/* ==========================================================================
   关于中兴新云 · About V6
   编辑式长卷：完整权威内容 + 品牌底纹能力环 + 渐变历程 + 端正出版与客户矩阵。
   ========================================================================== */

.ztc-about-page {
    --about-wrap: 1240px;
    --about-pad: 36px;
    --about-section-y: 118px;
    --about-banner-gradient: var(--ztc-banner-authority);
    overflow: clip;
    color: var(--ztc-text);
    background: var(--ztc-white);
}

.ztc-about-page * { box-sizing: border-box; }
.ztc-about-page button,
.ztc-about-page a { font-family: inherit; }
.ztc-about-page h1,
.ztc-about-page h2,
.ztc-about-page h3,
.about-client-message strong { text-wrap: balance; }
.ztc-about-page [id] { scroll-margin-top: 170px; }
.ztc-about-page :focus-visible { outline: 3px solid var(--ztc-action); outline-offset: 4px; }

.about-wrap {
    width: min(100%, var(--about-wrap));
    margin-inline: auto;
    padding-inline: var(--about-pad);
}

.about-section { padding-block: var(--about-section-y); }

/* ---------- 首屏：品牌底纹 + 四路能力环 ---------- */
.about-hero {
    position: relative;
    min-height: max(760px, 94svh);
    overflow: hidden;
    color: var(--ztc-white);
    background: var(--about-banner-gradient);
}

.about-hero-inner {
    position: relative;
    z-index: 2;
    min-height: max(760px, 94svh);
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding-top: 154px;
    padding-bottom: 42px;
}

.about-hero-copy {
    width: min(720px, 61%);
    animation: about-hero-enter .9s cubic-bezier(.16, 1, .3, 1) both;
}

.about-hero h1 {
    max-width: 720px;
    margin: 20px 0 30px;
    color: var(--ztc-white);
    font-size: clamp(38px, 4.6vw, 60px);
    font-weight: 700;
    line-height: 1.08;
    letter-spacing: -.035em;
}

.about-hero h1 span { display: block; color: var(--ztc-cyan); }

.about-hero-lead {
    max-width: 720px;
    margin: 0 0 12px;
    color: rgba(255, 255, 255, .94);
    font-size: clamp(18px, 1.7vw, 23px);
    font-weight: 600;
    line-height: 1.75;
}
.about-hero-lead > span { display: block; white-space: nowrap; }

.about-hero-mission {
    max-width: 680px;
    margin: 0 0 30px;
    color: rgba(255, 255, 255, .68);
    font-size:16px;
    line-height: 1.8;
}

.about-hero-actions { display: flex; align-items: center; gap: 22px; flex-wrap: wrap; }

.about-video-link {
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    gap: 9px;
    padding: 10px 2px;
    border: 0;
    color: rgba(255, 255, 255, .88);
    background: transparent;
    font-size:14px;
    cursor: pointer;
    transition: color .24s ease;
}

.about-video-link:hover { color: var(--ztc-cyan); }
.about-video-link svg { flex: 0 0 auto; }

.about-hero-orbit {
    position: absolute;
    z-index: 1;
    top: 12%;
    right: max(42px, calc((100vw - var(--about-wrap)) / 2 + 8px));
    width: min(43vw, 590px);
    aspect-ratio: 1;
    opacity: 1;
    transform: translate3d(0, var(--about-hero-shift, 0px), 0);
    transition: transform .12s linear;
    pointer-events: none;
}

.about-hero-orbit svg { display: block; width: 100%; height: 100%; overflow: visible; opacity: .94; }
.about-orbit-halo { fill: rgba(7, 32, 60, .24); stroke: rgba(97, 204, 240, .1); }
.about-orbit-ring,
.about-orbit-flow {
    fill: none;
    stroke: rgba(255, 255, 255, .24);
    stroke-width: 1;
    vector-effect: non-scaling-stroke;
}
.about-orbit-ring--outer { stroke: rgba(97, 204, 240, .48); stroke-dasharray: 8 12; }
.about-orbit-ring--middle { stroke: rgba(255, 255, 255, .34); stroke-dasharray: 3 9; }
.about-orbit-ring--inner { stroke: rgba(97, 204, 240, .3); }
.about-orbit-flow { stroke-linecap: round; transform-box: fill-box; transform-origin: center; }
.about-orbit-flow--outer { stroke: rgba(97, 204, 240, .52); stroke-width: 1.3; stroke-dasharray: 72 24 10 36 42 68; }
.about-orbit-flow--inner { stroke: rgba(255, 255, 255, .26); stroke-dasharray: 32 18 8 28 58 46; }
.about-orbit-label line { stroke: rgba(97, 204, 240, .74); stroke-width: 1.5; vector-effect: non-scaling-stroke; }
.about-orbit-label text {
    fill: var(--ztc-white);
    font-size: 13px;
    font-weight: 700;
    text-anchor: middle;
}
.about-orbit-brand {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 38%;
    transform: translate(-50%, -50%);
}
.about-orbit-brand::before {
    content: "";
    position: absolute;
    inset: -18%;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(97, 204, 240, .1), transparent 68%);
}
.about-orbit-brand img {
    position: relative;
    display: block;
    width: 100%;
    height: auto;
    opacity: .14;
    filter: brightness(0) invert(1);
}
.about-orbit-pulse { fill: var(--ztc-brand-cyan); transform-box: fill-box; transform-origin: center; }

.about-hero-proof {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    width: 100%;
    margin-top: auto;
    padding-top: 28px;
    border-top: 1px solid rgba(255, 255, 255, .2);
    animation: about-hero-enter .9s cubic-bezier(.16, 1, .3, 1) .2s both;
}
.about-hero-proof article { min-height: 74px; padding-right: 26px; }
.about-hero-proof article + article { padding-left: 26px; border-left: 1px solid rgba(255, 255, 255, .16); }
.about-hero-proof strong { display: block; margin-bottom: 8px; color: var(--ztc-white); font-family: var(--ztc-serif); font-size: clamp(30px, 3.4vw, 48px); line-height: 1; }
.about-hero-proof article:first-child strong { color: var(--ztc-cyan); }
.about-hero-proof span { display: block; max-width: 190px; color: rgba(255, 255, 255, .64); font-size:12px; line-height: 1.5; }
.about-hero-tagline { margin: 24px 0 0; color: rgba(255, 255, 255, .52); font-size: 11px; font-weight: 700; letter-spacing: .24em; }

@keyframes about-hero-enter { from { opacity: 0; transform: translateY(26px); } to { opacity: 1; transform: none; } }
@keyframes about-orbit-forward { to { stroke-dashoffset: -120; } }
@keyframes about-orbit-reverse { to { stroke-dashoffset: 120; } }
@keyframes about-orbit-spin { to { transform: rotate(360deg); } }
@keyframes about-orbit-spin-reverse { to { transform: rotate(-360deg); } }
@keyframes about-orbit-pulse { 50% { opacity: .3; transform: scale(1.9); } }
@keyframes about-journey-flow { 50% { background-position: 100% 50%; } }
@keyframes about-year-flow { 50% { background-position: 100% 50%; } }

@media (prefers-reduced-motion: no-preference) {
    .about-orbit-ring--outer { animation: about-orbit-forward 22s linear infinite; }
    .about-orbit-ring--middle { animation: about-orbit-reverse 18s linear infinite; }
    .about-orbit-flow--outer { animation: about-orbit-spin 34s linear infinite; }
    .about-orbit-flow--inner { animation: about-orbit-spin-reverse 28s linear infinite; }
    .about-orbit-pulse { animation: about-orbit-pulse 3.2s ease-in-out infinite; }
    .about-orbit-pulse--two { animation-delay: -1.05s; }
    .about-orbit-pulse--three { animation-delay: -2.1s; }
    .about-journey { animation: about-journey-flow 28s ease-in-out infinite; }
    .about-journey-stage > strong { animation: about-year-flow 10s ease-in-out infinite; }
}

/* ---------- 页内导航：与产品页保持同一胶囊结构 ---------- */
.about-anchorbar { position: sticky; top: 86px; z-index: 60; margin: 20px 0 8px; }
.about-anchorbar ol {
    display: flex;
    gap: 4px;
    width: max-content;
    max-width: 100%;
    margin: 0 auto;
    padding: 6px;
    overflow-x: auto;
    border: 1px solid var(--ztc-border);
    border-radius: 999px;
    background: rgba(255, 255, 255, .94);
    box-shadow: 0 10px 30px rgba(10, 43, 76, .12);
    -webkit-backdrop-filter: blur(14px);
    backdrop-filter: blur(14px);
    list-style: none;
    scrollbar-width: none;
}
.about-anchorbar ol::-webkit-scrollbar { display: none; }
.about-anchorbar a {
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    padding: 9px 20px;
    border-radius: 999px;
    color: var(--ztc-text-muted);
    font-size: 14px;
    font-weight: 600;
    line-height: 1.4;
    white-space: nowrap;
    text-decoration: none;
    transition: color .2s ease, background .2s ease;
}
.about-anchorbar a:hover { color: var(--ztc-action); background: rgba(0, 142, 211, .08); }
.about-anchorbar a.is-active { color: var(--ztc-white); background: var(--ztc-action); }

/* ---------- 通用编辑式标题 ---------- */
.about-editorial-head { max-width: 1050px; margin-bottom: 76px; }
.about-editorial-head h2,
.about-group-head h2,
.about-recognition-head h2 {
    margin: 18px 0 24px;
    color: var(--ztc-text);
    font-size: clamp(32px, 2.7vw, 38px);
    line-height: 1.18;
    letter-spacing: -.025em;
}
.about-editorial-head > p:last-child { max-width: 780px; margin: 24px 0 0; color: var(--ztc-text-muted); font-size: 16px; line-height: 1.85; }
.about-editorial-head--light h2 { color: var(--ztc-white); }
.about-editorial-head--light > p:last-child { color: rgba(255, 255, 255, .7); }
.about-journey .about-editorial-head > .about-journey-intro { max-width: 980px; text-wrap: balance; }
.about-company-identity { margin: -8px 0 22px; color: var(--ztc-action); font-size: clamp(16px, 1.7vw, 20px); font-weight: 600; line-height: 1.7; }

/* ---------- 公司定位：媒体固定，全文编辑式阅读 ---------- */
.about-company { padding-top: 136px; }
.about-company-story {
    display: grid;
    grid-template-columns: minmax(340px, .78fr) minmax(0, 1.22fr);
    gap: 86px;
    align-items: start;
}
.about-company-media { position: sticky; top: 176px; }

.about-company-copy p { margin: 0 0 30px; color: var(--ztc-text-muted); font-size:16px; line-height: 2; }
.about-company-copy .about-company-lead { color: var(--ztc-text); font-family: var(--ztc-serif); font-size: clamp(20px, 2.15vw, 28px); font-weight: 600; line-height: 1.75; }

.about-first-proof {
    position: relative;
    margin: 108px 0 0;
    padding: clamp(42px, 6vw, 76px);
    overflow: hidden;
    background: var(--about-banner-gradient);
    color: var(--ztc-white);
}
.about-first-proof::after { content: "01"; position: absolute; right: 34px; bottom: -34px; color: rgba(255, 255, 255, .055); font-family: var(--ztc-serif); font-size: 190px; line-height: 1; }
.about-first-proof > span { position: relative; z-index: 1; display: block; margin-bottom: 22px; color: var(--ztc-cyan); font-size: 12px; font-weight: 700; letter-spacing: .2em; }
.about-first-proof p { position: relative; z-index: 1; max-width: 980px; margin: 0; color: rgba(255, 255, 255, .9); font-family: var(--ztc-serif); font-size: clamp(20px, 2.1vw, 27px); line-height: 1.85; }

.about-company-evidence { display: grid; grid-template-columns: .76fr 1.24fr; gap: 70px; margin-top: 82px; }
.about-evidence-item { padding-top: 24px; border-top: 2px solid var(--ztc-brand-primary); }
.about-evidence-item > span { display: block; margin-bottom: 22px; color: var(--ztc-action); font-size: 12px; font-weight: 700; letter-spacing: .12em; }
.about-evidence-item p { margin: 0; color: var(--ztc-text); font-size:16px; line-height: 1.95; }
.about-evidence-item small { display: block; margin-top: 16px; color: var(--ztc-text-muted); font-size:12px; line-height: 1.7; }

.about-company-closing {
    margin: 90px 0 0;
    padding: 42px 0;
    border-top: 1px solid var(--ztc-border);
    border-bottom: 1px solid var(--ztc-border);
    color: var(--ztc-action);
    font-family: var(--ztc-serif);
    font-size: clamp(19px, 2vw, 25px);
    line-height: 1.85;
}

/* ---------- 从 0 到 1：滚动驱动的年度叙事 ---------- */
.about-journey {
    position: relative;
    isolation: isolate;
    color: var(--ztc-white);
    background: linear-gradient(135deg, #071d37 0%, #0a3156 32%, #075c88 62%, #0b2949 100%);
    background-size: 190% 190%;
}
.about-journey::before {
    content: "";
    position: absolute;
    inset: 0;
    z-index: -1;
    background:
        radial-gradient(circle at 18% 20%, rgba(97, 204, 240, .16), transparent 30%),
        radial-gradient(circle at 82% 74%, rgba(0, 142, 211, .2), transparent 34%);
    pointer-events: none;
}
.about-journey-layout { display: grid; grid-template-columns: minmax(0, .9fr) minmax(430px, 1.1fr); gap: 92px; align-items: start; }
.about-journey-stage { position: sticky; top: 166px; min-height: 560px; padding-top: 16px; }
.about-journey-stage > p:first-child { margin: 0 0 14px; color: var(--ztc-cyan); font-size: 12px; font-weight: 700; letter-spacing: .18em; }
.about-journey-stage > strong {
    display: block;
    color: var(--ztc-white);
    background: linear-gradient(115deg, #ffffff 0%, #61ccf0 36%, #2db5e3 64%, #ffffff 100%);
    background-size: 240% 100%;
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    font-family: var(--ztc-serif);
    font-size: clamp(104px, 12vw, 166px);
    font-weight: 600;
    line-height: .88;
    letter-spacing: -.06em;
    font-variant-numeric: tabular-nums;
    transition: opacity .24s ease, transform .24s ease;
}
.about-journey-stage > span { display: block; margin-top: 18px; color: rgba(255, 255, 255, .48); font-size: 12px; font-weight: 700; letter-spacing: .14em; }
.about-journey-stage-copy { max-width: 470px; margin: 28px 0 0 !important; color: rgba(255, 255, 255, .82) !important; font-family: var(--ztc-serif); font-size:20px !important; line-height: 1.7; transition: opacity .24s ease, transform .24s ease; }

.about-journey-axis { position: relative; width: min(100%, 500px); height: 24px; display: flex; align-items: center; justify-content: space-between; margin-top: 38px; }
.about-journey-axis::before { content: ""; position: absolute; top: 11px; right: 0; left: 0; border-top: 1px dashed rgba(97, 204, 240, .35); }
.about-journey-axis > i { position: absolute; z-index: 1; top: 10px; left: 0; width: 0; height: 2px; background: var(--ztc-brand-cyan); transition: width .36s cubic-bezier(.16, 1, .3, 1); }
.about-journey-axis > b { position: relative; z-index: 2; width: 7px; height: 7px; border: 2px solid var(--ztc-brand-cyan); border-radius: 50%; background: #0a3156; transition: transform .28s ease, background .28s ease; }
.about-journey-axis > b.is-active { background: var(--ztc-brand-cyan); transform: scale(1.7); }

.about-timeline { margin: 0; padding: 0; list-style: none; }
.about-milestone {
    min-height: 300px;
    display: grid;
    grid-template-columns: 58px 130px minmax(0, 1fr);
    gap: 20px;
    align-items: start;
    padding: 46px 0 54px;
    border-top: 1px solid rgba(255, 255, 255, .16);
    opacity: .38;
    transition: opacity .35s ease, transform .35s cubic-bezier(.16, 1, .3, 1);
}
.about-milestone:last-child { border-bottom: 1px solid rgba(255, 255, 255, .16); }
.about-milestone.is-active { opacity: 1; transform: translateX(-16px); }
.about-milestone-index { padding-top: 8px; color: var(--ztc-cyan); font-size: 11px; font-weight: 700; letter-spacing: .12em; }
.about-milestone time { color: var(--ztc-white); font-family: var(--ztc-serif); font-size: 42px; font-weight: 600; line-height: 1; font-variant-numeric: tabular-nums; }
.about-milestone p { margin: 0; color: rgba(255, 255, 255, .9); font-family: var(--ztc-serif); font-size: 20px; line-height: 1.72; }

/* ---------- 集团关系：将关系图作为血统证明的主视觉 ---------- */
.about-group { background: var(--ztc-white); }
.about-group-head { display: grid; grid-template-columns: minmax(0, .95fr) minmax(0, 1.05fr); gap: 92px; align-items: end; }
.about-group-head h2 span { display: block; }
.about-group-head > p { margin: 0 0 12px; color: var(--ztc-text-muted); font-size: 16px; line-height: 1.9; }
.about-group-facts { display: grid; grid-template-columns: repeat(3, 1fr); margin-top: 72px; border-top: 1px solid var(--ztc-border); border-bottom: 1px solid var(--ztc-border); }
.about-group-facts span { min-height: 126px; display: flex; flex-direction: column; justify-content: center; gap: 8px; padding: 24px 30px; color: var(--ztc-text-muted); font-size: 12px; line-height: 1.5; }
.about-group-facts span + span { border-left: 1px solid var(--ztc-border); }
.about-group-facts strong { color: var(--ztc-action); font-family: var(--ztc-serif); font-size: 30px; line-height: 1.2; }

.about-group-map { margin: 76px 0 0; padding: 0; overflow: hidden; border-top: 1px solid var(--ztc-border); border-bottom: 1px solid var(--ztc-border); background: var(--ztc-white); }
.about-group-map img { display: block; width: 100%; max-height: 760px; padding: 32px 0; object-fit: contain; transform: scale(1.035); transition: transform 1.1s cubic-bezier(.16, 1, .3, 1), opacity .8s ease; }
.about-group-map.is-inview img { transform: scale(1); }
.about-group-map figcaption { min-height: 64px; display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 14px 0; border-top: 1px solid var(--ztc-border); color: var(--ztc-text-muted); font-size: 12px; }
.about-group-map [data-about-map-open] { min-height: 44px; padding: 8px 0 8px 20px; border: 0; color: var(--ztc-action); background: transparent; font-weight: 700; cursor: pointer; }

.about-map-dialog { width: min(96vw, 1500px); max-width: none; max-height: 94vh; margin: auto; padding: 62px 24px 24px; border: 0; background: var(--ztc-white); color: var(--ztc-text); }
.about-map-dialog::backdrop { background: rgba(10, 43, 76, .88); }
.about-map-dialog > button { position: absolute; top: 10px; right: 18px; min-width: 56px; min-height: 44px; border: 0; color: var(--ztc-action); background: transparent; font-weight: 700; cursor: pointer; }
.about-map-dialog img { display: block; width: 100%; height: auto; max-height: calc(94vh - 86px); object-fit: contain; }

/* ---------- 十一项优势：不编号，以论点连续展开 ---------- */
.about-advantages { background: var(--ztc-bg); }
.about-advantages-layout { display: grid; grid-template-columns: minmax(300px, .72fr) minmax(0, 1.28fr); gap: 88px; align-items: start; }
.about-advantages-intro { position: sticky; top: 166px; }
.about-advantages-intro h2 { margin: 18px 0 22px; color: var(--ztc-text); font-size: clamp(32px, 2.7vw, 38px); letter-spacing: -.025em; }
.about-advantages-intro > p:last-of-type { max-width: 420px; margin: 24px 0 0; color: var(--ztc-text-muted); font-size:14px; line-height: 1.85; }

.about-advantage-list { border-bottom: 1px solid var(--ztc-border); }
.about-advantage {
    display: grid;
    grid-template-columns: minmax(190px, .7fr) minmax(0, 1.3fr);
    gap: 32px;
    padding: 44px 0 50px;
    border-top: 1px solid var(--ztc-border);
    opacity: .7;
    transition: opacity .32s ease, transform .32s cubic-bezier(.16, 1, .3, 1);
}
.about-advantage:nth-child(3n + 2) { margin-left: 7%; }
.about-advantage:nth-child(3n) { margin-left: 3%; }
.about-advantage.is-active { opacity: 1; transform: translateX(-12px); }
.about-advantage h3 { margin: 0; color: var(--ztc-text); font-size: clamp(21px, 2.2vw, 28px); line-height: 1.35; transition: color .28s ease; }
.about-advantage.is-active h3 { color: var(--ztc-action); }
.about-advantage p { margin: 0; color: var(--ztc-text-muted); font-size:14px; line-height: 1.92; }

/* ---------- 知识成果：端正、可完整浏览的出版矩阵 ---------- */
.about-knowledge { background: var(--ztc-white); }
.about-publication-group { margin-top: 74px; }
.about-publication-group + .about-publication-group { margin-top: 104px; }
.about-publication-head { display: grid; grid-template-columns: minmax(260px, .7fr) minmax(0, 1.3fr); gap: 70px; align-items: end; margin-bottom: 36px; }
.about-publication-head > div > p { margin: 0 0 10px; color: var(--ztc-action); font-size: 12px; font-weight: 700; letter-spacing: .1em; }
.about-publication-head h3 { margin: 0; color: var(--ztc-text); font-size: 36px; }
.about-publication-head > p { margin: 0; color: var(--ztc-text-muted); font-size:14px; line-height: 1.88; }

.about-publication-grid { display: grid; gap: 1px; border: 1px solid var(--ztc-border); background: var(--ztc-border); }
.about-book-grid { grid-template-columns: repeat(5, minmax(0, 1fr)); }
.about-report-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.about-report-series-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.about-publication { min-width: 0; margin: 0; padding: 28px 20px 22px; background: var(--ztc-white); transition-delay: calc(var(--publication-index) * 70ms); }
.about-publication img { display: block; width: 100%; aspect-ratio: 1; object-fit: contain; transform: translateY(0); transition: transform .45s cubic-bezier(.16, 1, .3, 1); }
.about-publication:hover img { transform: translateY(-6px); }
.about-publication figcaption { display: grid; gap: 7px; min-height: 72px; margin-top: 14px; padding-top: 14px; border-top: 1px solid var(--ztc-border); }
.about-publication figcaption span { color: var(--ztc-brand-primary); font-size: 11px; font-weight: 700; }
.about-publication figcaption b { color: var(--ztc-text); font-size: 13px; font-weight: 600; line-height: 1.55; }
.about-publication-label { display: flex; align-items: center; justify-content: space-between; gap: 20px; margin: 0; padding: 18px 0; color: var(--ztc-action); font-size: 13px; font-weight: 700; letter-spacing: .08em; }
.about-publication-label span { color: var(--ztc-text-muted); font-size: 11px; font-weight: 600; letter-spacing: .05em; }
.about-publication-label--series { margin-top: 34px; }

/* ---------- 客户：数字主视觉 + 多行标杆客户矩阵 ---------- */
.about-clients { background: var(--ztc-bg); }
.about-client-head { display: grid; grid-template-columns: minmax(0, 1fr) auto; grid-template-rows: auto auto; gap: 0 36px; align-items: end; }
.about-client-head h2 { margin: 16px 0 0; color: var(--ztc-text); font-size: clamp(32px, 2.7vw, 38px); }
.about-client-head > strong { grid-row: 1 / 3; grid-column: 2; color: var(--ztc-brand-primary); font-family: var(--ztc-serif); font-size: clamp(100px, 14vw, 190px); font-weight: 600; line-height: .78; letter-spacing: -.08em; }
.about-client-head sup { font-size: .34em; vertical-align: top; }
.about-client-head > p { margin: 20px 0 0; color: var(--ztc-text-muted); font-family: var(--ztc-serif); font-size:20px; }

.about-client-message { margin-top: 76px; padding: 34px 0; border-top: 1px solid var(--ztc-border); border-bottom: 1px solid var(--ztc-border); }
.about-client-message strong { display: block; color: var(--ztc-action); font-family: var(--ztc-serif); font-size: clamp(25px, 3vw, 38px); line-height: 1.35; }
.about-client-message p { margin: 14px 0 5px; color: var(--ztc-text); font-size: 16px; }
.about-client-message span { color: var(--ztc-text-muted); font-size: 13px; }

.about-logo-wall { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 1px; margin-top: 62px; border: 1px solid var(--ztc-border); background: var(--ztc-border); }
.about-logo-cell { position: relative; min-height: 158px; display: grid; place-items: center; margin: 0; padding: 12px; overflow: hidden; color: inherit; background: var(--ztc-white); text-decoration: none; transition: background .25s ease; }
.about-logo-cell:hover { background: rgba(0, 142, 211, .035); }
.about-logo-cell img { display: block; width: min(100%, 136px); height: auto; aspect-ratio: 1; object-fit: contain; filter: saturate(.9); transition: filter .25s ease, transform .25s ease; }
.about-logo-cell:hover img { filter: saturate(1); transform: scale(1.025); }
.about-logo-more { margin: 18px 0 0; text-align: center; }
.about-logo-more a { min-width: 72px; min-height: 44px; display: inline-flex; align-items: center; justify-content: center; color: var(--ztc-action); font-family: var(--ztc-serif); font-size: 34px; line-height: 1; letter-spacing: .2em; text-decoration: none; transition: color .2s ease, transform .2s ease; }
.about-logo-more a:hover { color: var(--ztc-brand-primary); transform: translateY(-2px); }
.about-client-link { margin: 34px 0 0; text-align: right; }

/* ---------- 社会认可：奖项大排版 + 资质索引 ---------- */
.about-recognition { color: var(--ztc-white); background: var(--about-banner-gradient); }
.about-recognition-head { max-width: 850px; margin-bottom: 82px; }
.about-recognition-head h2 { color: var(--ztc-white); font-size: clamp(32px, 2.7vw, 38px); }
.about-recognition-head > p:last-child { margin: 24px 0 0; color: rgba(255, 255, 255, .72); font-family: var(--ztc-serif); font-size:20px; }
.about-recognition-layout { display: grid; grid-template-columns: minmax(0, 1.18fr) minmax(300px, .82fr); gap: 86px; align-items: start; }
.about-recognition-awards { border-bottom: 1px solid rgba(255, 255, 255, .16); }
.about-recognition-item { padding: 30px 0 36px; border-top: 1px solid rgba(255, 255, 255, .16); }
.about-recognition-item span { color: var(--ztc-cyan); font-size: 11px; font-weight: 700; letter-spacing: .1em; }
.about-recognition-item h3 { margin: 15px 0 0; color: var(--ztc-white); font-family: var(--ztc-serif); font-size: clamp(21px, 2.5vw, 31px); line-height: 1.45; }
.about-recognition-item:first-child h3 { font-size: clamp(28px, 3.4vw, 43px); }

.about-recognition-certs { position: sticky; top: 166px; padding-left: 36px; border-left: 1px solid rgba(255, 255, 255, .18); }
.about-recognition-certs > p { margin: 0 0 18px; color: var(--ztc-cyan); font-size: 12px; font-weight: 700; letter-spacing: .14em; }
.about-recognition-certs ul { margin: 0; padding: 0; border-bottom: 1px solid rgba(255, 255, 255, .14); list-style: none; }
.about-recognition-certs li { display: grid; gap: 6px; padding: 18px 0; border-top: 1px solid rgba(255, 255, 255, .14); }
.about-recognition-certs li span { color: rgba(255, 255, 255, .5); font-size:var(--ztc-fs-micro); }
.about-recognition-certs li b { color: rgba(255, 255, 255, .88); font-size:14px; font-weight: 600; line-height: 1.55; }

/* ---------- 使命、愿景与联系：大字号品牌收束 ---------- */
.about-purpose { padding-block: 124px; color: var(--ztc-white); background: var(--about-banner-gradient); }
.about-purpose-head { max-width: 1050px; }
.about-purpose-head h2 { margin: 18px 0 24px; color: var(--ztc-white); font-size: clamp(32px, 2.7vw, 38px); line-height: 1.15; letter-spacing: -.025em; }
.about-purpose-head > p:last-child { max-width: 800px; margin: 24px 0 0; color: rgba(255, 255, 255, .78); font-size:16px; line-height: 1.85; }

.about-purpose-grid { display: grid; grid-template-columns: repeat(2, 1fr); margin-top: 74px; }
.about-purpose-grid article { min-height: 360px; display: grid; grid-template-rows: auto minmax(0, 1fr); padding: clamp(36px, 5vw, 62px); border: 1px solid rgba(255, 255, 255, .22); }
.about-purpose-grid article:first-child { color: var(--ztc-text); background: var(--ztc-white); }
.about-purpose-grid article:last-child { background: linear-gradient(145deg, #0a3a66 0%, #0067b4 100%); }
.about-purpose-grid span { color: var(--ztc-brand-primary); font-size: 12px; font-weight: 700; letter-spacing: .16em; }
.about-purpose-grid article:last-child span { color: var(--ztc-cyan); }
.about-purpose-grid h3 { max-width: 490px; margin: 0; align-self: center; color: inherit; font-size: clamp(32px, 3.6vw, 44px); line-height: 1.22; letter-spacing: -.025em; text-wrap: balance; }

.about-contact { padding-block: 86px; background: var(--ztc-white); }
.about-contact-inner { display: grid; grid-template-columns: minmax(0, 1fr) minmax(420px, .86fr); gap: 80px; align-items: end; }
.about-contact-inner h2 { margin: 14px 0 16px; color: var(--ztc-text); font-size: clamp(32px, 2.7vw, 38px); }
.about-contact-inner > div:first-child > p:last-child { margin: 0; color: var(--ztc-text-muted); font-size:16px; }
.about-contact-links { display: grid; grid-template-columns: repeat(2, 1fr); border-top: 1px solid var(--ztc-border); border-bottom: 1px solid var(--ztc-border); }
.about-contact-links a { min-height: 92px; display: flex; flex-direction: column; justify-content: center; gap: 6px; padding: 18px 22px; text-decoration: none; }
.about-contact-links a + a { border-left: 1px solid var(--ztc-border); }
.about-contact-links span { color: var(--ztc-text-muted); font-size: 11px; }
.about-contact-links b { color: var(--ztc-action); font-size:16px; word-break: break-word; }

@media (max-width: 1120px) {
    .about-hero-copy { width: 64%; }
    .about-hero-orbit > svg { opacity: .78; }
    .about-company-story { grid-template-columns: minmax(300px, .75fr) minmax(0, 1.25fr); gap: 56px; }
    .about-journey-layout { gap: 58px; }
    .about-advantages-layout { grid-template-columns: 280px minmax(0, 1fr); gap: 58px; }
    .about-advantage { grid-template-columns: minmax(160px, .66fr) minmax(0, 1.34fr); gap: 24px; }
    .about-recognition-layout { gap: 58px; }
}

/* 低高度桌面端不吸住高于可视区的荣誉列，避免内容末端被锁在屏幕外。 */
@media (min-width: 901px) and (max-height: 960px) {
    .about-recognition-certs { position: static; }
}

@media (max-width: 900px) {
    .ztc-about-page { --about-pad: 26px; --about-section-y: 88px; }
    .about-hero,
    .about-hero-inner { min-height: 900px; }
    .about-hero-inner { padding-top: 142px; }
    .about-hero-copy { width: 100%; }
    .about-hero h1 { max-width: 680px; }
    .about-hero-orbit { top: 31%; right: 24px; width: min(58vw, 500px); }
    .about-hero-orbit > svg { opacity: .5; }
    .about-hero-proof { grid-template-columns: repeat(2, 1fr); row-gap: 20px; }
    .about-hero-proof article:nth-child(3) { padding-left: 0; border-left: 0; }
    .about-hero-proof article:nth-child(n + 3) { padding-top: 20px; border-top: 1px solid rgba(255, 255, 255, .14); }
    .about-anchorbar { top: 76px; margin: 14px 0 6px; }
    .about-anchorbar a { padding: 8px 14px; font-size: 13px; }

    .about-company-story,
    .about-group-head,
    .about-advantages-layout,
    .about-recognition-layout,
    .about-contact-inner { grid-template-columns: 1fr; }
    .about-company-story { gap: 42px; }
    .about-company-media,
    .about-advantages-intro,
    .about-recognition-certs { position: static; }
    .about-company-media .ztc-video-facade { max-width: 720px; }
    .about-company-evidence { grid-template-columns: 1fr; gap: 44px; }

    .about-journey-layout { grid-template-columns: 1fr; }
    .about-journey-stage { display: none; }
    .about-milestone { position: relative; min-height: 0; grid-template-columns: 54px 112px minmax(0, 1fr); padding: 38px 0 42px 26px; opacity: 1; transform: none !important; }
    .about-milestone::before { content: ""; position: absolute; top: 0; bottom: 0; left: 6px; border-left: 1px dashed rgba(97, 204, 240, .42); }
    .about-milestone::after { content: ""; position: absolute; top: 46px; left: 2px; width: 9px; height: 9px; border-radius: 50%; background: var(--ztc-brand-cyan); }

    .about-group-head { gap: 32px; }
    .about-group-facts { grid-template-columns: 1fr; }
    .about-group-facts span { min-height: 104px; }
    .about-group-facts span + span { border-top: 1px solid var(--ztc-border); border-left: 0; }

    .about-advantages-layout { gap: 42px; }
    .about-advantages-intro { display: block; }
    .about-advantage { margin-left: 0 !important; opacity: 1; transform: none !important; }

    .about-publication-head { grid-template-columns: 1fr; gap: 20px; }
    .about-book-grid,
    .about-report-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .about-report-series-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .about-client-head > strong { font-size: 126px; }
    .about-logo-wall { grid-template-columns: repeat(4, minmax(0, 1fr)); }
    .about-recognition-certs { padding: 32px 0 0; border-top: 1px solid rgba(255, 255, 255, .2); border-left: 0; }
    .about-purpose-grid article { min-height: 310px; }
    .about-contact-inner { gap: 40px; }
}

@media (max-width: 620px) {
    .ztc-about-page { --about-pad: 20px; --about-section-y: 72px; }
    .about-hero,
    .about-hero-inner { min-height: 1160px; }
    .about-hero-inner { justify-content: flex-start; padding-top: 128px; padding-bottom: 30px; }
    .about-hero h1 { margin-top: 16px; font-size: clamp(38px, 10.8vw, 48px); line-height: 1.08; }
    .about-hero-lead { font-size:18px; line-height: 1.72; }
    .about-hero-actions { align-items: flex-start; flex-direction: column; gap: 8px; }
    .about-hero-orbit { top: 46.5%; right: auto; left: 50%; width: min(92vw, 390px); transform: translate3d(-50%, var(--about-hero-shift, 0px), 0); }
    .about-hero-orbit > svg { opacity: .76; }
    .about-orbit-brand img { opacity: .17; }
    .about-hero-proof { margin-top: auto; padding-top: 20px; }
    .about-hero-proof article { min-height: 64px; padding-right: 14px; }
    .about-hero-proof article + article { padding-left: 14px; }
    .about-hero-proof strong { font-size:var(--ztc-fs-h2); }
    .about-hero-proof span { font-size:var(--ztc-fs-micro); }
    .about-hero-tagline { margin-top: 18px; }
    .about-anchorbar .about-wrap { padding-inline: 10px; }

    .about-editorial-head { margin-bottom: 50px; }
    .about-editorial-head h2,
    .about-group-head h2,
    .about-recognition-head h2 { font-size: 32px; }
    .about-company-identity { font-size: 16px; }
    .about-company { padding-top: 86px; }
    .about-company-copy .about-company-lead { font-size: 20px; }
    .about-first-proof { margin-top: 68px; padding: 32px 24px; }
    .about-first-proof::after { right: 10px; font-size: 112px; }
    .about-first-proof p { font-size: 18px; line-height: 1.82; }
    .about-company-evidence { margin-top: 56px; }
    .about-company-closing { margin-top: 60px; padding: 32px 0; font-size: 18px; }

    .about-milestone { grid-template-columns: 42px 82px minmax(0, 1fr); gap: 10px; padding-left: 24px; }
    .about-milestone time { font-size:30px; }
    .about-milestone p { font-size:16px; line-height: 1.68; }
    .about-milestone-index { font-size:var(--ztc-fs-micro); }

    .about-group-facts { margin-top: 48px; }
    .about-group-map { margin-top: 50px; }
    .about-group-map img { padding: 18px 0; }
    .about-group-map figcaption { align-items: flex-start; flex-direction: column; gap: 4px; padding: 12px 0; }
    .about-group-map [data-about-map-open] { padding-left: 0; }
    .about-map-dialog { width: 100vw; height: 100vh; max-height: none; padding: 66px 12px 12px; overflow: auto; }
    .about-map-dialog img { max-width: none; width: 1160px; height: calc(100vh - 86px); object-fit: contain; }

    .about-advantages-intro { display: block; }
    .about-advantages-intro h2 { font-size: 32px; }
    .about-advantage { grid-template-columns: 1fr; gap: 14px; padding: 34px 0 38px; }
    .about-advantage h3 { font-size:20px; }
    .about-advantage p { font-size: 14px; }

    .about-publication-group { margin-top: 56px; }
    .about-publication-group + .about-publication-group { margin-top: 78px; }
    .about-book-grid,
    .about-report-grid,
    .about-report-series-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .about-publication { padding: 20px 12px 18px; }
    .about-publication figcaption b { font-size: 12px; }

    .about-client-head { grid-template-columns: 1fr; }
    .about-client-head > strong { grid-row: auto; grid-column: 1; margin-top: 34px; font-size: 108px; }
    .about-client-message { margin-top: 48px; }
    .about-logo-wall { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .about-logo-cell { min-height: 120px; padding: 8px; }
    .about-logo-cell img { width: min(100%, 104px); }
    .about-client-link { text-align: center; }

    .about-recognition-head { margin-bottom: 56px; }
    .about-recognition-item { padding: 24px 0 28px; }
    .about-recognition-item h3 { font-size:20px; }
    .about-recognition-item:first-child h3 { font-size:var(--ztc-fs-h2); }

    .about-purpose { padding-block: 82px; }
    .about-purpose-head h2 { font-size: 32px; }
    .about-purpose-grid { grid-template-columns: 1fr; margin-top: 52px; }
    .about-purpose-grid article { min-height: 250px; padding: 34px 28px; }
    .about-purpose-grid h3 { font-size: 34px; }
    .about-contact { padding-block: 68px; }
    .about-contact-links { grid-template-columns: 1fr; }
    .about-contact-links a + a { border-top: 1px solid var(--ztc-border); border-left: 0; }
}

@media (max-width: 440px) {
    .about-logo-wall { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .about-logo-cell { min-height: 138px; }
    .about-logo-cell img { width: min(100%, 122px); }
}

@media (max-width: 360px) {
    .about-hero-lead > span { white-space: normal; }
}

@media (prefers-reduced-motion: reduce) {
    .about-hero-copy,
    .about-hero-proof { animation: none; }
    .about-hero-orbit { transition: none; }
    .about-orbit-ring,
    .about-orbit-flow,
    .about-orbit-pulse,
    .about-journey,
    .about-journey-stage > strong { animation: none; }
    .about-group-map img,
    .about-publication img,
    .about-milestone,
    .about-advantage { transition: none; transform: none !important; }
}

/* 08 本地收尾：原出版矩阵成为可继续阅读的入口。 */
.about-publication-link { display: block; min-width: 0; color: inherit; background: var(--ztc-white); text-decoration: none; }
.about-publication-link .about-publication { height: 100%; }
.about-publication-link:hover figcaption b { color: var(--ztc-action); }
.about-publication-link:focus-visible { outline: 2px solid var(--ztc-action); outline-offset: -3px; }
.about-publication-link:focus-visible img { transform: translateY(-6px); }
.about-group-map [data-about-map-open] { display: inline-flex; align-items: center; min-height: 44px; text-decoration: none; }
@media (prefers-reduced-motion: reduce) { .about-publication-link img { transition: none; transform: none; } }

.about-contact-links .about-office-link b{display:inline-flex;align-items:center;gap:12px;font-size:var(--ztc-fs-small)}