/* ===== 品牌故事页专属样式 ===== */
.page-about {
    --about-grid-alpha: rgba(0, 229, 255, 0.06);
    --about-grid-size: 22px;
    background:
        radial-gradient(circle at 82% 8%, rgba(157, 78, 221, 0.16), transparent 34%),
        linear-gradient(180deg, rgba(11, 15, 20, 0.2) 0%, rgba(17, 24, 32, 0.4) 100%);
}

.page-about .section {
    padding-top: 72px;
    padding-bottom: 72px;
}

.page-about .container {
    max-width: var(--container-w);
    margin: 0 auto;
    padding-left: clamp(20px, 5vw, 48px);
    padding-right: clamp(20px, 5vw, 48px);
}

/* ===== Hero ===== */
.page-about .about-hero {
    position: relative;
    padding: 48px clamp(20px, 5vw, 64px) 56px;
    border-bottom: 10px solid var(--c-gold);
    background:
        linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px),
        radial-gradient(circle at 78% 20%, rgba(0, 229, 255, 0.12), transparent 32%),
        var(--c-bg);
    background-size:
        var(--about-grid-size) var(--about-grid-size),
        var(--about-grid-size) var(--about-grid-size),
        auto,
        auto;
}

.page-about .about-hero-inner {
    position: relative;
    max-width: var(--container-w);
    margin: 0 auto;
}

.page-about .about-hero-inner::after {
    content: 'RECORD';
    position: absolute;
    right: -8px;
    bottom: 8px;
    font-size: clamp(64px, 12vw, 160px);
    font-weight: 900;
    color: transparent;
    -webkit-text-stroke: 1px rgba(212, 175, 55, 0.18);
    letter-spacing: -0.03em;
    pointer-events: none;
    white-space: nowrap;
    z-index: 0;
}

.page-about .about-hero-grid,
.page-about .about-hero-copy {
    position: relative;
    z-index: 1;
}

.page-about .about-hero-copy h1 {
    font-family: var(--font-heading);
    font-size: clamp(30px, 4.6vw, 54px);
    font-weight: 900;
    line-height: 1.16;
    letter-spacing: -0.01em;
    color: var(--c-text);
    margin: 16px 0 0;
}

.page-about .about-eyebrow {
    display: inline-block;
    padding: 4px 12px;
    background: rgba(212, 175, 55, 0.12);
    border: 1px solid var(--c-gold);
    color: var(--c-gold-light);
    font-size: 13px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.page-about .about-hero-lead {
    margin-top: 20px;
    font-size: clamp(16px, 2vw, 20px);
    line-height: 1.8;
    color: var(--c-text2);
    max-width: 58ch;
}

.page-about .about-hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-top: 28px;
}

/* ===== 面包屑 ===== */
.page-about .breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--c-text2);
    margin-bottom: 28px;
}

.page-about .breadcrumb-link {
    color: var(--c-cyan);
    text-decoration: none;
}

.page-about .breadcrumb-link:hover {
    text-decoration: underline;
}

.page-about .breadcrumb-sep {
    color: var(--c-gold);
}

.page-about .breadcrumb-current {
    color: var(--c-text2);
}

/* ===== Hero 环形图与数据 ===== */
.page-about .about-hero-meta {
    margin-top: 36px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.page-about .about-ring-wrap {
    position: relative;
    width: 180px;
    height: 180px;
    flex: 0 0 auto;
}

.page-about .about-ring-svg {
    width: 100%;
    height: 100%;
    transform: rotate(-90deg);
}

.page-about .about-ring-track {
    fill: none;
    stroke: rgba(255, 255, 255, 0.08);
    stroke-width: 8;
}

.page-about .about-ring-progress {
    fill: none;
    stroke: var(--c-gold);
    stroke-width: 8;
    stroke-linecap: round;
    stroke-dasharray: 364.43;
    stroke-dashoffset: 0.073;
    animation: pageAboutRingFill 1.8s ease-out;
}

.page-about .about-ring-value {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.page-about .about-ring-num {
    font-size: 30px;
    font-weight: 900;
    color: var(--c-gold-light);
    font-family: var(--font-heading);
}

.page-about .about-ring-label {
    font-size: 12px;
    color: var(--c-text2);
    margin-top: 4px;
}

.page-about .about-hero-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    margin: 32px 0 0;
    padding: 0;
    width: 100%;
    max-width: 440px;
}

.page-about .about-hero-stat {
    background: var(--c-bg2);
    border: 2px solid var(--c-gold);
    border-radius: var(--radius-sm);
    padding: 14px 16px;
}

.page-about .about-hero-stat dt {
    font-size: 12px;
    letter-spacing: 0.08em;
    color: var(--c-text2);
}

.page-about .about-hero-stat dd {
    margin: 6px 0 0;
    font-size: 24px;
    font-weight: 800;
    color: var(--c-gold);
    font-family: var(--font-heading);
}

@keyframes pageAboutRingFill {
    from { stroke-dashoffset: 364.43; }
    to { stroke-dashoffset: 0.073; }
}

/* ===== 区块头 ===== */
.page-about .section-kicker {
    margin: 0 0 10px;
    color: var(--c-red);
    font-weight: 700;
    font-size: 13px;
    letter-spacing: 0.2em;
}

.page-about .section-head {
    margin-bottom: 36px;
}

.page-about .section-head h2 {
    margin: 0;
    font-family: var(--font-heading);
    font-size: clamp(28px, 4vw, 40px);
    line-height: 1.2;
    color: var(--c-text);
}

.page-about .section-desc {
    color: var(--c-text2);
    margin-top: 12px;
    max-width: 60ch;
}

/* ===== 起源 ===== */
.page-about .about-origin-grid {
    display: grid;
    gap: 28px;
}

.page-about .about-origin-text p {
    color: var(--c-text2);
    line-height: 1.8;
    font-size: 16px;
    margin: 0 0 18px;
}

.page-about .about-origin-text a {
    color: var(--c-cyan);
    text-decoration: none;
    border-bottom: 1px solid rgba(0, 229, 255, 0.4);
}

.page-about .about-origin-text a:hover {
    color: var(--c-gold-light);
    border-bottom-color: var(--c-gold);
}

.page-about .about-origin-quote {
    position: relative;
    padding: 28px 28px 24px 40px;
    background: linear-gradient(135deg, var(--c-bg2), var(--c-bg3));
    border: 2px solid var(--c-gold);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.page-about .about-origin-quote-mark {
    position: absolute;
    left: 14px;
    top: 2px;
    font-size: 60px;
    color: var(--c-gold);
    font-family: serif;
    line-height: 1;
}

.page-about .about-origin-quote blockquote {
    margin: 0;
    font-size: 19px;
    line-height: 1.8;
    color: var(--c-text);
    font-weight: 600;
}

.page-about .about-origin-quote-author {
    margin: 16px 0 0;
    color: var(--c-text2);
    font-size: 13px;
}

/* ===== 时间线 ===== */
.page-about .about-timeline {
    list-style: none;
    margin: 0;
    padding: 0;
    position: relative;
}

.page-about .about-timeline::before {
    content: '';
    position: absolute;
    left: 8px;
    top: 8px;
    bottom: 8px;
    width: 3px;
    background: linear-gradient(180deg, var(--c-gold), var(--c-red));
    opacity: 0.55;
}

.page-about .about-timeline-item {
    position: relative;
    padding-left: 44px;
    margin-bottom: 48px;
}

.page-about .about-timeline-item::before {
    content: '';
    position: absolute;
    left: -1px;
    top: 6px;
    width: 21px;
    height: 21px;
    border-radius: 50%;
    background: var(--c-gold);
    border: 4px solid var(--c-bg);
    box-shadow: 0 0 0 2px var(--c-gold), 0 0 18px rgba(230, 57, 70, 0.6);
    z-index: 1;
}

.page-about .about-timeline-year {
    font-family: var(--font-heading);
    font-size: 42px;
    font-weight: 900;
    line-height: 1;
    color: transparent;
    -webkit-text-stroke: 1.5px var(--c-gold);
    margin-bottom: 10px;
    letter-spacing: -1px;
}

.page-about .about-timeline-card {
    position: relative;
    padding: 24px;
    background: var(--c-bg2);
    border: 2px solid var(--c-gold);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
    overflow: hidden;
}

.page-about .about-timeline-card::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: var(--radius);
    background-image:
        linear-gradient(rgba(0, 229, 255, 0.07) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 229, 255, 0.07) 1px, transparent 1px);
    background-size: 18px 18px;
    opacity: 0;
    transition: opacity var(--transition);
    pointer-events: none;
    z-index: 2;
}

.page-about .about-timeline-item:hover .about-timeline-card {
    transform: translateY(-6px);
    box-shadow: 0 18px 52px rgba(0, 0, 0, 0.65), 0 0 0 1px rgba(212, 175, 55, 0.4);
    border-color: var(--c-gold-light);
}

.page-about .about-timeline-item:hover .about-timeline-card::after {
    opacity: 1;
}

.page-about .about-timeline-card h3 {
    margin: 0 0 10px;
    font-size: 22px;
    font-weight: 700;
    font-family: var(--font-heading);
    color: var(--c-text);
}

.page-about .about-timeline-card p {
    margin: 0 0 10px;
    line-height: 1.75;
    color: var(--c-text2);
}

.page-about .about-timeline-card p:last-child {
    margin-bottom: 0;
}

.page-about .about-timeline-card a {
    color: var(--c-cyan);
    text-decoration: none;
}

.page-about .about-timeline-card a:hover {
    color: var(--c-gold-light);
}

/* details 展开 */
.page-about .about-timeline-card summary {
    cursor: pointer;
    color: var(--c-cyan);
    font-weight: 600;
    margin-top: 12px;
    list-style: none;
    position: relative;
    padding-left: 22px;
    transition: color var(--transition);
    font-size: 14px;
}

.page-about .about-timeline-card summary::-webkit-details-marker {
    display: none;
}

.page-about .about-timeline-card summary::before {
    content: '+';
    position: absolute;
    left: 0;
    top: 0;
    color: var(--c-gold);
    font-weight: 700;
    font-size: 16px;
    line-height: 1;
}

.page-about .about-timeline-card details[open] summary::before {
    content: '−';
}

.page-about .about-timeline-card details p {
    margin: 12px 0 0;
    padding: 4px 0 4px 18px;
    border-left: 2px solid var(--c-gold);
    color: var(--c-text2);
    font-size: 14px;
    line-height: 1.7;
}

/* ===== 图片占位 ===== */
.page-about .img-frame {
    border: 2px solid var(--c-gold);
    border-radius: var(--radius);
    overflow: hidden;
    background: var(--c-bg3);
    padding: 8px;
    margin: 16px 0 0;
    box-shadow: 0 8px 28px rgba(0, 0, 0, 0.45);
}

.page-about .img-frame img {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 8px;
    object-fit: cover;
}

.page-about .img-frame figcaption {
    padding: 10px 4px 2px;
    font-size: 12px;
    color: var(--c-text2);
    text-align: center;
}

/* ===== 记录标准 ===== */
.page-about .about-standards-grid {
    display: grid;
    gap: 28px;
}

.page-about .about-standards-cards {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: 16px;
}

.page-about .about-standard-card {
    position: relative;
    padding: 24px 24px 24px 72px;
    background: var(--c-bg2);
    border: 2px solid var(--c-gold);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transition: border-color var(--transition), transform var(--transition);
}

.page-about .about-standard-card:hover {
    border-color: var(--c-cyan);
    transform: translateY(-4px);
}

.page-about .about-standard-rank {
    position: absolute;
    left: 18px;
    top: 18px;
    font-size: 30px;
    font-weight: 900;
    color: transparent;
    -webkit-text-stroke: 1px var(--c-cyan);
    font-family: var(--font-heading);
}

.page-about .about-standard-card h3 {
    margin: 0 0 8px;
    font-size: 18px;
    font-family: var(--font-heading);
    color: var(--c-text);
}

.page-about .about-standard-card p {
    margin: 0;
    color: var(--c-text2);
    line-height: 1.7;
    font-size: 14px;
}

.page-about .about-standards-media {
    margin: 0;
    align-self: start;
}

/* ===== 团队 ===== */
.page-about .about-team-grid {
    display: grid;
    gap: 28px;
}

.page-about .about-team-copy p {
    color: var(--c-text2);
    line-height: 1.8;
    margin: 0 0 18px;
}

.page-about .about-team-figure {
    margin: 0;
}

.page-about .about-team-roles {
    display: grid;
    gap: 16px;
    margin-top: 28px;
}

.page-about .about-role-card {
    padding: 24px;
    background: linear-gradient(135deg, var(--c-bg2), var(--c-bg3));
    border: 2px solid var(--c-purple);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transition: transform var(--transition), border-color var(--transition);
}

.page-about .about-role-card:hover {
    transform: translateY(-4px);
    border-color: var(--c-gold);
}

.page-about .about-role-num {
    font-size: 64px;
    font-weight: 900;
    color: var(--c-gold);
    line-height: 1;
    font-family: var(--font-heading);
}

.page-about .about-role-card h3 {
    margin: 8px 0 8px;
    font-size: 18px;
    font-family: var(--font-heading);
    color: var(--c-text);
}

.page-about .about-role-card p {
    margin: 0;
    color: var(--c-text2);
    line-height: 1.7;
    font-size: 14px;
}

/* ===== 合规 ===== */
.page-about .about-compliance {
    border-top: 10px solid var(--c-red);
    background:
        linear-gradient(rgba(0, 229, 255, 0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 229, 255, 0.04) 1px, transparent 1px),
        var(--c-bg2);
    background-size: 24px 24px, 24px 24px, auto;
}

.page-about .about-compliance-grid {
    display: grid;
    gap: 24px;
}

.page-about .about-compliance-lead {
    font-size: clamp(18px, 2.2vw, 26px);
    line-height: 1.7;
    font-weight: 600;
    color: var(--c-text);
    margin: 0;
}

.page-about .about-compliance-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: 12px;
}

.page-about .about-compliance-list li {
    padding: 14px 16px 14px 20px;
    background: rgba(0, 229, 255, 0.06);
    border-left: 4px solid var(--c-cyan);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    color: var(--c-text2);
    line-height: 1.6;
    font-size: 15px;
}

.page-about .about-compliance-list a {
    color: var(--c-gold-light);
    text-decoration: none;
    border-bottom: 1px solid rgba(212, 175, 55, 0.3);
}

.page-about .about-compliance-list a:hover {
    color: var(--c-cyan);
    border-bottom-color: var(--c-cyan);
}

/* ===== 底部导航卡片 ===== */
.page-about .about-next-links {
    display: grid;
    gap: 16px;
}

.page-about .about-next-link {
    display: block;
    padding: 28px;
    background: var(--c-bg2);
    border: 2px solid var(--c-gold);
    border-radius: var(--radius);
    color: var(--c-text);
    font-family: var(--font-heading);
    font-weight: 700;
    text-decoration: none;
    transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
}

.page-about .about-next-link span {
    display: block;
    margin-top: 8px;
    font-size: 14px;
    font-weight: 400;
    color: var(--c-text2);
    font-family: var(--font-body);
}

.page-about .about-next-link:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow);
    background: var(--c-bg3);
}

/* ===== 动效与无障碍 ===== */
@media (prefers-reduced-motion: reduce) {
    .page-about .about-ring-progress {
        animation: none;
    }

    .page-about .about-timeline-card,
    .page-about .about-standard-card,
    .page-about .about-role-card,
    .page-about .about-next-link {
        transition: none;
    }
}

/* ===== 桌面端 ===== */
@media (min-width: 900px) {
    .page-about .about-hero {
        padding-top: 64px;
        padding-bottom: 72px;
    }

    .page-about .about-hero-grid {
        display: grid;
        grid-template-columns: 1.15fr 0.85fr;
        gap: 56px;
        align-items: center;
    }

    .page-about .about-hero-meta {
        flex-direction: row;
        align-items: center;
        gap: 24px;
        margin-top: 0;
    }

    .page-about .about-hero-stats {
        margin-top: 0;
        grid-template-columns: 1fr;
    }

    .page-about .about-origin-grid {
        grid-template-columns: 1.3fr 0.7fr;
        gap: 40px;
        align-items: start;
    }

    .page-about .about-timeline-item {
        padding-left: 150px;
    }

    .page-about .about-timeline::before {
        left: 88px;
    }

    .page-about .about-timeline-item::before {
        left: 79px;
    }

    .page-about .about-timeline-year {
        position: absolute;
        left: 0;
        top: 6px;
        font-size: 56px;
        width: 72px;
        text-align: right;
        margin-bottom: 0;
    }

    .page-about .about-standards-grid {
        grid-template-columns: 1.1fr 0.9fr;
        gap: 40px;
    }

    .page-about .about-standards-cards {
        grid-template-columns: repeat(2, 1fr);
    }

    .page-about .about-standards-media {
        position: sticky;
        top: 24px;
    }

    .page-about .about-team-grid {
        grid-template-columns: 1.1fr 0.9fr;
        gap: 36px;
        align-items: center;
    }

    .page-about .about-team-roles {
        grid-template-columns: repeat(3, 1fr);
    }

    .page-about .about-compliance-grid {
        grid-template-columns: 1.2fr 1fr;
        gap: 48px;
    }

    .page-about .about-next-links {
        grid-template-columns: repeat(4, 1fr);
    }
}