-item-body::after {
    opacity: 1;
}

/* 重点更新 */
.changelog-item.is-important .changelog-item-body {
    border-color: rgba(124, 92, 255, .35);
    box-shadow:
        0 0 0 1px rgba(124, 92, 255, .12),
        0 8px 28px rgba(124, 92, 255, .12);
}
.changelog-item.is-important .changelog-item-body::before {
    background: linear-gradient(180deg, #7c5cff, #ff7ac9);
    width: 4px;
    box-shadow: 0 0 12px rgba(124, 92, 255, .6);
}

/* ---------- 封面 ---------- */
.changelog-item-cover {
    margin: -22px -26px 18px;
    border-top-left-radius: var(--cl-radius);
    border-top-right-radius: var(--cl-radius);
    overflow: hidden;
    background: #f0f0f5;
    border-bottom: 1px solid var(--cl-border);
}
.changelog-item-cover img {
    display: block;
    width: 100%;
    max-height: 400px;
    object-fit: cover;
    cursor: zoom-in;
    transition: transform .5s var(--cl-ease);
}
.changelog-item-cover img:hover {
    transform: scale(1.02);
}

/* ---------- 头部 ---------- */
.changelog-item-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    flex-wrap: wrap;
    margin-bottom: 12px;
}
.changelog-item-head-left {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.changelog-badge {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 4px 11px;
    border-radius: 100px;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: .02em;
    white-space: nowrap;
}
.changelog-badge-feature  { background: rgba(124, 92, 255, .12); color: #6d4cf0; }
.changelog-badge-fix      { background: rgba(255,  92, 124, .12); color: #e03a63; }
.changelog-badge-improve  { background: rgba(255, 176,  32, .15); color: #c47b00; }
.changelog-badge-breaking { background: rgba(255, 122,  69, .14); color: #d8521f; }
.changelog-badge-security { background: rgba( 34, 197,  94, .14); color: #16a34a; }

.changelog-version {
    font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
    font-size: 12px;
    font-weight: 600;
    color: var(--cl-text-soft);
    padding: 3px 9px;
    border-radius: 6px;
    background: rgba(20, 20, 40, .05);
    border: 1px solid var(--cl-border);
    letter-spacing: .02em;
}
@media (prefers-color-scheme: dark) {
    .changelog-version { background: rgba(255, 255, 255, .05); }
}

.changelog-level-tag {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 12px;
    font-weight: 500;
    color: var(--cl-text-soft);
    padding: 3px 9px;
    border-radius: 6px;
    background: rgba(124, 92, 255, .06);
    border: 1px solid rgba(124, 92, 255, .15);
}

.changelog-important-tag {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 11px;
    font-weight: 700;
    color: #fff;
    padding: 3px 9px;
    border-radius: 100px;
    background: linear-gradient(135deg, #7c5cff, #ff7ac9);
    box-shadow: 0 2px 8px rgba(124, 92, 255, .35);
    letter-spacing: .04em;
}

.changelog-new-tag {
    display: inline-flex;
    align-items: center;
    font-size: 10px;
    font-weight: 800;
    color: #fff;
    padding: 3px 8px;
    border-radius: 100px;
    background: linear-gradient(135deg, #ff5c7c, #ff7ac9);
    letter-spacing: .08em;
    animation: cl-new-pulse 2s ease-in-out infinite;
}
@keyframes cl-new-pulse {
    0%, 100% { transform: scale(1);    box-shadow: 0 0 0 0 rgba(255, 92, 124, .6); }
    50%      { transform: scale(1.04); box-shadow: 0 0 0 6px rgba(255, 92, 124, 0); }
}

.changelog-item-time {
    font-size: 12.5px;
    color: var(--cl-text-mute);
    font-variant-numeric: tabular-nums;
    letter-spacing: .02em;
}

/* ---------- 标题 ---------- */
.changelog-item-title {
    font-size: 17px;
    font-weight: 600;
    color: var(--cl-text);
    margin: 4px 0 14px;
    line-height: 1.5;
    letter-spacing: -.005em;
}

/* ---------- 内容列表 ---------- */
.changelog-item-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 9px;
}
.changelog-item-line-item {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: 14.5px;
    line-height: 1.65;
    color: var(--cl-text-soft);
}
.changelog-item-bullet {
    flex-shrink: 0;
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: var(--item-color, var(--cl-primary));
    opacity: .75;
    margin-top: 9px;
}

/* 行内链接 */
.cl-inline-link {
    color: var(--cl-primary);
    text-decoration: none;
    border-bottom: 1px dashed rgba(124, 92, 255, .5);
    transition: border-bottom-style .2s ease, color .2s ease;
}
.cl-inline-link:hover {
    border-bottom-style: solid;
    color: var(--cl-primary-dark);
}

/* 内容里的图片 */
.changelog-item-line-item.is-image {
    display: block;
    padding-left: 0;
    margin: 6px 0;
}
.changelog-item-line-item.is-image .changelog-item-bullet {
    display: none;
}
.cl-figure {
    margin: 0;
    border-radius: var(--cl-radius-sm);
    overflow: hidden;
    background: #f5f5f8;
    border: 1px solid var(--cl-border);
}
.cl-figure img {
    display: block;
    width: 100%;
    max-height: 460px;
    object-fit: contain;
    background: #fafafa;
    cursor: zoom-in;
    transition: transform .5s var(--cl-ease);
}
.cl-figure img:hover {
    transform: scale(1.01);
}
.cl-figure figcaption {
    padding: 9px 14px;
    font-size: 12px;
    color: var(--cl-text-mute);
    background: rgba(0, 0, 0, .02);
    border-top: 1px solid var(--cl-border);
    text-align: center;
}

/* ---------- 标签 ---------- */
.changelog-item-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-top: 16px;
    padding-top: 14px;
    border-top: 1px dashed var(--cl-border);
}
.changelog-tag {
    font-size: 12px;
    color: var(--cl-primary);
    background: rgba(124, 92, 255, .07);
    padding: 3px 10px;
    border-radius: 100px;
    font-weight: 500;
    transition: background .2s ease;
}
.changelog-tag:hover {
    background: rgba(124, 92, 255, .15);
}

/* ---------- 时间线收尾 ---------- */
.changelog-timeline-end {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    padding: 40px 0 0;
}
.cl-end-dot {
    position: absolute;
    left: 8px;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: linear-gradient(135deg, #7c5cff, #ff7ac9);
    box-shadow: 0 0 0 4px rgba(124, 92, 255, .15);
}
.cl-end-text {
    font-size: 13px;
    color: var(--cl-text-mute);
    letter-spacing: .04em;
}

/* ---------- 空状态 ---------- */
.changelog-empty {
    text-align: center;
    padding: 90px 20px;
    background: var(--cl-card);
    border-radius: var(--cl-radius);
    border: 1px dashed var(--cl-border);
}
.changelog-empty-icon {
    color: var(--cl-primary);
    opacity: .35;
    margin-bottom: 18px;
    display: flex;
    justify-content: center;
}
.changelog-empty-title {
    font-size: 17px;
    font-weight: 600;
    color: var(--cl-text-soft);
    margin: 0 0 6px;
}
.changelog-empty-sub {
    font-size: 13.5px;
    color: var(--cl-text-mute);
    margin: 0;
}
.changelog-empty-sub a {
    color: var(--cl-primary);
    text-decoration: none;
    margin-left: 4px;
    font-weight: 600;
}

/* ================================================================
 * 进场动画
 * ================================================================ */
[data-animate] {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity .7s var(--cl-ease), transform .7s var(--cl-ease);
    will-change: opacity, transform;
}
[data-animate].is-visible {
    opacity: 1;
    transform: none;
}

/* ================================================================
 * 图片灯箱
 * ================================================================ */
.cl-lightbox {
    position: fixed;
    inset: 0;
    z-index: 9998;
    display: flex;
    align-items: center;
    justify-content: center;
}
.cl-lightbox[hidden] { display: none; }
.cl-lightbox-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, .85);
    backdrop-filter: blur(6px);
    cursor: zoom-out;
    animation: cl-fade-in .25s ease;
}
.cl-lightbox-content {
    position: relative;
    max-width: 92vw;
    max-height: 92vh;
    animation: cl-zoom-in .32s var(--cl-ease);
}
.cl-lightbox-content img {
    display: block;
    max-width: 92vw;
    max-height: 92vh;
    border-radius: 10px;
    box-shadow: 0 24px 80px rgba(0, 0, 0, .6);
}
.cl-lightbox-close {
    position: absolute;
    top: -16px;
    right: -16px;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: none;
    background: #fff;
    color: #333;
    font-size: 22px;
    line-height: 1;
    cursor: pointer;
    box-shadow: 0 6px 20px rgba(0, 0, 0, .3);
    transition: transform .2s ease, background .2s ease;
}
.cl-lightbox-close:hover {
    background: #f5f5f5;
    transform: rotate(90deg);
}

@keyframes cl-fade-in {
    from { opacity: 0; }
    to   { opacity: 1; }
}
@keyframes cl-zoom-in {
    from { opacity: 0; transform: scale(.9); }
    to   { opacity: 1; transform: scale(1); }
}

/* ================================================================
 * 回到顶部
 * ================================================================ */
.cl-to-top {
    position: fixed;
    right: 26px;
    bottom: 26px;
    width: 46px;
    height: 46px;
    border-radius: 50%;
    border: none;
    background: linear-gradient(135deg, var(--cl-primary), #ff7ac9);
    color: #fff;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 8px 24px rgba(124, 92, 255, .4);
    opacity: 0;
    pointer-events: none;
    transform: translateY(12px) scale(.9);
    transition: all .3s var(--cl-ease);
    z-index: 500;
}
.cl-to-top.is-visible {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0) scale(1);
}
.cl-to-top:hover {
    transform: translateY(-2px) scale(1.05);
    box-shadow: 0 12px 32px rgba(124, 92, 255, .55);
}

/* ================================================================
 * 响应式
 * ================================================================ */
@media (max-width: 720px) {
    .changelog-hero { padding: 64px 0 56px; }
    .changelog-hero-stats {
        gap: 18px;
        padding: 16px 22px;
        flex-wrap: wrap;
        justify-content: center;
    }
    .changelog-hero-stat { min-width: 74px; }
    .changelog-hero-stat-value { font-size: 22px; }

    .changelog-filter-row { flex-direction: column; align-items: stretch; }
    .changelog-filter-group { flex-wrap: wrap; }
    .changelog-filter-chips { width: 100%; overflow-x: auto; flex-wrap: nowrap;
        padding-bottom: 4px;
        scrollbar-width: none; }
    .changelog-filter-chips::-webkit-scrollbar { display: none; }

    .changelog-timeline { padding-left: 26px; }
    .changelog-timeline::before { left: 8px; }
    .changelog-month-dot { left: -26px; top: 4px; width: 12px; height: 12px; }
    .changelog-item-line { left: -22px; top: 24px; }
    .changelog-item-dot { width: 9px; height: 9px; }

    .changelog-item-body {
        padding: 18px 18px 20px;
        border-radius: 12px;
    }
    .changelog-item-cover { margin: -18px -18px 14px; }
    .changelog-item-title { font-size: 15.5px; }
    .changelog-item-line-item { font-size: 14px; }

    .cl-to-top { right: 16px; bottom: 16px; }
}

/* 减少动效 */
@media (prefers-reduced-motion: reduce) {
    .cl-orb,
    .cl-eyebrow-dot,
    .changelog-new-tag,
    .changelog-chip.is-active::after {
        animation: none !important;
    }
    [data-animate] {
        opacity: 1 !important;
        transform: none !important;
    }
}

/* ==================================================================
 * 折叠 / 展开
 * ================================================================== */

/* 列表上方工具条 */
.changelog-list-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    max-width: 880px;
    margin: 0 auto 20px;
    padding: 0 4px;
}
.changelog-list-toolbar-hint {
    font-size: 12.5px;
    color: var(--cl-text-mute);
    letter-spacing: .02em;
}
.changelog-list-toolbar-actions {
    display: flex;
    gap: 8px;
}
.cl-btn-ghost {
    padding: 6px 14px;
    border-radius: 100px;
    font-size: 12.5px;
    font-weight: 500;
    color: var(--cl-text-soft);
    background: rgba(255, 255, 255, .7);
    border: 1px solid var(--cl-border);
    cursor: pointer;
    transition: all .2s var(--cl-ease);
}
@media (prefers-color-scheme: dark) {
    .cl-btn-ghost { background: rgba(30, 34, 46, .7); }
}
.cl-btn-ghost:hover {
    color: var(--cl-primary);
    border-color: rgba(124, 92, 255, .35);
    background: rgba(124, 92, 255, .06);
    transform: translateY(-1px);
}

/* 触发区（点击折叠/展开） */
.changelog-item-trigger {
    cursor: pointer;
    user-select: none;
    margin: -6px -10px;
    padding: 6px 10px;
    border-radius: 10px;
    transition: background .25s ease;
    outline: none;
}
.changelog-item-trigger:hover {
    background: rgba(124, 92, 255, .035);
}
.changelog-item-trigger:focus-visible {
    box-shadow: 0 0 0 2px rgba(124, 92, 255, .45);
}

/* 标题行 + 箭头 */
.changelog-item-title-row {
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 4px 0 6px;
}
.changelog-item-title-row .changelog-item-title {
    margin: 0;
    flex: 1;
}

.changelog-item-toggle {
    flex-shrink: 0;
    width: 26px;
    height: 26px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--cl-text-mute);
    background: rgba(20, 20, 40, .04);
    border-radius: 50%;
    transition: all .3s var(--cl-ease);
}
@media (prefers-color-scheme: dark) {
    .changelog-item-toggle { background: rgba(255, 255, 255, .06); }
}
.changelog-item-trigger:hover .changelog-item-toggle {
    color: var(--cl-primary);
    background: rgba(124, 92, 255, .12);
}
.changelog-item.is-expanded .changelog-item-toggle {
    transform: rotate(180deg);
    color: var(--cl-primary);
    background: rgba(124, 92, 255, .12);
}

/* 摘要 */
.changelog-item-summary {
    font-size: 13.5px;
    color: var(--cl-text-mute);
    line-height: 1.6;
    margin: 4px 0 0;
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* 展开提示 */
.changelog-item-more-hint {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    margin-top: 10px;
    font-size: 11.5px;
    font-weight: 600;
    color: var(--item-color, var(--cl-primary));
    letter-spacing: .02em;
    opacity: .75;
    transition: opacity .2s ease;
}
.changelog-item-trigger:hover .changelog-item-more-hint {
    opacity: 1;
}
.changelog-item.is-expanded .changelog-item-more-hint {
    display: none;
}

/* 折叠内容 */
.changelog-item-collapse {
    display: grid;
    grid-template-rows: 0fr;
    transition: grid-template-rows .38s var(--cl-ease);
}
.changelog-item.is-expanded .changelog-item-collapse {
    grid-template-rows: 1fr;
}
.changelog-item-collapse-inner {
    overflow: hidden;
    min-height: 0;
}
.changelog-item-collapse-inner > * {
    margin-top: 16px;
}
.changelog-item-collapse-inner > *:first-child {
    margin-top: 18px;
}

/* 展开后整体描边更明显 */
.changelog-item.is-expanded .changelog-item-body {
    box-shadow: var(--cl-shadow-md);
    border-color: color-mix(in srgb, var(--item-color, #7c5cff) 25%, transparent);
}

/* 手机端 */
@media (max-width: 720px) {
    .changelog-list-toolbar {
        flex-direction: column;
        align-items: flex-start;
    }
    .changelog-item-summary {
        -webkit-line-clamp: 2;
    }
    .changelog-item-title-row .changelog-item-title {
        font-size: 15px;
    }
}