/**
 * 关于我们页 — 全球化品牌叙事（增强版）
 * 维护路径：public/css/about.css
 */
@charset "UTF-8";
main.about-page {
    /* 亮色版配色：压灰提亮（仅作用于关于页） */
    --c-bg-soft: #f6f8fb;
    /* 内容区强调色：石板灰（用户不喜欢蓝色，保持中性克制） */
    --c-accent: #334155;
    --c-accent-rgb: 51, 65, 85;
    --c-accent-strong: #1f2937;
    width: 100%;
    max-width: none;
    margin: 0;
    padding-bottom: 0;
    box-sizing: border-box;
    /* 横向裁剪防溢出：地球仪轨道面等 3D 旋转变换的视觉盒会超出视口，
       在 iOS Safari 上撑出横向滚动（内容左切、右侧留白）；
       用 clip 而非 hidden —— clip 不创建滚动容器，楼层内 sticky 吸顶导航不受影响 */
    overflow: hidden;
    overflow-x: clip;
    overflow-y: visible;
}
html:not(.io-dark-mode) main.about-page {
    background: #ffffff;
}
.about-wrap {
    width: 100%;
    max-width: min(100%, 1280px);
    margin-left: auto;
    margin-right: auto;
    box-sizing: border-box;
}
.about-topband {
    padding: 12px 0 10px;
    background: var(--c-bg);
}
html:not(.io-dark-mode) .about-topband {
    background: #ffffff;
}
html:not(.io-dark-mode) .about-topband .breadcrumb-nav a {
    color: #334155;
}
html:not(.io-dark-mode) .about-topband .breadcrumb-nav a:hover {
    color: var(--c-accent);
}
html:not(.io-dark-mode) .about-topband .breadcrumb-nav span:not(.breadcrumb-sep) {
    color: #0f172a;
    font-weight: 600;
}
html:not(.io-dark-mode) .about-topband .breadcrumb-nav .breadcrumb-sep {
    color: #64748b;
}
.about-breadcrumb {
    margin-bottom: 0;
}
/* —— Hero（亮色） —— */
.about-hero {
    position: relative;
    /* 横向裁剪防溢出；纵向放行，底部光晕自然溢出到下一楼层，避免背景被边界硬切 */
    overflow: hidden;
    overflow-x: clip;
    overflow-y: visible;
    padding: clamp(40px, 6vw, 72px) 0 clamp(48px, 6.5vw, 80px);
    color: var(--c-text);
    background: #ffffff;
}
.about-hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    /* 向下延伸 200px，光晕/网格淡出跨过楼层边界，与下方区块拼接 */
    bottom: -200px;
    pointer-events: none;
    background:
    radial-gradient(900px 420px at 85% -10%, rgba(var(--c-accent-rgb), 0.07), transparent 60%),
    radial-gradient(700px 420px at -10% 96%, rgba(37, 99, 235, 0.05), transparent 62%);
}
.about-hero-bg::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image:
    linear-gradient(rgba(15, 23, 42, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(15, 23, 42, 0.02) 1px, transparent 1px);
    background-size: 56px 56px;
    mask-image: radial-gradient(ellipse 90% 70% at 50% 30%, #000 20%, transparent 75%);
    -webkit-mask-image: radial-gradient(ellipse 90% 70% at 50% 30%, #000 20%, transparent 75%);
}
.about-hero-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(70px);
    opacity: 0.35;
    animation: about-orb-float 12s ease-in-out infinite;
}
.about-hero-orb--1 {
    width: 420px;
    height: 420px;
    top: -120px;
    right: 5%;
    background: rgba(var(--c-accent-rgb), 0.16);
}
.about-hero-orb--2 {
    width: 280px;
    height: 280px;
    bottom: 10%;
    left: -5%;
    background: rgba(37, 99, 235, 0.1);
    animation-delay: -4s;
}
.about-hero-orb--3 {
    width: 200px;
    height: 200px;
    top: 40%;
    right: 35%;
    background: rgba(251, 191, 36, 0.12);
    animation-delay: -8s;
}
@keyframes about-orb-float {
    0%, 100% {
        transform: translate(0, 0) scale(1);
    }
    50% {
        transform: translate(12px, -18px) scale(1.05);
    }
}
.about-hero-grid {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: clamp(32px, 5vw, 56px);
    align-items: center;
}
@media (max-width: 991px) {
    .about-hero-grid {
        grid-template-columns: 1fr;
    }
    .about-hero-visual {
        max-width: 400px;
        margin: 0 auto;
    }
}
.about-hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 14px;
    padding: 6px 14px 6px 10px;
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.04em;
    color: var(--c-text-2);
    background: var(--c-bg-card);
    border: 1px solid var(--c-line);
    border-radius: 999px;
}
.about-hero-badge i {
    color: var(--c-accent);
    font-size: 0.875rem;
}
.about-hero-eyebrow {
    margin: 0 0 12px;
    font-size: 0.8125rem;
    font-weight: 500;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--c-text-3);
}
.about-hero-title {
    margin: 0 0 18px;
    font-size: clamp(2.125rem, 5.5vw, 3.25rem);
    font-weight: 700;
    line-height: 1.14;
    letter-spacing: -0.02em;
    color: var(--c-text);
}
.about-hero-title-gradient {
    display: block;
    margin-top: 4px;
    background: linear-gradient(105deg, var(--c-text) 0%, var(--c-accent) 130%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}
/* H1 关键词链接：墨色 + 品牌蓝下划线，hover 变蓝 */
.about-hero-title-link {
    display: inline-block;
    color: var(--c-text);
    text-decoration: underline;
    text-decoration-color: var(--c-accent);
    text-decoration-thickness: 3px;
    text-underline-offset: 8px;
    transition: color 0.2s ease;
}
.about-hero-title-link:hover {
    color: var(--c-accent);
    text-decoration-color: var(--c-accent);
}
.about-hero-lead {
    margin: 0 0 28px;
    max-width: 540px;
    font-size: clamp(0.9375rem, 1.6vw, 1.0625rem);
    line-height: 1.85;
    color: var(--c-text-2);
}
.about-hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 22px;
}
.about-hero-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px 18px;
    margin: 0;
    padding: 0;
    list-style: none;
    font-size: 0.8125rem;
    font-weight: 400;
    color: var(--c-text-2);
}
.about-hero-tags li {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.about-hero-tags i {
    color: #059669;
    font-size: 0.75rem;
}
/* Hero visual cards */
.about-hero-visual {
    position: relative;
    min-height: 320px;
}
/* Hero 产品直达面板 */
.about-hero-panel {
    position: relative;
    padding: 20px 20px 18px;
    background: var(--c-bg-card);
    border: 1px solid var(--c-line);
    border-radius: 20px;
    box-shadow: 0 24px 48px rgba(15, 23, 42, 0.08);
}
.about-hero-panel-head {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 14px;
    padding: 0 2px;
}
.about-hero-panel-title {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--c-text);
}
.about-hero-panel-sub {
    font-size: 0.75rem;
    font-weight: 400;
    color: var(--c-text-3);
    white-space: nowrap;
}
.about-hero-panel-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
    margin: 0;
    padding: 0;
    list-style: none;
}
.about-hero-prod {
    display: flex;
    align-items: center;
    gap: 12px;
    height: 100%;
    padding: 13px 14px;
    background: #ffffff;
    border: 1px solid var(--c-line);
    border-radius: 14px;
    text-decoration: none;
    transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}
.about-hero-prod:hover {
    border-color: rgba(var(--c-accent-rgb), 0.45);
    box-shadow: 0 8px 20px rgba(37, 99, 235, 0.1);
    transform: translateY(-2px);
    text-decoration: none;
}
.about-hero-prod > i {
    flex: 0 0 auto;
    width: 34px;
    height: 34px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.875rem;
    color: var(--c-accent);
    background: rgba(var(--c-accent-rgb), 0.08);
    border-radius: 10px;
}
.about-hero-prod-txt {
    min-width: 0;
}
.about-hero-prod-name {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    line-height: 1.35;
    color: var(--c-text);
}
.about-hero-prod-note {
    display: block;
    margin-top: 2px;
    font-size: 0.6875rem;
    font-weight: 400;
    line-height: 1.45;
    color: var(--c-text-3);
}
.about-hero-card--float {
    position: absolute;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 16px;
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--c-text-2);
    background: rgba(255, 255, 255, 0.95);
    border: 1px solid var(--c-line);
    border-radius: 12px;
    box-shadow: 0 12px 28px rgba(15, 23, 42, 0.1);
    backdrop-filter: blur(10px);
    animation: about-float-badge 5s ease-in-out infinite;
}
.about-hero-card--float i {
    color: var(--c-accent);
}
.about-hero-card--tl {
    top: 8%;
    left: -4%;
    animation-delay: 0s;
}
.about-hero-card--br {
    bottom: 12%;
    right: -2%;
    animation-delay: -2.5s;
}
@keyframes about-float-badge {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-8px);
    }
}
@media (max-width: 575px) {
    .about-hero-card--tl {
        left: 0;
    }
    .about-hero-card--br {
        right: 0;
    }
}
/* Buttons */
.about-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 26px;
    font-size: 0.9375rem;
    font-weight: 700;
    text-decoration: none;
    border-radius: 12px;
    transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease, color 0.2s ease;
}
.about-btn--primary {
    color: #fff;
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 55%, #334155 100%);
    box-shadow: 0 10px 28px rgba(15, 23, 42, 0.28);
}
.about-btn--primary:hover {
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 14px 36px rgba(15, 23, 42, 0.36);
}
.about-btn--ghost {
    color: rgba(255, 255, 255, 0.92);
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.2);
}
.about-btn--ghost:hover {
    color: #fff;
    background: rgba(255, 255, 255, 0.12);
    text-decoration: none;
}
.about-btn--lg {
    padding: 15px 36px;
    font-size: 1rem;
    border-radius: 14px;
}
/* —— Stats —— */
.about-stats-band {
    margin-top: -48px;
    position: relative;
    z-index: 2;
    padding-bottom: clamp(40px, 6vw, 64px);
}
.about-stats-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: clamp(14px, 2vw, 22px);
    margin: 0;
    padding: 0;
    list-style: none;
}
@media (max-width: 767px) {
    .about-stats-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}
.about-stat {
    position: relative;
    padding: clamp(22px, 3vw, 30px) clamp(16px, 2vw, 24px);
    background: var(--c-bg-card);
    border: 1px solid var(--c-line);
    border-radius: 16px;
    box-shadow: var(--s-md);
    overflow: hidden;
    transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}
.about-stat::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--c-accent), #94a3b8);
    opacity: 0;
    transition: opacity 0.25s ease;
}
.about-stat:hover {
    transform: translateY(-6px);
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.1);
    border-color: var(--c-line-strong);
}
.about-stat:hover::before {
    opacity: 1;
}
.about-stat-value {
    display: block;
    margin-bottom: 4px;
    font-size: clamp(1.875rem, 3.5vw, 2.375rem);
    font-weight: 600;
    line-height: 1.1;
    color: var(--c-text);
    letter-spacing: -0.03em;
}
.about-stat-label {
    display: block;
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--c-text-2);
}
/* —— Sections —— */
.about-section {
    padding: 1rem 0;
}
.about-section--soft {
    background: var(--c-bg);
}
html:not(.io-dark-mode) .about-section--soft {
    /* 透明白：根容器已是纯白，视觉不变；放行相邻版块渐变光晕跨界拼接 */
    background: transparent;
}
main.about-page .about-section-kicker {
    margin: 0 0 8px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--c-accent);
}
/* 机房介绍：左文右图整块双栏，右侧装饰面板撑满文本列全高，杜绝下方空洞 */
.about-dc-lead {
    display: grid;
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: clamp(24px, 4vw, 48px);
    align-items: stretch;
    margin-bottom: clamp(28px, 4vw, 44px);
}
.about-dc-lead-text {
    min-width: 0;
}
.about-dc-visual {
    position: relative;
    min-height: 100%;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 18px;
    border: 1px solid rgba(var(--c-accent-rgb), 0.14);
    background:
    linear-gradient(135deg, #eef4ff 0%, #f7fbff 52%, #ffffff 100%);
}
/* 淡蓝网格纹理，只在中部显现，避免抢眼 */
.about-dc-visual::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image:
    linear-gradient(rgba(var(--c-accent-rgb), 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(var(--c-accent-rgb), 0.08) 1px, transparent 1px);
    background-size: 30px 30px;
    mask-image: radial-gradient(ellipse 90% 90% at 50% 45%, #000 25%, transparent 78%);
    -webkit-mask-image: radial-gradient(ellipse 90% 90% at 50% 45%, #000 25%, transparent 78%);
}
/* 右上角柔光晕，呼应全站蓝色强调色 */
.about-dc-visual::after {
    content: "";
    position: absolute;
    right: -70px;
    top: -80px;
    width: 260px;
    height: 260px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(var(--c-accent-rgb), 0.16) 0%, transparent 68%);
    filter: blur(24px);
    pointer-events: none;
}
.about-dc-visual-svg {
    position: relative;
    z-index: 1;
    width: min(82%, 340px);
    height: auto;
    opacity: 0.92;
}
@media (max-width: 991px) {
    .about-dc-lead {
        grid-template-columns: 1fr;
    }
    .about-dc-visual {
        min-height: 220px;
    }
}
/* 版块标题行：中文标题与英文副标同排，基线对齐 */
main.about-page .about-section-head {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 4px 12px;
    margin-bottom: 1.2rem;
}
main.about-page .about-section-head .about-section-title,
main.about-page .about-section-head .about-section-kicker {
    margin: 0;
}
.about-section-title {
    margin: 0 0 10px;
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--c-text);
    letter-spacing: -0.03em;
}
.about-section-title--left {
    text-align: left;
}
.about-section-sub {
    margin: 0;
    max-width: 520px;
    font-size: 1rem;
    line-height: 1.6;
    color: var(--c-text-2);
}
.about-section-lead {
    margin: 0 0 16px;
    font-size: 1.125rem;
    font-weight: 600;
    line-height: 1.65;
    color: var(--c-text);
}
.about-split {
    display: grid;
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    gap: clamp(40px, 6vw, 72px);
    align-items: center;
}
@media (max-width: 991px) {
    .about-split {
        grid-template-columns: 1fr;
    }
}
.about-split-copy p {
    margin: 0 0 14px;
    font-size: 0.9375rem;
    line-height: 1.8;
    color: var(--c-text-2);
}
.about-pill-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 20px 0 0;
    padding: 0;
    list-style: none;
}
.about-pill-list li {
    padding: 8px 14px;
    font-size: 0.8125rem;
    font-weight: 700;
    color: var(--c-text);
    background: var(--c-bg-soft);
    border: 1px solid var(--c-line);
    border-radius: 999px;
}
/* Globe */
.about-globe-card {
    position: relative;
    aspect-ratio: 1;
    max-width: 380px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: center;
}
.about-globe-core {
    position: relative;
    z-index: 1;
    width: 52%;
    height: 52%;
    /* 浅灰地球模型：高光偏左上，边缘压暗营造球体 */
    --earth-hi: #ffffff;
    --earth-lo: #eef2f7;
    --earth-edge: #c9d3df;
    --earth-land: #c3cdd9;
    --earth-line: #b9c4d2;
    display: flex;
    align-items: center;
    justify-content: center;
    background: radial-gradient(circle at 35% 28%, var(--earth-hi) 0%, var(--earth-lo) 45%, var(--earth-edge) 100%);
    border-radius: 50%;
    /* 裁剪球面内容：大陆与节点随自转转到边缘即被球体遮住 */
    overflow: hidden;
    box-shadow:
    0 18px 44px rgba(15, 23, 42, 0.14),
    inset 0 -14px 30px rgba(100, 116, 139, 0.26),
    0 0 0 10px rgba(15, 23, 42, 0.03);
}
.about-earth-art {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    border-radius: 50%;
}
/* 品牌 logo：静置于地球正中，不随球转（大小约为球的 1/30，仅作点缀） */
.about-earth-node {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 3.2%;
    transform: translate(-50%, -50%);
}
.about-earth-node img {
    display: block;
    width: 100%;
    height: auto;
}
/* 香港节点标记：钉在香港地理位置，logo 如旗帜立于其右上方（橙色枢纽色 + CSS 脉冲） */
.about-earth-pin {
    position: absolute;
    left: 57.2%;
    top: 60.4%;
    width: 11px;
    height: 11px;
    transform: translate(-50%, -50%);
    z-index: 2;
}
.about-earth-pin-dot {
    position: absolute;
    inset: 3px;
    border-radius: 50%;
    background: var(--c-action);
    box-shadow: 0 0 0 1.5px #ffffff, 0 1px 4px rgba(15, 23, 42, 0.35);
    transition: transform 0.2s ease;
}
.about-earth-pin:hover .about-earth-pin-dot {
    transform: scale(1.35);
}
.about-earth-pin-pulse {
    position: absolute;
    inset: 0;
    border-radius: 50%;
    background: rgba(234, 88, 12, 0.4);
    animation: about-pin-pulse 2.4s ease-out infinite;
}
@keyframes about-pin-pulse {
    0% {
        transform: scale(0.45);
        opacity: 0.75;
    }
    75% {
        transform: scale(1.9);
        opacity: 0;
    }
    100% {
        transform: scale(1.9);
        opacity: 0;
    }
}
/* 卫星星座：6 条不同半径/倾角的椭圆轨道（--oa 半长轴、--k 压扁比、--w 倾角、--ph 初相、--d 周期外圈更慢）；
   环为压扁圆，球沿同一参数化椭圆运行；orb-anti 反向自转 + orb-fix 反压扁/反倾斜，保证球与名字始终朝上 */
.about-globe-card {
    --orbit-scale: 1.07;
}
.about-globe-dots {
    position: absolute;
    inset: 0;
    /* 关键：地球 core 是 z-index:1，轨道容器必须压在其上（z:2），
       卫星才能"飞到地球前面"；绕后遮挡由 JS mask 挖洞负责 */
    z-index: 2;
    margin: 0;
    padding: 0;
    list-style: none;
}
.about-globe-dots li {
    position: absolute;
    inset: 0;
}
.about-globe-dots .orb-ring {
    position: absolute;
    top: 50%;
    left: 50%;
    width: calc(var(--oa) * 2 * var(--orbit-scale));
    height: calc(var(--oa) * 2 * var(--k) * var(--orbit-scale));
    /* 轨道线：虚线尾迹 + 沿圈渐变（一段可见渐入渐出），随相位错开亮区 */
    border: 1px dashed rgba(148, 163, 184, 0.18);
    border-radius: 50%;
    transform: translate(-50%, -50%) rotate(var(--w)) scaleY(var(--k));
    -webkit-mask-image: conic-gradient(from var(--ph, 0deg), transparent 0deg, #000 85deg, #000 255deg, transparent 359deg);
    mask-image: conic-gradient(from var(--ph, 0deg), transparent 0deg, #000 85deg, #000 255deg, transparent 359deg);
}
.about-globe-dots .orb-plane {
    position: absolute;
    inset: 0;
    transform: rotate(var(--w)) scaleY(var(--k));
}
.about-globe-dots .orb-rotor {
    position: absolute;
    inset: 0;
    will-change: transform;
    animation: about-spin var(--d, 18s) linear infinite;
}
.about-globe-dots .orb-pos {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    transform: rotate(var(--ph, 0deg)) translateY(calc(var(--oa) * var(--orbit-scale) * -1));
}
.about-globe-dots .orb-anti {
    position: absolute;
    display: block;
    width: 0;
    height: 0;
    will-change: transform;
    animation: about-spin-rev var(--d, 18s) linear infinite;
}
/* 反向消除祖先链的全部变换：rotate(-ph) · scaleY(1/k) · rotate(-w)，保证球与名字永远正立 */
.about-globe-dots .orb-fix {
    position: absolute;
    display: block;
    width: 0;
    height: 0;
    transform: rotate(calc(var(--ph, 0deg) * -1)) scaleY(calc(1 / var(--k))) rotate(calc(var(--w) * -1));
}
.about-globe-dots .orb-sat {
    position: absolute;
    top: 0;
    left: 0;
    width: 0;
    height: 0;
    /* 绕到地球远侧：不做整体透明变化（避免叠加出卡顿感），
       遮挡完全交给 JS mask 羽化挖洞（唯一渐变源，最丝滑） */
    transition: opacity 0.55s ease;
}
.about-globe-dots .orb-sat > i {
    position: absolute;
    top: 0;
    left: 0;
    /* 太空脉动：轻微呼吸缩放，各球周期/延迟错峰（--pd/--pdel 内联在 li 上） */
    animation: about-sat-pulse var(--pd, 3.4s) ease-in-out var(--pdel, 0s) infinite;
    will-change: transform;
    transform: translate(-50%, -50%);
    width: 34px;
    height: 34px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    /* 图标再小一档、居中一点点，品牌红点缀（中国卫星 · 香港基点） */
    font-size: 0.65625rem;
    color: #ef1010;
    /* 立体球体：实色底 + 左上高光内阴影 + 右下暗部内阴影 + 落地投影（不用渐变填充） */
    background: #eef2f7;
    border: 0;
    box-shadow:
    inset 3px 3px 6px rgba(255, 255, 255, 0.95),
    inset -4px -5px 9px rgba(148, 163, 184, 0.75),
    inset 0 0 0 1px rgba(148, 163, 184, 0.25),
    0 6px 13px rgba(15, 23, 42, 0.2);
}
.about-globe-dots .orb-tag {
    position: absolute;
    top: 0;
    display: flex;
    align-items: center;
    gap: 4px;
    white-space: nowrap;
    font-size: 0.6875rem;
    line-height: 1;
    font-weight: 400;
    /* 名字弱化：小一号、淡灰，不与球体抢焦点 */
    color: #94a3b8;
    text-decoration: none;
    /* opacity 供换边状态机使用：换边时先淡出、挪位后再淡入，避免瞬移跳变 */
    transition: color 0.2s ease, opacity 0.24s ease;
}
/* 换边中：名字与虚线整体隐藏，位置切换在不可见时完成 */
.about-globe-dots .orb-tag.is-swap {
    opacity: 0;
}
.about-globe-dots .orb-tag:hover {
    color: var(--c-accent);
}
/* 右伸 / 左伸：跟随小球运动，JS 每帧按球所在半边切换 */
.about-globe-dots .orb-tag--r {
    left: 0;
    transform: translate(25px, -50%);
}
.about-globe-dots .orb-tag--l {
    left: 0;
    /* 行内反转：虚线贴球一侧，永远处于球与名字中间 */
    flex-direction: row-reverse;
    transform: translate(calc(-100% - 25px), -50%);
}
.about-globe-dots .orb-line {
    width: 10px;
    /* 虚线同步弱化：更短更淡 */
    border-top: 1px dashed rgba(148, 163, 184, 0.45);
}
/* 卫星绕到地球远侧时的羽化挖洞模板：洞心/半径由 JS 以 --hx/--hy/--hR 注入。
   改为 opacity 模拟遮挡：合成器友好属性，火狐不会触发整页重绘/合成抖动。
   球在远侧且与地球相交时整体变淡（opacity 0.22），视觉上接近"被地球挡住" */
.about-globe-dots .orb-sat > i.is-back,
.about-globe-dots .orb-sat > a.orb-tag.is-back {
    opacity: 0.22;
}
@keyframes about-spin {
    to {
        transform: rotate(360deg);
    }
}
/* 卫星呼吸脉动：幅度克制（±3.5%），保持"一点点"的太空感 */
@keyframes about-sat-pulse {
    0%, 100% {
        transform: translate(-50%, -50%) scale(1);
    }
    50% {
        transform: translate(-50%, -50%) scale(1.07);
    }
}
@keyframes about-spin-rev {
    to {
        transform: rotate(-360deg);
    }
}
@media (max-width: 575px) {
    .about-globe-card {
        --orbit-scale: 0.72;
    }
    .about-globe-core {
        width: 46%;
        height: 46%;
    }
    .about-globe-dots .orb-sat > i {
        width: 30px;
        height: 30px;
        font-size: 0.6875rem;
    }
    .about-globe-dots .orb-tag {
        font-size: 0.5625rem;
        gap: 2px;
    }
    .about-globe-dots .orb-tag--r {
        transform: translate(17px, -50%);
    }
    .about-globe-dots .orb-tag--l {
        transform: translate(calc(-100% - 17px), -50%);
    }
    .about-globe-dots .orb-line {
        width: 7px;
    }
    .about-earth-node {
        width: 3.6%;
    }
}
/* Values */
.about-values-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: clamp(16px, 2.2vw, 24px);
    margin: 0;
    padding: 0;
    list-style: none;
}
@media (max-width: 991px) {
    .about-values-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}
@media (max-width: 575px) {
    .about-values-grid {
        grid-template-columns: 1fr;
    }
}
.about-value-card {
    padding: clamp(24px, 3vw, 32px);
    background: var(--c-bg-card);
    border: 1px solid var(--c-line);
    transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.about-value-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--s-md);
}
.about-value-card h3 {
    display: flex;
    align-items: center;
    gap: 9px;
    margin: 0 0 8px;
    font-size: 1.0625rem;
    font-weight: 600;
    color: var(--c-text);
}
.about-value-card h3 i {
    flex: 0 0 auto;
    font-size: 0.95rem;
    color: #ff0000;
}
.about-value-card p {
    margin: 0;
    font-size: 0.875rem;
    line-height: 1.7;
    color: var(--c-text-2);
}
/* Timeline — horizontal on desktop */
.about-section--timeline {
    background: var(--c-bg);
}
html:not(.io-dark-mode) .about-section--timeline {
    background: #ffffff;
}
.about-timeline {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: clamp(12px, 1.5vw, 20px);
    margin: 0;
    padding: 0;
    list-style: none;
}
@media (max-width: 991px) {
    .about-timeline {
        display: block;
        padding-left: 20px;
        border-left: 2px solid var(--c-line-strong);
    }
}
.about-timeline-item {
    position: relative;
}
@media (min-width: 992px) {
    .about-timeline-item:not(:last-child)::after {
        content: "";
        position: absolute;
        top: 22px;
        right: -10px;
        width: calc(100% - 40px);
        height: 2px;
        margin-left: 40px;
        background: linear-gradient(90deg, var(--c-accent), var(--c-line));
        opacity: 0.35;
        pointer-events: none;
    }
}
@media (max-width: 991px) {
    .about-timeline-item {
        padding: 0 0 28px 24px;
    }
    .about-timeline-item::before {
        content: "";
        position: absolute;
        left: -27px;
        top: 6px;
        width: 12px;
        height: 12px;
        border-radius: 50%;
        background: var(--c-accent);
        box-shadow: 0 0 0 4px var(--c-bg), 0 0 0 6px rgba(var(--c-accent-rgb), 0.2);
    }
    .about-timeline-item--current::before {
        background: linear-gradient(135deg, var(--c-accent), #94a3b8);
        box-shadow: 0 0 0 4px var(--c-bg), 0 0 12px rgba(var(--c-accent-rgb), 0.5);
    }
}
.about-timeline-year {
    display: inline-block;
    margin-bottom: 10px;
    padding: 4px 10px;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    color: var(--c-accent);
    background: rgba(var(--c-accent-rgb), 0.08);
    border-radius: 6px;
}
.about-timeline-item--current .about-timeline-year {
    color: #fff;
    background: linear-gradient(135deg, var(--c-accent), var(--c-accent-strong));
}
.about-timeline-card {
    padding: clamp(16px, 2vw, 20px);
    background: var(--c-bg-card);
    border: 1px solid var(--c-line);
    border-radius: 14px;
    transition: box-shadow 0.25s ease, border-color 0.25s ease;
}
.about-timeline-item:hover .about-timeline-card {
    box-shadow: var(--s-sm);
    border-color: var(--c-line-strong);
}
.about-timeline-item--current .about-timeline-card {
    border-color: rgba(var(--c-accent-rgb), 0.35);
    box-shadow: 0 8px 24px rgba(var(--c-accent-rgb), 0.12);
}
.about-timeline-card h3 {
    margin: 0 0 6px;
    font-size: 1rem;
    font-weight: 600;
    color: var(--c-text);
}
.about-timeline-card p {
    margin: 0;
    font-size: 0.8125rem;
    line-height: 1.65;
    color: var(--c-text-2);
}
/* CTA — 亮色网格化 */
.about-cta {
    padding: 0 0 clamp(64px, 9vw, 100px);
}
.about-cta-grid {
    position: relative;
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: clamp(32px, 5vw, 56px);
    align-items: center;
    background: var(--c-bg-card);
    border: 1px solid var(--c-line);
    border-radius: 24px;
    padding: clamp(40px, 6vw, 56px) clamp(32px, 5vw, 48px);
    box-shadow: var(--s-card);
    overflow: hidden;
}
/* 顶部彩色装饰条 */
.about-cta-grid::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #0f172a 0%, #334155 45%, #94a3b8 75%, #e2e8f0 100%);
    pointer-events: none;
}
/* 左上角装饰 */
.about-cta-grid::after {
    content: "";
    position: absolute;
    top: -60px;
    right: -60px;
    width: 220px;
    height: 220px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(var(--c-accent-rgb), 0.06) 0%, transparent 70%);
    pointer-events: none;
}
.about-cta-copy {
    position: relative;
    z-index: 1;
}
.about-cta-kicker {
    margin: 0 0 10px;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--c-accent);
}
.about-cta-title {
    margin: 0 0 14px;
    font-size: clamp(1.5rem, 3.2vw, 2.125rem);
    font-weight: 600;
    color: var(--c-text);
    letter-spacing: -0.03em;
    line-height: 1.25;
}
.about-cta-lead {
    margin: 0 0 28px;
    font-size: clamp(0.9375rem, 1.4vw, 1.0625rem);
    line-height: 1.7;
    color: var(--c-text-2);
    max-width: 480px;
}
.about-cta-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}
.about-btn--ghost-light {
    color: var(--c-text-2);
    background: var(--c-bg-soft);
    border: 1px solid var(--c-line);
}
.about-btn--ghost-light:hover {
    color: var(--c-text);
    background: var(--c-bg-muted);
    border-color: var(--c-line-strong);
    text-decoration: none;
    transform: translateY(-2px);
    box-shadow: var(--s-sm);
}
/* 右侧亮点网格 */
.about-cta-highlights {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: clamp(12px, 1.8vw, 16px);
}
.about-cta-highlight {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: clamp(14px, 2vw, 18px) clamp(12px, 1.8vw, 16px);
    background: var(--c-bg-soft);
    border: 1px solid var(--c-line);
    border-radius: 14px;
    transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}
.about-cta-highlight:hover {
    transform: translateY(-3px);
    box-shadow: var(--s-md);
    border-color: rgba(var(--c-accent-rgb), 0.25);
}
.about-cta-hl-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    flex-shrink: 0;
    border-radius: 12px;
    background: rgba(var(--c-accent-rgb), 0.1);
    color: var(--c-accent);
    font-size: 1rem;
}
.about-cta-hl-text {
    display: flex;
    flex-direction: column;
    gap: 3px;
    min-width: 0;
}
.about-cta-hl-text strong {
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--c-text);
    line-height: 1.3;
}
.about-cta-hl-text small {
    font-size: 0.75rem;
    color: var(--c-text-3);
    line-height: 1.4;
}
/* 响应式 */
@media (max-width: 991px) {
    .about-cta-grid {
        grid-template-columns: 1fr;
        gap: clamp(28px, 4vw, 40px);
    }
    .about-cta-highlights {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}
@media (max-width: 575px) {
    .about-cta-grid {
        padding: clamp(28px, 5vw, 36px) clamp(16px, 3vw, 24px);
        border-radius: 18px;
    }
    .about-cta-highlights {
        grid-template-columns: 1fr;
        gap: 10px;
    }
    .about-cta-actions {
        flex-direction: column;
        align-items: stretch;
    }
    .about-cta-actions .about-btn {
        justify-content: center;
    }
}
/* —— 机房介绍 Datacenter —— */
.about-dc-intro {
    max-width: 880px;
    margin: 0 0 clamp(28px, 4vw, 44px);
}
.about-dc-intro p {
    margin: 0 0 14px;
    font-size: 0.9375rem;
    line-height: 1.9;
    color: var(--c-text-2);
}
.about-dc-intro p:last-child {
    margin-bottom: 0;
}
.about-inline-link {
    text-decoration: none;
    border-bottom: 1px dashed rgba(var(--c-accent-rgb), 0.45);
    transition: border-color 0.2s ease, color 0.2s ease;
}
.about-inline-link:hover {
    color: var(--c-text);
    border-bottom-color: var(--c-text);
}
.about-dc-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: clamp(16px, 2.2vw, 24px);
    margin: 0;
    padding: 0;
    list-style: none;
}
@media (max-width: 991px) {
    .about-dc-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}
@media (max-width: 575px) {
    .about-dc-grid {
        grid-template-columns: 1fr;
    }
}
.about-dc-card {
    padding:20px 15px;
    background: var(--c-bg-card);
    border: 1px solid var(--c-line);
    border-radius: 16px;
    transition: transform 0.28s ease, box-shadow 0.28s ease;
}
.about-dc-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 20px 44px rgba(0, 0, 0, 0.08);
}
.about-dc-card h3 {
    margin: 0 0 8px;
    font-size: 1.0625rem;
    font-weight: 600;
    color: var(--c-text);
}
.about-dc-card p {
    margin: 0;
    font-size: 0.875rem;
    line-height: 1.7;
    color: var(--c-text-2);
}
/* —— 吸顶锚点导航（副首页菜单） —— */
.about-anchor-nav {
    position: sticky;
    top: var(--header-h, 60px);
    z-index: 40;
    background: rgba(255, 255, 255, 0.88);
    border-bottom: 1px solid var(--c-line);
    -webkit-backdrop-filter: blur(12px);
    backdrop-filter: blur(12px);
}
html.io-dark-mode .about-anchor-nav {
    background: rgba(9, 14, 24, 0.88);
    border-bottom-color: rgba(255, 255, 255, 0.08);
}
.about-anchor-nav-inner {
    display: flex;
    gap: 2px;
    overflow-x: auto;
    scrollbar-width: none;
}
.about-anchor-nav-inner::-webkit-scrollbar {
    display: none;
}
.about-anchor-link {
    flex: 0 0 auto;
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 12px 16px 10px;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--c-text-2);
    text-decoration: none;
    border-bottom: 2px solid transparent;
    white-space: nowrap;
    transition: color 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
}
.about-anchor-link i {
    font-size: 0.8125rem;
    color: var(--c-text-3);
    transition: color 0.2s ease;
}
.about-anchor-link:hover {
    color: var(--c-text);
    background: rgba(var(--c-accent-rgb), 0.04);
    text-decoration: none;
}
.about-anchor-link.is-active {
    color: var(--c-accent);
    border-bottom-color: var(--c-accent);
    background: rgba(var(--c-accent-rgb), 0.05);
}
.about-anchor-link.is-active i {
    color: var(--c-accent);
}
/* 锚点定位留出吸顶双导航高度 */
.about-stats-band,
.about-section,
.about-map-band {
    scroll-margin-top: calc(var(--header-h, 60px) + 58px);
}
/* —— 全球节点地图（亮色 · 扇形扩散轮播） —— */
.about-map-band {
    position: relative;
    /* 横向裁剪防溢出；纵向放行，渐变光晕可自然溢出相邻版块实现跨界拼接（不再被边界硬切） */
    overflow: hidden;
    overflow-x: clip;
    overflow-y: visible;
    background: #ffffff;
}
.about-map-bg {
    position: absolute;
    inset: 0;
    pointer-events: none;
}
.about-map-glow {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.45;
}
.about-map-glow--1 {
    width: 520px;
    height: 520px;
    top: -180px;
    left: -120px;
    background: rgba(37, 99, 235, 0.07);
}
.about-map-glow--2 {
    width: 460px;
    height: 460px;
    bottom: -200px;
    right: -80px;
    background: rgba(var(--c-accent-rgb), 0.06);
}
.about-map-wrap {
    position: relative;
    z-index: 1;
}
.about-map-stage {
    position: relative;
    margin: 0 auto;
}
.about-world-map {
    display: block;
    width: 100%;
    height: auto;
}
.about-map-land {
    fill: #d9e2ee;
    stroke: #ffffff;
    stroke-width: 1.2;
    stroke-linejoin: round;
}
.about-map-lead {
    stroke: #cbd5e1;
    stroke-width: 1;
    stroke-dasharray: 3 3;
    stroke-linecap: round;
}
.about-map-pt {
    cursor: pointer;
    outline: none;
}
.about-map-ring {
    fill: none;
    stroke: rgba(37, 99, 235, 0.8);
    stroke-width: 2.2;
    transform-box: fill-box;
    transform-origin: center;
    opacity: 0.85;
    animation: about-ring-pulse 2s linear infinite;
}
.about-map-ring.ring-2 {
    animation-delay: -1s;
}
.about-map-pt.is-hub .about-map-ring {
    stroke: rgba(var(--c-action-rgb), 0.9);
    stroke-width: 2.6;
}
@keyframes about-ring-pulse {
    0% {
        transform: scale(0.5);
        opacity: 0.85;
    }
    100% {
        transform: scale(2.9);
        opacity: 0;
    }
}
@media (prefers-reduced-motion: reduce) {
    .about-map-ring {
        animation: none;
        opacity: 0;
    }
}
.about-map-node {
    fill: #334155;
    transition: fill 0.2s ease;
}
.about-map-pt.is-hub .about-map-node {
    fill: var(--c-action);
}
.about-map-pt:hover .about-map-node,
.about-map-pt:focus-visible .about-map-node {
    fill: var(--c-text);
}
.about-map-tip {
    fill: #334155;
    font-size: 12px;
    font-weight: 500;
    paint-order: stroke;
    stroke: #ffffff;
    stroke-width: 3px;
    stroke-linejoin: round;
    pointer-events: none;
}
.about-map-hit {
    fill: transparent;
}
.about-map-fan {
    fill: none;
    stroke: url(#aboutRouteGrad);
    stroke-width: 1.4;
    stroke-linecap: round;
    stroke-dasharray: 1;
    stroke-dashoffset: 1;
    animation: about-fan-draw 1.5s cubic-bezier(0.25, 0.7, 0.3, 1) forwards;
}
@keyframes about-fan-draw {
    to {
        stroke-dashoffset: 0;
    }
}
.about-map-hubtag {
    position: absolute;
    z-index: 5;
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 7px 12px;
    background: rgba(255, 255, 255, 0.95);
    border: 1px solid var(--c-line);
    border-radius: 10px;
    box-shadow: 0 10px 26px rgba(15, 23, 42, 0.1);
    font-size: 0.78rem;
    color: var(--c-text-2);
    pointer-events: none;
    white-space: nowrap;
}
.about-map-hubtag i {
    color: var(--c-action);
    font-size: 0.7rem;
}
.about-map-hubtag b {
    color: var(--c-text);
    font-weight: 600;
}
.about-map-links {
    display: flex;
    flex-wrap: wrap;
    gap: 10px 12px;
    margin-top: clamp(24px, 3.5vw, 36px);
}
.about-map-links a {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 15px;
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--c-text-2);
    text-decoration: none;
    background: var(--c-bg-card);
    border: 1px solid var(--c-line);
    border-radius: 999px;
    transition: color 0.22s ease, border-color 0.22s ease, background 0.22s ease;
}
.about-map-links a:hover {
    color: var(--c-accent);
    text-decoration: none;
    border-color: rgba(var(--c-accent-rgb), 0.45);
    background: rgba(var(--c-accent-rgb), 0.04);
}
.about-map-link-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: #334155;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}
.about-map-note {
    margin: 16px 0 0;
    text-align: left;
    font-size: 0.78rem;
    color: var(--c-text-3);
}
/* —— 促销专题 · 热销榜（静态占位，后续接后台数据） —— */
.about-hot-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: clamp(16px, 2.2vw, 24px);
    margin: 0;
    padding: 0;
    list-style: none;
}
@media (max-width: 1099px) {
    .about-hot-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}
@media (max-width: 640px) {
    .about-hot-grid {
        grid-template-columns: 1fr;
    }
}
.about-hot-card {
    position: relative;
    display: flex;
    flex-direction: column;
    padding: clamp(22px, 2.6vw, 28px);
    background: var(--c-bg-card);
    border: 1px solid var(--c-line);
    border-radius: 18px;
    overflow: hidden;
    transition: transform 0.28s ease, box-shadow 0.28s ease, border-color 0.28s ease;
}
.about-hot-card--top::before {
    content: "";
    position: absolute;
    inset: 0 0 auto;
    height: 3px;
    background: linear-gradient(90deg, var(--c-accent), #94a3b8);
}
.about-hot-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 22px 48px rgba(0, 0, 0, 0.09);
    border-color: rgba(var(--c-accent-rgb), 0.4);
}
.about-hot-card--top {
    border-color: rgba(var(--c-accent-rgb), 0.45);
    box-shadow: 0 14px 36px rgba(var(--c-accent-rgb), 0.12);
}
.about-hot-rank {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    align-self: flex-start;
    margin-bottom: 14px;
    padding: 4px 11px;
    font-size: 0.6875rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    color: #f97316;
    background: rgba(249, 115, 22, 0.1);
    border: 1px solid rgba(249, 115, 22, 0.3);
    border-radius: 999px;
}
.about-hot-rank--2 {
    color: #475569;
    background: rgba(71, 85, 105, 0.08);
    border-color: rgba(71, 85, 105, 0.26);
}
.about-hot-rank--3 {
    color: #475569;
    background: rgba(71, 85, 105, 0.08);
    border-color: rgba(71, 85, 105, 0.26);
}
.about-hot-rank--4 {
    color: #475569;
    background: rgba(71, 85, 105, 0.08);
    border-color: rgba(71, 85, 105, 0.26);
}
.about-hot-name {
    margin: 0 0 14px;
    font-size: 1.0625rem;
    font-weight: 600;
    color: var(--c-text);
}
.about-hot-specs {
    display: grid;
    gap: 8px;
    margin: 0 0 18px;
    padding: 0;
    list-style: none;
}
.about-hot-specs li {
    display: flex;
    gap: 8px;
    font-size: 0.8125rem;
    line-height: 1.5;
    color: var(--c-text-2);
}
.about-hot-specs i {
    flex: 0 0 auto;
    width: 14px;
    margin-top: 3px;
    font-size: 0.71875rem;
    text-align: center;
    color: var(--c-accent);
}
.about-hot-price {
    display: flex;
    align-items: baseline;
    gap: 10px;
    margin-top: auto;
    padding-top: 14px;
    border-top: 1px dashed var(--c-line);
}
.about-hot-price-now {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--c-accent);
}
.about-hot-price-now small {
    margin-right: 2px;
    font-size: 0.875rem;
    font-weight: 600;
}
.about-hot-price-now i {
    margin-left: 2px;
    font-size: 0.8125rem;
    font-style: normal;
    font-weight: 700;
    color: var(--c-text-3);
}
.about-hot-price-old {
    font-size: 0.8125rem;
    color: var(--c-text-3);
}
.about-hot-actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px;
    margin-top: 16px;
}
.about-hot-tag {
    font-size: 0.6875rem;
    font-weight: 600;
    color: var(--c-text-3);
}
/* —— 全球合作伙伴 —— */
.about-partner-band {
    margin-top: clamp(32px, 4.5vw, 52px);
    padding: clamp(26px, 3.4vw, 40px);
    background: var(--c-bg-card);
    border: 1px solid var(--c-line);
    border-radius: 22px;
}
.about-partner-head {
    margin-bottom: 22px;
}
.about-partner-title {
    display: inline-flex;
    align-items: center;
    gap: 9px;
    margin: 0 0 6px;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--c-text);
}
.about-partner-title i {
    color: var(--c-accent);
}
.about-partner-sub {
    margin: 0;
    font-size: 0.875rem;
    color: var(--c-text-2);
}
.about-partner-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: clamp(12px, 1.8vw, 18px);
    margin: 0;
    padding: 0;
    list-style: none;
}
@media (max-width: 991px) {
    .about-partner-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}
@media (max-width: 575px) {
    .about-partner-grid {
        grid-template-columns: 1fr;
    }
}
.about-partner-card {
    display: flex;
    align-items: center;
    gap: 12px;
    height: 100%;
    padding: 16px 18px;
    background: var(--c-bg-card);
    border: 1px solid var(--c-line);
    border-radius: 14px;
    text-decoration: none;
    transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}
.about-partner-card:hover {
    transform: translateY(-4px);
    text-decoration: none;
    border-color: rgba(var(--c-accent-rgb), 0.4);
    box-shadow: 0 14px 32px rgba(0, 0, 0, 0.07);
}
.about-partner-card i.fa-arrow-right {
    margin-left: auto;
    flex: 0 0 auto;
    font-size: 0.71875rem;
    color: var(--c-accent);
    transition: transform 0.25s ease;
}
.about-partner-card:hover i.fa-arrow-right {
    transform: translateX(4px);
}
.about-partner-logo {
    flex: 0 0 auto;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    font-size: 0.8125rem;
    font-weight: 700;
    letter-spacing: 0.02em;
    color: #fff;
    background: linear-gradient(135deg, #0f172a, #334155);
    border-radius: 12px;
}
.about-partner-info {
    display: flex;
    flex-direction: column;
    gap: 2px;
    min-width: 0;
}
.about-partner-info strong {
    font-size: 0.9375rem;
    color: var(--c-text);
    white-space: nowrap;
}
.about-partner-info small {
    font-size: 0.71875rem;
    color: var(--c-text-3);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.about-partner-card--flat {
    cursor: default;
}
.about-partner-card--flat:hover {
    transform: none;
    box-shadow: none;
    border-color: var(--c-line);
}
/* —— 站点服务（副首页功能性导航） —— */
.about-svc-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: clamp(14px, 2vw, 22px);
    margin: 0;
    padding: 0;
    list-style: none;
}
@media (max-width: 1099px) {
    .about-svc-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}
@media (max-width: 640px) {
    .about-svc-grid {
        grid-template-columns: 1fr;
    }
}
.about-svc-card {
    position: relative;
    display: flex;
    flex-direction: column;
    height: 100%;
    padding: clamp(20px, 2.4vw, 26px);
    background: var(--c-bg-card);
    border: 1px solid var(--c-line);
    border-radius: 16px;
    text-decoration: none;
    transition: transform 0.26s ease, box-shadow 0.26s ease, border-color 0.26s ease;
}
.about-svc-card:hover {
    transform: translateY(-5px);
    text-decoration: none;
    box-shadow: 0 18px 40px rgba(0, 0, 0, 0.08);
    border-color: rgba(var(--c-accent-rgb), 0.38);
}
.about-svc-name {
    display: block;
    margin-bottom: 7px;
    font-size: 1rem;
    color: var(--c-text);
}
.about-svc-card p {
    margin: 0 0 14px;
    font-size: 0.8125rem;
    line-height: 1.65;
    color: var(--c-text-2);
}
.about-svc-more {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-top: auto;
    font-size: 0.75rem;
    color: #bbbdc2
}
.about-svc-more i {
    transition: transform 0.25s ease;
}
.about-svc-card:hover .about-svc-more i {
    transform: translateX(4px);
}
.about-legal-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-end;
    align-items: center;
    gap: 10px 0;
    margin-top: 1.4rem;
    padding-top: 1.1rem;
    position: relative;
}
.about-legal-links::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent 0%, var(--c-line) 22%, var(--c-line) 78%, transparent 100%);
    opacity: 0.85;
}
.about-legal-links a {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.8rem;
    color: var(--c-text-2);
    text-decoration: none;
    transition: color 0.2s ease;
}
.about-legal-links a + a {
    margin-left: 16px;
}
.about-legal-links a + a::before {
    content: '•';
    margin-right: 16px;
    color: var(--c-line);
    opacity: 0.55;
    font-size: 0.72rem;
}
.about-legal-links a i {
    font-size: 0.7rem;
    color: var(--c-accent);
}
.about-legal-links a:hover {
    color: var(--c-accent);
    text-decoration: none;
}
/* —— 卡片入场动效 —— */
.js-reveal {
    opacity: 0;
    transform: translateY(18px);
    transition: opacity 0.5s ease, transform 0.5s cubic-bezier(0.22, 1, 0.36, 1);
}
.js-reveal.is-in {
    opacity: 1;
    transform: none;
}
/* Dark theme */
html.io-dark-mode .about-stat,
html.io-dark-mode .about-hot-card,
html.io-dark-mode .about-svc-card,
html.io-dark-mode .about-partner-band,
html.io-dark-mode .about-dc-card,
html.io-dark-mode .about-value-card,
html.io-dark-mode .about-timeline-card {
    background: var(--c-bg-card);
}
html.io-dark-mode .about-globe-core {
    --earth-hi: #475569;
    --earth-lo: #293548;
    --earth-edge: #1e293b;
    --earth-land: #3f4c5f;
    --earth-line: #55637a;
    box-shadow:
    0 18px 44px rgba(2, 6, 23, 0.5),
    inset 0 -14px 30px rgba(2, 6, 23, 0.45),
    0 0 0 10px rgba(148, 163, 184, 0.06);
}
html.io-dark-mode .about-globe-dots .orb-sat > i {
    /* 深灰球面上品牌红稍亮一档，保持"一点点红"的辨识度 */
    color: #f56b6b;
    background: #334155;
    box-shadow:
    inset 3px 3px 6px rgba(203, 213, 225, 0.5),
    inset -4px -5px 9px rgba(2, 6, 23, 0.8),
    inset 0 0 0 1px rgba(71, 85, 105, 0.6),
    0 6px 13px rgba(2, 6, 23, 0.6);
}
html.io-dark-mode .about-pill-list li {
    background: var(--c-bg-soft);
}
html.io-dark-mode .about-cta-grid {
    background: var(--c-bg-card);
    border-color: var(--c-line);
}
html.io-dark-mode .about-cta-highlight {
    background: var(--c-bg-soft);
    border-color: var(--c-line);
}
html.io-dark-mode .about-cta-hl-icon {
    background: rgba(var(--c-accent-rgb), 0.16);
}
html.io-dark-mode .about-btn--ghost-light {
    background: var(--c-bg-soft);
    border-color: var(--c-line);
    color: var(--c-text-2);
}
html.io-dark-mode .about-btn--ghost-light:hover {
    background: var(--c-bg-muted);
    border-color: var(--c-line-strong);
    color: var(--c-text);
}
/* —— 深色模式补充适配（页面变量与新增组件；浅色设计保持不变） —— */
html.io-dark-mode main.about-page {
    --c-bg-soft: #101c2e;
    /* 深色下强调蓝提亮一档，保证文字/图标对比度 */
    --c-accent: #94a3b8;
    --c-accent-rgb: 96, 165, 250;
    --c-accent-strong: #cbd5e1;
}
/* Hero：白底改透明，光晕/网格换暗色基调 */
html.io-dark-mode .about-hero {
    background: transparent;
}
html.io-dark-mode .about-hero-bg {
    background:
    radial-gradient(900px 420px at 85% -10%, rgba(96, 165, 250, 0.12), transparent 60%),
    radial-gradient(700px 420px at -10% 96%, rgba(96, 165, 250, 0.08), transparent 62%);
}
html.io-dark-mode .about-hero-bg::before {
    background-image:
    linear-gradient(rgba(148, 163, 184, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148, 163, 184, 0.05) 1px, transparent 1px);
}
html.io-dark-mode .about-hero-orb {
    opacity: 0.22;
}
html.io-dark-mode .about-hero-prod {
    background: var(--c-bg-card);
}
html.io-dark-mode .about-hero-card--float {
    background: rgba(30, 52, 84, 0.95);
}
/* 机房装饰面板：淡蓝渐变改深夜蓝 */
html.io-dark-mode .about-dc-visual {
    border-color: rgba(96, 165, 250, 0.22);
    background:
    linear-gradient(135deg, #152943 0%, #101c2e 52%, #0d1626 100%);
}
/* 香港节点橙色标记：白描边改深底描边 */
html.io-dark-mode .about-earth-pin-dot {
    box-shadow: 0 0 0 1.5px #0b1220, 0 1px 4px rgba(0, 0, 0, 0.5);
}
/* 时间线"当前"年份：变量提亮后改回深蓝渐变，保住白字对比度 */
html.io-dark-mode .about-timeline-item--current .about-timeline-year {
    background: linear-gradient(135deg, #334155, #1f2937);
}
/* 全球节点地图：白底改透明，陆地/文字/标签/引导线深色化 */
html.io-dark-mode .about-map-band {
    background: transparent;
}
html.io-dark-mode .about-map-land {
    fill: #1e3454;
    stroke: rgba(185, 203, 226, 0.22);
}
html.io-dark-mode .about-map-tip {
    fill: #f1f5f9;
    stroke: #0b1220;
}
html.io-dark-mode .about-map-hubtag {
    background: rgba(26, 46, 71, 0.92);
}
html.io-dark-mode .about-map-lead {
    stroke: rgba(185, 203, 226, 0.35);
}
html.io-dark-mode .about-map-node {
    fill: #94a3b8;
}
html.io-dark-mode .about-map-glow {
    opacity: 0.25;
}
/* 热销榜 2-4 名徽章：暗色可读版 */
html.io-dark-mode .about-hot-rank--2,
html.io-dark-mode .about-hot-rank--3,
html.io-dark-mode .about-hot-rank--4 {
    color: #8fa5c1;
    background: rgba(143, 165, 193, 0.12);
    border-color: rgba(143, 165, 193, 0.3);
}
/* 合作伙伴 logo 块：深墨渐变在深色卡片上无边界，改品牌蓝 */
html.io-dark-mode .about-partner-logo {
    background: linear-gradient(135deg, #334155, #1f2937);
}
/* ≥1600px 锚点导航转为固定侧栏时的白底 */
@media (min-width: 1600px) {
    html.io-dark-mode .about-anchor-nav {
        background: #101c2e;
    }
}
/* Respect reduced motion（注意：轨道/地球自转等核心装饰动画不在此降级，业主要求始终播放） */
@media (prefers-reduced-motion: reduce) {
    .about-hero-orb,
    .about-hero-card--float,
    .about-map-route,
    .about-map-node-halo,
    .about-earth-pin-pulse {
        animation: none;
    }
    .about-earth-pin-pulse {
        opacity: 0;
    }
    .js-reveal {
        opacity: 1;
        transform: none;
        transition: none;
    }
}
/* ============================================================
   注册模态窗口 — about 页面 CTA 内嵌
   ============================================================ */
/* 遮罩层 */
.reg-modal-overlay {
    position: fixed;
    inset: 0;
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 16px;
    background: rgba(15, 23, 42, 0.55);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    opacity: 0;
    visibility: hidden;
    transition: opacity .28s ease, visibility .28s ease;
}
.reg-modal-overlay.is-open {
    opacity: 1;
    visibility: visible;
}
/* 模态卡片 */
.reg-modal {
    position: relative;
    width: 100%;
    max-width: 460px;
    max-height: 90vh;
    overflow-y: auto;
    background: var(--c-bg-card);
    border: 1px solid var(--c-line);
    border-radius: 20px;
    box-shadow:
    0 24px 64px rgba(0, 0, 0, .18),
    0 0 0 1px rgba(255, 255, 255, .06) inset;
    transform: scale(.94) translateY(16px);
    opacity: 0;
    transition: transform .32s cubic-bezier(.22, 1, .36, 1), opacity .28s ease;
    overscroll-behavior: contain;
}
.reg-modal-overlay.is-open .reg-modal {
    transform: scale(1) translateY(0);
    opacity: 1;
}
/* 关闭按钮 */
.reg-modal__close {
    position: absolute;
    top: 14px;
    right: 14px;
    z-index: 2;
    width: 34px;
    height: 34px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    border-radius: 10px;
    background: var(--c-bg-soft);
    color: var(--c-text-3);
    font-size: .85rem;
    cursor: pointer;
    transition: background .2s ease, color .2s ease, transform .18s ease;
}
.reg-modal__close:hover {
    background: rgba(239, 68, 68, .1);
    color: #ef4444;
    transform: rotate(90deg);
}
/* 头部 */
.reg-modal__header {
    text-align: center;
    padding: 36px 32px 22px;
    background: linear-gradient(180deg, var(--c-action-soft) 0%, var(--c-bg-card) 100%);
    border-bottom: 1px solid var(--c-line);
    border-radius: 20px 20px 0 0;
}
.reg-modal__icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--c-action) 0%, var(--c-action-hover) 100%);
    color: #fff;
    font-size: 1.5rem;
    margin-bottom: 12px;
    box-shadow: 0 4px 16px rgba(var(--c-action-rgb), .3);
}
.reg-modal__title {
    margin: 0 0 5px;
    font-size: 1.35rem;
    font-weight: 600;
    color: var(--c-text);
    letter-spacing: -.02em;
}
.reg-modal__subtitle {
    margin: 0;
    font-size: .85rem;
    color: var(--c-text-3);
}
/* 表单区域 */
.reg-modal__body {
    padding: 24px 32px 8px;
}
/* 表单组 */
.reg-modal__group {
    margin-bottom: 18px;
}
.reg-modal__label {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: .85rem;
    font-weight: 600;
    color: var(--c-text-2);
    margin-bottom: 6px;
}
.reg-modal__label i {
    color: var(--c-text-3);
    font-size: .78rem;
    width: 16px;
    text-align: center;
}
.reg-modal__input {
    display: block;
    width: 100%;
    padding: 11px 14px;
    font-size: .9rem;
    font-family: inherit;
    color: var(--c-text);
    background: var(--c-bg);
    border: 1.5px solid var(--c-line);
    border-radius: 10px;
    outline: none;
    transition: border-color .2s ease, box-shadow .2s ease;
    box-sizing: border-box;
}
.reg-modal__input:focus {
    border-color: var(--c-action);
    box-shadow: 0 0 0 3px var(--c-action-soft);
}
.reg-modal__input::placeholder {
    color: var(--c-text-3);
    opacity: .6;
}
.reg-modal__input.is-error {
    border-color: #ef4444;
    box-shadow: 0 0 0 3px rgba(239, 68, 68, .12);
}
/* 密码框 */
.reg-modal__pwd-wrap {
    position: relative;
}
.reg-modal__pwd-wrap .reg-modal__input {
    padding-right: 44px;
}
.reg-modal__pwd-toggle {
    position: absolute;
    right: 2px;
    top: 50%;
    transform: translateY(-50%);
    width: 36px;
    height: 36px;
    border: none;
    border-radius: 8px;
    background: transparent;
    color: var(--c-text-3);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: .88rem;
    transition: color .18s ease, background .18s ease;
}
.reg-modal__pwd-toggle:hover {
    color: var(--c-text);
    background: var(--c-bg-soft);
}
/* 提示文字 */
.reg-modal__hint {
    display: block;
    font-size: .75rem;
    color: var(--c-text-3);
    margin-top: 4px;
}
/* 错误提示 */
.reg-modal__error {
    display: none;
    margin: 12px 0 0;
    padding: 10px 14px;
    border-radius: 10px;
    background: #fef2f2;
    border: 1px solid #fecaca;
    color: #dc2626;
    font-size: .84rem;
    line-height: 1.5;
    align-items: center;
    gap: 8px;
}
.reg-modal__error.is-visible {
    display: flex;
}
/* 成功提示 */
.reg-modal__success {
    display: none;
    margin: 12px 0 0;
    padding: 14px 18px;
    border-radius: 10px;
    background: #f0fdf4;
    border: 1px solid #bbf7d0;
    color: #16a34a;
    font-size: .88rem;
    align-items: center;
    gap: 10px;
}
.reg-modal__success.is-visible {
    display: flex;
}
.reg-modal__success i {
    font-size: 1.4rem;
    flex-shrink: 0;
}
.reg-modal__success strong {
    display: block;
    font-size: .92rem;
    margin-bottom: 2px;
}
/* 注册须知 */
.reg-modal__notice {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    padding: 11px 13px;
    border-radius: 10px;
    background: var(--c-primary-soft);
    border: 1px solid var(--c-line);
    font-size: .76rem;
    color: var(--c-text-2);
    line-height: 1.55;
    margin-bottom: 20px;
}
.reg-modal__notice i {
    color: var(--c-text-3);
    font-size: .82rem;
    flex-shrink: 0;
    margin-top: 1px;
}
/* 提交按钮 */
.reg-modal__submit {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    padding: 13px 20px;
    border: none;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--c-action) 0%, var(--c-action-hover) 100%);
    color: #fff;
    font-size: .93rem;
    font-weight: 700;
    font-family: inherit;
    cursor: pointer;
    transition: opacity .2s ease, transform .2s ease, box-shadow .2s ease;
    box-shadow: 0 3px 10px rgba(var(--c-action-rgb), .28);
}
.reg-modal__submit:hover {
    opacity: .92;
    transform: translateY(-1px);
    box-shadow: 0 5px 16px rgba(var(--c-action-rgb), .38);
}
.reg-modal__submit:active {
    transform: translateY(0);
}
.reg-modal__submit:disabled {
    opacity: .6;
    cursor: not-allowed;
    transform: none;
}
/* 底部 */
.reg-modal__footer {
    text-align: center;
    padding: 14px 32px 24px;
    font-size: .86rem;
    color: var(--c-text-3);
    border-top: 1px solid var(--c-line);
    margin-top: 6px;
}
.reg-modal__login-link {
    color: var(--c-action);
    font-weight: 700;
    cursor: pointer;
    text-decoration: none;
    transition: color .2s ease;
}
.reg-modal__login-link:hover {
    color: var(--c-action-hover);
    text-decoration: underline;
}
/* ===== 响应式 ===== */
@media (max-width: 575px) {
    .reg-modal {
        max-width: 100%;
        max-height: 95vh;
        border-radius: 16px;
    }
    .reg-modal__header {
        padding: 28px 20px 18px;
        border-radius: 16px 16px 0 0;
    }
    .reg-modal__icon {
        width: 52px;
        height: 52px;
        font-size: 1.3rem;
    }
    .reg-modal__title {
        font-size: 1.2rem;
    }
    .reg-modal__body {
        padding: 20px 18px 4px;
    }
    .reg-modal__footer {
        padding: 12px 18px 20px;
    }
    .reg-modal__error,
    .reg-modal__success {
        margin-left: 0;
        margin-right: 0;
    }
}
/* ===== 暗色模式 ===== */
html.io-dark-mode .reg-modal-overlay {
    background: rgba(0, 0, 0, .65);
}
html.io-dark-mode .reg-modal {
    background: var(--c-bg-card);
    border-color: var(--c-line);
    box-shadow:
    0 24px 64px rgba(0, 0, 0, .45),
    0 0 0 1px rgba(255, 255, 255, .04) inset;
}
html.io-dark-mode .reg-modal__header {
    background: linear-gradient(180deg, rgba(var(--c-action-rgb), .1) 0%, var(--c-bg-card) 100%);
}
html.io-dark-mode .reg-modal__close {
    background: rgba(255, 255, 255, .06);
}
html.io-dark-mode .reg-modal__close:hover {
    background: rgba(239, 68, 68, .15);
}
html.io-dark-mode .reg-modal__input {
    background: var(--c-bg-soft);
    border-color: var(--c-line);
    color: var(--c-text);
}
html.io-dark-mode .reg-modal__error {
    background: rgba(220, 38, 38, .1);
    border-color: rgba(220, 38, 38, .25);
    color: #fca5a5;
}
html.io-dark-mode .reg-modal__success {
    background: rgba(22, 163, 74, .1);
    border-color: rgba(22, 163, 74, .25);
    color: #86efac;
}
html.io-dark-mode .reg-modal__notice {
    background: rgba(255, 237, 213, .05);
    border-color: var(--c-line);
}
html.io-dark-mode .reg-modal__footer {
    border-color: var(--c-line);
}
/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    .reg-modal-overlay {
        transition: opacity .15s ease, visibility .15s ease;
    }
    .reg-modal {
        transition: opacity .15s ease;
        transform: none;
    }
    .reg-modal-overlay.is-open .reg-modal {
        transform: none;
    }
}
/* ===== 定稿补充：方正化 / 扁平图标 / 左侧浮动导航 ===== */
main.about-page .about-stat,
main.about-page .about-dc-card,
main.about-page .about-dc-chips span,
main.about-page .about-svc-card,
main.about-page .about-hot-card,
main.about-page .about-hot-rank,
main.about-page .about-partner-card,
main.about-page .about-cta-grid,
main.about-page .about-cta-highlights li,
main.about-page .about-hero-card,
main.about-page .about-hero-panel,
main.about-page .about-hero-prod,
main.about-page .about-hero-badge,
main.about-page .about-btn,
main.about-page .about-map-links a,
main.about-page .about-map-hubtag,
main.about-page .about-pill-list li,
main.about-page .about-legal-links a,
main.about-page .about-timeline-card,
main.about-page .about-timeline-year,
main.about-page .about-anchor-nav {
    border-radius: 0;
}
/* 图标扁平：无背景、贴近字色、与标题同行 */
.about-dc-card h3 {
    display: flex;
    align-items: center;
    gap: 9px;
}
.about-svc-name {
    display: flex;
    align-items: center;
    gap: 9px;
}
.about-dc-card h3 i,
.about-svc-name i {
    flex: 0 0 auto;
    font-size: 0.95rem;
    color: #ff0000;
}
.about-stat-label i {
    margin-right: 6px;
    font-size: 0.85rem;
    color: var(--c-text-3);
}
/* 机房卡：规格要点补底，消除空感 */
main.about-page .about-dc-card {
    display: flex;
    flex-direction: column;
}
.about-dc-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 10px;
    border-top: 1px dashed var(--c-line);
}
.about-dc-chips span {
    padding: 4px 0;
    font-size: 0.75rem;
    line-height: 1.5;
}
/* 左侧浮动导航：≥1600px 悬浮于内容区外侧，滚过 hero 后出现 */
@media (min-width: 1600px) {
    .about-anchor-nav {
        position: fixed;
        top: 50%;
        bottom: auto;
        left: calc(50% - 640px - 176px);
        width: 160px;
        padding: 8px;
        background: #ffffff;
        border: 1px solid var(--c-line);
        border-radius: 0;
        box-shadow: 0 12px 32px rgba(15, 23, 42, 0.08);
        opacity: 0;
        visibility: hidden;
        transform: translateY(calc(-50% + 10px));
        transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s;
    }
    .about-anchor-nav.is-visible {
        opacity: 1;
        visibility: visible;
        transform: translateY(-50%);
    }
    .about-anchor-nav-inner {
        flex-direction: column;
        align-items: stretch;
        gap: 2px;
        overflow: visible;
    }
    .about-anchor-nav-inner::before {
        content: "本页导航";
        display: block;
        padding: 2px 12px 8px;
        margin-bottom: 4px;
        font-size: 0.6875rem;
        font-weight: 500;
        letter-spacing: 0.12em;
        color: var(--c-text-3);
        border-bottom: 1px solid var(--c-line);
    }
    .about-anchor-link {
        padding: 9px 10px 9px 12px;
        border-bottom: 0;
    }
    .about-anchor-link:hover {
        background: var(--c-bg-soft);
    }
    .about-anchor-link.is-active {
        border-bottom: 0;
        background: rgba(var(--c-accent-rgb), 0.07);
        box-shadow: inset 3px 0 0 var(--c-accent);
    }
    .about-anchor-link.is-active i {
        color: var(--c-accent);
    }
}