:root {
    --brand: #7B292B;
    --brand-light: #A33A3C;
    --brand-dark: #5A1E20;
    --bg: #f2f4f8;
    --bg-light: #ffffff;
    --bg-card: #ffffff;
    --bg-dark: #1a1e2b;
    --bg-dark-light: #222736;
    --text: #1a1e2b;
    --text-light: #ffffff;
    --text-muted: rgba(26, 30, 43, 0.55);
    --text-dim: rgba(26, 30, 43, 0.35);
    --text-muted-light: rgba(255, 255, 255, 0.6);
    --text-dim-light: rgba(255, 255, 255, 0.35);
    --border: rgba(0, 0, 0, 0.07);
    --border-light: rgba(255, 255, 255, 0.1);
    --success: #00D4AA;
    --fm: 'Alibaba PuHuiTi', 'PingFang SC', 'Noto Sans SC', 'Microsoft YaHei', -apple-system, BlinkMacSystemFont, sans-serif;
    --fd: 'Alibaba PuHuiTi', 'Space Grotesk', 'Inter', sans-serif;
}
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
html {
    scroll-behavior: smooth;
    font-size: 16px;
}
body {
    font-family: var(--fm);
    background: var(--bg);
    color: var(--text);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}
/* Noise */
.noise {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 9999;
    opacity: 0.025;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 512 512' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
    transform: translateZ(0);
    backface-visibility: hidden;
}
/* Scrollbar */
::-webkit-scrollbar {
    width: 6px;
}
::-webkit-scrollbar-track {
    background: #e8eaf0;
}
::-webkit-scrollbar-thumb {
    background: rgba(0, 0, 0, 0.18);
    border-radius: 3px;
}
/* Preloader - Simplified */
#preloader {
    position: fixed;
    inset: 0;
    background: var(--bg-dark);
    z-index: 10000;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}
#preloader.done {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}
.pl-logo {
    width: 136px;
    height: 56px;
    opacity: 1;
    margin-bottom: 20px;
}
.pl-brand {
    font-size: 18px;
    font-weight: 700;
    letter-spacing: 0.08em;
    color: #fff;
    opacity: 1;
}
.pl-sub {
    font-size: 12px;
    font-weight: 400;
    color: var(--text-muted-light);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    margin-top: 8px;
    opacity: 1;
}
.pl-skip {
    margin-top: 24px;
    font-size: 12px;
    color: rgba(255, 255, 255, 0.35);
    cursor: pointer;
    transition: color 0.3s;
    background: none;
    border: 1px solid rgba(255, 255, 255, 0.15);
    padding: 6px 16px;
    border-radius: 4px;
}
.pl-skip:hover {
    color: rgba(255, 255, 255, 0.7);
    border-color: rgba(255, 255, 255, 0.35);
}
/* Glows */
.glow {
    position: absolute;
    border-radius: 50%;
    pointer-events: none;
    filter: blur(80px);
    transform: translateZ(0);
}
.glow-brand {
    background: radial-gradient(circle, rgba(123, 41, 43, 0.12) 0%, transparent 70%);
}
/* Grid texture */
.grid-tex {
    background-image: linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px), linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
}
/* Container */
.c {
    max-width: 1360px;
    margin: 0 auto;
    padding: 0 48px;
}
/* ========== HERO REDESIGN ========== */
.hero {
    position: relative;
    height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
    background: #080c14;
    isolation: isolate;
    contain: layout style paint;
}
.bg-video {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: 0;
    opacity: 0.9;
    will-change: transform, opacity;
    transform: translateZ(0);
    pointer-events: none;
}
.video-overlay {
    position: absolute;
    inset: 0;
    z-index: 1;
    background: linear-gradient(180deg, rgba(8, 12, 20, 0.12) 20%, rgba(8, 12, 20, 0.65) 100%);
}
.hero-inner {
    position: relative;
    z-index: 10;
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 120px 0 160px;
    will-change: transform, opacity;
}
/* rot viewport & layers */
.rot-viewport {
    position: relative;
    width: 100%;
    max-width: 1000px;
    height: auto;
    min-height: 260px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
}
.rot-layer {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    pointer-events: none;
}
.rot-title {
    font-size: clamp(36px, 5.5vw, 80px);
    font-weight: 700;
    line-height: 1.05;
    letter-spacing: -0.02em;
    margin-bottom: 20px;
    color: #fff;
    text-shadow: 0 6px 30px rgba(0, 0, 0, 0.6);
}
.rot-sub {
    font-size: 18px;
    line-height: 1.7;
    color: rgba(255, 255, 255, 0.92);
    text-shadow: 0 4px 18px rgba(0, 0, 0, 0.45);
    font-weight: 500;
    max-width: 680px;
    margin: 0 auto;
}
.hero-kicker {
    display: flex;
    align-items: center;
    gap: 14px;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.12em;
    color: var(--brand-light);
    text-transform: uppercase;
    margin-bottom: 24px;
    position: relative;
    z-index: 10;
}
.hero-kicker::before {
    content: '';
    width: 32px;
    height: 1px;
    background: var(--brand-light);
}
.hero-btns {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    justify-content: center;
    margin-top: 40px;
    position: relative;
    z-index: 10;
}
.btn-pri {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: var(--brand);
    color: #fff;
    padding: 16px 28px;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 600;
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: all 0.3s;
}
.btn-pri:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 32px rgba(123, 41, 43, 0.35);
}
.btn-sec {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: transparent;
    color: #fff;
    padding: 16px 28px;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 600;
    text-decoration: none;
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: all 0.3s;
}
.btn-sec:hover {
    border-color: rgba(255, 255, 255, 0.45);
    background: rgba(255, 255, 255, 0.05);
}
/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 10%;
    left: 50%;
    transform: translateX(-50%);
    z-index: 100;
    display: flex;
    flex-direction: column;
    align-items: center;
    pointer-events: auto;
    transition: opacity 0.45s ease, transform 0.45s ease;
    will-change: transform, opacity;
    opacity: 1;
    visibility: visible;
}
.scroll-indicator.hidden {
    transform: translate(-50%, 36px);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}
.scroll-indicator.hidden .arrow,
.scroll-indicator.hidden .pulse-circle,
.scroll-indicator.hidden .scroll-indicator-text {
    animation-play-state: paused;
}
.scroll-indicator-arrows {
    position: relative;
    width: 50px;
    height: 60px;
    margin-bottom: 15px;
}
.arrow {
    position: absolute;
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
}
.arrow svg {
    width: 30px;
    height: 30px;
    fill: rgba(255, 255, 255, 0.95);
    filter: drop-shadow(0 2px 8px rgba(0, 0, 0, 0.4));
}
.pulse-circle {
    position: absolute;
    width: 70px;
    height: 70px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.15);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: -1;
    pointer-events: none;
}
.scroll-indicator-text {
    color: rgba(255, 255, 255, 0.95);
    font-size: 16px;
    font-weight: 500;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.4);
    letter-spacing: 2px;
}
@keyframes arrow-slide {
    0% {
        opacity: 0;
        transform: translateY(-20px);
    }
    20% {
        opacity: 1;
        transform: translateY(0);
    }
    80% {
        opacity: 1;
        transform: translateY(0);
    }
    100% {
        opacity: 0;
        transform: translateY(20px);
    }
}
@keyframes pulse {
    0% {
        transform: translate(-50%, -50%) scale(0.8);
        opacity: 0.8;
    }
    50% {
        transform: translate(-50%, -50%) scale(1.1);
        opacity: 0.4;
    }
    100% {
        transform: translate(-50%, -50%) scale(0.8);
        opacity: 0.8;
    }
}
@keyframes breathe {
    0% {
        opacity: 0.6;
        transform: translateY(0);
    }
    50% {
        opacity: 1;
        transform: translateY(-10px);
    }
    100% {
        opacity: 0.6;
        transform: translateY(0);
    }
}
.arrow:nth-child(1) {
    animation: arrow-slide 2s infinite;
}
.arrow:nth-child(2) {
    animation: arrow-slide 2s infinite 0.5s;
}
.pulse-circle {
    animation: pulse 3s infinite ease-in-out;
}
.scroll-indicator-text {
    animation: breathe 2.5s infinite ease-in-out;
}
@media (max-width: 1024px) {
    html {
        overflow-x: visible;
    }
    .hero,
    .industry,
    .process,
    .case,
    .factory,
    .partners,
    .faq,
    .contact {
        max-width: 100vw;
        overflow-x: hidden;
    }
    .hero {
        min-height: auto;
    }
    .rot-title {
        font-size: 32px;
    }
    .rot-sub {
        font-size: 15px;
    }
    .scroll-indicator {
        bottom: 8%;
    }
}
@media (max-width: 768px) {
    .hero {
        min-height: auto;
    }
    .hero-inner {
        min-height: auto;
        padding: 100px 0 40px;
    }
    .rot-title {
        font-size: 28px;
    }
    .rot-sub {
        font-size: 14px;
    }
    .scroll-indicator-arrows {
        width: 40px;
        height: 50px;
    }
    .arrow svg {
        width: 25px;
        height: 25px;
    }
    .scroll-indicator-text {
        font-size: 14px;
    }
}
/* Industry - Vertical Sections */
.industry {
    position: relative;
    background: var(--bg);
    padding: 100px 0;
}
.ind-header {
    padding-bottom: 48px;
}
.ind-header .sec-tag {
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.1em;
    color: var(--brand);
    text-transform: uppercase;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 12px;
}
.ind-header .sec-tag::after {
    content: '';
    flex: 1;
    height: 1px;
    background: linear-gradient(to right, rgba(123, 41, 43, 0.4), transparent);
    max-width: 200px;
}
.ind-header h2 {
    font-size: clamp(32px, 4vw, 56px);
    font-weight: 700;
    line-height: 1.1;
    color: var(--text);
}
.ind-header p {
    font-size: 16px;
    color: var(--text-muted);
    max-width: 560px;
    margin-top: 16px;
    line-height: 1.6;
}
.ind-section {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
    margin-bottom: 120px;
}
.ind-section:last-child {
    margin-bottom: 0;
}
.ind-section:nth-child(even) .ind-section-text {
    order: 2;
}
.ind-section:nth-child(even) .ind-section-visual {
    order: 1;
}
.ind-section-tag {
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--brand);
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 10px;
}
.ind-section-tag .num {
    font-family: var(--fd);
    opacity: 0.6;
}
.ind-section h3 {
    font-size: clamp(28px, 3vw, 44px);
    font-weight: 700;
    line-height: 1.15;
    margin-bottom: 20px;
    color: var(--text);
}
.ind-section-desc {
    font-size: 15px;
    line-height: 1.7;
    color: var(--text-muted);
    margin-bottom: 28px;
    max-width: 480px;
}
.ind-challenges {
    margin-bottom: 28px;
}
.ind-challenge {
    display: flex;
    align-items: center;
    font-size: 14px;
    color: var(--text);
    margin-bottom: 10px;
    max-width: 460px;
}
.ind-challenge svg {
    width: 18px;
    height: 18px;
    color: var(--brand);
    flex-shrink: 0;
}
.ind-sol-label {
    font-size: 12px;
    font-weight: 600;
    color: var(--brand);
    margin-bottom: 14px;
    display: flex;
    align-items: center;
    gap: 10px;
}
.ind-sol-label::before {
    content: '';
    width: 20px;
    height: 1px;
    background: var(--brand);
}
.ind-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 20px;
}
.ind-tag {
    padding: 6px 14px;
    background: rgba(123, 41, 43, 0.05);
    border: 1px solid rgba(123, 41, 43, 0.15);
    border-radius: 4px;
    font-size: 12px;
    color: var(--brand);
    white-space: nowrap;
    font-weight: 500;
}
.ind-count {
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 20px;
}
.ind-device-model {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    font-weight: 600;
    color: var(--brand);
    margin-bottom: 16px;
}
.ind-section-visual {
    position: relative;
    border-radius: 20px;
    overflow: hidden;
    background: var(--bg-dark);
    min-height: 420px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.ind-section-visual .bg-pattern {
    position: absolute;
}
/* Process - Horizontal Step Bar */
.process {
    position: relative;
    background: var(--bg-light);
    padding: 120px 0;
}
.process-header {
    text-align: center;
    margin-bottom: 60px;
}
.process-header .sec-tag {
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.15em;
    color: var(--brand);
    text-transform: uppercase;
    margin-bottom: 16px;
}
.process-header h2 {
    font-size: clamp(32px, 4vw, 56px);
    font-weight: 700;
    line-height: 1.1;
    color: var(--text);
}
.process-header p {
    font-size: 16px;
    color: var(--text-muted);
    margin-top: 16px;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}
.process-horizontal {
    max-width: 1100px;
    margin: 0 auto;
}
.process-bar {
    position: relative;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 48px;
    padding: 0 10px;
}
.process-bar-track {
    position: absolute;
    top: 24px;
    left: 48px;
    right: 48px;
    height: 2px;
    background: rgba(0, 0, 0, 0.06);
    z-index: 0;
    border-radius: 1px;
}
.process-bar-fill {
    height: 100%;
    background: var(--brand);
    transition: width 0.5s cubic-bezier(0.16, 1, 0.3, 1);
    border-radius: 1px;
}
.process-dot-item {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    cursor: pointer;
    gap: 10px;
    flex: 1;
    -webkit-tap-highlight-color: transparent;
}
.process-dot {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: #fff;
    border: 2px solid rgba(0, 0, 0, 0.08);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--fd);
    font-size: 14px;
    font-weight: 700;
    color: var(--text-dim);
    transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.process-dot-item.active .process-dot {
    background: var(--brand);
    border-color: var(--brand);
    color: #fff;
    box-shadow: 0 0 30px rgba(123, 41, 43, 0.3);
    transform: scale(1.1);
}
.process-dot-item:hover .process-dot {
    border-color: var(--brand-light);
    color: var(--brand-light);
}
.process-dot-item.active:hover .process-dot {
    color: #fff;
    border-color: var(--brand);
}
.process-dot-label {
    font-size: 12px;
    font-weight: 500;
    color: var(--text-muted);
    text-align: center;
    max-width: 90px;
    line-height: 1.3;
    transition: color 0.3s;
}
.process-dot-item.active .process-dot-label {
    color: var(--text);
    font-weight: 600;
}
.process-detail-panel {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 40px;
    display: none;
}
.process-detail-panel.active {
    display: block;
    animation: fadeInUp 0.5s ease;
}
.process-detail-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: start;
}
.process-detail-title {
    font-size: 26px;
    font-weight: 700;
    margin-bottom: 14px;
    color: var(--text);
    line-height: 1.2;
}
.process-detail-desc {
    font-size: 15px;
    color: var(--text-muted);
    line-height: 1.7;
    margin-bottom: 24px;
}
.process-detail-params {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
}
.process-param {
    background: #f8f9fc;
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 14px;
}
.process-param-label {
    font-size: 10px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 6px;
}
.process-param-value {
    font-family: var(--fd);
    font-size: 18px;
    font-weight: 700;
    color: var(--text);
}
.process-detail-visual {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    background: var(--bg-dark);
    min-height: 260px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.process-detail-visual img {
    width: 100%;
    height: 260px;
    object-fit: cover;
    transition: transform 0.6s ease;
}
.process-detail-visual:hover img {
    transform: scale(1.04);
}
.process-video-btn {
    position: absolute;
    bottom: 16px;
    right: 16px;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    background: rgba(0, 0, 0, 0.55);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 8px;
    font-size: 12px;
    color: #fff;
    cursor: pointer;
    transition: all 0.3s;
    text-decoration: none;
    z-index: 2;
}
.process-video-btn:hover {
    background: var(--brand);
    border-color: var(--brand);
}
.process-capability {
    margin-top: 60px;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 48px;
}
.process-capability h3 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 32px;
    text-align: center;
    color: var(--text);
}
.cap-table {
    width: 100%;
    border-collapse: collapse;
}
.cap-table th {
    text-align: left;
    padding: 14px 16px;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-bottom: 2px solid var(--border);
}
.cap-table td {
    padding: 16px;
    font-size: 14px;
    border-bottom: 1px solid var(--border);
}
.cap-table td:first-child {
    font-weight: 600;
    color: var(--text);
}
.cap-table .cap-our {
    color: var(--brand);
    font-weight: 600;
}
.cap-table .cap-industry {
    color: var(--text-muted);
}
/* Case - 3D Card Stack */
.case {
    position: relative;
    background: linear-gradient(180deg, #f0f1f5 0%, #e8e9ef 100%);
    padding: 120px 0;
}
.case-layout {
    display: flex;
    gap: 48px;
}
.case-sidebar {
    width: 340px;
    flex-shrink: 0;
}
.case-sidebar .sec-tag {
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.1em;
    color: var(--brand);
    text-transform: uppercase;
    margin-bottom: 14px;
}
.case-sidebar h2 {
    font-size: 40px;
    font-weight: 700;
    color: var(--text);
    line-height: 1.1;
    margin-bottom: 48px;
}
.case-nav-item {
    padding: 20px 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
    cursor: pointer;
    transition: all 0.3s;
}
.case-nav-item:hover {
    padding-left: 12px;
}
.case-nav-item.active {
    border-left: 3px solid var(--brand);
    padding-left: 20px;
    background: rgba(123, 41, 43, 0.03);
    margin-left: -20px;
    padding-right: 20px;
    border-bottom-color: transparent;
}
.case-nav-client {
    font-size: 18px;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 6px;
}
.case-nav-tag {
    display: inline-block;
    padding: 3px 10px;
    background: var(--brand);
    color: #fff;
    font-size: 11px;
    border-radius: 999px;
    margin-bottom: 6px;
}
.case-nav-desc {
    font-size: 13px;
    color: rgba(26, 30, 43, 0.5);
}
.case-stage {
    flex: 1;
    position: relative;
    min-height: auto;
    height: auto;
    perspective: 1200px;
}
.case-card {
    position: absolute;
    inset: 0;
    background: #fff;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.08);
    padding: 40px;
    opacity: 0;
    transform: translateX(60px) rotateY(-8deg);
    transition: all 0.7s cubic-bezier(0.16, 1, 0.3, 1);
    display: flex;
    flex-direction: column;
}
.case-card.active {
    position: relative;
    inset: auto;
    opacity: 1;
    transform: translateX(0) rotateY(0);
    z-index: 10;
}
.case-card.prev {
    opacity: 0;
    transform: translateX(-60px) rotateY(8deg);
    z-index: 0;
}
.case-card-ind {
    font-size: 12px;
    font-weight: 600;
    color: var(--brand);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 24px;
}
.case-card-prob,
.case-card-sol {
    font-size: 16px;
    line-height: 1.7;
    color: var(--text);
    margin-bottom: 20px;
    padding-bottom: 20px;
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
}
.case-card-prob strong,
.case-card-sol strong {
    color: var(--text);
}
.case-badges {
    display: flex;
    gap: 12px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}
.case-badge {
    padding: 10px 18px;
    border-radius: 8px;
    font-size: 13px;
    font-weight: 600;
    color: #fff;
    background: var(--brand);
    opacity: 0;
    transform: translateY(12px);
    transition: all 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.case-badge.show {
    opacity: 1;
    transform: translateY(0);
}
.case-quote {
    background: #f8f9fc;
    border-left: 3px solid var(--brand);
    padding: 20px 24px;
    border-radius: 0 12px 12px 0;
    margin-bottom: 24px;
}
.case-quote p {
    font-size: 14px;
    line-height: 1.7;
    color: var(--text-muted);
    font-style: italic;
    margin-bottom: 12px;
}
.case-quote cite {
    font-size: 13px;
    font-weight: 600;
    color: var(--text);
    font-style: normal;
}
.case-quote cite span {
    font-weight: 400;
    color: var(--text-muted);
}
.case-card-img {
    flex: 1;
    max-height: 360px;
    border-radius: 12px;
    position: relative;
    background: var(--bg-dark);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}
.case-card-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}
/* Factory */
.factory {
    position: relative;
    background: #111318;
    padding: 120px 0;
    overflow: hidden;
    color: #fff;
}
.factory .glow-brand {
    width: 900px;
    height: 900px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    opacity: 0.15;
}
.factory-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    margin-bottom: 64px;
}
.factory-header-left {
    max-width: 500px;
}
.factory-header .sec-tag {
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.1em;
    color: var(--brand-light);
    text-transform: uppercase;
    margin-bottom: 14px;
}
.factory-header h2 {
    font-size: clamp(32px, 4vw, 52px);
    font-weight: 700;
    line-height: 1.1;
    color: #fff;
}
.factory-header p {
    font-size: 15px;
    color: var(--text-muted-light);
    margin-top: 14px;
    line-height: 1.6;
}
.factory-header-right {
    text-align: right;
}
.factory-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-bottom: 80px;
}
.factory-stat {
    text-align: center;
    padding: 32px 24px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-light);
    border-radius: 16px;
    transition: all 0.4s;
}
.factory-stat:hover {
    border-color: rgba(123, 41, 43, 0.35);
    background: rgba(123, 41, 43, 0.06);
    transform: translateY(-4px);
}
.factory-stat-num {
    font-family: var(--fd);
    font-size: 52px;
    font-weight: 700;
    line-height: 1;
    margin-bottom: 8px;
    background: linear-gradient(135deg, #fff 0%, rgba(255, 255, 255, 0.7) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
.factory-stat-unit {
    font-size: 20px;
    font-weight: 400;
    color: var(--text-muted-light);
}
.factory-stat-label {
    font-size: 12px;
    color: var(--text-dim-light);
    margin-top: 8px;
}
.cert-wall {
    display: flex;
    justify-content: center;
    gap: 48px;
    margin-bottom: 80px;
    flex-wrap: wrap;
}
.cert-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}
.cert-icon {
    width: 64px;
    height: 64px;
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-light);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--brand-light);
}
.cert-icon svg {
    width: 28px;
    height: 28px;
}
.cert-label {
    font-size: 13px;
    color: var(--text-muted-light);
    text-align: center;
}
.factory-flow {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}
.factory-flow-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-light);
    border-radius: 16px;
    padding: 28px 24px;
    transition: all 0.4s;
    display: flex;
    flex-direction: column;
    gap: 12px;
    position: relative;
    overflow: hidden;
}
.factory-flow-card::before {
    content: '';
    position: absolute;
    top: -20px;
    right: -20px;
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: rgba(123, 41, 43, 0.06);
    pointer-events: none;
}
.factory-flow-card:hover {
    border-color: rgba(123, 41, 43, 0.4);
    background: rgba(123, 41, 43, 0.06);
    box-shadow: 0 8px 40px rgba(123, 41, 43, 0.1);
    transform: translateY(-3px);
}
.factory-flow-icon {
    width: 44px;
    height: 44px;
    border-radius: 10px;
    background: rgba(123, 41, 43, 0.12);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--brand-light);
    flex-shrink: 0;
    position: relative;
    z-index: 1;
}
.factory-flow-icon svg {
    width: 22px;
    height: 22px;
}
.factory-flow-title {
    font-size: 17px;
    font-weight: 600;
    color: #fff;
    position: relative;
    z-index: 1;
}
.factory-flow-desc {
    font-size: 13px;
    color: var(--text-muted-light);
    line-height: 1.5;
    position: relative;
    z-index: 1;
}
.factory-flow-param {
    font-size: 13px;
    color: var(--brand-light);
    font-weight: 600;
    margin-top: auto;
    position: relative;
    z-index: 1;
}
.factory-photo {
    width: 100%;
    height: 140px;
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-light);
    margin-top: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-dim-light);
    font-size: 12px;
    position: relative;
    overflow: hidden;
}
.factory-photo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}
/* Partners */
.partners {
    position: relative;
    background: var(--bg-light);
    padding: 100px 0;
    overflow: hidden;
}
.partners-header {
    text-align: center;
    margin-bottom: 56px;
}
.partners-header .sec-tag {
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.15em;
    color: var(--brand);
    text-transform: uppercase;
    margin-bottom: 16px;
}
.partners-header h2 {
    font-size: clamp(28px, 3.5vw, 44px);
    font-weight: 700;
    line-height: 1.1;
    color: var(--text);
}
.partners-header p {
    font-size: 15px;
    color: var(--text-muted);
    margin-top: 12px;
}
/* Logo Wall - Masonry Style */
.partner-logos {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    grid-auto-rows: 90px;
    gap: 16px;
    grid-auto-flow: dense;
    margin-top: 48px;
}
.partner-logo-item {
    background: #f8f9fc;
    border: 1px solid var(--border);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 16px;
    transition: all 0.4s;
    filter: grayscale(100%) brightness(1.1);
    grid-row: span 1;
    grid-column: span 1;
    overflow: hidden;
}
.partner-logo-item img {
    max-width: 85%;
    max-height: 70%;
    object-fit: contain;
    opacity: 0.8;
    transition: opacity 0.3s, transform 0.4s ease;
}
.partner-logo-item:hover {
    filter: grayscale(0%) brightness(1);
    border-color: rgba(0, 0, 0, 0.15);
    background: #fff;
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
}
.partner-logo-item:hover img {
    opacity: 1;
    transform: scale(1.05);
}
/* 锟皆讹拷锟斤拷锟戒布锟街ｏ拷每 8 锟斤拷一循锟斤拷锟斤拷锟斤拷锟街伙拷锟斤拷锟斤拷统一锟结构 */
.partner-logo-item:nth-child(8n+1) {
    grid-column: span 2;
}
.partner-logo-item:nth-child(8n+4) {
    grid-row: span 2;
}
.partner-logo-item:nth-child(8n+6) {
    grid-column: span 2;
    grid-row: span 2;
}
.partner-logo-item.hidden-item {
    display: none !important;
}
@media (max-width: 768px) {
    .partner-logos {
        grid-template-columns: repeat(2, 1fr);
        grid-auto-rows: 80px;
        gap: 12px;
    }
    .partner-logo-item:nth-child(n) {
        grid-column: span 1 !important;
        grid-row: span 1 !important;
    }
}
.trust-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
    margin-top: 24px;
}
.trust-tag {
    padding: 8px 18px;
    background: rgba(255, 255, 255, 0.6);
    border: 1px solid rgba(0, 0, 0, 0.06);
    border-radius: 999px;
    font-size: 13px;
    color: var(--text);
    font-weight: 500;
    transition: all 0.3s;
}
.trust-tag:hover {
    background: var(--brand);
    color: #fff;
    border-color: var(--brand);
    transform: translateY(-2px);
}
.partners-data {
    display: flex;
    justify-content: center;
    gap: 80px;
    margin-top: 56px;
}
.partners-data-item {
    text-align: center;
}
.partners-data-num {
    font-family: var(--fd);
    font-size: 40px;
    font-weight: 700;
    line-height: 1;
    margin-bottom: 6px;
    color: var(--text);
}
.partners-data-label {
    font-size: 12px;
    color: var(--text-muted);
}
/* ========== FAQ SECTION ========== */
.faq {
    position: relative;
    background: linear-gradient(180deg, #ffffff 0%, #f8f9fc 100%);
    padding: 120px 0;
    overflow: hidden;
}
.faq-layout {
    display: grid;
    grid-template-columns: 380px 1fr;
    gap: 80px;
    align-items: start;
}
.faq-header {
    position: sticky;
    top: 120px;
}
.faq-header .sec-tag {
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.1em;
    color: var(--brand);
    text-transform: uppercase;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 12px;
}
.faq-header .sec-tag::after {
    content: '';
    flex: 1;
    height: 1px;
    background: linear-gradient(to right, rgba(123, 41, 43, 0.4), transparent);
    max-width: 120px;
}
.faq-header h2 {
    font-size: clamp(32px, 4vw, 48px);
    font-weight: 700;
    line-height: 1.1;
    color: var(--text);
    margin-bottom: 20px;
}
.faq-header p {
    font-size: 16px;
    color: var(--text-muted);
    line-height: 1.7;
    margin-bottom: 32px;
}
.faq-cta {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: var(--brand);
    color: #fff;
    padding: 14px 24px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s;
    border: none;
    cursor: pointer;
}
.faq-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 32px rgba(123, 41, 43, 0.3);
}
.faq-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}
.faq-item {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 16px;
    overflow: hidden;
    transition: border-color 0.4s cubic-bezier(0.16, 1, 0.3, 1),
    box-shadow 0.4s cubic-bezier(0.16, 1, 0.3, 1),
    transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.03);
}
.faq-item:hover {
    border-color: rgba(123, 41, 43, 0.2);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.06);
    transform: translateY(-2px);
}
/* 展锟斤拷状态 - 统一锟斤拷 JS 锟斤拷锟狡碉拷 .is-open 锟斤拷锟狡ｏ拷锟斤拷锟斤拷使锟斤拷 [open] 选锟斤拷锟斤拷 */
.faq-item.is-open {
    border-color: rgba(123, 41, 43, 0.25);
    box-shadow: 0 12px 40px rgba(123, 41, 43, 0.08);
}
.faq-item.is-open .faq-answer {
    grid-template-rows: 1fr;
    opacity: 1;
    padding-bottom: 28px;
}
.faq-item.is-open .faq-question {
    color: var(--brand);
}
.faq-item.is-open .faq-icon {
    transform: rotate(45deg);
    background: var(--brand);
    color: #fff;
}
.faq-summary {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 24px 28px;
    cursor: pointer;
    list-style: none;
    position: relative;
}
.faq-summary::-webkit-details-marker {
    display: none;
}
.faq-num {
    font-family: var(--fd);
    font-size: 14px;
    font-weight: 700;
    color: var(--brand);
    opacity: 0.5;
    width: 32px;
    flex-shrink: 0;
}
.faq-question {
    flex: 1;
    font-size: 16px;
    font-weight: 600;
    color: var(--text);
    line-height: 1.5;
    transition: color 0.3s;
    padding-right: 12px;
}
.faq-icon {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: rgba(123, 41, 43, 0.06);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--brand);
    flex-shrink: 0;
    transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.faq-icon svg {
    width: 14px;
    height: 14px;
}
.faq-answer {
    display: grid;
    grid-template-rows: 0fr;
    opacity: 0;
    padding: 0 28px 0 76px;
    font-size: 15px;
    line-height: 1.8;
    color: var(--text-muted);
    transition: grid-template-rows 0.5s cubic-bezier(0.16, 1, 0.3, 1),
    opacity 0.5s cubic-bezier(0.16, 1, 0.3, 1),
    padding-bottom 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}
.faq-answer>div {
    overflow: hidden;
    min-height: 0;
}
.faq-answer>div>p,
.faq-answer>div>.faq-tags {
    opacity: 0;
    transform: translateY(8px);
}
/* 锟斤拷锟斤拷展锟斤拷状态锟斤拷为锟节诧拷元锟斤拷锟斤拷锟斤拷 transition锟斤拷锟斤拷锟斤拷乇锟绞憋拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟缴顿达拷 */
.faq-item.is-open .faq-answer>div>p,
.faq-item.is-open .faq-answer>div>.faq-tags {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.35s ease, transform 0.35s ease;
}
/* 展锟斤拷时锟斤拷锟斤拷锟斤拷锟斤拷锟接筹拷锟较革拷锟斤拷锟斤拷 */
.faq-item.is-open .faq-answer>div>p:nth-child(1) {
    transition-delay: 0.08s;
}
.faq-item.is-open .faq-answer>div>p:nth-child(2) {
    transition-delay: 0.14s;
}
.faq-item.is-open .faq-answer>div>p:nth-child(3) {
    transition-delay: 0.20s;
}
.faq-item.is-open .faq-answer>div>p:nth-child(4) {
    transition-delay: 0.26s;
}
.faq-item.is-open .faq-answer>div>.faq-tags {
    transition-delay: 0.32s;
}
/* ========== FAQ TAGS 锟斤拷式锟脚伙拷 ========== */
.faq-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 20px;
    padding-top: 16px;
    border-top: 1px solid rgba(0, 0, 0, 0.06);
}
.faq-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    background: rgba(123, 41, 43, 0.06);
    border: 1px solid rgba(123, 41, 43, 0.12);
    border-radius: 6px;
    font-size: 12px;
    font-weight: 500;
    color: var(--brand);
    cursor: default;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    position: relative;
    overflow: hidden;
}
/* 锟斤拷签锟斤拷锟阶帮拷锟斤拷锟斤拷锟? */
.faq-tag::before {
    content: '';
    width: 3px;
    height: 14px;
    border-radius: 2px;
    background: var(--brand);
    opacity: 0.4;
    transition: opacity 0.3s;
    flex-shrink: 0;
}
/* 锟斤拷停效锟斤拷 */
.faq-tag:hover {
    background: rgba(123, 41, 43, 0.12);
    border-color: rgba(123, 41, 43, 0.25);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(123, 41, 43, 0.1);
}
.faq-tag:hover::before {
    opacity: 0.8;
}
/* 锟斤拷锟斤拷锟斤拷锟? */
.faq-tag:active {
    transform: translateY(0) scale(0.97);
}
/* 锟缴碉拷锟斤拷锟角╋拷锟斤拷锟斤拷锟斤拷锟阶拷锟斤拷锟? */
.faq-tag[href] {
    cursor: pointer;
    text-decoration: none;
}
/* 锟斤拷同锟斤拷锟侥憋拷签锟斤拷色锟斤拷锟斤拷 - 通锟斤拷 data-category 锟斤拷锟皆匡拷锟斤拷 */
.faq-tag[data-category="equipment"] {
    background: rgba(123, 41, 43, 0.06);
    border-color: rgba(123, 41, 43, 0.12);
    color: var(--brand);
}
.faq-tag[data-category="equipment"]::before {
    background: var(--brand);
}
.faq-tag[data-category="process"] {
    background: rgba(0, 212, 170, 0.06);
    border-color: rgba(0, 212, 170, 0.15);
    color: #00a884;
}
.faq-tag[data-category="process"]::before {
    background: #00a884;
}
.faq-tag[data-category="tech"] {
    background: rgba(59, 130, 246, 0.06);
    border-color: rgba(59, 130, 246, 0.12);
    color: #2563eb;
}
.faq-tag[data-category="tech"]::before {
    background: #2563eb;
}
/* 展锟斤拷锟斤拷锟斤拷时锟侥憋拷签锟诫场 */
.faq-item.is-open .faq-tag {
    opacity: 0;
    transform: translateY(6px);
    animation: faqTagIn 0.4s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}
.faq-item.is-open .faq-tag:nth-child(1) {
    animation-delay: 0.32s;
}
.faq-item.is-open .faq-tag:nth-child(2) {
    animation-delay: 0.38s;
}
.faq-item.is-open .faq-tag:nth-child(3) {
    animation-delay: 0.44s;
}
.faq-item.is-open .faq-tag:nth-child(4) {
    animation-delay: 0.50s;
}
.faq-item.is-open .faq-tag:nth-child(5) {
    animation-delay: 0.56s;
}
@keyframes faqTagIn {
    from {
        opacity: 0;
        transform: translateY(6px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}
@media (max-width: 1024px) {
    .faq-layout {
        grid-template-columns: 1fr;
        gap: 48px;
    }
    .faq-header {
        position: static;
        text-align: center;
    }
    .faq-header h2 {
        max-width: 600px;
        margin-left: auto;
        margin-right: auto;
    }
    .faq-header p {
        max-width: 500px;
        margin-left: auto;
        margin-right: auto;
    }
}
@media (max-width: 768px) {
    .faq {
        padding: 80px 0;
    }
    .faq-summary {
        padding: 20px;
        gap: 12px;
    }
    .faq-question {
        font-size: 14px;
    }
    .faq-answer {
        padding: 0 20px 0 64px;
        font-size: 14px;
    }
    .faq-num {
        width: 24px;
        font-size: 12px;
    }
}
/* Contact */
.contact {
    position: relative;
    background: var(--bg-dark);
    padding: 120px 0;
    overflow: hidden;
    color: #fff;
}
.contact .glow-brand {
    width: 700px;
    height: 700px;
    top: -200px;
    right: -200px;
    opacity: 0.15;
}
.contact-layout {
    display: flex;
    gap: 64px;
}
.contact-left {
    width: 45%;
}
.contact-left .sec-tag {
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.1em;
    color: var(--brand-light);
    text-transform: uppercase;
    margin-bottom: 14px;
}
.contact-left h2 {
    font-size: clamp(32px, 4vw, 48px);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 40px;
    color: #fff;
}
.contact-adv {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 24px;
}
.contact-adv-icon {
    width: 44px;
    height: 44px;
    border-radius: 10px;
    background: rgba(123, 41, 43, 0.15);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--brand-light);
    font-size: 18px;
    flex-shrink: 0;
}
.contact-adv-text {
    font-size: 15px;
    color: rgba(255, 255, 255, 0.8);
}
.contact-info-block {
    margin-top: 48px;
}
.contact-info-item {
    margin-bottom: 20px;
}
.contact-info-label {
    font-size: 11px;
    color: var(--text-dim-light);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 4px;
}
.contact-info-value {
    font-size: 14px;
    color: var(--text-muted-light);
}
.contact-info-value a {
    color: inherit;
    text-decoration: none;
    transition: color 0.3s;
}
.contact-info-value a:hover {
    color: #fff;
}
.contact-right {
    width: 55%;
}
.contact-form {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-light);
    border-radius: 24px;
    padding: 40px;
}
.contact-form-group {
    margin-bottom: 20px;
}
.contact-form-label {
    display: block;
    font-size: 12px;
    font-weight: 500;
    color: var(--text-dim-light);
    margin-bottom: 8px;
}
.contact-form-input {
    width: 100%;
    height: 52px;
    background: rgba(255, 255, 255, 0.04);
    border: none;
    border-bottom: 1px solid var(--border-light);
    border-radius: 8px;
    padding: 0 16px;
    color: #fff;
    font-size: 15px;
    font-family: inherit;
    transition: all 0.3s;
}
.contact-form-input:focus {
    outline: none;
    border-bottom-color: var(--brand-light);
    box-shadow: 0 4px 20px rgba(123, 41, 43, 0.1);
}
.contact-form-input::placeholder {
    color: rgba(255, 255, 255, 0.2);
}
select.contact-form-input {
    cursor: pointer;
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg width='10' height='6' viewBox='0 0 10 6' fill='none'%3E%3Cpath d='M1 1L5 5L9 1' stroke='rgba(255,255,255,0.5)' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
    background-color: rgba(255, 255, 255, 0.06);
    color: #fff;
    padding-right: 40px;
}
select.contact-form-input:hover {
    background-color: rgba(255, 255, 255, 0.09);
}
select.contact-form-input:focus {
    background-color: rgba(255, 255, 255, 0.08);
    border-bottom-color: var(--brand-light);
}
/* 锟斤拷锟斤拷选锟斤拷统一锟斤拷色锟斤拷锟斤拷 */
select.contact-form-input option {
    background: #1e2230;
    color: rgba(255, 255, 255, 0.9);
    font-size: 14px;
    padding: 10px 16px;
}
/* 选锟斤拷锟斤拷 */
select.contact-form-input option:checked {
    background: var(--brand);
    color: #fff;
}
/* 锟斤拷锟斤拷锟酵ｏ拷睿–hrome/Edge/Firefox 支锟街ｏ拷 */
select.contact-form-input option:hover {
    background: var(--brand-light);
    color: #fff;
}
/* 锟斤拷锟斤拷锟斤拷 */
select.contact-form-input option:disabled {
    color: rgba(255, 255, 255, 0.25);
    background: #1e2230;
}
/* 选锟斤拷锟斤拷锟斤拷锟斤拷 */
select.contact-form-input optgroup {
    background: #1e2230;
    color: rgba(255, 255, 255, 0.6);
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}
textarea.contact-form-input {
    height: 120px;
    padding: 16px;
    resize: vertical;
}
.contact-form-submit {
    width: 100%;
    height: 52px;
    background: var(--brand);
    color: #fff;
    border: none;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    font-family: inherit;
}
.contact-form-submit:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 32px rgba(123, 41, 43, 0.3);
}
.contact-form-submit:active {
    transform: scale(0.98);
}
.form-success {
    display: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 40px;
    animation: fadeInUp 0.6s ease;
}
.form-success.show {
    display: flex;
}
.form-success-icon {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: rgba(0, 212, 170, 0.1);
    border: 2px solid var(--success);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    color: var(--success);
}
.form-success h3 {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 12px;
    color: #fff;
}
.form-success p {
    font-size: 14px;
    color: var(--text-muted-light);
    margin-bottom: 8px;
    max-width: 360px;
}
.form-success .success-detail {
    font-size: 13px;
    color: var(--text-dim-light);
    margin-bottom: 24px;
    background: rgba(0, 212, 170, 0.05);
    padding: 12px 16px;
    border-radius: 8px;
    border: 1px solid rgba(0, 212, 170, 0.15);
}
.form-success .success-detail a {
    color: var(--success);
    text-decoration: none;
}
.form-success .btn-pri {
    padding: 12px 24px;
    font-size: 14px;
}
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}
/* Lead Magnet */
.lead-magnet {
    background: linear-gradient(135deg, rgba(123, 41, 43, 0.08) 0%, rgba(123, 41, 43, 0.02) 100%);
    border: 1px solid rgba(123, 41, 43, 0.15);
    border-radius: 16px;
    padding: 32px;
    margin-bottom: 32px;
    display: flex;
    gap: 24px;
    align-items: center;
}
.lead-magnet-icon {
    width: 56px;
    height: 56px;
    border-radius: 12px;
    background: rgba(123, 41, 43, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--brand-light);
    flex-shrink: 0;
}
.lead-magnet-content h4 {
    font-size: 16px;
    font-weight: 600;
    color: #fff;
    margin-bottom: 6px;
}
.lead-magnet-content p {
    font-size: 13px;
    color: var(--text-muted-light);
    margin-bottom: 12px;
}
.lead-magnet-form {
    display: flex;
    gap: 10px;
}
.lead-magnet-form input {
    flex: 1;
    height: 44px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-light);
    border-radius: 8px;
    padding: 0 16px;
    color: #fff;
    font-size: 14px;
}
.lead-magnet-form input::placeholder {
    color: rgba(255, 255, 255, 0.25);
}
.lead-magnet-form button {
    height: 44px;
    padding: 0 20px;
    background: var(--brand);
    color: #fff;
    border: none;
    border-radius: 8px;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    white-space: nowrap;
}
.lead-magnet-form button:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(123, 41, 43, 0.3);
}
.lead-magnet-success {
    display: none;
    font-size: 13px;
    color: var(--success);
    margin-top: 8px;
}
.lead-magnet-success.show {
    display: block;
}
/* Floating Chat */
.float-chat {
    position: fixed;
    bottom: 220px;
    right: 32px;
    z-index: 800;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 12px;
}
.float-chat-btn {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--brand);
    color: #fff;
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 8px 24px rgba(123, 41, 43, 0.35);
    transition: all 0.3s;
}
.float-chat-btn:hover {
    transform: scale(1.1);
}
.float-chat-btn svg {
    width: 24px;
    height: 24px;
}
.float-chat-menu {
    display: none;
    flex-direction: column;
    gap: 8px;
    background: #fff;
    border-radius: 12px;
    padding: 12px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
    min-width: 180px;
}
.float-chat-menu.show {
    display: flex;
}
.float-chat-menu a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border-radius: 8px;
    font-size: 13px;
    color: var(--text);
    text-decoration: none;
    transition: all 0.2s;
}
.float-chat-menu a:hover {
    background: #f5f6fa;
    color: var(--brand);
}
.float-chat-menu a svg {
    width: 18px;
    height: 18px;
    color: var(--brand);
}
@media (hover: none) and (pointer: coarse) {
    .btn-pri,
    .btn-pri:active,
    .btn-pri:focus,
    .btn-pri:focus-visible,
    .faq-cta,
    .faq-cta:active,
    .faq-cta:focus,
    .faq-cta:focus-visible,
    .contact-form-submit,
    .contact-form-submit:active,
    .contact-form-submit:focus,
    .float-chat-btn,
    .float-chat-btn:active,
    .float-chat-btn:focus,
    .lead-magnet-form button,
    .lead-magnet-form button:active,
    .lead-magnet-form button:focus {
        background: var(--brand) !important;
    }
}
/* Dot Nav */
.dot-nav {
    position: fixed;
    right: 24px;
    top: 50%;
    transform: translateY(-50%);
    z-index: 900;
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.dot-nav a {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: rgba(128, 128, 128, 0.4);
    border: 1px solid rgba(128, 128, 128, 0.3);
    transition: all 0.3s;
    cursor: pointer;
    position: relative;
}
.dot-nav a::after {
    content: attr(data-label);
    position: absolute;
    right: 20px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 11px;
    color: #fff;
    background: rgba(26, 30, 43, 0.85);
    padding: 4px 10px;
    border-radius: 4px;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s;
}
.dot-nav a:hover::after {
    opacity: 1;
}
.dot-nav a:hover,
.dot-nav a.active {
    background: var(--brand);
    border-color: var(--brand);
    transform: scale(1.3);
}
/* Utility */
.sec-tag {
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}
.btn-loading {
    position: relative;
    color: transparent !important;
    pointer-events: none;
}
.btn-loading::after {
    content: '';
    position: absolute;
    width: 18px;
    height: 18px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    left: 50%;
    top: 50%;
    margin-left: -9px;
    margin-top: -9px;
}
@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}
/* SVG Animations */
.svg-flow-line {
    stroke-dasharray: 6 4;
    animation: svgDash 1s linear infinite;
}
@keyframes svgDash {
    to {
        stroke-dashoffset: -20;
    }
}
.svg-pulse {
    animation: svgPulse 2s ease-in-out infinite;
}
@keyframes svgPulse {
    0%,
    100% {
        opacity: 0.2;
    }
    50% {
        opacity: 0.5;
    }
}
/* ========== RESPONSIVE ========== */
@media (max-width: 1024px) {
    .c {
        max-width: 100%;
    }
    .ind-section {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    .ind-section:nth-child(even) .ind-section-text {
        order: 1;
    }
    .ind-section:nth-child(even) .ind-section-visual {
        order: 2;
    }
    .ind-section-visual {
        min-height: 300px;
    }
    .process-step {
        flex-direction: column !important;
        gap: 16px;
        padding-left: 60px;
        position: relative;
    }
    .process-step:nth-child(even) {
        flex-direction: column !important;
    }
    .process-step-content {
        width: 100% !important;
        margin: 0 !important;
    }
    .process-line,
    .process-line-fill {
        left: 24px;
        transform: none;
    }
    .process-step-node {
        position: absolute;
        left: 24px;
        top: 0;
        transform: translateX(-50%);
    }
    .case-layout {
        flex-direction: column;
    }
    .case-sidebar {
        width: 100%;
    }
    .case-sidebar h2 {
        margin-bottom: 24px;
    }
    .case-nav {
        display: flex;
        gap: 16px;
        overflow-x: auto;
        padding-bottom: 16px;
    }
    .case-nav-item {
        border-bottom: none;
        border-left: 3px solid transparent;
        white-space: nowrap;
        padding: 12px 16px;
    }
    .case-nav-item.active {
        border-left-color: var(--brand);
        background: rgba(123, 41, 43, 0.03);
    }
    .factory-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 24px;
    }
    .factory-header-right {
        text-align: left;
    }
    .factory-stats {
        grid-template-columns: repeat(2, 1fr);
    }
    .factory-flow {
        display: none;
    }
    .cert-wall {
        gap: 24px;
    }
    .partner-logos {
        grid-template-columns: repeat(4, 1fr);
    }
    .contact-layout {
        flex-direction: column;
        gap: 48px;
    }
    .contact-left,
    .contact-right {
        width: 100%;
    }
    .dot-nav {
        display: none;
    }
    .float-chat {
        bottom: 220px;
        right: 24px;
    }
}
@media (max-width: 768px) {
    .c {
        max-width: 100%;
    }
    .ind-section h3 {
        font-size: 26px;
    }
    .ind-section-visual {
        min-height: 240px;
    }
    .process-step-params {
        grid-template-columns: 1fr;
    }
    .process-capability {
        padding: 24px;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }
    .cap-table {
        font-size: 12px;
        min-width: 600px;
    }
    .cap-table td {
        padding: 10px;
    }
    .case-quote {
        padding: 16px;
    }
    .factory-stats {
        grid-template-columns: 1fr;
    }
    .factory-flow {
        display: none;
    }
    .cert-wall {
        gap: 16px;
    }
    .partner-logos {
        grid-template-columns: repeat(2, 1fr);
    }
    .partners-data {
        flex-direction: column;
        gap: 32px;
    }
    .lead-magnet {
        flex-direction: column;
        align-items: flex-start;
    }
    .lead-magnet-form {
        width: 100%;
        flex-direction: column;
    }
    .lead-magnet-form input,
    .lead-magnet-form button {
        width: 100%;
    }
    .lead-magnet-form input {
        flex: none;
        height: 44px;
        min-height: 44px;
        padding: 0 16px;
    }
    .float-chat {
        bottom: 220px;
        right: 16px;
    }
    .process-timeline {
        padding-left: 48px;
    }
    .process-step {
        margin-bottom: 48px;
    }
    .process-step-content {
        padding-left: 0;
    }
    .process-step-diagram {
        min-height: 120px;
    }
    .process-step-diagram svg {
        max-width: 100%;
        height: auto;
    }
    .case-stage {
        min-height: auto;
    }
    .case-card {
        padding: 24px;
    }
    .case-card-img {
        max-height: 240px;
    }
    .contact-layout {
        gap: 40px;
    }
    .contact-form {
        padding: 24px;
    }
    .factory-stat-num {
        font-size: 36px;
    }
}
/* ========== CUSTOM SELECT DROPDOWN ========== */
.custom-select-wrapper {
    position: relative;
    width: 100%;
}
/* 锟斤拷锟斤拷原锟斤拷 select锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟结交锟斤拷锟斤拷锟较帮拷锟斤拷锟斤拷 */
.custom-select-wrapper select {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
    pointer-events: none;
}
.custom-select-trigger {
    width: 100%;
    height: 52px;
    background: rgba(255, 255, 255, 0.04);
    border: none;
    border-bottom: 1px solid var(--border-light);
    border-radius: 8px;
    padding: 0 40px 0 16px;
    color: #fff;
    font-size: 15px;
    font-family: inherit;
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    transition: all 0.3s;
    position: relative;
}
.custom-select-trigger:hover {
    background: rgba(255, 255, 255, 0.07);
}
.custom-select-trigger.active {
    border-bottom-color: var(--brand-light);
    box-shadow: 0 4px 20px rgba(123, 41, 43, 0.1);
}
.custom-select-trigger svg {
    width: 10px;
    height: 6px;
    color: rgba(255, 255, 255, 0.5);
    transition: transform 0.3s;
    flex-shrink: 0;
}
.custom-select-trigger.active svg {
    transform: rotate(180deg);
}
.custom-select-trigger .placeholder {
    color: rgba(255, 255, 255, 0.2);
}
.custom-select-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    right: 0;
    background: #1e2230;
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 12px;
    padding: 8px;
    opacity: 0;
    transform: translateY(-10px) scale(0.96);
    pointer-events: none;
    transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
    z-index: 100;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
    max-height: 280px;
    overflow-y: auto;
}
.custom-select-dropdown.open {
    opacity: 1;
    transform: translateY(0) scale(1);
    pointer-events: auto;
}
.custom-option {
    padding: 12px 16px;
    border-radius: 8px;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.85);
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.custom-option:hover {
    background: rgba(123, 41, 43, 0.25);
    color: #fff;
}
.custom-option.selected {
    background: var(--brand);
    color: #fff;
}
.custom-option.selected::after {
    content: '?';
    font-size: 12px;
    opacity: 0.9;
}
.custom-select-dropdown::-webkit-scrollbar {
    width: 4px;
}
.custom-select-dropdown::-webkit-scrollbar-track {
    background: transparent;
}
.custom-select-dropdown::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.15);
    border-radius: 2px;
}
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}
@media (max-width: 1024px) {
    .process-detail-layout {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    .process-bar {
        gap: 0;
        overflow-x: auto;
        padding-bottom: 8px;
    }
    .process-dot-item {
        min-width: 80px;
        flex: 0 0 auto;
    }
    .process-bar-track {
        left: 32px;
        right: 32px;
    }
    .process-step-params {
        grid-template-columns: 1fr;
    }
    .process-capability {
        padding: 24px;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }
}
@media (max-width: 768px) {
    .process-detail-panel {
        padding: 24px;
    }
    .process-detail-layout {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    .process-detail-title {
        font-size: 22px;
    }
    .process-detail-params {
        grid-template-columns: 1fr 1fr;
    }
    .process-dot {
        width: 40px;
        height: 40px;
        font-size: 12px;
    }
    .process-dot-label {
        font-size: 11px;
        max-width: 70px;
    }
    .process-bar {
        margin-bottom: 32px;
    }
    .process-detail-visual {
        min-height: 200px;
    }
    .process-detail-visual img {
        height: 200px;
    }
    .process-capability {
        padding: 20px;
    }
}