/* ============================================================
   about.css — 关于嗨谛 / 嗨谛智能 · 企业能力工厂
   作用域：body.about-page，复用 site.css 变量，不污染其他页面
   ============================================================ */

.about-page {
    --az-ink: #070a0f;
    --az-ink-2: #0b1118;
    --az-ink-3: #111925;
    --az-line: rgba(148, 186, 214, 0.16);
    --az-line-strong: rgba(148, 186, 214, 0.28);
    --az-cyan: #31dfe8;
    --az-cyan-soft: rgba(49, 223, 232, 0.12);
    --az-cyan-line: rgba(49, 223, 232, 0.34);
    --az-blue: #336df4;
    --az-amber: #d9a441;
    --az-text: #e7eef6;
    --az-muted: rgba(231, 238, 246, 0.62);
    --az-ice: #f4f6f9;
    --az-ice-2: #edf1f5;
    --az-body: #1f2329;
}

.about-page .az-main {
    background: #fff;
    overflow: clip;
}

/* ============ 通用排版 ============ */
.about-page .az-section {
    position: relative;
    padding: 104px 0;
}

.about-page .az-dark {
    background: var(--az-ink);
    color: var(--az-text);
}

.about-page .az-eyebrow {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.16em;
    color: var(--az-blue);
    margin-bottom: 20px;
    text-transform: uppercase;
}

.about-page .az-eyebrow span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 26px;
    height: 20px;
    padding: 0 5px;
    border: 1px solid currentColor;
    border-radius: 3px;
    font-size: 11px;
    letter-spacing: 0.06em;
}

.about-page .az-dark .az-eyebrow {
    color: var(--az-cyan);
}

.about-page .az-title {
    font-size: clamp(1.95rem, 3.6vw, 3.05rem);
    font-weight: 800;
    line-height: 1.22;
    letter-spacing: -0.025em;
    color: var(--az-body);
}

.about-page .az-dark .az-title {
    color: #fff;
}

.about-page .az-lead {
    font-size: 15.5px;
    line-height: 1.8;
    color: var(--n-700);
    max-width: none;
}

.about-page .az-dark .az-lead {
    color: var(--az-muted);
}

.about-page .az-accent {
    color: var(--az-cyan);
}

.about-page .az-conclusion {
    margin-top: 56px;
    padding: 22px 0;
    text-align: center;
    font-size: clamp(1.2rem, 2vw, 1.55rem);
    font-weight: 500;
    line-height: 1.55;
    color: var(--n-950);
}

.about-page .az-dark .az-conclusion {
    color: #fff;
}

.about-page .az-conclusion strong {
    font-weight: 700;
    color: var(--az-blue);
}

.about-page .az-dark .az-conclusion strong {
    color: var(--az-cyan);
}

/* ============ 01 HERO ============ */
.about-page .az-hero {
    position: relative;
    min-height: calc(100vh - var(--nav-h));
    display: flex;
    align-items: center;
    background: var(--az-ink);
    color: #fff;
    overflow: hidden;
}

.about-page .az-hero-bg {
    position: absolute;
    inset: 0;
    background: url("../assets/images/abouthd.png") center right / cover no-repeat;
    opacity: 0.72;
}

.about-page .az-hero::after {
    content: "";
    position: absolute;
    inset: 0;
    background:
        linear-gradient(90deg, rgba(6, 9, 14, 0.97) 0%, rgba(6, 9, 14, 0.88) 34%, rgba(6, 9, 14, 0.34) 70%, rgba(6, 9, 14, 0.6) 100%),
        linear-gradient(0deg, var(--az-ink) 0%, rgba(7, 10, 15, 0) 38%);
}

.about-page .az-hero-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(148, 186, 214, 0.07) 1px, transparent 1px),
        linear-gradient(90deg, rgba(148, 186, 214, 0.07) 1px, transparent 1px);
    background-size: 72px 72px;
    -webkit-mask-image: linear-gradient(90deg, #000 0%, rgba(0, 0, 0, 0.5) 55%, transparent 82%);
    mask-image: linear-gradient(90deg, #000 0%, rgba(0, 0, 0, 0.5) 55%, transparent 82%);
}

.about-page .az-hero-scan {
    position: absolute;
    left: 0;
    right: 0;
    top: 22%;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(49, 223, 232, 0.5), transparent);
    opacity: 0.5;
    animation: az-scan 9s ease-in-out infinite;
    z-index: 1;
}

@keyframes az-scan {
    0%, 100% { transform: translateY(0); opacity: 0.15; }
    50% { transform: translateY(34vh); opacity: 0.5; }
}

.about-page .az-hero-inner {
    position: relative;
    z-index: 2;
    width: 100%;
    max-width: var(--container);
    margin: 0 auto;
    padding: 118px 20px 126px;
}

.about-page .az-hero-kicker {
    display: flex;
    align-items: baseline;
    gap: 14px;
    margin-bottom: 26px;
    font-size: 13px;
    letter-spacing: 0.22em;
    color: rgba(255, 255, 255, 0.72);
}

.about-page .az-hero-kicker span {
    color: var(--az-cyan);
    font-weight: 600;
}

.about-page .az-hero h1 {
    max-width: 960px;
    font-size: clamp(2.45rem, 5.4vw, 4.7rem);
    font-weight: 800;
    line-height: 1.08;
    letter-spacing: -0.035em;
    margin-bottom: 26px;
    text-shadow: 0 2px 30px rgba(0, 0, 0, 0.35);
}

.about-page .az-hero-name {
    display: block;
    color: #fff;
    letter-spacing: 0.03em;
}

.about-page .az-hero-pos {
    display: block;
    margin-top: 12px;
    font-size: clamp(1.35rem, 2.6vw, 2.15rem);
    font-weight: 600;
    letter-spacing: 0.16em;
    color: var(--az-cyan);
    text-shadow: 0 2px 18px rgba(0, 0, 0, 0.4);
}

.about-page .az-hero-statement {
    margin-bottom: 16px;
    font-size: clamp(1.02rem, 1.7vw, 1.28rem);
    font-weight: 500;
    line-height: 1.6;
    color: rgba(255, 255, 255, 0.9);
}

.about-page .az-hero-sub {
    max-width: 660px;
    font-size: clamp(0.98rem, 1.5vw, 1.1rem);
    line-height: 1.85;
    color: rgba(255, 255, 255, 0.72);
    margin-bottom: 42px;
}

.about-page .az-hero-brand {
    display: inline-flex;
    align-items: center;
    gap: 18px;
    padding: 14px 0;
    border-top: 1px solid rgba(255, 255, 255, 0.18);
    border-bottom: 1px solid rgba(255, 255, 255, 0.18);
    margin-bottom: 44px;
}

.about-page .az-hero-brand-mark {
    font-size: 21px;
    font-weight: 800;
    letter-spacing: 0.18em;
    color: #fff;
}

.about-page .az-hero-brand-text {
    padding-left: 18px;
    border-left: 1px solid rgba(255, 255, 255, 0.24);
    font-size: 13px;
    line-height: 1.65;
    color: rgba(255, 255, 255, 0.7);
}

.about-page .az-hero-facts {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    max-width: 760px;
    border-top: 1px solid rgba(255, 255, 255, 0.14);
    padding-top: 22px;
    gap: 20px;
}

.about-page .az-hero-facts span {
    display: block;
    font-size: 11px;
    letter-spacing: 0.14em;
    color: rgba(255, 255, 255, 0.45);
    margin-bottom: 6px;
}

.about-page .az-hero-facts strong {
    font-size: 14px;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.92);
    letter-spacing: 0.01em;
}

.about-page .az-hero-scroll {
    position: absolute;
    right: 34px;
    bottom: 34px;
    z-index: 3;
    display: flex;
    align-items: center;
    gap: 10px;
    color: rgba(255, 255, 255, 0.6);
    font-size: 10px;
    letter-spacing: 0.24em;
    writing-mode: vertical-rl;
}

.about-page .az-hero-scroll svg {
    writing-mode: horizontal-tb;
    animation: az-bounce 2.4s ease-in-out infinite;
}

.about-page .az-hero-scroll:hover {
    color: var(--az-cyan);
    text-decoration: none;
}

@keyframes az-bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(7px); }
}

/* ============ 02 BRAND — 企业能力工厂 ============ */
.about-page .az-brand {
    background: #fff;
}

.about-page .az-brand-head {
    display: grid;
    grid-template-columns: 1.15fr 0.85fr;
    gap: 64px;
    align-items: end;
}

.about-page .az-brand-head .az-lead {
    padding-bottom: 6px;
}

.about-page .az-factory {
    display: grid;
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.5fr) minmax(0, 0.9fr);
    margin-top: 52px;
    border: 1px solid var(--n-300);
    border-radius: 4px;
    overflow: hidden;
    background: #fff;
}

.about-page .az-factory-port {
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 34px 28px;
    background: var(--n-50);
}

.about-page .az-factory-port h3 {
    font-size: clamp(1.4rem, 2.2vw, 1.8rem);
    font-weight: 800;
    letter-spacing: -0.01em;
    color: var(--n-950);
    margin-bottom: 6px;
}

.about-page .az-factory-port > p:last-child {
    font-size: 12.5px;
    letter-spacing: 0.04em;
    color: var(--n-600);
}

.about-page .az-factory-label {
    font-size: 10px;
    font-weight: 600;
    letter-spacing: 0.18em;
    color: var(--n-600);
    margin-bottom: 14px;
}

.about-page .az-factory-core {
    padding: 34px 30px;
    text-align: center;
    background:
        radial-gradient(circle at 50% 0%, rgba(49, 223, 232, 0.1), transparent 70%),
        var(--az-ink);
    color: #fff;
    border-left: 1px solid var(--n-300);
    border-right: 1px solid var(--n-300);
}

.about-page .az-factory-core .az-factory-label {
    color: var(--az-cyan);
}

.about-page .az-factory-core > strong {
    display: block;
    font-size: clamp(1.85rem, 3vw, 2.55rem);
    font-weight: 800;
    letter-spacing: 0.06em;
    color: #fff;
}

.about-page .az-factory-cores {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin: 16px 0 18px;
}

.about-page .az-factory-cores span {
    padding: 4px 14px;
    border: 1px solid var(--az-cyan-line);
    border-radius: 3px;
    font-size: 12px;
    letter-spacing: 0.1em;
    color: var(--az-cyan);
}

.about-page .az-factory-flow {
    font-size: 11.5px;
    letter-spacing: 0.06em;
    color: rgba(255, 255, 255, 0.58);
}

.about-page .az-architecture {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto minmax(0, 1.35fr);
    align-items: stretch;
    gap: 16px;
    margin-top: 22px;
}

.about-page .az-architecture-block {
    padding: 20px 24px;
    border: 1px solid var(--n-300);
    border-radius: 4px;
    background: #fff;
}

.about-page .az-architecture-block span {
    display: block;
    font-size: 10px;
    font-weight: 600;
    letter-spacing: 0.16em;
    color: var(--n-600);
    margin-bottom: 8px;
}

.about-page .az-architecture-block strong {
    display: block;
    font-size: 20px;
    font-weight: 800;
    letter-spacing: 0.02em;
    color: var(--n-950);
}

.about-page .az-architecture-block em {
    display: block;
    margin-top: 4px;
    font-style: normal;
    font-size: 12.5px;
    color: var(--n-700);
}

.about-page .az-architecture-products strong {
    font-size: 16px;
    letter-spacing: 0.01em;
}

.about-page .az-architecture-arrow {
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    color: var(--az-blue);
}

.about-page .az-brand-tabs {
    display: grid;
    grid-template-columns: minmax(220px, 292px) minmax(0, 1fr);
    gap: 52px;
    margin-top: 54px;
}

.about-page .az-brand-tabs-nav {
    display: flex;
    flex-direction: column;
    align-self: start;
    border-left: 1px solid var(--n-300);
}

.about-page .az-brand-tab {
    position: relative;
    display: block;
    width: 100%;
    padding: 16px 18px 17px 22px;
    font: inherit;
    text-align: left;
    color: var(--n-600);
    background: transparent;
    border: 0;
    cursor: pointer;
    transition: background 0.18s ease, color 0.18s ease;
}

.about-page .az-brand-tab::before {
    content: "";
    position: absolute;
    left: -1px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: transparent;
    transition: background 0.18s ease;
}

.about-page .az-brand-tab:hover {
    color: var(--n-950);
    background: var(--az-ice);
}

.about-page .az-brand-tab.is-active {
    color: var(--n-950);
    background: var(--az-ice);
}

.about-page .az-brand-tab.is-active::before {
    background: var(--az-blue);
}

.about-page .az-brand-point-no {
    display: block;
    font-size: 10.5px;
    font-weight: 600;
    letter-spacing: 0.14em;
    color: var(--n-500);
    margin-bottom: 8px;
    transition: color 0.18s ease;
}

.about-page .az-brand-tab.is-active .az-brand-point-no {
    color: var(--az-blue);
}

.about-page .az-brand-tab strong {
    display: block;
    font-size: 15px;
    line-height: 1.5;
    font-weight: 700;
    color: inherit;
}

.about-page .az-brand-panels {
    min-width: 0;
}

.about-page .az-brand-panel[hidden] {
    display: none;
}

.about-page .az-brand-panel.is-active {
    animation: az-panel-in 0.26s ease;
}

.about-page .az-brand-figure {
    margin: 0;
    padding: 22px;
    background: var(--az-ice);
    border: 1px solid var(--n-300);
    border-radius: 4px;
}

.about-page .az-brand-figure img {
    display: block;
    width: auto;
    max-width: 100%;
    height: auto;
    max-height: 460px;
    margin: 0 auto;
}

.about-page .az-brand-caption {
    margin-top: 18px;
    font-size: 13.5px;
    line-height: 1.85;
    color: var(--n-700);
    text-align: center;
}

/* ============ 03 PROBLEM ============ */
.about-page .az-problem {
    background: var(--az-ice);
}

.about-page .az-problem-head {
    display: grid;
    grid-template-columns: 1.15fr 0.85fr;
    gap: 64px;
    align-items: end;
}

.about-page .az-problem-head .az-title {
    font-size: clamp(1.85rem, 3.1vw, 2.6rem);
}

.about-page .az-problem-head .az-lead {
    padding-bottom: 6px;
}

.about-page .az-problem-figure {
    margin: 52px auto 0;
    max-width: 980px;
}

.about-page .az-problem-figure img {
    display: block;
    width: 100%;
    height: auto;
    border-radius: 4px;
    filter: saturate(0.92) contrast(1.02);
}

.about-page .az-problem-figure figcaption {
    margin-top: 12px;
    font-size: 12.5px;
    color: var(--n-600);
    border-left: 2px solid var(--az-line-strong);
    padding-left: 10px;
}

.about-page .az-problem-list {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    column-gap: 40px;
    margin-top: 48px;
}

.about-page .az-problem-item {
    display: grid;
    grid-template-columns: 48px 1fr;
    gap: 14px;
    padding: 24px 0;
    border-top: 1px solid rgba(31, 35, 41, 0.13);
}

.about-page .az-problem-item:nth-child(n + 4) {
    border-bottom: 1px solid rgba(31, 35, 41, 0.13);
}

.about-page .az-problem-no {
    font-family: "SF Mono", "JetBrains Mono", Menlo, monospace;
    font-size: 14px;
    font-weight: 700;
    color: var(--az-blue);
    letter-spacing: 0.08em;
    padding-top: 4px;
}

.about-page .az-problem-item h3 {
    font-size: 18px;
    line-height: 1.5;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--n-950);
}

.about-page .az-problem-item p:not(.az-problem-no) {
    font-size: 14.5px;
    line-height: 1.8;
    color: var(--n-700);
}

.about-page .az-problem-conclusion {
    margin-top: 36px;
    padding: 26px 28px;
    background: var(--az-ink);
    color: #fff;
    border-left: 3px solid var(--az-cyan);
}

.about-page .az-problem-conclusion p {
    font-size: 18px;
    line-height: 1.7;
}

.about-page .az-problem-conclusion strong {
    color: var(--az-cyan);
    font-weight: 700;
}

/* ============ 03 FUTURE / ATLAS ============ */
.about-page .az-future {
    background: #fff;
}

.about-page .az-future-head {
    display: grid;
    grid-template-columns: 1.55fr 0.45fr;
    gap: 44px;
    align-items: end;
}

.about-page .az-future-head .az-title {
    font-size: clamp(1.8rem, 2.9vw, 2.55rem);
}

.about-page .az-future-head .az-lead {
    padding-bottom: 6px;
}

.about-page .az-future-figure {
    margin: 48px auto 0;
    max-width: 880px;
}

.about-page .az-future .az-conclusion {
    margin-top: 24px;
}

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

.about-page .az-atlas {
    display: grid;
    grid-template-columns: minmax(0, 1.42fr) minmax(0, 0.58fr);
    gap: 38px;
    margin-top: 54px;
    align-items: stretch;
}

.about-page .az-atlas-visual {
    position: relative;
    padding: 22px 22px 18px;
    background:
        radial-gradient(circle at 50% 45%, rgba(49, 223, 232, 0.06), transparent 55%),
        linear-gradient(180deg, rgba(255, 255, 255, 0.028), rgba(255, 255, 255, 0.012));
    border: 1px solid var(--az-line);
    border-radius: 4px;
}

.about-page .az-atlas-toolbar {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    color: rgba(231, 238, 246, 0.44);
    font-size: 10.5px;
    letter-spacing: 0.14em;
}

.about-page .az-atlas-hint {
    color: var(--az-cyan);
    letter-spacing: 0.04em;
}

.about-page .az-atlas-svg {
    display: block;
    width: 100%;
    height: auto;
    margin-top: 4px;
    font-family: inherit;
}

.about-page .az-svg-label {
    fill: rgba(231, 238, 246, 0.4);
    font-size: 10px;
    letter-spacing: 0.16em;
}

.about-page .az-value-node rect {
    fill: rgba(255, 255, 255, 0.035);
    stroke: var(--az-line-strong);
    stroke-width: 1;
}

.about-page .az-value-zh {
    fill: #fff;
    font-size: 18px;
    font-weight: 700;
    letter-spacing: 0.04em;
}

.about-page .az-value-en {
    fill: rgba(231, 238, 246, 0.42);
    font-size: 9px;
    letter-spacing: 0.12em;
}

.about-page .az-svg-line {
    stroke: var(--az-line-strong);
    stroke-width: 1;
}

.about-page .az-loop-path {
    fill: none;
    stroke: var(--az-cyan-line);
    stroke-width: 1.2;
    stroke-dasharray: 7 7;
    opacity: 0.7;
}

.about-page .az-loop-core circle:first-child {
    fill: rgba(49, 223, 232, 0.055);
    stroke: var(--az-cyan-line);
    stroke-width: 1;
}

.about-page .az-loop-core circle:last-of-type {
    fill: none;
    stroke: rgba(49, 223, 232, 0.18);
    stroke-width: 1;
}

.about-page .az-core-en {
    fill: rgba(231, 238, 246, 0.5);
    font-size: 8.5px;
    letter-spacing: 0.13em;
}

.about-page .az-core-zh {
    fill: #fff;
    font-size: 21px;
    font-weight: 800;
    letter-spacing: 0.08em;
}

.about-page .az-core-eq {
    fill: var(--az-cyan);
    font-size: 9px;
    letter-spacing: 0.14em;
}

.about-page .az-stage {
    cursor: pointer;
    outline: none;
}

.about-page .az-stage-ring {
    fill: none;
    stroke: rgba(49, 223, 232, 0.16);
    stroke-width: 1;
}

.about-page .az-stage-dot {
    fill: rgba(9, 14, 21, 0.92);
    stroke: rgba(49, 223, 232, 0.4);
    stroke-width: 1;
    transition: fill 0.22s ease, stroke 0.22s ease;
}

.about-page .az-stage-no {
    fill: rgba(49, 223, 232, 0.62);
    font-size: 9px;
    font-weight: 600;
    letter-spacing: 0.08em;
}

.about-page .az-stage-zh {
    fill: rgba(255, 255, 255, 0.82);
    font-size: 16px;
    font-weight: 700;
}

.about-page .az-stage-en {
    fill: rgba(231, 238, 246, 0.4);
    font-size: 8.5px;
    letter-spacing: 0.16em;
}

.about-page .az-stage:hover .az-stage-dot,
.about-page .az-stage:focus-visible .az-stage-dot {
    fill: rgba(49, 223, 232, 0.12);
    stroke: var(--az-cyan);
}

.about-page .az-stage.is-active .az-stage-ring {
    stroke: rgba(49, 223, 232, 0.42);
}

.about-page .az-stage.is-active .az-stage-dot {
    fill: rgba(49, 223, 232, 0.14);
    stroke: var(--az-cyan);
    filter: drop-shadow(0 0 12px rgba(49, 223, 232, 0.35));
}

.about-page .az-stage.is-active .az-stage-zh {
    fill: #fff;
}

.about-page .az-stage.is-active .az-stage-no {
    fill: var(--az-cyan);
}

.about-page .az-atlas-equation {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-top: 4px;
    padding-top: 16px;
    border-top: 1px solid var(--az-line);
    font-size: 13px;
    color: rgba(231, 238, 246, 0.6);
}

.about-page .az-atlas-equation em {
    font-style: normal;
    color: var(--az-cyan);
    font-size: 15px;
}

.about-page .az-atlas-equation strong {
    color: #fff;
    font-weight: 700;
}

.about-page .az-atlas-readout {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding-left: 38px;
    border-left: 1px solid var(--az-line);
}

.about-page .az-atlas-panel-no {
    font-family: "SF Mono", "JetBrains Mono", Menlo, monospace;
    font-size: 11px;
    letter-spacing: 0.14em;
    color: var(--az-cyan);
    margin-bottom: 18px;
}

.about-page .az-atlas-panel h3 {
    font-size: clamp(1.7rem, 2.6vw, 2.2rem);
    font-weight: 800;
    letter-spacing: -0.01em;
    margin-bottom: 14px;
    color: #fff;
}

.about-page .az-atlas-panel h3 span {
    margin-left: 10px;
    font-size: 10px;
    font-weight: 500;
    letter-spacing: 0.16em;
    color: rgba(231, 238, 246, 0.4);
    vertical-align: 6px;
}

.about-page .az-atlas-desc {
    font-size: 14.5px;
    line-height: 1.8;
    color: var(--az-muted);
    margin-bottom: 26px;
}

.about-page .az-atlas-label,
.about-page .az-product-label,
.about-page .az-action-contact-label {
    font-size: 10.5px;
    font-weight: 600;
    letter-spacing: 0.16em;
    color: rgba(231, 238, 246, 0.4);
    margin-bottom: 10px;
}

.about-page .az-atlas-chips {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 28px;
}

.about-page .az-atlas-chips li {
    padding: 6px 12px;
    border: 1px solid var(--az-line-strong);
    border-radius: 3px;
    font-size: 12.5px;
    color: rgba(255, 255, 255, 0.86);
    background: rgba(255, 255, 255, 0.025);
}

.about-page .az-atlas-output {
    border-top: 1px solid var(--az-line);
    padding-top: 14px;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.78);
    line-height: 1.7;
}

.about-page .az-atlas-output span {
    display: inline-block;
    margin-right: 10px;
    font-size: 9.5px;
    letter-spacing: 0.16em;
    color: var(--az-cyan);
}

.about-page .az-atlas-switch {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-top: 28px;
    padding-top: 18px;
    border-top: 1px solid var(--az-line);
}

.about-page .az-atlas-switch button {
    flex: 1 1 auto;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 7px 10px;
    font: inherit;
    font-size: 12px;
    color: rgba(255, 255, 255, 0.6);
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid transparent;
    border-radius: 3px;
    cursor: pointer;
    transition: color 0.18s ease, border-color 0.18s ease, background 0.18s ease;
}

.about-page .az-atlas-switch button span {
    font-family: "SF Mono", "JetBrains Mono", Menlo, monospace;
    font-size: 9.5px;
    color: rgba(49, 223, 232, 0.62);
}

.about-page .az-atlas-switch button:hover {
    color: #fff;
    background: rgba(255, 255, 255, 0.06);
}

.about-page .az-atlas-switch button.is-active {
    color: #fff;
    border-color: var(--az-cyan-line);
    background: var(--az-cyan-soft);
}

.about-page .az-atlas-panel[hidden] {
    display: none;
}

.about-page .az-atlas-panel.is-active {
    animation: az-panel-in 0.28s ease;
}

@keyframes az-panel-in {
    from { opacity: 0; transform: translateY(6px); }
    to { opacity: 1; transform: translateY(0); }
}

.about-page .az-insights {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 28px;
    margin-top: 58px;
    padding-top: 30px;
    border-top: 1px solid var(--az-line);
}

.about-page .az-insight-no {
    font-family: "SF Mono", "JetBrains Mono", Menlo, monospace;
    font-size: 11px;
    letter-spacing: 0.12em;
    color: var(--az-cyan);
    margin-bottom: 12px;
}

.about-page .az-insights h3 {
    font-size: 15.5px;
    line-height: 1.65;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.86);
}

/* ============ 04 METHOD ============ */
.about-page .az-method {
    background: var(--az-ice);
}

.about-page .az-method-head {
    display: grid;
    grid-template-columns: 1.15fr 0.85fr;
    gap: 64px;
    align-items: end;
}

.about-page .az-method-aside .az-lead {
    margin-bottom: 22px;
}

.about-page .az-method-aside figure {
    margin: 0;
}

.about-page .az-method-aside img {
    width: 100%;
    aspect-ratio: 16 / 10;
    object-fit: cover;
    border-radius: 4px;
    filter: saturate(0.92);
}

.about-page .az-method-aside figcaption {
    margin-top: 10px;
    font-size: 12.5px;
    color: var(--n-600);
}

.about-page .az-method-track {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(6, minmax(0, 1fr));
    margin-top: 70px;
    padding: 0;
}

.about-page .az-method-step {
    position: relative;
    padding: 26px 14px 0 0;
    border-top: 2px solid var(--n-300);
    transition: border-color 0.22s ease;
}

.about-page .az-method-step:hover {
    border-top-color: var(--az-blue);
}

.about-page .az-method-dot {
    position: absolute;
    top: -6px;
    left: 0;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--az-blue);
}

.about-page .az-method-no {
    font-family: "SF Mono", "JetBrains Mono", Menlo, monospace;
    font-size: 11px;
    letter-spacing: 0.1em;
    color: var(--az-blue);
    margin-bottom: 8px;
}

.about-page .az-method-en {
    font-size: 10px;
    letter-spacing: 0.16em;
    color: var(--n-600);
    margin-bottom: 4px;
}

.about-page .az-method-step h3 {
    font-size: 22px;
    font-weight: 800;
    color: var(--n-950);
    margin-bottom: 10px;
}

.about-page .az-method-desc {
    font-size: 13.5px;
    line-height: 1.75;
    color: var(--n-700);
    min-height: 72px;
    padding-right: 8px;
}

.about-page .az-method-output {
    margin-top: 14px;
    font-size: 12px;
    line-height: 1.55;
    color: var(--n-700);
    background: var(--n-300);
    border: 1px solid #cfd4da;
    border-radius: 3px;
    padding: 8px 10px;
}

.about-page .az-method-output span {
    display: block;
    font-size: 9.5px;
    letter-spacing: 0.14em;
    color: var(--n-600);
    margin-bottom: 2px;
}

.about-page .az-method-flow {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px;
    margin-top: 38px;
    padding: 16px 20px;
    background: var(--az-ink);
    border-radius: 4px;
    color: rgba(255, 255, 255, 0.7);
    font-size: 12.5px;
    letter-spacing: 0.04em;
}

.about-page .az-method-flow span {
    color: rgba(255, 255, 255, 0.88);
}

.about-page .az-method-flow i {
    font-style: normal;
    color: var(--az-cyan);
}

.about-page .az-method .az-conclusion {
    margin-top: 46px;
}

.about-page .az-method .az-conclusion strong {
    color: var(--az-blue);
}

/* ============ 05 PRODUCTS ============ */
.about-page .az-products {
    background:
        radial-gradient(ellipse at 50% 0%, rgba(31, 80, 120, 0.22), transparent 58%),
        var(--az-ink-2);
}

.about-page .az-products-head {
    display: grid;
    grid-template-columns: 1.3fr 0.7fr;
    gap: 56px;
    align-items: end;
}

.about-page .az-products-head .az-lead {
    padding-bottom: 8px;
}

.about-page .az-product-flow {
    display: flex;
    align-items: center;
    gap: 0;
    margin-top: 46px;
    max-width: none;
    color: rgba(255, 255, 255, 0.42);
    font-size: 11px;
    letter-spacing: 0.24em;
}

.about-page .az-product-flow span {
    color: rgba(255, 255, 255, 0.72);
    white-space: nowrap;
}

.about-page .az-product-flow i {
    flex: 1;
    height: 1px;
    margin: 0 18px;
    background: linear-gradient(90deg, rgba(49, 223, 232, 0.45), rgba(49, 223, 232, 0.08));
    position: relative;
}

.about-page .az-product-flow i::after {
    content: "";
    position: absolute;
    right: 0;
    top: -3px;
    width: 7px;
    height: 7px;
    border-top: 1px solid var(--az-cyan);
    border-right: 1px solid var(--az-cyan);
    transform: rotate(45deg);
    opacity: 0.7;
}

.about-page .az-product-spine {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    margin-top: 18px;
    border: 1px solid var(--az-line);
    border-radius: 4px;
    overflow: hidden;
}

.about-page .az-product {
    display: flex;
    flex-direction: column;
    padding: 38px 30px 32px;
    border-right: 1px solid var(--az-line);
    background: rgba(255, 255, 255, 0.018);
    transition: background 0.24s ease;
}

.about-page .az-product:last-child {
    border-right: 0;
}

.about-page .az-product:hover {
    background: rgba(255, 255, 255, 0.045);
}

.about-page .az-product[data-tone="cyan"] { box-shadow: inset 0 2px 0 var(--az-cyan); }
.about-page .az-product[data-tone="blue"] { box-shadow: inset 0 2px 0 var(--az-blue); }
.about-page .az-product[data-tone="amber"] { box-shadow: inset 0 2px 0 var(--az-amber); }

.about-page .az-product-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 10px;
    margin-bottom: 26px;
    font-size: 9.5px;
    letter-spacing: 0.14em;
}

.about-page .az-product-code {
    color: rgba(231, 238, 246, 0.45);
}

.about-page .az-product-role {
    padding: 3px 8px;
    border: 1px solid var(--az-line-strong);
    border-radius: 2px;
    color: rgba(255, 255, 255, 0.72);
    white-space: nowrap;
}

.about-page .az-product h3 {
    font-size: clamp(1.7rem, 2.6vw, 2.15rem);
    font-weight: 800;
    letter-spacing: -0.02em;
    color: #fff;
    margin-bottom: 14px;
}

.about-page .az-product-question {
    font-size: 16px;
    font-weight: 600;
    line-height: 1.55;
    color: #fff;
    margin-bottom: 10px;
}

.about-page .az-product-work {
    font-size: 12.5px;
    line-height: 1.75;
    color: var(--az-muted);
    margin-bottom: 26px;
}

.about-page .az-product-work span {
    display: inline-block;
    margin-right: 8px;
    font-size: 9.5px;
    letter-spacing: 0.14em;
    color: rgba(231, 238, 246, 0.4);
}

.about-page .az-product-fit {
    margin-top: 24px;
    margin-bottom: 22px;
    padding-left: 10px;
    border-left: 2px solid var(--az-line-strong);
    font-size: 11.5px;
    line-height: 1.7;
    color: rgba(231, 238, 246, 0.52);
}

.about-page .az-product-label {
    color: rgba(231, 238, 246, 0.38);
    margin-bottom: 12px;
}

.about-page .az-product-gains {
    list-style: none;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px 14px;
    padding: 0;
    margin: 0 0 32px;
}

.about-page .az-product-gains li {
    position: relative;
    padding-left: 14px;
    font-size: 12.5px;
    line-height: 1.55;
    color: rgba(255, 255, 255, 0.78);
}

.about-page .az-product-gains li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 7px;
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: var(--az-cyan);
}

.about-page .az-product-link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    margin-top: auto;
    padding-top: 16px;
    border-top: 1px solid var(--az-line);
    font-size: 13px;
    font-weight: 600;
    color: #fff;
    text-decoration: none;
}

.about-page .az-product-link span {
    color: var(--az-cyan);
    transition: transform 0.2s ease;
}

.about-page .az-product-link:hover {
    color: var(--az-cyan);
    text-decoration: none;
}

.about-page .az-product-link:hover span {
    transform: translateX(4px);
}

.about-page .az-products-note {
    margin-top: 26px;
    font-size: 12.5px;
    line-height: 1.8;
    color: rgba(231, 238, 246, 0.46);
    border-left: 2px solid var(--az-line-strong);
    padding-left: 12px;
    max-width: 760px;
}

/* ============ 06 EVIDENCE ============ */
.about-page .az-evidence {
    background: #fff;
}

.about-page .az-evidence-figure {
    margin-top: 52px;
}

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

.about-page .az-evidence-head {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 56px;
    align-items: end;
}

.about-page .az-evidence-head .az-lead {
    padding-bottom: 6px;
}

.about-page .az-clients {
    margin-top: 42px;
    padding: 26px 28px 20px;
    border: 1px solid var(--n-300);
    border-radius: 4px;
    background: var(--n-50);
}

.about-page .az-clients-title {
    font-size: 10.5px;
    font-weight: 600;
    letter-spacing: 0.16em;
    color: var(--n-600);
    margin-bottom: 18px;
}

.about-page .az-client-row {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
}

.about-page .az-client {
    display: flex;
    align-items: center;
    gap: 14px;
}

.about-page .az-client img {
    flex: none;
    width: 66px;
    height: 40px;
    object-fit: contain;
    filter: grayscale(1);
    opacity: 0.7;
}

.about-page .az-client strong {
    display: block;
    font-size: 14.5px;
    font-weight: 700;
    color: var(--n-950);
}

.about-page .az-client span {
    display: block;
    margin-top: 2px;
    font-size: 12px;
    color: var(--n-600);
}

.about-page .az-clients-note {
    margin-top: 20px;
    padding-top: 14px;
    border-top: 1px solid var(--n-300);
    font-size: 11px;
    line-height: 1.7;
    color: var(--n-600);
}

.about-page .az-case-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    margin-top: 44px;
    border-bottom: 1px solid var(--n-300);
}

.about-page .az-case-tab {
    display: inline-flex;
    align-items: baseline;
    gap: 9px;
    padding: 14px 18px 13px;
    margin-bottom: -1px;
    font: inherit;
    font-size: 13.5px;
    font-weight: 600;
    color: var(--n-600);
    background: transparent;
    border: 0;
    border-bottom: 2px solid transparent;
    cursor: pointer;
    transition: color 0.18s ease, border-color 0.18s ease;
}

.about-page .az-case-tab span {
    font-family: "SF Mono", "JetBrains Mono", Menlo, monospace;
    font-size: 10px;
    letter-spacing: 0.1em;
    color: var(--n-500);
}

.about-page .az-case-tab:hover {
    color: var(--n-950);
}

.about-page .az-case-tab.is-active {
    color: var(--n-950);
    border-bottom-color: var(--az-blue);
}

.about-page .az-case-tab.is-active span {
    color: var(--az-blue);
}

.about-page .az-case-panel {
    padding-top: 34px;
}

.about-page .az-case-panel[hidden] {
    display: none;
}

.about-page .az-case-panel.is-active {
    animation: az-panel-in 0.26s ease;
}

.about-page .az-case-grid {
    display: grid;
    grid-template-columns: minmax(0, 0.96fr) minmax(0, 1.04fr);
    gap: 40px;
    align-items: start;
}

.about-page .az-case-media {
    position: relative;
    border-radius: 4px;
    overflow: hidden;
    background: var(--az-ink-2);
}

.about-page .az-case-media img {
    width: 100%;
    aspect-ratio: 16 / 10;
    object-fit: cover;
    filter: saturate(0.94);
}

.about-page .az-case-tag {
    position: absolute;
    left: 14px;
    top: 14px;
    padding: 6px 10px;
    background: rgba(7, 10, 15, 0.82);
    border: 1px solid rgba(255, 255, 255, 0.14);
    border-radius: 3px;
    font-size: 10.5px;
    letter-spacing: 0.1em;
    color: rgba(255, 255, 255, 0.86);
    backdrop-filter: blur(6px);
}

.about-page .az-case-matrix {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 14px;
    aspect-ratio: 16 / 10;
    padding: 28px;
    background:
        linear-gradient(rgba(148, 186, 214, 0.06) 1px, transparent 1px),
        linear-gradient(90deg, rgba(148, 186, 214, 0.06) 1px, transparent 1px),
        linear-gradient(150deg, #0c1420, #091018);
    background-size: 56px 56px, 56px 56px, 100% 100%;
}

.about-page .az-matrix-row {
    display: grid;
    grid-template-columns: 24px 1fr;
    align-items: center;
    gap: 4px 10px;
}

.about-page .az-matrix-row span {
    grid-row: 1 / 3;
    font-family: "SF Mono", "JetBrains Mono", Menlo, monospace;
    font-size: 10px;
    color: rgba(49, 223, 232, 0.55);
}

.about-page .az-matrix-row p {
    font-size: 12.5px;
    letter-spacing: 0.06em;
    color: rgba(255, 255, 255, 0.74);
}

.about-page .az-matrix-row i {
    display: block;
    height: 2px;
    background: linear-gradient(90deg, var(--az-cyan), rgba(49, 223, 232, 0.08));
    border-radius: 2px;
}

.about-page .az-case-body h3 {
    font-size: clamp(1.25rem, 2vw, 1.6rem);
    line-height: 1.45;
    font-weight: 700;
    color: var(--n-950);
    margin-bottom: 10px;
}

.about-page .az-case-summary {
    font-size: 13.5px;
    line-height: 1.75;
    color: var(--n-700);
    margin-bottom: 22px;
}

.about-page .az-chain {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1px;
    background: var(--n-300);
    border: 1px solid var(--n-300);
    border-radius: 4px;
    overflow: hidden;
}

.about-page .az-chain-item {
    background: var(--n-50);
    padding: 14px 16px;
}

.about-page .az-chain-k {
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.12em;
    color: var(--az-blue);
    margin-bottom: 6px;
}

.about-page .az-chain-v {
    font-size: 12.5px;
    line-height: 1.7;
    color: var(--n-700);
}

.about-page .az-metrics {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1px;
    margin-top: 18px;
    background: var(--az-line-strong);
    border: 1px solid var(--az-line-strong);
    border-radius: 4px;
    overflow: hidden;
}

.about-page .az-metrics div {
    background: var(--az-ink);
    padding: 18px 14px;
    text-align: center;
}

.about-page .az-metrics strong {
    display: block;
    font-size: 17px;
    font-weight: 800;
    color: var(--az-cyan);
    letter-spacing: -0.01em;
    margin-bottom: 4px;
}

.about-page .az-metrics span {
    font-size: 11px;
    color: rgba(255, 255, 255, 0.58);
}

.about-page .az-case-note {
    margin-top: 18px;
    font-size: 11.5px;
    line-height: 1.75;
    color: var(--n-600);
    border-left: 2px solid var(--n-300);
    padding-left: 10px;
}

/* ============ 07 ECOSYSTEM ============ */
.about-page .az-ecosystem {
    background:
        radial-gradient(ellipse at 12% 20%, rgba(31, 80, 120, 0.22), transparent 55%),
        var(--az-ink);
}

.about-page .az-eco-head {
    display: grid;
    grid-template-columns: 1.3fr 0.7fr;
    gap: 56px;
    align-items: end;
}

.about-page .az-eco-head .az-lead {
    padding-bottom: 6px;
}

.about-page .az-eco-grid {
    display: grid;
    grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
    gap: 56px;
    margin-top: 48px;
    align-items: center;
}

.about-page .az-eco-map-wrap {
    display: flex;
    align-items: center;
    justify-content: center;
}

.about-page .az-eco-map {
    display: block;
    width: 100%;
    max-width: 560px;
    height: auto;
}

.about-page .az-eco-orbit {
    fill: none;
    stroke: var(--az-line-strong);
    stroke-width: 1;
}

.about-page .az-eco-orbit-2 {
    stroke-dasharray: 4 8;
    opacity: 0.5;
}

.about-page .az-eco-spoke {
    stroke: rgba(49, 223, 232, 0.2);
    stroke-width: 1;
    stroke-dasharray: 5 5;
}

.about-page .az-eco-core circle {
    fill: rgba(49, 223, 232, 0.08);
    stroke: var(--az-cyan-line);
    stroke-width: 1;
}

.about-page .az-eco-core-en {
    fill: #fff;
    font-size: 13px;
    font-weight: 800;
    letter-spacing: 0.14em;
}

.about-page .az-eco-core-zh {
    fill: var(--az-cyan);
    font-size: 11px;
    letter-spacing: 0.12em;
}

.about-page .az-eco-node rect {
    fill: rgba(255, 255, 255, 0.035);
    stroke: var(--az-line-strong);
    stroke-width: 1;
    transition: fill 0.2s ease, stroke 0.2s ease;
}

.about-page .az-eco-node:hover rect {
    fill: rgba(49, 223, 232, 0.08);
    stroke: var(--az-cyan-line);
}

.about-page .az-eco-node-zh {
    fill: #fff;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.02em;
}

.about-page .az-eco-node-en {
    fill: rgba(231, 238, 246, 0.38);
    font-size: 8px;
    letter-spacing: 0.12em;
}

.about-page .az-eco-caps {
    display: flex;
    flex-direction: column;
}

.about-page .az-eco-cap {
    display: grid;
    grid-template-columns: 34px 1fr;
    gap: 14px;
    padding: 16px 0;
    border-top: 1px solid var(--az-line);
}

.about-page .az-eco-cap:last-child {
    border-bottom: 1px solid var(--az-line);
}

.about-page .az-eco-cap > p {
    font-family: "SF Mono", "JetBrains Mono", Menlo, monospace;
    font-size: 10px;
    color: var(--az-cyan);
    padding-top: 4px;
}

.about-page .az-eco-cap h3 {
    font-size: 15.5px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 3px;
}

.about-page .az-eco-cap span {
    font-size: 12.5px;
    line-height: 1.65;
    color: var(--az-muted);
}

.about-page .az-partners {
    margin-top: 28px;
}

.about-page .az-partners-title {
    font-size: 10.5px;
    letter-spacing: 0.16em;
    color: rgba(231, 238, 246, 0.4);
    margin-bottom: 10px;
}

.about-page .az-partner {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 10px 0;
    border-top: 1px solid var(--az-line);
}

.about-page .az-partner:last-of-type {
    border-bottom: 1px solid var(--az-line);
}

.about-page .az-partner-mark {
    flex: none;
    width: 34px;
    height: 34px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--az-line-strong);
    border-radius: 3px;
    font-size: 13px;
    font-weight: 700;
    color: var(--az-cyan);
    background: rgba(49, 223, 232, 0.05);
}

.about-page .az-partner strong {
    display: block;
    font-size: 14px;
    color: #fff;
    font-weight: 600;
}

.about-page .az-partner span:not(.az-partner-mark) {
    font-size: 11.5px;
    color: rgba(231, 238, 246, 0.48);
}

.about-page .az-partners-note {
    margin-top: 12px;
    font-size: 11px;
    line-height: 1.7;
    color: rgba(231, 238, 246, 0.36);
}

/* ============ 08 ACTION ============ */
.about-page .az-action {
    background:
        radial-gradient(ellipse at 84% 12%, rgba(49, 223, 232, 0.08), transparent 46%),
        linear-gradient(165deg, #0a121b 0%, #071014 58%, #091318 100%);
    color: var(--az-text);
    padding-bottom: 0;
}

.about-page .az-action .az-title {
    color: #fff;
}

.about-page .az-action .az-eyebrow {
    color: var(--az-cyan);
}

.about-page .az-action .az-lead {
    color: var(--az-muted);
}

.about-page .az-action-head {
    max-width: none;
}

.about-page .az-action-head .az-lead {
    margin-top: 22px;
}

.about-page .az-action-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
    margin-top: 52px;
}

.about-page .az-action-card {
    display: flex;
    flex-direction: column;
    padding: 30px 26px 26px;
    border: 1px solid var(--az-line);
    border-radius: 4px;
    background: rgba(255, 255, 255, 0.02);
    transition: border-color 0.24s ease, background 0.24s ease, transform 0.24s ease;
}

.about-page .az-action-card:hover {
    border-color: var(--az-cyan-line);
    background: rgba(49, 223, 232, 0.045);
    transform: translateY(-4px);
}

.about-page .az-action-no {
    font-family: "SF Mono", "JetBrains Mono", Menlo, monospace;
    font-size: 32px;
    font-weight: 700;
    line-height: 1;
    color: rgba(49, 223, 232, 0.3);
    margin-bottom: 16px;
}

.about-page .az-action-product {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.12em;
    color: var(--az-cyan);
    margin-bottom: 12px;
}

.about-page .az-action-product span {
    margin-left: 10px;
    font-weight: 400;
    letter-spacing: 0.06em;
    color: rgba(231, 238, 246, 0.42);
}

.about-page .az-action-card h3 {
    font-size: 18px;
    line-height: 1.55;
    font-weight: 700;
    color: #fff;
    margin-bottom: 12px;
}

.about-page .az-action-card > p:not(.az-action-no) {
    font-size: 13.5px;
    line-height: 1.75;
    color: var(--az-muted);
    margin-bottom: 26px;
}

.about-page .az-action-link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    margin-top: auto;
    padding-top: 16px;
    border-top: 1px solid var(--az-line);
    font-size: 13px;
    font-weight: 600;
    color: var(--az-cyan);
    text-decoration: none;
}

.about-page .az-action-link span {
    transition: transform 0.2s ease;
}

.about-page .az-action-link:hover {
    color: #fff;
    text-decoration: none;
}

.about-page .az-action-link:hover span {
    transform: translateX(4px);
}

.about-page .az-action-contact {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    margin-top: 46px;
    padding-top: 22px;
    border-top: 1px solid var(--az-line);
    font-size: 13.5px;
    color: rgba(255, 255, 255, 0.78);
}

.about-page .az-action-contact a {
    color: var(--az-cyan);
}

.about-page .az-action-contact .az-action-contact-label {
    margin-bottom: 6px;
    color: rgba(231, 238, 246, 0.4);
}

.about-page .az-action-back {
    font-size: 12.5px;
    color: rgba(255, 255, 255, 0.6) !important;
}

.about-page .az-action-back:hover {
    color: #fff !important;
}

.about-page .az-signoff {
    position: relative;
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 24px;
    margin-top: 64px;
    padding: 48px 0 42px;
    border-top: 1px solid var(--az-line);
    overflow: hidden;
}

.about-page .az-signoff-mark {
    font-size: clamp(2.2rem, 7.2vw, 5.6rem);
    font-weight: 800;
    line-height: 0.9;
    letter-spacing: 0.04em;
    color: transparent;
    -webkit-text-stroke: 1px rgba(49, 223, 232, 0.32);
    user-select: none;
    white-space: nowrap;
}

.about-page .az-signoff-copy {
    text-align: right;
    padding-bottom: 4px;
}

.about-page .az-signoff-name {
    font-size: 16px;
    font-weight: 700;
    color: #fff;
}

.about-page .az-signoff-cap {
    margin-top: 4px;
    font-size: 12px;
    letter-spacing: 0.1em;
    color: var(--az-cyan);
}

.about-page .az-signoff-slogan {
    margin-top: 10px;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.68);
}

/* ============ 滚动揭示（JS 可用时才隐藏内容） ============ */
html.js .about-page .az-reveal {
    opacity: 0;
    transform: translateY(18px);
    transition: opacity 0.65s ease, transform 0.65s ease;
}

html.js .about-page .az-reveal.is-in {
    opacity: 1;
    transform: none;
}

html.js .about-page .az-method-step {
    transition-delay: calc(var(--i, 0) * 70ms);
}

/* ============ 响应式 ============ */
@media (max-width: 1180px) {
    .about-page .az-method-head,
    .about-page .az-evidence-head,
    .about-page .az-future-head,
    .about-page .az-products-head,
    .about-page .az-eco-head { gap: 40px; }
    .about-page .az-case-grid { gap: 30px; }
    .about-page .az-eco-grid { gap: 36px; }
}

@media (max-width: 960px) {
    .about-page .az-section { padding: 80px 0; }

    .about-page .az-problem-figure { max-width: 100%; }
    .about-page .az-problem-list { grid-template-columns: repeat(2, minmax(0, 1fr)); margin-top: 8px; }
    .about-page .az-problem-item:nth-child(n + 4) { border-bottom: 0; }
    .about-page .az-problem-item:nth-child(n + 5) { border-bottom: 1px solid rgba(31, 35, 41, 0.13); }

    .about-page .az-problem-head,
    .about-page .az-method-head,
    .about-page .az-future-head,
    .about-page .az-products-head,
    .about-page .az-evidence-head,
    .about-page .az-brand-head,
    .about-page .az-eco-head { grid-template-columns: 1fr; gap: 24px; }

    .about-page .az-brand-tabs { grid-template-columns: minmax(180px, 232px) minmax(0, 1fr); gap: 32px; }
    .about-page .az-brand-tab { padding: 14px 14px 15px 18px; }
    .about-page .az-brand-figure { padding: 16px; }

    .about-page .az-client-row { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }

    .about-page .az-atlas { grid-template-columns: 1fr; gap: 30px; }
    .about-page .az-atlas-readout { padding-left: 0; border-left: 0; border-top: 1px solid var(--az-line); padding-top: 28px; }
    .about-page .az-atlas-panel { min-height: 0; }
    .about-page .az-atlas-switch { margin-top: 20px; }

    .about-page .az-insights { grid-template-columns: 1fr 1fr; gap: 24px; }

    .about-page .az-method-track { grid-template-columns: repeat(3, minmax(0, 1fr)); row-gap: 34px; }
    .about-page .az-method-step:nth-child(n + 4) { padding-top: 26px; }
    .about-page .az-method-desc { min-height: 0; }

    .about-page .az-product-spine { grid-template-columns: 1fr; }
    .about-page .az-product { border-right: 0; border-bottom: 1px solid var(--az-line); }
    .about-page .az-product:last-child { border-bottom: 0; }
    .about-page .az-product-desc { min-height: 0; }
    .about-page .az-product-gains { grid-template-columns: repeat(2, 1fr); max-width: 440px; }

    .about-page .az-case-grid { grid-template-columns: 1fr; }
    .about-page .az-case-media { max-width: 720px; }

    .about-page .az-eco-grid { grid-template-columns: 1fr; gap: 40px; }
    .about-page .az-eco-map { max-width: 440px; }

    .about-page .az-action-grid { grid-template-columns: 1fr; }
    .about-page .az-action-card > p:not(.az-action-no) { margin-bottom: 18px; }

    .about-page .az-signoff { flex-direction: column; align-items: flex-start; gap: 18px; }
    .about-page .az-signoff-copy { text-align: left; }
}

@media (max-width: 720px) {
    .about-page .az-section { padding: 64px 0; }

    .about-page .az-title { font-size: clamp(1.7rem, 7vw, 2.1rem); }
    .about-page .az-lead { font-size: 14.5px; }

    .about-page .az-hero { min-height: 0; }
    .about-page .az-hero-inner { padding: 76px 20px 84px; }
    .about-page .az-hero h1 { font-size: clamp(2.05rem, 9vw, 2.75rem); }
    .about-page .az-hero-sub { font-size: 14.5px; margin-bottom: 30px; }
    .about-page .az-hero-kicker { margin-bottom: 18px; font-size: 11.5px; }
    .about-page .az-hero-brand { margin-bottom: 30px; }
    .about-page .az-hero-facts { grid-template-columns: 1fr; gap: 14px; }
    .about-page .az-hero-scroll { display: none; }
    .about-page .az-hero-bg { opacity: 0.62; background-position: 68% center; }
    .about-page .az-hero::after { background: linear-gradient(180deg, rgba(6, 9, 14, 0.9) 0%, rgba(6, 9, 14, 0.72) 55%, var(--az-ink) 100%); }

    .about-page .az-hero-pos { margin-top: 8px; font-size: 1.15rem; letter-spacing: 0.1em; }
    .about-page .az-hero-statement { font-size: 15px; }

    .about-page .az-factory { grid-template-columns: 1fr; }
    .about-page .az-factory-port { padding: 26px 20px; }
    .about-page .az-factory-core { border: 0; border-top: 1px solid var(--n-300); border-bottom: 1px solid var(--n-300); padding: 28px 20px; }

    .about-page .az-architecture { grid-template-columns: 1fr; gap: 10px; }
    .about-page .az-architecture-arrow { transform: rotate(90deg); font-size: 18px; }
    .about-page .az-brand-tabs { grid-template-columns: 1fr; gap: 24px; margin-top: 38px; }
    .about-page .az-brand-tabs-nav { border-left: 0; }
    .about-page .az-brand-tab { padding: 14px 16px; }
    .about-page .az-brand-tab::before { left: 0; right: 0; top: auto; bottom: -1px; width: auto; height: 2px; }
    .about-page .az-brand-figure { padding: 14px; }

    .about-page .az-client-row { grid-template-columns: 1fr; gap: 16px; }
    .about-page .az-clients { margin-top: 32px; padding: 20px; }

    .about-page .az-problem-list { grid-template-columns: 1fr; margin-top: 32px; }
    .about-page .az-problem-item { grid-template-columns: 44px 1fr; gap: 10px; padding: 20px 0; }
    .about-page .az-problem-item:nth-child(n + 5) { border-bottom: 0; }
    .about-page .az-problem-item:last-child { border-bottom: 1px solid rgba(31, 35, 41, 0.13); }
    .about-page .az-problem-item h3 { font-size: 16px; }
    .about-page .az-problem-conclusion { padding: 20px; margin-top: 26px; }
    .about-page .az-problem-conclusion p { font-size: 15.5px; }

    /* 移动端能力图：放大关键文字、隐藏辅组英文，保持信息可读 */
    .about-page .az-atlas-visual { padding: 16px 12px 14px; }
    .about-page .az-atlas-toolbar { font-size: 9px; gap: 8px; }
    .about-page .az-atlas-hint { display: none; }
    .about-page .az-svg-label { font-size: 15px; letter-spacing: 0.06em; }
    .about-page .az-value-zh { font-size: 26px; }
    .about-page .az-value-en { display: none; }
    .about-page .az-stage-zh { font-size: 22px; }
    .about-page .az-stage-no { font-size: 13px; }
    .about-page .az-stage-en { display: none; }
    .about-page .az-core-zh { font-size: 30px; }
    .about-page .az-core-en { font-size: 12px; }
    .about-page .az-core-eq { font-size: 12px; }
    .about-page .az-atlas-equation { font-size: 11.5px; gap: 8px; }
    .about-page .az-atlas-switch button { flex: 1 1 28%; }

    .about-page .az-insights { grid-template-columns: 1fr; gap: 18px; }
    .about-page .az-insights h3 { font-size: 14.5px; }

    .about-page .az-method-track { grid-template-columns: 1fr 1fr; margin-top: 48px; }
    .about-page .az-method-step { padding-right: 16px; }
    .about-page .az-method-desc { font-size: 13px; }
    .about-page .az-method-flow { font-size: 11.5px; gap: 7px; padding: 14px 14px; }

    .about-page .az-product { padding: 28px 20px 24px; }
    .about-page .az-product-gains { grid-template-columns: 1fr 1fr; gap: 8px 10px; }
    .about-page .az-product-flow { font-size: 9.5px; }
    .about-page .az-product-flow i { margin: 0 10px; }

    .about-page .az-case-tabs { margin-top: 32px; }
    .about-page .az-case-tab { font-size: 12.5px; padding: 11px 10px; }
    .about-page .az-chain { grid-template-columns: 1fr; }
    .about-page .az-chain-item { padding: 12px 14px; }
    .about-page .az-metrics { grid-template-columns: 1fr; }
    .about-page .az-metrics div { text-align: left; padding: 14px 16px; }
    .about-page .az-case-matrix { aspect-ratio: 4 / 3; padding: 18px; }

    .about-page .az-eco-map { max-width: 340px; }
    .about-page .az-eco-node-zh { font-size: 15px; }
    .about-page .az-eco-node-en { display: none; }
    .about-page .az-eco-core-en { font-size: 14px; }
    .about-page .az-eco-core-zh { font-size: 13px; }

    .about-page .az-action-head .az-lead { margin-top: 16px; }
    .about-page .az-action-grid { margin-top: 36px; }
    .about-page .az-action-card { padding: 24px 20px; }
    .about-page .az-action-contact { flex-direction: column; align-items: flex-start; }
    .about-page .az-signoff { margin-top: 44px; padding: 32px 0 28px; }
    .about-page .az-signoff-mark { font-size: 3.4rem; }
}

@media (max-width: 480px) {
    .about-page .az-method-track { grid-template-columns: 1fr; row-gap: 26px; }
    .about-page .az-method-step h3 { font-size: 20px; }
    .about-page .az-product-gains { grid-template-columns: 1fr; }
    .about-page .az-case-tab { flex: 1 1 100%; justify-content: flex-start; }
    .about-page .az-eco-map { max-width: 300px; }
}

@media (prefers-reduced-motion: reduce) {
    .about-page .az-hero-scan,
    .about-page .az-hero-scroll svg { animation: none; }
    html.js .about-page .az-reveal {
        opacity: 1;
        transform: none;
        transition: none;
    }
    .about-page .az-atlas-panel.is-active,
    .about-page .az-case-panel.is-active { animation: none; }
}