/* =========================================================
   艾米格智慧互联 — HNAMG · AIoT
   AIoT 深色科技风（贴近 megvii.com 视觉范式）
   ========================================================= */

/* ---------- 0. Reset & Tokens ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
    margin: 0;
    font-family: 'Manrope', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: #0a1428;
    color: #ffffff;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; transition: color .2s ease; }
button { font-family: inherit; cursor: pointer; border: 0; background: transparent; color: inherit; }
ul { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4, p { margin: 0; }

:root {
    /* Color · 深色 AIoT 蓝 */
    --bg-0: #060d1f;
    --bg-1: #0a1428;
    --bg-2: #0f1c3a;
    --bg-3: #142850;
    --line: rgba(255, 255, 255, 0.08);
    --line-strong: rgba(255, 255, 255, 0.18);

    --text: #ffffff;
    --text-2: #c4d0e6;
    --text-3: #8a9bbd;
    --text-dim: #5d6f93;

    --brand: #1d6fff;
    --brand-2: #3a8bff;
    --brand-3: #6aa6ff;
    --brand-glow: rgba(29, 111, 255, 0.4);

    --cyan: #4ad7ff;
    --indigo: #7c83ff;
    --violet: #b56aff;
    --teal: #2bd1c1;
    --amber: #ffb547;

    /* Layout */
    --container: 1280px;
    --gutter: 32px;
    --section-py: 120px;

    /* Type */
    --font-sans: 'Manrope', 'Noto Sans SC', sans-serif;
    --font-mono: 'JetBrains Mono', ui-monospace, monospace;
}

.container {
    width: 100%;
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 var(--gutter);
    position: relative;
}

.skip-link {
    position: absolute; top: -100px; left: 0;
    background: var(--brand); color: #fff;
    padding: 8px 16px; z-index: 999;
}
.skip-link:focus { top: 0; }

/* ---------- 1. Section 通用 ---------- */
.section__head {
    display: flex; align-items: center; gap: 16px;
    margin-bottom: 24px;
    font-family: var(--font-mono);
    font-size: 13px;
    color: var(--text-3);
    text-transform: uppercase;
    letter-spacing: 0.12em;
}
.section__num { color: var(--brand-2); font-weight: 500; }
.section__label { color: var(--text-2); }

.section__title {
    font-size: clamp(36px, 5vw, 56px);
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.02em;
    margin-bottom: 24px;
    color: var(--text);
}
.section__title--accent {
    background: linear-gradient(120deg, var(--brand-2) 0%, var(--cyan) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.section__lead {
    font-size: 16px;
    line-height: 1.7;
    color: var(--text-2);
    max-width: 880px;
    margin-bottom: 64px;
}

/* ---------- 2. Buttons ---------- */
.btn {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 14px 28px;
    font-size: 15px; font-weight: 600;
    border-radius: 4px;
    transition: all .25s ease;
    white-space: nowrap;
    position: relative;
    overflow: hidden;
}
.btn--primary {
    background: var(--brand);
    color: #fff;
    box-shadow: 0 8px 24px -8px var(--brand-glow);
}
.btn--primary:hover {
    background: var(--brand-2);
    transform: translateY(-2px);
    box-shadow: 0 12px 32px -8px var(--brand-glow);
}
.btn--ghost {
    background: transparent;
    color: var(--text);
    border: 1px solid var(--line-strong);
}
.btn--ghost:hover {
    border-color: var(--brand-2);
    color: var(--brand-3);
    background: rgba(58, 139, 255, 0.08);
}

.chip {
    display: inline-block;
    padding: 6px 14px;
    background: rgba(58, 139, 255, 0.12);
    border: 1px solid rgba(58, 139, 255, 0.25);
    border-radius: 100px;
    font-size: 13px;
    color: var(--brand-3);
    font-weight: 500;
}

/* ---------- 3. Navigation ---------- */
.nav {
    position: fixed; top: 0; left: 0; right: 0;
    z-index: 100;
    padding: 0 var(--gutter);
    background: transparent;
    transition: all .3s ease;
}
.nav.is-scrolled {
    background: rgba(10, 20, 40, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--line);
}
.nav__inner {
    max-width: var(--container);
    margin: 0 auto;
    height: 72px;
    display: flex; align-items: center; gap: 32px;
}

.nav__brand {
    display: flex; align-items: center; gap: 10px;
    flex-shrink: 0;
}
.nav__mark {
    display: inline-flex; align-items: center; justify-content: center;
    width: 36px; height: 36px;
    background: linear-gradient(135deg, var(--brand), var(--brand-2));
    color: #fff;
    font-weight: 700; font-size: 18px;
    border-radius: 6px;
}
.nav__brand-text {
    display: flex; flex-direction: column; line-height: 1.1;
}
.nav__brand-cn { font-size: 16px; font-weight: 700; color: #fff; }
.nav__brand-en {
    font-size: 11px; font-weight: 500;
    color: var(--text-3);
    letter-spacing: 0.1em;
    font-family: var(--font-mono);
}

.nav__menu {
    display: flex; align-items: center; gap: 28px;
    margin-left: auto;
}
.nav__item {
    display: flex; flex-direction: column; align-items: center;
    line-height: 1.1;
    padding: 8px 0;
    color: var(--text-2);
    font-size: 15px; font-weight: 500;
    position: relative;
}
.nav__item:hover { color: #fff; }
.nav__item:hover::after {
    content: '';
    position: absolute; bottom: 0; left: 50%;
    width: 16px; height: 2px;
    background: var(--brand-2);
    transform: translateX(-50%);
}
.nav__en {
    font-size: 10px; color: var(--text-dim);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    font-family: var(--font-mono);
    margin-top: 2px;
}

.nav__right {
    display: flex; align-items: center; gap: 14px;
    font-size: 14px;
    color: var(--text-2);
    flex-shrink: 0;
}
.nav__phone {
    display: inline-flex; align-items: center; gap: 6px;
    color: var(--text);
    font-weight: 600;
    font-family: var(--font-mono);
}
.nav__phone:hover { color: var(--brand-3); }
.nav__divider { color: var(--text-dim); }
.nav__lang { color: var(--text-3); font-size: 13px; }
.nav__lang--active, .nav__lang:hover { color: var(--brand-3); }

.nav__toggle {
    display: none;
    width: 40px; height: 40px;
    flex-direction: column; justify-content: center; align-items: center; gap: 4px;
    margin-left: auto;
}
.nav__toggle-line {
    width: 20px; height: 2px;
    background: #fff;
    transition: all .3s ease;
}
.nav__mobile {
    display: none;
    position: absolute; top: 72px; left: 0; right: 0;
    background: rgba(10, 20, 40, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-top: 1px solid var(--line);
    padding: 16px var(--gutter);
    flex-direction: column; gap: 4px;
}
.nav__mobile a {
    display: block;
    padding: 14px 0;
    border-bottom: 1px solid var(--line);
    color: var(--text);
    font-size: 16px; font-weight: 500;
}
.nav__mobile a:last-child { border-bottom: 0; }
.nav__mobile-phone { color: var(--brand-3) !important; }

/* ---------- 4. Hero ---------- */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex; align-items: center;
    padding: 140px 0 100px;
    overflow: hidden;
}
.hero__bg {
    position: absolute; inset: 0;
    z-index: 0;
    background:
        radial-gradient(ellipse at 70% 30%, rgba(58, 139, 255, 0.18) 0%, transparent 50%),
        radial-gradient(ellipse at 20% 80%, rgba(74, 215, 255, 0.10) 0%, transparent 50%),
        linear-gradient(180deg, #060d1f 0%, #0a1428 100%);
}
.hero__grid {
    position: absolute; inset: 0;
    background-image:
        linear-gradient(rgba(58, 139, 255, 0.06) 1px, transparent 1px),
        linear-gradient(90deg, rgba(58, 139, 255, 0.06) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at center, #000 30%, transparent 80%);
    -webkit-mask-image: radial-gradient(ellipse at center, #000 30%, transparent 80%);
}
.hero__orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.5;
}
.hero__orb--1 {
    width: 480px; height: 480px;
    background: radial-gradient(circle, var(--brand), transparent 70%);
    top: -100px; right: -100px;
    opacity: 0.4;
}
.hero__orb--2 {
    width: 380px; height: 380px;
    background: radial-gradient(circle, var(--cyan), transparent 70%);
    bottom: -100px; left: -80px;
    opacity: 0.25;
}
.hero__rays {
    position: absolute; top: 50%; left: 50%;
    width: 1200px; height: 1200px;
    transform: translate(-50%, -50%);
    background: conic-gradient(
        from 0deg,
        transparent 0deg,
        rgba(58, 139, 255, 0.05) 20deg,
        transparent 40deg,
        transparent 360deg
    );
    animation: hero-rotate 60s linear infinite;
    pointer-events: none;
}
@keyframes hero-rotate {
    to { transform: translate(-50%, -50%) rotate(360deg); }
}

.hero__inner {
    position: relative; z-index: 1;
    width: 100%;
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 var(--gutter);
}

.hero__tag {
    display: inline-flex; align-items: center; gap: 10px;
    padding: 8px 16px;
    background: rgba(58, 139, 255, 0.10);
    border: 1px solid rgba(58, 139, 255, 0.25);
    border-radius: 100px;
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--brand-3);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin-bottom: 32px;
}
.hero__tag-dot {
    width: 6px; height: 6px;
    background: var(--brand-2);
    border-radius: 50%;
    box-shadow: 0 0 12px var(--brand-glow);
    animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.6; transform: scale(1.3); }
}

.hero__title {
    margin-bottom: 32px;
    line-height: 1.05;
    letter-spacing: -0.02em;
}
.hero__title-main {
    display: block;
    font-size: clamp(40px, 6vw, 80px);
    font-weight: 800;
    color: #fff;
    margin-bottom: 16px;
}
.hero__title-sub {
    display: block;
    font-size: clamp(20px, 2.5vw, 32px);
    font-weight: 500;
    color: var(--brand-3);
    font-family: var(--font-mono);
    letter-spacing: 0;
}

.hero__desc {
    font-size: clamp(15px, 1.2vw, 17px);
    line-height: 1.7;
    color: var(--text-2);
    max-width: 780px;
    margin-bottom: 40px;
}

.hero__cta {
    display: flex; gap: 16px; flex-wrap: wrap;
    margin-bottom: 40px;
}

.hero__chips {
    display: flex; flex-wrap: wrap; gap: 10px;
    margin-bottom: 60px;
}

.hero__scroll {
    position: absolute;
    bottom: 40px; left: var(--gutter);
    display: flex; flex-direction: column; align-items: center; gap: 12px;
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--text-3);
    letter-spacing: 0.2em;
    z-index: 1;
}
.hero__scroll-line {
    width: 1px; height: 60px;
    background: linear-gradient(180deg, var(--brand-2), transparent);
    position: relative;
    overflow: hidden;
}
.hero__scroll-line::after {
    content: '';
    position: absolute; top: -20px; left: 0;
    width: 100%; height: 20px;
    background: var(--brand-2);
    animation: scroll-down 2s ease-in-out infinite;
}
@keyframes scroll-down {
    to { transform: translateY(80px); }
}

/* ---------- 5. Products (AIoT) ---------- */
.products {
    padding: var(--section-py) 0;
    background:
        linear-gradient(180deg, #0a1428 0%, #0f1c3a 100%);
    position: relative;
}
.products__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.product-card {
    position: relative;
    padding: 32px 28px;
    background: linear-gradient(180deg, rgba(20, 40, 80, 0.4) 0%, rgba(10, 20, 40, 0.6) 100%);
    border: 1px solid var(--line);
    border-radius: 8px;
    transition: all .35s ease;
    overflow: hidden;
}
.product-card::before {
    content: '';
    position: absolute; top: 0; left: 0; right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--brand-2), transparent);
    opacity: 0;
    transition: opacity .35s ease;
}
.product-card:hover {
    border-color: rgba(58, 139, 255, 0.4);
    transform: translateY(-6px);
    box-shadow: 0 24px 60px -20px rgba(29, 111, 255, 0.3);
}
.product-card:hover::before { opacity: 1; }

.product-card__visual {
    display: flex; align-items: center; justify-content: center;
    width: 72px; height: 72px;
    border-radius: 8px;
    margin-bottom: 20px;
    background: rgba(58, 139, 255, 0.10);
    color: var(--brand-2);
    transition: all .35s ease;
}
.product-card__visual[data-color="cyan"] { background: rgba(74, 215, 255, 0.10); color: var(--cyan); }
.product-card__visual[data-color="blue"] { background: rgba(58, 139, 255, 0.10); color: var(--brand-2); }
.product-card__visual[data-color="indigo"] { background: rgba(124, 131, 255, 0.10); color: var(--indigo); }
.product-card__visual[data-color="violet"] { background: rgba(181, 106, 255, 0.10); color: var(--violet); }
.product-card__visual[data-color="teal"] { background: rgba(43, 209, 193, 0.10); color: var(--teal); }
.product-card__visual[data-color="amber"] { background: rgba(255, 181, 71, 0.10); color: var(--amber); }
.product-card:hover .product-card__visual { transform: scale(1.05); }

/* 产品族分组（A/B/C 三族） */
.product-group {
    margin-top: 64px;
}
.product-group:first-of-type { margin-top: 0; }
.product-group__head {
    display: flex; align-items: baseline; gap: 14px;
    padding-bottom: 20px;
    margin-bottom: 24px;
    border-bottom: 1px solid var(--line);
}
.product-group__num {
    display: inline-flex; align-items: center; justify-content: center;
    width: 36px; height: 36px;
    background: linear-gradient(135deg, var(--brand), var(--brand-2));
    color: #fff;
    font-weight: 700; font-family: var(--font-mono);
    font-size: 16px;
    border-radius: 6px;
    flex-shrink: 0;
}
.product-group__title {
    font-size: 22px; font-weight: 700;
    color: #fff;
    line-height: 1.2;
}
.product-group__en {
    margin-left: auto;
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--text-dim);
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.products__grid--5 {
    grid-template-columns: repeat(5, 1fr);
}
.products__grid--5 .product-card { padding: 24px 18px; }
.products__grid--5 .product-card__title { font-size: 17px; }
.products__grid--5 .product-card__desc { font-size: 13px; min-height: 80px; }
.product-card--wide {
    grid-column: span 2;
}

.product-card__tag {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--text-dim);
    letter-spacing: 0.15em;
    margin-bottom: 8px;
}
.product-card__title {
    font-size: 20px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 12px;
}
.product-card__desc {
    font-size: 14px;
    line-height: 1.65;
    color: var(--text-2);
    margin-bottom: 20px;
    min-height: 70px;
}
.product-card__arrow {
    display: inline-block;
    font-size: 13px;
    font-weight: 500;
    color: var(--brand-3);
    transition: transform .3s ease;
}
.product-card:hover .product-card__arrow { transform: translateX(4px); color: var(--brand-2); }

/* ---------- 6. Platform (双核) ---------- */
.platform {
    position: relative;
    padding: var(--section-py) 0;
    background:
        radial-gradient(ellipse at center, rgba(58, 139, 255, 0.08) 0%, transparent 60%),
        linear-gradient(180deg, #0f1c3a 0%, #0a1428 100%);
    overflow: hidden;
}
.platform__bg {
    position: absolute; inset: 0;
    background-image:
        linear-gradient(rgba(58, 139, 255, 0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(58, 139, 255, 0.04) 1px, transparent 1px);
    background-size: 40px 40px;
    mask-image: radial-gradient(ellipse at center, #000 20%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse at center, #000 20%, transparent 70%);
}

.platform__diagram {
    position: relative;
    width: 100%;
    max-width: 720px;
    aspect-ratio: 1.2 / 1;
    margin: 60px auto 50px;
}

.platform__core {
    position: absolute; top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    width: 280px; height: 280px;
}
.platform__ring {
    position: absolute; inset: 0;
    border-radius: 50%;
    border: 1px solid rgba(58, 139, 255, 0.2);
}
.platform__ring--1 {
    inset: 30px;
    border-color: rgba(58, 139, 255, 0.3);
    animation: ring-rotate 20s linear infinite;
}
.platform__ring--2 {
    inset: 60px;
    border-color: rgba(74, 215, 255, 0.3);
    border-style: dashed;
    animation: ring-rotate 30s linear infinite reverse;
}
.platform__ring--3 {
    inset: 0;
    background: radial-gradient(circle, rgba(58, 139, 255, 0.05) 0%, transparent 70%);
    animation: ring-pulse 4s ease-in-out infinite;
}
@keyframes ring-rotate { to { transform: rotate(360deg); } }
@keyframes ring-pulse {
    0%, 100% { transform: scale(1); opacity: 0.5; }
    50% { transform: scale(1.08); opacity: 0.8; }
}

.platform__center {
    position: absolute; top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    width: 140px; height: 140px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--brand) 0%, var(--brand-2) 50%, var(--cyan) 100%);
    display: flex; flex-direction: column; align-items: center; justify-content: center;
    color: #fff;
    box-shadow: 0 0 60px var(--brand-glow);
    z-index: 2;
}
.platform__center-cn {
    font-size: 22px; font-weight: 700;
    letter-spacing: 0.05em;
}
.platform__center-en {
    font-family: var(--font-mono);
    font-size: 10px;
    margin-top: 4px;
    letter-spacing: 0.15em;
    opacity: 0.85;
}

.platform__node {
    position: absolute;
    padding: 14px 18px;
    background: rgba(20, 40, 80, 0.7);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--line-strong);
    border-radius: 8px;
    min-width: 160px;
    z-index: 1;
    transition: all .3s ease;
}
.platform__node:hover {
    border-color: var(--brand-2);
    transform: scale(1.05);
    box-shadow: 0 8px 24px -8px var(--brand-glow);
}
.platform__node-tag {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 10px;
    color: var(--brand-3);
    letter-spacing: 0.12em;
    margin-bottom: 4px;
}
.platform__node h3 {
    font-size: 14px; font-weight: 600;
    color: #fff;
    margin-bottom: 2px;
}
.platform__node p {
    font-size: 12px;
    color: var(--text-3);
    line-height: 1.4;
}
.platform__node--tl { top: 5%;  left: 5%; }
.platform__node--tr { top: 5%;  right: 5%; }
.platform__node--bl { bottom: 5%; left: 5%; }
.platform__node--br { bottom: 5%; right: 5%; }
.platform__node--l  { top: 50%; left: 0%; transform: translateY(-50%); }
.platform__node--r  { top: 50%; right: 0%; transform: translateY(-50%); }
.platform__node--l:hover, .platform__node--r:hover { transform: translateY(-50%) scale(1.05); }

.platform__cta {
    text-align: center;
    margin-top: 30px;
}

/* ---------- 7. Industries (行业方案) ---------- */
.industries {
    padding: var(--section-py) 0;
    background: linear-gradient(180deg, #0a1428 0%, #0f1c3a 100%);
}
.industries__grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.industry-card {
    position: relative;
    padding: 40px 36px;
    background: linear-gradient(180deg, rgba(20, 40, 80, 0.4) 0%, rgba(10, 20, 40, 0.6) 100%);
    border: 1px solid var(--line);
    border-radius: 12px;
    transition: all .35s ease;
    overflow: hidden;
    min-height: 280px;
    display: flex; flex-direction: column;
}
.industry-card:hover {
    border-color: rgba(58, 139, 255, 0.35);
    transform: translateY(-4px);
    box-shadow: 0 24px 60px -20px rgba(29, 111, 255, 0.25);
}
.industry-card__num {
    font-family: var(--font-mono);
    font-size: 13px;
    color: var(--brand-3);
    letter-spacing: 0.1em;
    margin-bottom: 16px;
}
.industry-card__title {
    font-size: 28px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 16px;
    line-height: 1.2;
}
.industry-card__desc {
    font-size: 14px;
    line-height: 1.7;
    color: var(--text-2);
    margin-bottom: 20px;
    flex: 1;
}
.industry-card__list {
    display: flex; flex-wrap: wrap; gap: 8px;
    margin-bottom: 24px;
}
.industry-card__list li {
    padding: 4px 12px;
    background: rgba(58, 139, 255, 0.10);
    border: 1px solid rgba(58, 139, 255, 0.20);
    border-radius: 4px;
    font-size: 12px;
    color: var(--brand-3);
    font-family: var(--font-mono);
}
.industry-card__visual {
    position: absolute;
    bottom: 24px; right: 24px;
    width: 120px; height: 70px;
    color: var(--brand-2);
    opacity: 0.7;
}

/* ---------- 8. Developers ---------- */
.dev {
    padding: var(--section-py) 0;
    background:
        linear-gradient(180deg, #0f1c3a 0%, #0a1428 100%);
}
.dev__grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 80px;
    align-items: center;
}
.dev__lead {
    font-size: 16px;
    line-height: 1.7;
    color: var(--text-2);
    margin-bottom: 32px;
    margin-top: 24px;
}
.dev__cards {
    display: grid;
    gap: 16px;
}
.dev-card {
    padding: 24px 28px;
    background: rgba(20, 40, 80, 0.4);
    border: 1px solid var(--line);
    border-radius: 8px;
    transition: all .3s ease;
}
.dev-card:hover {
    border-color: var(--brand-2);
    background: rgba(20, 40, 80, 0.6);
}
.dev-card__tag {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--brand-3);
    letter-spacing: 0.12em;
    margin-bottom: 8px;
}
.dev-card h3 {
    font-size: 18px; font-weight: 600;
    color: #fff;
    margin-bottom: 8px;
}
.dev-card p {
    font-size: 14px;
    line-height: 1.6;
    color: var(--text-2);
}

/* ---------- 9. About ---------- */
.about {
    padding: var(--section-py) 0;
    background:
        radial-gradient(ellipse at 80% 20%, rgba(58, 139, 255, 0.05) 0%, transparent 50%),
        #0a1428;
}
.about__grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 80px;
    align-items: start;
}
.about__title {
    font-size: clamp(36px, 4.5vw, 56px);
    font-weight: 700;
    line-height: 1.1;
    color: #fff;
    margin-bottom: 32px;
}
.about__title--accent {
    background: linear-gradient(120deg, var(--brand-2), var(--cyan));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    display: block;
}
.about__lead {
    font-size: 17px;
    line-height: 1.75;
    color: var(--text-2);
    margin-bottom: 24px;
}
.about__hl { color: var(--brand-3); font-weight: 600; }
.about__text {
    font-size: 15px;
    line-height: 1.75;
    color: var(--text-3);
    margin-bottom: 16px;
}
.about__text em { color: var(--text-2); font-style: normal; font-weight: 500; }

.about__stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-top: 48px;
    padding-top: 32px;
    border-top: 1px solid var(--line);
}
.stat {
    display: flex; flex-direction: column; gap: 6px;
}
.stat__num {
    font-size: 32px;
    font-weight: 700;
    color: var(--brand-3);
    font-family: var(--font-mono);
    letter-spacing: -0.02em;
}
.stat__label {
    font-size: 12px;
    color: var(--text-3);
    letter-spacing: 0.05em;
}

.about__side {
    display: flex; flex-direction: column; gap: 16px;
}
.about__side-card {
    padding: 24px 28px;
    background: linear-gradient(180deg, rgba(20, 40, 80, 0.4) 0%, rgba(10, 20, 40, 0.6) 100%);
    border: 1px solid var(--line);
    border-radius: 8px;
}
.about__side-num {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--brand-3);
    letter-spacing: 0.15em;
    margin-bottom: 12px;
}
.about__side-card p {
    font-size: 15px;
    line-height: 1.6;
    color: var(--text-2);
}

/* ---------- 10. News ---------- */
.news {
    padding: var(--section-py) 0;
    background: linear-gradient(180deg, #0a1428 0%, #0f1c3a 100%);
}
.news__head {
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: end;
    gap: 40px;
    margin-bottom: 60px;
}
.news__head .section__title {
    margin-bottom: 0;
    text-align: right;
}
.news__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.news-card {
    display: flex; flex-direction: column;
    padding: 32px 28px;
    background: linear-gradient(180deg, rgba(20, 40, 80, 0.4) 0%, rgba(10, 20, 40, 0.6) 100%);
    border: 1px solid var(--line);
    border-radius: 8px;
    transition: all .35s ease;
    min-height: 280px;
}
.news-card:hover {
    border-color: rgba(58, 139, 255, 0.35);
    transform: translateY(-4px);
}
.news-card__date {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--brand-3);
    letter-spacing: 0.1em;
    margin-bottom: 12px;
}
.news-card__cat {
    display: inline-block;
    align-self: flex-start;
    padding: 4px 10px;
    background: rgba(58, 139, 255, 0.10);
    border: 1px solid rgba(58, 139, 255, 0.20);
    border-radius: 4px;
    font-size: 12px;
    color: var(--brand-3);
    margin-bottom: 16px;
    font-family: var(--font-mono);
}
.news-card__title {
    font-size: 19px;
    font-weight: 600;
    line-height: 1.4;
    color: #fff;
    margin-bottom: 14px;
}
.news-card__desc {
    font-size: 14px;
    line-height: 1.7;
    color: var(--text-3);
    flex: 1;
    margin-bottom: 20px;
}
.news-card__link {
    display: inline-flex; align-items: center; gap: 6px;
    font-size: 14px;
    color: var(--brand-3);
    font-weight: 500;
}
.news-card__link:hover { color: var(--brand-2); }
.news-card__link:hover svg { transform: translateX(4px); }
.news-card__link svg { transition: transform .3s ease; }

/* ---------- 11. Contact CTA ---------- */
.contact {
    position: relative;
    padding: 120px 0;
    background:
        linear-gradient(135deg, #0a2658 0%, #0a1428 50%, #050a18 100%);
    overflow: hidden;
}
.contact__bg {
    position: absolute; inset: 0;
    z-index: 0;
}
.contact__grid {
    position: absolute; inset: 0;
    background-image:
        linear-gradient(rgba(74, 215, 255, 0.08) 1px, transparent 1px),
        linear-gradient(90deg, rgba(74, 215, 255, 0.08) 1px, transparent 1px);
    background-size: 40px 40px;
    mask-image: radial-gradient(ellipse at center, #000 30%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse at center, #000 30%, transparent 70%);
}
.contact__pin {
    position: absolute;
    left: var(--x); top: var(--y);
    transform: translate(-50%, -50%);
}
.contact__pin-dot {
    position: absolute; top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    width: 10px; height: 10px;
    background: var(--cyan);
    border-radius: 50%;
    box-shadow: 0 0 16px var(--cyan);
}
.contact__pin-ring {
    position: absolute; top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    width: 40px; height: 40px;
    border: 1px solid var(--cyan);
    border-radius: 50%;
    opacity: 0.6;
    animation: pin-pulse 3s ease-in-out infinite;
}
.contact__pin--alt .contact__pin-ring {
    width: 30px; height: 30px;
    opacity: 0.4;
    animation-delay: 1.5s;
}
@keyframes pin-pulse {
    0% { transform: translate(-50%, -50%) scale(0.8); opacity: 0.8; }
    100% { transform: translate(-50%, -50%) scale(2.5); opacity: 0; }
}

.contact__inner {
    position: relative; z-index: 1;
    max-width: 720px;
}
.contact__label {
    display: inline-block;
    margin-bottom: 24px;
    padding: 6px 14px;
    background: rgba(74, 215, 255, 0.10);
    border: 1px solid rgba(74, 215, 255, 0.25);
    border-radius: 100px;
    color: var(--cyan);
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 0.1em;
}
.contact__title {
    font-size: clamp(40px, 5.5vw, 64px);
    font-weight: 700;
    line-height: 1.1;
    color: #fff;
    margin-bottom: 24px;
    letter-spacing: -0.02em;
}
.contact__title--accent {
    background: linear-gradient(120deg, var(--cyan) 0%, var(--brand-3) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}
.contact__desc {
    font-size: 16px;
    line-height: 1.7;
    color: var(--text-2);
    margin-bottom: 40px;
    max-width: 560px;
}
.contact__actions {
    display: flex; gap: 16px; flex-wrap: wrap;
}

/* ---------- 11.5 Partners (合作伙伴) ---------- */
.partners {
    padding: var(--section-py) 0;
    background:
        radial-gradient(ellipse at 20% 80%, rgba(58, 139, 255, 0.06) 0%, transparent 50%),
        linear-gradient(180deg, #0f1c3a 0%, #0a1428 100%);
}
.partners__featured {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 32px;
    align-items: start;
}
.partners__feature-card {
    padding: 40px 36px;
    background: linear-gradient(180deg, rgba(20, 40, 80, 0.5) 0%, rgba(10, 20, 40, 0.7) 100%);
    border: 1px solid rgba(58, 139, 255, 0.25);
    border-radius: 12px;
    position: relative;
    overflow: hidden;
}
.partners__feature-card::before {
    content: '';
    position: absolute; top: 0; left: 0; right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--brand-2), transparent);
}
.partners__badge {
    display: inline-block;
    padding: 4px 12px;
    background: rgba(58, 139, 255, 0.18);
    border: 1px solid rgba(58, 139, 255, 0.4);
    border-radius: 100px;
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--brand-3);
    letter-spacing: 0.12em;
    margin-bottom: 24px;
}
.partners__feature-head {
    display: flex; align-items: center; gap: 18px;
    margin-bottom: 24px;
}
.partners__feature-mark {
    display: inline-flex; align-items: center; justify-content: center;
    width: 56px; height: 56px;
    background: linear-gradient(135deg, #c8102e, #ff4b5c);
    color: #fff;
    font-size: 26px; font-weight: 700;
    border-radius: 8px;
    flex-shrink: 0;
}
.partners__feature-name {
    font-size: 26px; font-weight: 700;
    color: #fff;
    margin-bottom: 4px;
}
.partners__feature-meta {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--text-3);
    letter-spacing: 0.05em;
}
.partners__feature-desc {
    font-size: 15px;
    line-height: 1.7;
    color: var(--text-2);
    margin-bottom: 24px;
}
.partners__feature-tags {
    display: flex; flex-wrap: wrap; gap: 8px;
}
.partners__feature-tags li {
    padding: 5px 12px;
    background: rgba(58, 139, 255, 0.10);
    border: 1px solid rgba(58, 139, 255, 0.22);
    border-radius: 4px;
    font-size: 12px;
    color: var(--brand-3);
    font-family: var(--font-mono);
}

.partners__ship {
    padding: 32px 28px;
    background: rgba(20, 40, 80, 0.35);
    border: 1px solid var(--line);
    border-radius: 12px;
}
.partners__ship-title {
    font-size: 18px; font-weight: 600;
    color: #fff;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--line);
}
.partners__ship-desc {
    font-size: 14px;
    line-height: 1.7;
    color: var(--text-2);
    margin-bottom: 24px;
}
.partners__stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}
.partners__stat {
    padding: 16px;
    background: rgba(10, 20, 40, 0.6);
    border: 1px solid var(--line);
    border-radius: 6px;
    display: flex; flex-direction: column; gap: 4px;
}
.partners__stat-num {
    font-size: 24px;
    font-weight: 700;
    color: var(--brand-3);
    font-family: var(--font-mono);
}
.partners__stat-num small {
    font-size: 14px;
    color: var(--text-3);
    margin-left: 2px;
}
.partners__stat-label {
    font-size: 12px;
    color: var(--text-3);
}

/* ---------- 11.6 Cases (案例展示) ---------- */
.cases {
    padding: var(--section-py) 0;
    background: linear-gradient(180deg, #0a1428 0%, #0f1c3a 100%);
}
.cases__grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}
.case-card {
    position: relative;
    background: linear-gradient(180deg, rgba(20, 40, 80, 0.4) 0%, rgba(10, 20, 40, 0.6) 100%);
    border: 1px solid var(--line);
    border-radius: 12px;
    overflow: hidden;
    transition: all .35s ease;
    min-height: 320px;
    display: flex; flex-direction: column;
}
.case-card:hover {
    border-color: rgba(58, 139, 255, 0.4);
    transform: translateY(-4px);
    box-shadow: 0 24px 60px -20px rgba(29, 111, 255, 0.3);
}
.case-card__bg {
    width: 100%;
    height: 120px;
    color: var(--brand-2);
    background: linear-gradient(135deg, rgba(58, 139, 255, 0.10), rgba(74, 215, 255, 0.05));
    border-bottom: 1px solid var(--line);
}
.case-card__bg svg { width: 100%; height: 100%; }
.case-card__body {
    padding: 28px 32px 32px;
    flex: 1;
    display: flex; flex-direction: column;
}
.case-card__cat {
    display: inline-block;
    align-self: flex-start;
    padding: 4px 12px;
    background: rgba(58, 139, 255, 0.10);
    border: 1px solid rgba(58, 139, 255, 0.22);
    border-radius: 4px;
    font-size: 12px;
    color: var(--brand-3);
    font-family: var(--font-mono);
    margin-bottom: 16px;
}
.case-card__title {
    font-size: 22px; font-weight: 700;
    color: #fff;
    line-height: 1.3;
    margin-bottom: 14px;
}
.case-card__desc {
    font-size: 14px;
    line-height: 1.7;
    color: var(--text-2);
    flex: 1;
    margin-bottom: 18px;
}
.case-card__tags {
    display: flex; flex-wrap: wrap; gap: 8px;
}
.case-card__tags li {
    padding: 4px 10px;
    background: rgba(58, 139, 255, 0.08);
    border: 1px solid var(--line);
    border-radius: 4px;
    font-size: 12px;
    color: var(--text-2);
}

/* ---------- 11.7 About 扩展：资质 / 办公分布 / 4 大优势 ---------- */
.about__sub {
    font-family: var(--font-mono);
    font-size: 13px;
    color: var(--brand-3);
    letter-spacing: 0.1em;
    margin-top: 48px;
    margin-bottom: 16px;
    padding-top: 24px;
    border-top: 1px solid var(--line);
}
.about__certs { margin-top: 8px; }
.cert-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
}
.cert-card {
    padding: 18px 16px;
    background: rgba(20, 40, 80, 0.4);
    border: 1px solid var(--line);
    border-radius: 6px;
    display: flex; flex-direction: column; gap: 6px;
    transition: all .25s ease;
}
.cert-card:hover {
    border-color: rgba(58, 139, 255, 0.35);
    background: rgba(20, 40, 80, 0.6);
}
.cert-card__name {
    font-size: 15px; font-weight: 700;
    color: #fff;
    font-family: var(--font-mono);
}
.cert-card__desc {
    font-size: 12px;
    color: var(--text-3);
}

.offices-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
}
.office-card {
    padding: 20px 18px;
    background: rgba(20, 40, 80, 0.4);
    border: 1px solid var(--line);
    border-radius: 6px;
    display: flex; flex-direction: column; gap: 6px;
    transition: all .25s ease;
}
.office-card:hover {
    border-color: rgba(58, 139, 255, 0.35);
}
.office-card__city {
    font-size: 18px; font-weight: 700;
    color: #fff;
}
.office-card__role {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--brand-3);
    letter-spacing: 0.08em;
}
.office-card__detail {
    font-size: 12px;
    color: var(--text-3);
    line-height: 1.5;
    margin-top: 4px;
}

.about__side-card--accent {
    background: linear-gradient(180deg, rgba(29, 111, 255, 0.18) 0%, rgba(10, 20, 40, 0.7) 100%);
    border-color: rgba(58, 139, 255, 0.3);
}
.about__side-list {
    display: flex; flex-direction: column; gap: 10px;
}
.about__side-list li {
    font-size: 13px;
    line-height: 1.55;
    color: var(--text-2);
}
.about__side-list b {
    color: var(--brand-3);
    font-weight: 600;
    margin-right: 4px;
}

.stat__num small {
    font-size: 18px;
    color: var(--text-3);
    font-weight: 500;
    margin-left: 2px;
}

/* ---------- 12. Footer ---------- */
.footer {
    background: #060d1f;
    border-top: 1px solid var(--line);
    padding: 80px 0 32px;
}
.footer__top {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 60px;
    padding-bottom: 60px;
    border-bottom: 1px solid var(--line);
}
.footer__brand {
    display: flex; align-items: flex-start; gap: 14px;
}
.footer__mark {
    display: inline-flex; align-items: center; justify-content: center;
    width: 40px; height: 40px;
    background: linear-gradient(135deg, var(--brand), var(--brand-2));
    color: #fff;
    font-weight: 700; font-size: 20px;
    border-radius: 6px;
    flex-shrink: 0;
}
.footer__brand-cn {
    font-size: 16px; font-weight: 700;
    color: #fff;
    margin-bottom: 6px;
}
.footer__brand-en {
    font-size: 11px;
    color: var(--text-3);
    letter-spacing: 0.05em;
    font-family: var(--font-mono);
    line-height: 1.4;
    max-width: 280px;
}

.footer__cols {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
}
.footer__col h4 {
    font-size: 14px;
    font-weight: 600;
    color: #fff;
    margin-bottom: 16px;
}
.footer__col a, .footer__col p {
    display: block;
    font-size: 13px;
    line-height: 1.7;
    color: var(--text-3);
    margin-bottom: 6px;
    transition: color .2s ease;
}
.footer__col a:hover { color: var(--brand-3); }
.footer__col a[href^="tel:"] { color: var(--text-2); font-family: var(--font-mono); }

.footer__bottom {
    display: flex; justify-content: space-between; align-items: center;
    padding-top: 32px;
    flex-wrap: wrap;
    gap: 16px;
}
.footer__legal {
    display: flex; align-items: center; gap: 12px;
    flex-wrap: wrap;
}
.beian {
    display: inline-flex; align-items: center; gap: 6px;
    font-size: 12px;
    color: var(--text-3);
    transition: color .2s ease;
}
.beian:hover { color: var(--text-2); }
.beian__icon { font-size: 14px; }
.footer__divider { color: var(--text-dim); }
.footer__copy {
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--text-dim);
    letter-spacing: 0.08em;
}

/* ---------- 13. Back to Top ---------- */
.to-top {
    position: fixed;
    bottom: 32px; right: 32px;
    width: 48px; height: 48px;
    border-radius: 50%;
    background: rgba(20, 40, 80, 0.9);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--line-strong);
    color: var(--brand-3);
    display: flex; align-items: center; justify-content: center;
    z-index: 50;
    opacity: 0;
    transform: translateY(20px);
    pointer-events: none;
    transition: all .3s ease;
}
.to-top.is-visible {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}
.to-top:hover {
    background: var(--brand);
    color: #fff;
    transform: translateY(-4px);
}

/* ---------- 14. 响应式 ---------- */
@media (max-width: 1024px) {
    .nav__menu, .nav__right { display: none; }
    .nav__toggle { display: flex; }
    .nav__mobile.is-open { display: flex; }

    .products__grid, .news__grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .products__grid--5 { grid-template-columns: repeat(3, 1fr); }
    .product-card--wide { grid-column: span 2; }
    .industries__grid, .cases__grid {
        grid-template-columns: 1fr;
    }
    .industry-card--wide { grid-column: auto; }
    .dev__grid, .about__grid {
        grid-template-columns: 1fr;
        gap: 48px;
    }
    .partners__featured {
        grid-template-columns: 1fr;
    }
    .cert-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .offices-grid {
        grid-template-columns: 1fr;
    }
    .footer__top {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    .footer__cols {
        grid-template-columns: repeat(2, 1fr);
    }

    .about__stats {
        grid-template-columns: repeat(2, 1fr);
    }

    .platform__diagram {
        max-width: 560px;
    }
    .platform__node { min-width: 130px; }
    .platform__node h3 { font-size: 13px; }
    .platform__node p { display: none; }

    .product-group__en { display: none; }
}

@media (max-width: 640px) {
    :root {
        --gutter: 20px;
        --section-py: 80px;
    }
    .nav__inner { height: 60px; }
    .nav__mobile { top: 60px; }
    .hero { padding: 100px 0 60px; min-height: auto; }
    .hero__chips { margin-bottom: 30px; }
    .hero__scroll { display: none; }
    .news__head {
        grid-template-columns: 1fr;
    }
    .news__head .section__title { text-align: left; }
    .products__grid, .news__grid {
        grid-template-columns: 1fr;
    }
    .products__grid--5 { grid-template-columns: 1fr; }
    .product-card--wide { grid-column: auto; }
    .footer__cols {
        grid-template-columns: 1fr;
        gap: 28px;
    }
    .footer__bottom {
        flex-direction: column;
        align-items: flex-start;
    }
    .about__stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }
    .stat__num { font-size: 24px; }
    .platform__diagram {
        max-width: 360px;
        aspect-ratio: 1;
    }
    .platform__core { width: 180px; height: 180px; }
    .platform__center { width: 90px; height: 90px; }
    .platform__center-cn { font-size: 16px; }
    .platform__node {
        position: relative;
        top: auto !important; left: auto !important; right: auto !important; bottom: auto !important;
        transform: none !important;
    }
    .platform__diagram {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 12px;
        aspect-ratio: auto;
    }
    .platform__core { position: relative; top: auto; left: auto; transform: none; grid-column: 1 / -1; margin: 0 auto; }

    .product-group { margin-top: 48px; }
    .product-group__head { flex-wrap: wrap; gap: 10px; }
    .product-group__title { font-size: 18px; }
    .partners__feature-card { padding: 28px 20px; }
    .partners__feature-head { gap: 12px; }
    .partners__feature-mark { width: 44px; height: 44px; font-size: 22px; }
    .partners__feature-name { font-size: 22px; }
    .partners__stats { grid-template-columns: 1fr; }
    .cert-grid { grid-template-columns: 1fr; }
    .case-card { min-height: auto; }
}

/* ---------- 15. Reveal 动画 ---------- */
.reveal {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity .8s ease, transform .8s ease;
}
.reveal.is-visible {
    opacity: 1;
    transform: translateY(0);
}