/* ============================================
   Variables & Reset
   ============================================ */
/* 峄山碑篆体 logo 子集（仅“振兴”），首屏优先加载 */
@font-face {
    font-family: 'YiShanBei';
    src: url('../fonts/YiShanBei-logo.woff2') format('woff2');
    font-weight: normal;
    font-style: normal;
    font-display: swap;
    unicode-range: U+5174, U+632F;
}

/* 峄山碑篆体完整字形，作为后备 */
@font-face {
    font-family: 'YiShanBei';
    src: url('../fonts/YiShanBei.ttf') format('truetype');
    font-weight: normal;
    font-style: normal;
    font-display: swap;
}

:root {
    --bg: #000;
    --surface: #0d0d0d;
    --text: #f5f5f7;
    --text-secondary: #86868b;
    --text-tertiary: #515154;
    --accent: #2997ff;
    --accent-dim: rgba(41, 151, 255, 0.15);
    --border: rgba(255, 255, 255, 0.08);
    --radius: 20px;
    --max-width: 1200px;
    --nav-height: 80px;
    --section-gap: 160px;
}

*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    background: var(--bg);
    color: var(--text);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "PingFang SC", "Microsoft YaHei", sans-serif;
    font-size: 17px;
    line-height: 1.6;
    background: var(--bg);
    overflow-x: hidden;
}

a {
    color: inherit;
    text-decoration: none;
}

img {
    max-width: 100%;
    display: block;
}

/* ============================================
   Navigation
   ============================================ */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    height: var(--nav-height);
    transition: background 0.4s ease, backdrop-filter 0.4s ease;
}

.nav.scrolled {
    background: rgba(0, 0, 0, 0.72);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    border-bottom: 1px solid var(--border);
}

.nav-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 32px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-brand {
    font-size: 18px;
    font-weight: 600;
    letter-spacing: -0.01em;
    color: var(--text);
    display: flex;
    align-items: center;
    gap: 10px;
}

.nav-logo {
    font-family: 'YiShanBei', 'STKaiti', 'KaiTi', serif;
    font-size: 72px;
    color: var(--text);
    letter-spacing: 0.04em;
    line-height: 1;
}

.nav-brand span {
    font-size: 20px;
    font-weight: 500;
}

.nav-links {
    display: flex;
    gap: 32px;
}

.nav-links a {
    font-size: 13px;
    font-weight: 400;
    color: var(--text-secondary);
    transition: color 0.2s ease;
    letter-spacing: 0.01em;
}

.nav-links a:hover,
.nav-links a.is-active {
    color: var(--text);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.nav-toggle span {
    display: block;
    width: 18px;
    height: 1.5px;
    background: var(--text);
    transition: transform 0.3s ease;
}

.nav-toggle.active span:nth-child(1) {
    transform: translateY(3px) rotate(45deg);
}

.nav-toggle.active span:nth-child(2) {
    transform: translateY(-3px) rotate(-45deg);
}

/* ============================================
   Hero
   ============================================ */
.hero {
    position: relative;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: radial-gradient(ellipse 80% 60% at 50% 40%, #0a1628 0%, #000 70%);
}

.hero-visual {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.hero-reticle {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 480px;
    height: 480px;
    transform: translate(-50%, -52%);
    border-radius: 50%;
    border: 1px solid rgba(255, 255, 255, 0.03);
    box-shadow: 0 0 200px rgba(41, 151, 255, 0.04);
}

.hero-ring {
    position: absolute;
    top: 50%;
    left: 50%;
    border-radius: 50%;
    border: 1px solid rgba(255, 255, 255, 0.025);
    transform: translate(-50%, -50%);
}

.hero-ring--1 {
    width: 640px;
    height: 640px;
}

.hero-ring--2 {
    width: 800px;
    height: 800px;
}

.hero-grid {
    position: absolute;
    inset: 0;
    background-image:
        radial-gradient(circle, rgba(255,255,255,0.04) 1px, transparent 1px);
    background-size: 50px 50px;
    mask-image: radial-gradient(ellipse 60% 50% at 50% 40%, black 30%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse 60% 50% at 50% 40%, black 30%, transparent 70%);
}

.hero-content {
    position: relative;
    text-align: center;
    z-index: 2;
    padding: 0 24px;
}

.hero-brand {
    font-family: 'YiShanBei', 'STKaiti', 'KaiTi', serif;
    font-size: clamp(64px, 10vw, 132px);
    color: var(--text);
    line-height: 0.92;
    letter-spacing: -0.02em;
    margin-bottom: 16px;
}

.hero-brand.animate-in {
    animation-delay: 0s;
}

.hero-title {
    font-size: clamp(44px, 7vw, 88px);
    font-weight: 600;
    letter-spacing: -0.03em;
    line-height: 1.07;
    color: var(--text);
    margin-bottom: 20px;
}

.hero-subtitle {
    font-size: clamp(17px, 2.2vw, 21px);
    font-weight: 400;
    color: var(--text-secondary);
    letter-spacing: 0.04em;
}

.hero-description {
    max-width: 760px;
    margin: 24px auto 0;
    font-size: clamp(17px, 2vw, 20px);
    line-height: 1.75;
    color: var(--text-secondary);
    letter-spacing: 0.01em;
}

.hero-orbit {
    position: absolute;
    top: 50%;
    left: 50%;
    border-radius: 50%;
    border: 1px solid rgba(41, 151, 255, 0.12);
    filter: blur(0.2px);
    opacity: 0.55;
}

.hero-orbit--1 {
    width: 560px;
    height: 560px;
    animation: orbitFloat1 16s ease-in-out infinite;
}

.hero-orbit--2 {
    width: 720px;
    height: 720px;
    animation: orbitFloat2 16s ease-in-out infinite -8s;
}

@keyframes orbitFloat1 {
    0%, 100% { transform: translate(-52%, -48%) scale(1); opacity: 0.38; }
    50% { transform: translate(-51%, -49%) scale(1.035); opacity: 0.62; }
}

@keyframes orbitFloat2 {
    0%, 100% { transform: translate(-48%, -53%) scale(1); opacity: 0.38; }
    50% { transform: translate(-49%, -52%) scale(1.035); opacity: 0.62; }
}

.hero-actions,
.summary-actions {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 16px;
    margin-top: 32px;
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 156px;
    padding: 14px 24px;
    border-radius: 999px;
    border: 1px solid transparent;
    font-size: 15px;
    font-weight: 500;
    transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease, color 0.2s ease;
}

.button:hover {
    transform: translateY(-1px);
}

.button--primary {
    background: var(--accent);
    color: #fff;
}

.button--primary:hover {
    background: #40a9ff;
}

.button--secondary {
    background: rgba(255, 255, 255, 0.03);
    border-color: var(--border);
    color: var(--text);
}

.button--secondary:hover {
    border-color: rgba(255, 255, 255, 0.16);
}

.capability-link {
    display: block;
    transition: transform 0.3s ease, border-color 0.3s ease, background 0.3s ease;
}

.capability-link:hover {
    transform: translateY(-4px);
    border-color: rgba(255, 255, 255, 0.16);
}

.card-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-top: 24px;
    font-size: 14px;
    color: var(--accent);
}

.card-link::after {
    content: '→';
}

.page-hero {
    padding: calc(var(--nav-height) + 72px) 32px 96px;
    min-height: 72vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: radial-gradient(ellipse 70% 60% at 50% 30%, #0a1628 0%, #000 72%);
}

.page-hero__content {
    max-width: 820px;
}

.page-hero__lead {
    margin: 24px auto 0;
    max-width: 720px;
    font-size: clamp(18px, 2.2vw, 22px);
    line-height: 1.75;
    color: var(--text-secondary);
}

.section--summary {
    padding-top: 0;
}

.summary-panel {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 56px 48px;
    border: 1px solid var(--border);
    border-radius: calc(var(--radius) + 4px);
    background: linear-gradient(180deg, rgba(255,255,255,0.04), rgba(255,255,255,0.02));
    text-align: center;
}

.summary-panel .section-heading {
    margin-bottom: 20px;
}

.summary-panel .section-lead {
    margin-top: 0;
}

/* ============================================
   Sections (shared)
   ============================================ */
.section {
    padding: var(--section-gap) 32px;
}

.section-intro {
    text-align: center;
    margin-bottom: 120px;
}

.eyebrow {
    display: block;
    font-size: 13px;
    font-weight: 500;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 16px;
}

.section-heading {
    font-size: clamp(36px, 5vw, 64px);
    font-weight: 600;
    letter-spacing: -0.025em;
    line-height: 1.12;
    color: var(--text);
}

.section-lead {
    max-width: 760px;
    margin: 24px auto 0;
    font-size: 18px;
    line-height: 1.75;
    color: var(--text-secondary);
}

/* ============================================
   Capability / Fit / Process
   ============================================ */
.section--capabilities {
    padding-top: 140px;
}

.capability-grid {
    max-width: var(--max-width);
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px;
}

.capability-card {
    position: relative;
    overflow: hidden;
    background: linear-gradient(180deg, rgba(255,255,255,0.04), rgba(255,255,255,0.02));
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 40px 32px;
    min-height: 260px;
}

.capability-visual {
    height: 88px;
    margin-bottom: 28px;
    position: relative;
    opacity: 0.9;
}

.cv-window,
.cv-target,
.cv-node,
.cv-stop {
    position: absolute;
    display: block;
}

.capability-visual--system .cv-window {
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: 14px;
    background: linear-gradient(180deg, rgba(255,255,255,0.05), rgba(255,255,255,0.015));
    animation: floatSoft 8s ease-in-out infinite;
}

.capability-visual--system .cv-window--1 { inset: 8px 72px 26px 0; }
.capability-visual--system .cv-window--2 { inset: 22px 28px 12px 58px; animation-delay: -2s; }
.capability-visual--system .cv-window--3 { inset: 34px 0 0 112px; animation-delay: -4s; }

.capability-visual--vision .cv-scan {
    position: absolute;
    inset: 8px 0;
    border-radius: 16px;
    border: 1px solid rgba(255,255,255,0.08);
    background: radial-gradient(circle at center, rgba(41, 151, 255, 0.08), transparent 70%);
}

.capability-visual--vision .cv-target {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    border: 1px solid rgba(41, 151, 255, 0.4);
    box-shadow: 0 0 18px rgba(41, 151, 255, 0.18);
    animation: pulseSoft 4s ease-in-out infinite;
}

.capability-visual--vision .cv-target--1 { top: 20px; left: 22%; }
.capability-visual--vision .cv-target--2 { bottom: 18px; right: 20%; animation-delay: -2s; }

.capability-visual--network .cv-node {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: rgba(41, 151, 255, 0.75);
    box-shadow: 0 0 16px rgba(41, 151, 255, 0.28);
}

.capability-visual--network .cv-node--1 { top: 14px; left: 8%; }
.capability-visual--network .cv-node--2 { top: 22px; right: 16%; }
.capability-visual--network .cv-node--3 { bottom: 14px; left: 28%; }
.capability-visual--network .cv-node--4 { bottom: 10px; right: 10%; }

.cv-link {
    position: absolute;
    height: 1px;
    background: linear-gradient(90deg, rgba(41,151,255,0.08), rgba(41,151,255,0.58), rgba(41,151,255,0.08));
    transform-origin: left center;
    animation: shimmerLine 5s linear infinite;
}

.cv-link--1 { top: 20px; left: 12%; width: 42%; transform: rotate(6deg); }
.cv-link--2 { bottom: 18px; left: 31%; width: 46%; transform: rotate(-10deg); animation-delay: -1.5s; }
.cv-link--3 { top: 39px; left: 34%; width: 40%; transform: rotate(18deg); animation-delay: -3s; }

.capability-visual--delivery .cv-path {
    position: absolute;
    inset: 40px 10% auto 10%;
    height: 2px;
    background: linear-gradient(90deg, rgba(255,255,255,0.05), rgba(41,151,255,0.7), rgba(255,255,255,0.05));
}

.capability-visual--delivery .cv-stop {
    top: 32px;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    border: 1px solid rgba(255,255,255,0.14);
    background: rgba(8, 18, 34, 0.92);
    animation: pulseSoft 4.5s ease-in-out infinite;
}

.capability-visual--delivery .cv-stop--1 { left: 10%; }
.capability-visual--delivery .cv-stop--2 { left: 34%; animation-delay: -1s; }
.capability-visual--delivery .cv-stop--3 { left: 58%; animation-delay: -2s; }
.capability-visual--delivery .cv-stop--4 { right: 10%; animation-delay: -3s; }

.capability-index {
    display: inline-block;
    margin-bottom: 18px;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.08em;
    color: var(--accent);
}

.capability-card h3 {
    font-size: clamp(24px, 3vw, 32px);
    line-height: 1.15;
    margin-bottom: 14px;
}

.capability-card p {
    font-size: 16px;
    line-height: 1.75;
    color: var(--text-secondary);
}

.section--fit {
    background: radial-gradient(ellipse 60% 50% at 50% 50%, rgba(41, 151, 255, 0.08) 0%, transparent 70%);
}

.fit-grid {
    max-width: var(--max-width);
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px;
}

.fit-card {
    position: relative;
    overflow: hidden;
    padding: 36px 32px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    background: rgba(255, 255, 255, 0.03);
}

.fit-visual {
    height: 72px;
    margin-bottom: 24px;
    position: relative;
}

.fit-visual--align span {
    position: absolute;
    width: 42px;
    height: 42px;
    border-radius: 12px;
    border: 1px solid rgba(255,255,255,0.08);
    background: rgba(255,255,255,0.03);
    animation: alignShift 7s ease-in-out infinite;
}

.fit-visual--align span:nth-child(1) { left: 0; top: 14px; }
.fit-visual--align span:nth-child(2) { left: 56px; top: 6px; animation-delay: -1.5s; }
.fit-visual--align span:nth-child(3) { left: 112px; top: 18px; animation-delay: -3s; }

.fv-wave,
.fv-focus,
.fv-bridge,
.fv-line,
.fv-block,
.fv-dot {
    position: absolute;
    display: block;
}

.fv-wave {
    inset: 14px 0 14px 0;
    border-radius: 999px;
    background: radial-gradient(circle at 22% 50%, rgba(41,151,255,0.24), transparent 18%),
                radial-gradient(circle at 44% 50%, rgba(41,151,255,0.18), transparent 22%),
                radial-gradient(circle at 66% 50%, rgba(41,151,255,0.12), transparent 26%);
    animation: shimmerPulse 6s ease-in-out infinite;
}

.fv-focus {
    width: 22px;
    height: 22px;
    right: 18%;
    top: 50%;
    transform: translateY(-50%);
    border-radius: 50%;
    border: 1px solid rgba(41,151,255,0.55);
    box-shadow: 0 0 18px rgba(41,151,255,0.22);
}

.fv-block {
    width: 52px;
    height: 52px;
    top: 10px;
    border-radius: 14px;
    border: 1px solid rgba(255,255,255,0.08);
    background: rgba(255,255,255,0.03);
}

.fv-block--1 { left: 0; }
.fv-block--2 { right: 0; }

.fv-bridge {
    left: 56px;
    right: 56px;
    top: 35px;
    height: 1px;
    background: linear-gradient(90deg, rgba(41,151,255,0.08), rgba(41,151,255,0.72), rgba(41,151,255,0.08));
    animation: shimmerLine 4s linear infinite;
}

.fv-dot {
    top: 28px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(41,151,255,0.78);
    box-shadow: 0 0 16px rgba(41,151,255,0.25);
}

.fv-dot--1 { left: 12%; }
.fv-dot--2 { left: 44%; animation: pulseSoft 4s ease-in-out infinite -1s; }
.fv-dot--3 { right: 12%; animation: pulseSoft 4s ease-in-out infinite -2s; }

.fv-line {
    left: 16%;
    right: 16%;
    top: 34px;
    height: 1px;
    background: linear-gradient(90deg, rgba(255,255,255,0.04), rgba(41,151,255,0.62), rgba(255,255,255,0.04));
}

.fit-card h3 {
    font-size: 24px;
    line-height: 1.2;
    margin-bottom: 14px;
}

.fit-card p {
    font-size: 16px;
    line-height: 1.75;
    color: var(--text-secondary);
}

.section--process {
    position: relative;
}

.process-rail {
    max-width: var(--max-width);
    height: 20px;
    margin: -48px auto 40px;
    position: relative;
}

.process-rail span {
    position: absolute;
    left: 5%;
    right: 5%;
    top: 50%;
    height: 1px;
    background: linear-gradient(90deg, rgba(255,255,255,0.03), rgba(41,151,255,0.58), rgba(255,255,255,0.03));
}

.process-rail span::after {
    content: '';
    position: absolute;
    top: -3px;
    left: 0;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: rgba(41,151,255,0.85);
    box-shadow: 0 0 22px rgba(41,151,255,0.3);
    animation: processTravel 8s linear infinite;
}

.process-steps {
    max-width: var(--max-width);
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 20px;
}

.process-step {
    padding: 32px 24px;
    border-top: 1px solid rgba(255,255,255,0.18);
    background: linear-gradient(180deg, rgba(255,255,255,0.03), transparent);
}

.process-step span {
    display: inline-block;
    margin-bottom: 18px;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.08em;
    color: var(--accent);
}

.process-step h3 {
    font-size: 22px;
    line-height: 1.2;
    margin-bottom: 14px;
}

.process-step p {
    font-size: 15px;
    line-height: 1.75;
    color: var(--text-secondary);
}

/* ============================================
   Feature Rows (AOI sections)
   ============================================ */
.feature-row {
    display: flex;
    align-items: center;
    gap: clamp(40px, 8vw, 120px);
    max-width: var(--max-width);
    margin: 0 auto 120px;
    min-height: 500px;
}

.feature-row:last-child {
    margin-bottom: 0;
}

.feature-row--left {
    flex-direction: row-reverse;
}

.feature-visual {
    flex: 1;
    min-width: 0;
    aspect-ratio: 4 / 3;
    background: var(--surface);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    border: 1px solid var(--border);
}

.feature-text {
    flex: 1;
    min-width: 0;
}

.feature-num {
    display: block;
    font-size: 13px;
    font-weight: 500;
    letter-spacing: 0.08em;
    color: var(--accent);
    margin-bottom: 12px;
}

.feature-text h3 {
    font-size: clamp(28px, 3.5vw, 40px);
    font-weight: 600;
    letter-spacing: -0.02em;
    line-height: 1.15;
    margin-bottom: 16px;
    color: var(--text);
}

.feature-text p {
    font-size: 17px;
    line-height: 1.72;
    color: var(--text-secondary);
    margin-bottom: 24px;
    max-width: 520px;
}

.tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tags span {
    display: inline-block;
    font-size: 12px;
    font-weight: 500;
    letter-spacing: 0.02em;
    color: var(--text-secondary);
    padding: 6px 14px;
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border);
}

/* ============================================
   Visual Placeholders
   ============================================ */

/* 01 — Scene demos */
.feature-visual {
    display: flex;
    align-items: center;
    justify-content: center;
}

.feature-visual--target .visual-target-demo,
.feature-visual--quality .visual-quality-demo,
.feature-visual--grid .visual-grid-demo,
.feature-visual--scan .visual-scan-demo {
    opacity: 0.78;
}

.feature-visual--target.in-view .visual-target-demo,
.feature-visual--quality.in-view .visual-quality-demo,
.feature-visual--grid.in-view .visual-grid-demo,
.feature-visual--scan.in-view .visual-scan-demo {
    opacity: 1;
}

.visual-target-demo {
    position: relative;
    width: 220px;
    height: 170px;
}

.target-scene-object {
    position: absolute;
    top: 26px;
    right: 34px;
    width: 24px;
    height: 24px;
    border-radius: 7px;
    background: linear-gradient(135deg, rgba(255,255,255,0.26), rgba(41,151,255,0.5));
    box-shadow: 0 0 18px rgba(41,151,255,0.18);
}

.target-scene-shadow {
    position: absolute;
    top: 96px;
    left: 26px;
    right: 18px;
    height: 46px;
    border-radius: 12px;
    background: linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0.05));
    border: 1px solid rgba(255,255,255,0.05);
}

.target-reticle {
    position: absolute;
    top: 82px;
    left: 26px;
    width: 72px;
    height: 72px;
}

.target-reticle__outer,
.target-reticle__inner {
    position: absolute;
    inset: 0;
    border-radius: 16px;
}

.target-reticle__outer {
    border: 2px solid rgba(255,255,255,0.14);
}

.target-reticle__inner {
    inset: 12px;
    border: 1px solid rgba(41,151,255,0.2);
    border-radius: 10px;
}

.target-reticle__crossh,
.target-reticle__crossv {
    position: absolute;
    background: rgba(255,255,255,0.08);
}

.target-reticle__crossh {
    left: 8px;
    right: 8px;
    top: 50%;
    height: 1px;
}

.target-reticle__crossv {
    top: 8px;
    bottom: 8px;
    left: 50%;
    width: 1px;
}

.target-reticle__dot {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    transform: translate(-50%, -50%);
    background: var(--accent);
    box-shadow: 0 0 18px rgba(41,151,255,0.45);
}

.target-confirm {
    position: absolute;
    top: 30px;
    right: 26px;
    width: 18px;
    height: 10px;
    border-left: 2px solid rgba(41,151,255,0.9);
    border-bottom: 2px solid rgba(41,151,255,0.9);
    transform: rotate(-45deg) scale(0.8);
    opacity: 0;
}

.visual-quality-demo {
    position: relative;
    width: 220px;
    height: 170px;
}

.quality-lane {
    position: absolute;
    left: 24px;
    right: 24px;
    top: 60px;
    height: 54px;
    border-radius: 16px;
    background: linear-gradient(180deg, rgba(255,255,255,0.03), rgba(255,255,255,0.05));
    border: 1px solid rgba(255,255,255,0.08);
}

.quality-item {
    position: absolute;
    top: 74px;
    width: 28px;
    height: 28px;
    border-radius: 9px;
    background: rgba(255,255,255,0.1);
    border: 1px solid rgba(255,255,255,0.08);
    box-shadow: inset 0 0 10px rgba(255,255,255,0.02);
}

.quality-item::before {
    content: "";
    position: absolute;
    inset: 6px;
    border-radius: 5px;
    background: rgba(41,151,255,0.18);
}

.quality-item--1 { left: 42px; }
.quality-item--2 { left: 82px; }
.quality-item--3 { left: 122px; }
.quality-item--4 { left: 162px; }

.quality-item--abnormal {
    transform: translateY(-12px) scale(1.06);
}

.quality-item--abnormal::before {
    inset: 5px 8px 9px 4px;
    border-radius: 4px;
    background: rgba(41,151,255,0.26);
}

.quality-scan-box {
    position: absolute;
    top: 66px;
    left: 34px;
    width: 44px;
    height: 44px;
    border-radius: 12px;
    border: 2px solid rgba(41,151,255,0.42);
    background: rgba(41,151,255,0.05);
    box-shadow: 0 0 18px rgba(41,151,255,0.12);
    opacity: 0;
}

.quality-focus-ring {
    position: absolute;
    top: 54px;
    left: 156px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    border: 2px solid rgba(41,151,255,0.24);
    opacity: 0;
    transform: scale(0.7);
}

.quality-focus-dot {
    position: absolute;
    top: 72px;
    left: 176px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(41,151,255,1);
    box-shadow: 0 0 18px rgba(41,151,255,0.58);
    opacity: 0;
}

.visual-grid-demo {
    position: relative;
    width: 220px;
    height: 170px;
}

.assembly-slot {
    position: absolute;
    width: 44px;
    height: 44px;
    border-radius: 10px;
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.07);
    box-shadow: inset 0 0 14px rgba(255,255,255,0.02);
}

.assembly-slot::before {
    content: "";
    position: absolute;
    inset: 9px;
    border-radius: 6px;
    background: rgba(41,151,255,0.16);
}

.assembly-slot--1 { top: 36px; left: 40px; }
.assembly-slot--2 { top: 36px; left: 98px; }
.assembly-slot--3 { top: 36px; left: 156px; }
.assembly-slot--4 { top: 94px; left: 98px; }

.assembly-slot--missing::before {
    background: transparent;
    border: 1px dashed rgba(41,151,255,0.22);
}

.assembly-cursor {
    position: absolute;
    top: 28px;
    left: 32px;
    width: 60px;
    height: 60px;
    border-radius: 14px;
    border: 2px solid rgba(41,151,255,0.42);
    background: rgba(41,151,255,0.05);
    box-shadow: 0 0 20px rgba(41,151,255,0.12);
    opacity: 0;
}

.assembly-highlight {
    position: absolute;
    top: 90px;
    left: 94px;
    width: 52px;
    height: 52px;
    border-radius: 12px;
    border: 2px solid rgba(41,151,255,0.5);
    box-shadow: 0 0 18px rgba(41,151,255,0.2);
    opacity: 0;
    transform: scale(0.86);
}

.visual-scan-demo {
    position: relative;
    width: 220px;
    height: 170px;
}

.scan-surface {
    position: absolute;
    inset: 18px;
    border-radius: 14px;
    background: linear-gradient(180deg, rgba(255,255,255,0.03), rgba(255,255,255,0.05));
    border: 1px solid rgba(255,255,255,0.07);
}

.scan-texture {
    position: absolute;
    height: 10px;
    border-radius: 999px;
    background: rgba(255,255,255,0.09);
}

.scan-texture--1 {
    top: 60px;
    left: 48px;
    width: 74px;
}

.scan-texture--2 {
    top: 102px;
    left: 54px;
    width: 98px;
}

.scan-defect {
    position: absolute;
    top: 78px;
    right: 56px;
    width: 18px;
    height: 18px;
    border-radius: 6px;
    background: rgba(41,151,255,0.12);
    box-shadow: inset 0 0 8px rgba(41,151,255,0.18);
}

.scan-trace {
    position: absolute;
    left: 26px;
    right: 26px;
    top: 34px;
    height: 3px;
    border-radius: 999px;
    background: linear-gradient(90deg, transparent, rgba(41,151,255,0.38), transparent);
}

.scan-focus-box {
    position: absolute;
    top: 72px;
    right: 50px;
    width: 32px;
    height: 32px;
    border-radius: 8px;
    border: 2px solid rgba(41,151,255,0.48);
    box-shadow: 0 0 18px rgba(41,151,255,0.18);
    opacity: 0;
    transform: scale(0.82);
}

.scan-ping {
    position: absolute;
    top: 82px;
    right: 62px;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: rgba(41,151,255,0.92);
    box-shadow: 0 0 18px rgba(41,151,255,0.35);
    opacity: 0;
}

.feature-visual--target.in-view .target-scene-object {
    animation: demoTargetObject 4.2s ease-in-out infinite;
}

.feature-visual--target.in-view .target-reticle {
    animation: demoTargetReticle 4.2s ease-in-out infinite;
}

.feature-visual--target.in-view .target-reticle__outer {
    animation: demoTargetRing 4.2s ease-in-out infinite;
}

.feature-visual--target.in-view .target-reticle__inner,
.feature-visual--target.in-view .target-reticle__crossh,
.feature-visual--target.in-view .target-reticle__crossv,
.feature-visual--target.in-view .target-reticle__dot {
    animation: demoTargetFocus 4.2s ease-in-out infinite;
}

.feature-visual--target.in-view .target-confirm {
    animation: demoTargetConfirm 4.2s ease-in-out infinite;
}

.feature-visual--quality.in-view .quality-scan-box {
    animation: demoQualityScanBox 4.2s ease-in-out infinite;
}

.feature-visual--quality.in-view .quality-item--1,
.feature-visual--quality.in-view .quality-item--2,
.feature-visual--quality.in-view .quality-item--3 {
    animation: demoQualityItemOk 4.2s ease-in-out infinite;
}

.feature-visual--quality.in-view .quality-item--1 { animation-delay: 0.34s; }
.feature-visual--quality.in-view .quality-item--2 { animation-delay: 0.94s; }
.feature-visual--quality.in-view .quality-item--3 { animation-delay: 1.54s; }

.feature-visual--quality.in-view .quality-item--abnormal {
    animation: demoQualityItemBad 4.2s ease-in-out infinite;
}

.feature-visual--quality.in-view .quality-focus-ring {
    animation: demoQualityRing 4.2s ease-in-out infinite;
}

.feature-visual--quality.in-view .quality-focus-dot {
    animation: demoQualityAlert 4.2s ease-in-out infinite;
}

.feature-visual--grid.in-view .assembly-cursor {
    animation: demoAssemblyCursor 4.2s ease-in-out infinite;
}

.feature-visual--grid.in-view .assembly-slot--1,
.feature-visual--grid.in-view .assembly-slot--2,
.feature-visual--grid.in-view .assembly-slot--3 {
    animation: demoAssemblySlotOk 4.2s ease-in-out infinite;
}

.feature-visual--grid.in-view .assembly-slot--1 { animation-delay: 0.32s; }
.feature-visual--grid.in-view .assembly-slot--2 { animation-delay: 0.92s; }
.feature-visual--grid.in-view .assembly-slot--3 { animation-delay: 1.52s; }
.feature-visual--grid.in-view .assembly-slot--missing {
    animation: demoAssemblyMissing 4.2s ease-in-out infinite;
}

.feature-visual--grid.in-view .assembly-highlight {
    animation: demoAssemblyHighlight 4.2s ease-in-out infinite;
}

.feature-visual--scan.in-view .scan-trace {
    animation: demoScanTrace 4.2s ease-in-out infinite;
}

.feature-visual--scan.in-view .scan-focus-box {
    animation: demoScanFocus 4.2s ease-in-out infinite;
}

.feature-visual--scan.in-view .scan-ping {
    animation: demoScanPing 4.2s ease-in-out infinite;
}

@keyframes floatSoft {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

@keyframes pulseSoft {
    0%, 100% { transform: scale(1); opacity: 0.82; }
    50% { transform: scale(1.08); opacity: 1; }
}

@keyframes demoTargetObject {
    0%, 100% { opacity: 0.28; transform: scale(0.86); }
    18%, 84% { opacity: 1; transform: scale(1); }
}

@keyframes demoTargetReticle {
    0%, 14%, 100% { transform: translate(0, 0); }
    36%, 84% { transform: translate(108px, -58px); }
}

@keyframes demoTargetRing {
    0%, 34%, 100% { opacity: 0.42; }
    48% { opacity: 1; transform: scale(0.88); }
    64% { opacity: 0.84; transform: scale(0.94); }
}

@keyframes demoTargetFocus {
    0%, 30%, 100% { opacity: 0.24; }
    48% { opacity: 1; }
    64% { opacity: 0.72; }
}

@keyframes demoTargetConfirm {
    0%, 54%, 100% { opacity: 0; transform: rotate(-45deg) scale(0.6); }
    64%, 84% { opacity: 1; transform: rotate(-45deg) scale(1); }
}

@keyframes demoQualityScanBox {
    0%, 8%, 100% { opacity: 0; transform: translate(0, 0); }
    18%, 28% { opacity: 1; transform: translate(0, 0); }
    36%, 46% { opacity: 1; transform: translate(40px, 0); }
    54%, 64% { opacity: 1; transform: translate(80px, 0); }
    72%, 92% { opacity: 1; transform: translate(120px, -12px); }
}

@keyframes demoQualityItemOk {
    0%, 100% { box-shadow: inset 0 0 10px rgba(255,255,255,0.02); }
    18% { box-shadow: 0 0 16px rgba(41,151,255,0.16), inset 0 0 10px rgba(41,151,255,0.08); }
    30% { box-shadow: inset 0 0 10px rgba(255,255,255,0.02); }
}

@keyframes demoQualityItemBad {
    0%, 54%, 100% { transform: translateY(-12px) scale(1.06); box-shadow: inset 0 0 10px rgba(255,255,255,0.02); }
    70% { transform: translateY(-18px) scale(1.12); box-shadow: 0 0 18px rgba(41,151,255,0.2), inset 0 0 12px rgba(41,151,255,0.12); }
    86% { transform: translateY(-14px) scale(1.08); }
}

@keyframes demoQualityRing {
    0%, 58%, 100% { opacity: 0; transform: scale(0.7); }
    74% { opacity: 1; transform: scale(1.16); }
    90% { opacity: 0.62; transform: scale(1.04); }
}

@keyframes demoQualityAlert {
    0%, 64%, 100% { opacity: 0; transform: scale(0.58); }
    78%, 94% { opacity: 1; transform: scale(1.08); }
}

@keyframes demoAssemblyCursor {
    0%, 10%, 100% { opacity: 0; transform: translate(0, 0); }
    18%, 26% { opacity: 1; transform: translate(0, 0); }
    34%, 42% { opacity: 1; transform: translate(58px, 0); }
    50%, 58% { opacity: 1; transform: translate(116px, 0); }
    66%, 82% { opacity: 1; transform: translate(58px, 58px); }
    90% { opacity: 0; transform: translate(58px, 58px); }
}

@keyframes demoAssemblySlotOk {
    0%, 100% { box-shadow: inset 0 0 14px rgba(255,255,255,0.02); }
    18% { box-shadow: 0 0 16px rgba(41,151,255,0.16), inset 0 0 14px rgba(41,151,255,0.08); }
    30% { box-shadow: inset 0 0 14px rgba(255,255,255,0.02); }
}

@keyframes demoAssemblyMissing {
    0%, 54%, 100% { transform: scale(1); }
    68% { transform: scale(1.06); box-shadow: inset 0 0 18px rgba(41,151,255,0.12), 0 0 18px rgba(41,151,255,0.16); }
    84% { transform: scale(1.02); }
}

@keyframes demoAssemblyHighlight {
    0%, 60%, 100% { opacity: 0; transform: scale(0.82); }
    72%, 88% { opacity: 1; transform: scale(1); }
}

@keyframes demoScanTrace {
    0%, 100% { transform: translateY(0); opacity: 0.18; }
    14% { opacity: 1; }
    58% { transform: translateY(64px); opacity: 1; }
    74% { opacity: 0.46; }
}

@keyframes demoScanFocus {
    0%, 52%, 100% { opacity: 0; transform: scale(0.82); }
    64% { opacity: 0.42; transform: scale(1); }
    74%, 88% { opacity: 1; transform: scale(1.06); }
}

@keyframes demoScanPing {
    0%, 60%, 100% { opacity: 0; transform: scale(0.5); }
    76%, 88% { opacity: 1; transform: scale(1); }
}

@keyframes shimmerLine {
    0% { opacity: 0.28; }
    50% { opacity: 0.9; }
    100% { opacity: 0.28; }
}

@keyframes shimmerPulse {
    0%, 100% { opacity: 0.42; }
    50% { opacity: 0.95; }
}

@keyframes alignShift {
    0%, 100% { transform: translateY(0); opacity: 0.72; }
    50% { transform: translateY(-6px); opacity: 1; }
}

@keyframes processTravel {
    0% { left: 0; opacity: 0.2; }
    10% { opacity: 1; }
    90% { opacity: 1; }
    100% { left: calc(100% - 8px); opacity: 0.2; }
}

@keyframes cellShimmer {
    0%, 100% { background: rgba(255,255,255,0.04); }
    50% { background: rgba(41,151,255,0.14); }
}

/* ============================================
   SCADA Section
   ============================================ */
.section--scada {
    background: radial-gradient(ellipse 60% 50% at 50% 50%, #0a1628 0%, transparent 70%);
}

.scada-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    max-width: var(--max-width);
    margin: 0 auto;
}

.scada-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 48px 36px;
    text-align: center;
    transition: border-color 0.3s ease, transform 0.3s ease;
}

.scada-card:hover {
    border-color: rgba(255, 255, 255, 0.15);
    transform: translateY(-2px);
}

.scada-icon {
    color: var(--accent);
    margin-bottom: 24px;
    display: flex;
    justify-content: center;
}

.scada-card h4 {
    font-size: 20px;
    font-weight: 600;
    letter-spacing: -0.01em;
    margin-bottom: 10px;
    color: var(--text);
}

.scada-card p {
    font-size: 15px;
    line-height: 1.72;
    color: var(--text-secondary);
    max-width: 280px;
    margin: 0 auto;
}

/* ============================================
   About Section
   ============================================ */
.section--about {
    padding-top: 120px;
}

.about-content {
    max-width: 640px;
    margin: 0 auto;
    text-align: center;
}

.about-content p {
    font-size: 19px;
    line-height: 1.7;
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.about-content p:last-child {
    margin-bottom: 0;
}

/* ============================================
   Contact Section
   ============================================ */
.section--contact {
    padding-bottom: 160px;
}

.contact-content {
    max-width: 640px;
    margin: 0 auto;
    text-align: center;
}

.contact-text {
    font-size: 19px;
    line-height: 1.7;
    color: var(--text-secondary);
    margin-bottom: 32px;
}

.contact-link {
    display: inline-block;
    font-size: 28px;
    font-weight: 500;
    letter-spacing: -0.015em;
    color: var(--accent);
    transition: color 0.2s ease;
}

.contact-link:hover {
    color: #40a9ff;
}

.contact-qr {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
    margin-top: 32px;
}

.contact-qr-image {
    width: min(280px, 72vw);
    aspect-ratio: 1;
    object-fit: cover;
    border-radius: 24px;
    border: 1px solid var(--border);
    background: rgba(255, 255, 255, 0.02);
    padding: 12px;
    box-shadow: 0 24px 80px rgba(0, 0, 0, 0.35);
}

.contact-qr-text {
    font-size: 15px;
    color: var(--text-secondary);
    letter-spacing: 0.02em;
    text-align: center;
}

/* ============================================
   Footer
   ============================================ */
.footer {
    padding: 32px;
    text-align: center;
    border-top: 1px solid var(--border);
}

.footer p {
    font-size: 13px;
    color: var(--text-tertiary);
}

.footer-icp {
    margin-top: 10px;
}

.footer-icp a {
    color: var(--text-secondary);
    transition: color 0.2s ease;
}

.footer-icp a:hover,
.footer-icp a:focus-visible {
    color: var(--text);
}

/* ============================================
   Scroll Reveal Animations
   ============================================ */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s cubic-bezier(0.22, 0.61, 0.36, 1),
                transform 0.8s cubic-bezier(0.22, 0.61, 0.36, 1);
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Stagger delay for feature rows */
.feature-row:nth-child(2).reveal { transition-delay: 0.1s; }
.feature-row:nth-child(3).reveal { transition-delay: 0.2s; }
.feature-row:nth-child(4).reveal { transition-delay: 0.3s; }
.feature-row:nth-child(5).reveal { transition-delay: 0.4s; }

/* Stagger delay for scada cards */
.scada-card:nth-child(1).reveal { transition-delay: 0.1s; }
.scada-card:nth-child(2).reveal { transition-delay: 0.2s; }
.scada-card:nth-child(3).reveal { transition-delay: 0.3s; }

/* Hero initial animation */
.animate-in {
    opacity: 0;
    transform: translateY(30px);
    animation: fadeUp 1s cubic-bezier(0.22, 0.61, 0.36, 1) forwards;
}

.hero-title.animate-in {
    animation-delay: 0.25s;
}

.hero-subtitle.animate-in {
    animation-delay: 0.45s;
}

.hero-description.animate-in {
    animation-delay: 0.65s;
}

@keyframes fadeUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 1024px) {
    :root {
        --section-gap: 100px;
    }

    .process-rail {
        margin: -20px auto 28px;
    }

    .capability-visual,
    .fit-visual {
        height: 76px;
    }

    .capability-grid,
    .fit-grid {
        grid-template-columns: 1fr;
    }

    .process-steps {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .section-lead,
    .hero-description {
        font-size: 17px;
    }

    .feature-row,
    .feature-row--left {
        flex-direction: column;
        gap: 40px;
        min-height: auto;
        margin-bottom: 80px;
    }

    .feature-visual {
        width: 100%;
        aspect-ratio: 16 / 9;
    }

    .feature-text {
        text-align: center;
    }

    .feature-text p {
        max-width: 100%;
    }

    .tags {
        justify-content: center;
    }

    .scada-grid {
        grid-template-columns: 1fr;
        max-width: 400px;
    }

    .page-hero {
        min-height: auto;
        padding-top: calc(var(--nav-height) + 56px);
        padding-bottom: 80px;
    }

    .summary-panel {
        padding: 40px 28px;
    }
}

@media (max-width: 640px) {
    :root {
        --section-gap: 72px;
        --nav-height: 64px;
    }

    .hero-orbit--2 {
        display: none;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: var(--nav-height);
        left: 0;
        right: 0;
        flex-direction: column;
        background: rgba(0, 0, 0, 0.9);
        backdrop-filter: blur(20px);
        padding: 16px 32px;
        gap: 0;
        border-bottom: 1px solid var(--border);
    }

    .nav-links.open {
        display: flex;
    }

    .nav-links a {
        padding: 14px 0;
        font-size: 15px;
        border-bottom: 1px solid var(--border);
    }

    .nav-links a:last-child {
        border-bottom: none;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-logo {
        font-size: 56px;
    }

    .nav-brand span {
        font-size: 14px;
    }

    .hero-brand {
        font-size: clamp(48px, 18vw, 80px);
    }

    .hero-description {
        margin-top: 20px;
        font-size: 16px;
        line-height: 1.7;
    }

    .hero-reticle {
        width: 300px;
        height: 300px;
    }

    .hero-ring--1 {
        width: 400px;
        height: 400px;
    }

    .hero-ring--2 {
        width: 500px;
        height: 500px;
    }

    .section {
        padding-left: 20px;
        padding-right: 20px;
    }

    .section-lead {
        font-size: 16px;
        line-height: 1.7;
    }

    .capability-visual,
    .fit-visual {
        height: 64px;
        margin-bottom: 20px;
    }

    .capability-card,
    .fit-card,
    .process-step {
        padding: 28px 22px;
    }

    .process-rail {
        display: none;
    }

    .capability-visual--system .cv-window--3,
    .capability-visual--network .cv-link--3 {
        display: none;
    }

    .process-steps {
        grid-template-columns: 1fr;
    }

    .about-content p {
        font-size: 16px;
    }

    .contact-link {
        font-size: 22px;
    }

    .contact-qr {
        gap: 16px;
    }

    .contact-qr-image {
        width: min(240px, 78vw);
        padding: 10px;
        border-radius: 20px;
    }

    .hero-actions,
    .summary-actions {
        gap: 12px;
        margin-top: 24px;
    }

    .button {
        width: 100%;
    }

    .page-hero {
        padding-left: 20px;
        padding-right: 20px;
        padding-bottom: 64px;
    }

    .page-hero__lead {
        font-size: 16px;
        line-height: 1.7;
    }

    .summary-panel {
        padding: 32px 22px;
    }