.page-about {
    --about-green-glow: rgba(57, 255, 20, 0.28);
    --about-blue-glow: rgba(0, 229, 255, 0.22);
    --about-gold-glow: rgba(245, 197, 24, 0.18);
    --about-grid: rgba(0, 229, 255, 0.05);
    position: relative;
    color: var(--text);
    font-family: var(--sans);
    overflow-x: clip;
    background:
        radial-gradient(ellipse 90% 40% at 100% 0%, rgba(0, 229, 255, 0.05), transparent 60%),
        linear-gradient(180deg, #0A0E17, #0B1723 45%, #0A0E17);
}

/* ---- 面包屑 ---- */
.page-about .breadcrumbs {
    position: relative;
    z-index: 2;
    padding: 1.25rem 1.25rem 0;
    font-size: 0.75rem;
    letter-spacing: 0.06em;
    color: var(--text-dim);
    display: flex;
}

.page-about .breadcrumbs ol {
    list-style: none;
    display: flex;
    gap: 0.5rem;
    margin: 0;
    padding: 0;
}

.page-about .breadcrumbs li + li::before {
    content: "/";
    margin-right: 0.5rem;
    color: var(--line);
}

.page-about .breadcrumbs a {
    color: var(--blue);
    text-decoration: none;
}

.page-about .breadcrumbs a:hover {
    color: var(--neon);
}

/* ---- 封面首屏 ---- */
.page-about .about-cover {
    position: relative;
    min-height: calc(100vh - var(--header-h));
    display: flex;
    align-items: center;
    padding: 4.5rem 0 4rem;
    overflow: hidden;
}

.page-about .about-cover-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(0, 229, 255, 0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 229, 255, 0.04) 1px, transparent 1px);
    background-size: 52px 52px;
    pointer-events: none;
}

.page-about .about-cover-scan {
    position: absolute;
    left: 0;
    right: 0;
    top: 20%;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--neon), transparent);
    opacity: 0.45;
    pointer-events: none;
}

.page-about .about-cover-inner {
    position: relative;
    z-index: 2;
    width: 100%;
}

.page-about .about-cover-meta {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    margin-bottom: 1.4rem;
}

.page-about .about-live-pill {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    padding: 0.35rem 0.8rem;
    border: 1px solid rgba(57, 255, 20, 0.3);
    border-radius: 999px;
    background: rgba(57, 255, 20, 0.06);
    font-size: 0.72rem;
    letter-spacing: 0.1em;
    color: var(--neon);
}

.page-about .about-live-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--neon);
    box-shadow: 0 0 10px var(--about-green-glow);
    animation: aboutPulseSignal 2.4s infinite ease-in-out;
}

@keyframes aboutPulseSignal {
    0%,
    100% {
        opacity: 0.5;
        transform: scale(0.85);
    }
    50% {
        opacity: 1;
        transform: scale(1.2);
    }
}

.page-about .about-meta-divider {
    color: var(--line);
    font-size: 0.8rem;
}

.page-about .about-meta-text {
    font-size: 0.72rem;
    letter-spacing: 0.12em;
    color: var(--text-dim);
    text-transform: uppercase;
}

.page-about .about-cover-kicker {
    margin: 0 0 1rem;
    font-size: 0.72rem;
    letter-spacing: 0.4em;
    text-transform: uppercase;
    color: var(--blue);
}

.page-about .about-cover-title {
    margin: 0;
    font-family: var(--serif);
    font-size: clamp(2.4rem, 8vw, 4.5rem);
    font-weight: 700;
    line-height: 1.14;
    letter-spacing: 0.02em;
    color: var(--text);
}

.page-about .about-cover-lead {
    max-width: 42rem;
    margin: 1.5rem 0 2rem;
    font-size: 1rem;
    line-height: 1.9;
    color: var(--text-dim);
}

.page-about .about-cover-nums {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.75rem;
    max-width: 32rem;
    margin-bottom: 2rem;
    padding: 1.25rem 0;
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
}

.page-about .about-cover-num {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.page-about .about-cover-num .data-number {
    font-family: var(--sans);
    font-weight: 800;
    font-size: clamp(1.4rem, 4.4vw, 2.8rem);
    line-height: 1;
    color: var(--neon);
    letter-spacing: 0.01em;
}

.page-about .about-cover-num:nth-child(2) .data-number {
    color: var(--gold);
}

.page-about .about-cover-num-label {
    font-size: 0.72rem;
    letter-spacing: 0.1em;
    color: var(--text-dim);
}

.page-about .about-cover-index {
    max-width: 32rem;
    padding: 1rem 1.25rem;
    background: var(--glass);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: 12px;
    display: grid;
    gap: 0.4rem;
}

.page-about .about-index-title {
    font-size: 0.68rem;
    letter-spacing: 0.24em;
    color: var(--gold);
    text-transform: uppercase;
    margin-bottom: 0.3rem;
}

.page-about .about-index-link {
    display: inline-flex;
    align-items: baseline;
    gap: 0.75rem;
    color: var(--text);
    text-decoration: none;
    font-size: 0.95rem;
    padding: 0.3rem 0;
    border-bottom: 1px dashed transparent;
    transition: color 0.18s ease, border-color 0.18s ease;
}

.page-about .about-index-num {
    font-style: normal;
    font-size: 0.68rem;
    color: var(--blue);
    letter-spacing: 0.06em;
    width: 1.25rem;
}

.page-about .about-index-link:hover {
    color: var(--neon);
    border-bottom-color: rgba(57, 255, 20, 0.5);
}

/* ---- 章节骨架 ---- */
.page-about .about-story,
.page-about .about-milestones,
.page-about .about-coverage,
.page-about .about-mobile {
    position: relative;
    padding: 4.5rem 0 3.5rem;
}

.page-about .about-section-head {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 1rem;
}

.page-about .about-section-head .section-index {
    font-size: 0.68rem;
    font-weight: 700;
    color: var(--gold);
    letter-spacing: 0.3em;
    line-height: 2.8;
}

.page-about .about-section-title {
    font-family: var(--serif);
    font-size: clamp(1.8rem, 5vw, 3rem);
    line-height: 1.25;
    margin: 0;
    color: var(--text);
}

.page-about .about-section-desc {
    max-width: 38rem;
    margin: -0.2rem 0 1.5rem;
    color: var(--text-dim);
    font-size: 0.95rem;
    line-height: 1.8;
}

/* ---- 品牌故事 ---- */
.page-about .about-story-grid {
    display: grid;
    gap: 2rem;
    margin-top: 2rem;
}

.page-about .about-story-text p {
    margin: 0 0 1.1rem;
    line-height: 1.9;
    color: var(--text-dim);
    font-size: 0.98rem;
}

.page-about .about-story-text p:first-of-type::first-letter {
    font-family: var(--serif);
    font-size: 2.6rem;
    float: left;
    line-height: 1;
    margin: 0.15rem 0.5rem 0 0;
    color: var(--neon);
}

.page-about .about-story-panel {
    padding: 1.75rem 1.5rem;
    border-radius: 16px;
    background:
        linear-gradient(135deg, rgba(0, 229, 255, 0.06), transparent),
        var(--glass);
    border: 1px solid rgba(0, 229, 255, 0.12);
    backdrop-filter: blur(8px);
}

.page-about .about-panel-label {
    margin: 0 0 1.2rem;
    font-size: 0.72rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--blue);
}

.page-about .about-panel-list {
    list-style: none;
    margin: 0 0 1.5rem;
    padding: 0;
    display: grid;
    gap: 0.9rem;
}

.page-about .about-panel-list li {
    display: grid;
    gap: 0.2rem;
}

.page-about .about-panel-list strong {
    font-size: 0.78rem;
    color: var(--gold);
    letter-spacing: 0.06em;
}

.page-about .about-panel-list span {
    font-size: 0.9rem;
    color: var(--text);
    opacity: 0.85;
}

.page-about .about-cta {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--neon);
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 600;
    padding: 0.65rem 1.2rem;
    border: 1px solid rgba(57, 255, 20, 0.4);
    border-radius: 999px;
    transition: background 0.18s ease, color 0.18s ease;
}

.page-about .about-cta:hover {
    background: rgba(57, 255, 20, 0.1);
    color: var(--text);
}

/* ---- 里程碑节点 ---- */
.page-about .about-milestones {
    padding-bottom: 4rem;
}

.page-about .about-timeline {
    position: relative;
    list-style: none;
    margin: 2rem 0 1.5rem;
    padding: 2rem 1.25rem 2rem;
    display: flex;
    gap: 1rem;
    overflow-x: auto;
    scroll-snap-type: x proximity;
    scrollbar-width: thin;
}

.page-about .about-timeline::before {
    content: "";
    position: absolute;
    left: 1.5rem;
    right: 1.5rem;
    top: 1.7rem;
    height: 2px;
    background: linear-gradient(90deg, var(--blue), var(--neon), var(--blue), var(--line));
    opacity: 0.8;
}

.page-about .about-timeline-item {
    flex: 0 0 76%;
    max-width: 300px;
    scroll-snap-align: center;
    position: relative;
}

.page-about .about-timeline-dot {
    position: absolute;
    top: -1.2rem;
    left: calc(50% - 7px);
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--neon);
    box-shadow: 0 0 14px var(--about-green-glow);
    border: 3px solid var(--bg-main);
    z-index: 2;
}

.page-about .about-timeline-card {
    position: relative;
    z-index: 1;
    background: var(--glass);
    border: 1px solid rgba(0, 229, 255, 0.12);
    border-radius: 14px;
    padding: 1.5rem 1.25rem 1.4rem;
    backdrop-filter: blur(10px);
    transition: border-color 0.2s ease, transform 0.2s ease, background 0.2s ease;
}

.page-about .about-timeline-card:hover,
.page-about .about-timeline-card:focus-within {
    border-color: rgba(57, 255, 20, 0.5);
    background: rgba(57, 255, 20, 0.05);
    transform: translateY(-3px);
}

.page-about .about-timeline-year {
    display: block;
    font-family: var(--serif);
    font-size: 1.1rem;
    color: var(--gold);
    letter-spacing: 0.16em;
    margin-bottom: 0.6rem;
}

.page-about .about-timeline-card h3 {
    font-family: var(--serif);
    font-size: 1.15rem;
    margin: 0 0 0.5rem;
    color: var(--text);
}

.page-about .about-timeline-card p {
    margin: 0;
    font-size: 0.88rem;
    line-height: 1.75;
    color: var(--text-dim);
}

.page-about .about-milestone-figure {
    margin: 2rem 0 0;
    border-radius: 18px;
    overflow: hidden;
    background: var(--bg-panel);
    border: 1px solid var(--line);
}

.page-about .about-milestone-figure img {
    width: 100%;
    height: auto;
    display: block;
}

/* ---- 数据覆盖范围 ---- */
.page-about .about-coverage {
    background:
        radial-gradient(ellipse 60% 45% at 80% 20%, rgba(0, 229, 255, 0.08), transparent),
        linear-gradient(180deg, rgba(15, 31, 46, 0.45), rgba(10, 14, 23, 0.2));
}

.page-about .about-coverage-wrap {
    display: grid;
    gap: 2rem;
    margin-top: 1.5rem;
}

.page-about .about-coverage-map {
    position: relative;
    border-radius: 18px;
    overflow: hidden;
    border: 1px solid rgba(0, 229, 255, 0.14);
    background: #07111f;
}

.page-about .about-coverage-map img {
    width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
}

.page-about .about-map-legend {
    position: absolute;
    left: 1rem;
    right: 1rem;
    bottom: 1rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem 1rem;
    padding: 0.7rem 0.9rem;
    background: rgba(7, 17, 31, 0.72);
    backdrop-filter: blur(8px);
    border-radius: 10px;
    border: 1px solid rgba(255, 255, 255, 0.06);
}

.page-about .about-legend-item {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.72rem;
    color: var(--text-dim);
}

.page-about .about-legend-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    display: inline-block;
}

.page-about .about-legend-dot--neon {
    background: var(--neon);
    box-shadow: 0 0 8px var(--about-green-glow);
}

.page-about .about-legend-dot--blue {
    background: var(--blue);
    box-shadow: 0 0 8px var(--about-blue-glow);
}

.page-about .about-legend-dot--gold {
    background: var(--gold);
    box-shadow: 0 0 8px var(--about-gold-glow);
}

.page-about .about-coverage-panel {
    padding: 1.6rem 1.4rem;
    background: var(--glass);
    border-radius: 18px;
    border: 1px solid var(--line);
    backdrop-filter: blur(8px);
}

.page-about .about-data-row {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    padding: 0.85rem 0;
    border-bottom: 1px solid var(--line);
}

.page-about .about-data-row:last-of-type {
    border-bottom: none;
}

.page-about .about-data-name {
    font-size: 0.82rem;
    letter-spacing: 0.08em;
    color: var(--text-dim);
}

.page-about .about-data-value {
    font-family: var(--sans);
    font-weight: 800;
    font-size: 1.35rem;
    color: var(--neon);
    letter-spacing: 0.04em;
}

.page-about .about-data-row:nth-child(2) .about-data-value,
.page-about .about-data-row:nth-child(4) .about-data-value {
    color: var(--gold);
}

.page-about .about-coverage-note {
    margin: 1.2rem 0 0;
    font-size: 0.85rem;
    line-height: 1.8;
    color: var(--text-dim);
}

.page-about .about-coverage-more {
    margin-top: 1.2rem;
    border-top: 1px solid var(--line);
}

.page-about .about-coverage-more summary {
    cursor: pointer;
    list-style: none;
    padding: 0.75rem 0;
    font-size: 0.82rem;
    color: var(--blue);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.page-about .about-coverage-more summary::-webkit-details-marker {
    display: none;
}

.page-about .about-coverage-more summary::before {
    content: "＋";
    color: var(--gold);
    font-weight: 700;
}

.page-about .about-coverage-more[open] summary::before {
    content: "－";
}

.page-about .about-coverage-list {
    list-style: none;
    margin: 0;
    padding: 0 0 0.8rem 0.4rem;
    display: grid;
    gap: 0.5rem;
}

.page-about .about-coverage-list li {
    font-size: 0.85rem;
    color: var(--text-dim);
    line-height: 1.6;
    padding-left: 0.85rem;
    border-left: 2px solid rgba(57, 255, 20, 0.3);
}

.page-about .about-coverage-link {
    display: inline-flex;
    margin-top: 1.2rem;
    color: var(--blue);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    gap: 0.4rem;
    align-items: center;
}

.page-about .about-coverage-link:hover {
    color: var(--gold);
}

.page-about .about-coverage-link::after {
    content: "→";
    color: var(--gold);
    transition: margin-left 0.18s ease;
}

.page-about .about-coverage-link:hover::after {
    margin-left: 0.3rem;
}

/* ---- 移动端优化与首访 ---- */
.page-about .about-mobile {
    background: linear-gradient(180deg, rgba(10, 14, 23, 0) 0%, rgba(15, 31, 46, 0.5) 100%);
}

.page-about .about-mobile-grid {
    display: grid;
    gap: 2rem;
    margin-top: 2.2rem;
}

.page-about .about-mobile-lead {
    font-family: var(--serif);
    font-size: 1.6rem;
    line-height: 1.4;
    color: var(--text);
    margin: 0 0 1.2rem;
}

.page-about .about-mobile-content > p {
    color: var(--text-dim);
    line-height: 1.85;
    font-size: 0.95rem;
    margin: 0 0 1.4rem;
}

.page-about .about-mobile-features {
    list-style: none;
    margin: 0 0 2rem;
    padding: 0;
    display: grid;
    gap: 1rem;
}

.page-about .about-mobile-features li {
    padding: 1.1rem 1.2rem;
    border-radius: 14px;
    background: rgba(255, 255, 255, 0.035);
    border-left: 3px solid var(--neon);
}

.page-about .about-mobile-features h3 {
    margin: 0 0 0.35rem;
    font-size: 0.95rem;
    color: var(--gold);
    letter-spacing: 0.04em;
}

.page-about .about-mobile-features p {
    margin: 0;
    font-size: 0.85rem;
    line-height: 1.7;
    color: var(--text-dim);
}

.page-about .about-mobile-figure {
    margin: 0 auto;
    width: min(320px, 100%);
    padding: 1rem 1rem 0;
    background:
        radial-gradient(ellipse 60% 30% at 50% 0%, rgba(57, 255, 20, 0.08), transparent),
        var(--glass);
    border-radius: 28px 28px 18px 18px;
    border: 1px solid rgba(0, 229, 255, 0.12);
}

.page-about .about-mobile-figure img {
    display: block;
    width: 100%;
    height: auto;
    object-fit: cover;
    border-radius: 18px 18px 10px 10px;
    box-shadow: 0 18px 40px rgba(0, 0, 0, 0.45);
}

/* ---- 信任声明 ---- */
.page-about .about-trust {
    padding: 4rem 0 5rem;
    border-top: 1px solid var(--line);
    background:
        radial-gradient(ellipse 80% 60% at 50% 100%, rgba(57, 255, 20, 0.07), transparent),
        #0a0e17;
}

.page-about .about-trust-inner {
    max-width: 720px;
    text-align: center;
}

.page-about .about-trust-text {
    font-family: var(--serif);
    font-size: 1.1rem;
    line-height: 2;
    color: var(--text);
    margin: 0 0 1.5rem;
}

.page-about .about-trust-actions {
    display: flex;
    justify-content: center;
    gap: 1.2rem;
}

.page-about .about-trust-actions a {
    color: var(--blue);
    text-decoration: none;
    font-size: 0.85rem;
    letter-spacing: 0.08em;
    padding: 0.6rem 1.1rem;
    border: 1px solid rgba(0, 229, 255, 0.25);
    border-radius: 999px;
    transition: border-color 0.18s ease, color 0.18s ease;
}

.page-about .about-trust-actions a:hover {
    border-color: var(--neon);
    color: var(--neon);
}

/* ---- 桌面端布局 ---- */
@media (min-width: 860px) {
    .page-about .breadcrumbs {
        padding-left: 0;
        padding-right: 0;
    }

    .page-about .about-cover {
        padding: 3rem 0 5rem;
    }

    .page-about .about-story,
    .page-about .about-milestones,
    .page-about .about-coverage,
    .page-about .about-mobile {
        padding: 6rem 0 4.5rem;
    }

    .page-about .about-story-grid {
        grid-template-columns: 1.05fr 0.95fr;
        gap: 3.5rem;
    }

    .page-about .about-timeline {
        padding: 2.5rem 0 1rem;
        gap: 1.5rem;
        overflow: visible;
    }

    .page-about .about-timeline::before {
        left: 2%;
        right: 2%;
        top: 1.7rem;
    }

    .page-about .about-timeline-item {
        flex: 1 1 0;
        max-width: none;
        scroll-snap-align: start;
    }

    .page-about .about-coverage-wrap {
        grid-template-columns: 1.1fr 0.9fr;
        gap: 1.25rem;
        align-items: stretch;
    }

    .page-about .about-mobile-grid {
        grid-template-columns: 1.15fr 0.85fr;
        gap: 3rem;
        align-items: center;
    }

    .page-about .about-mobile-figure {
        margin: 0;
        width: auto;
        max-width: 360px;
        justify-self: end;
    }

    .page-about .about-cover-index {
        max-width: 34rem;
    }

    .page-about .about-cover-lead {
        margin-right: 10%;
    }
}

@media (min-width: 1180px) {
    .page-about .about-cover-nums {
        grid-template-columns: 180px 180px 220px;
    }

    .page-about .about-timeline-item {
        padding-top: 0.2rem;
    }
}