/* ========== Reset & Variables ========== */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
    background: #FFFFFF;
    color: #0F172A;
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

:root {
    --bg-deep: #FFFFFF;
    --bg-dark: #F5F8FC;
    --bg-card: #FFFFFF;
    --bg-soft: #F0F5FB;
    --primary: #0066FF;
    --secondary: #00C896;
    --accent: #6366F1;
    --text: #0F172A;
    --text-dim: #475569;
    --text-mute: #94A3B8;
    --border: #E2E8F0;
    --border-hover: rgba(0, 102, 255, 0.3);
    --grad-primary: linear-gradient(135deg, #0066FF 0%, #00C896 100%);
    --grad-accent: linear-gradient(135deg, #6366F1 0%, #0066FF 100%);
    --grad-soft: linear-gradient(180deg, #FFFFFF 0%, #F5F8FC 100%);
    --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.04);
    --shadow-md: 0 4px 24px rgba(15, 23, 42, 0.06);
    --shadow-lg: 0 12px 40px rgba(0, 102, 255, 0.12);
    --shadow-xl: 0 20px 60px rgba(0, 102, 255, 0.15);
}

a { color: inherit; text-decoration: none; transition: color 0.3s; }
ul { list-style: none; }
img { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, textarea, select { font-family: inherit; outline: none; }

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 32px;
    position: relative;
    z-index: 2;
}

.gradient-text {
    background: var(--grad-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.highlight {
    color: var(--primary);
    font-weight: 600;
}

/* ========== Navbar ========== */
.navbar {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 100;
    padding: 18px 0;
    background: rgba(255, 255, 255, 0.75);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(226, 232, 240, 0.6);
    transition: all 0.3s;
}
.navbar.scrolled {
    padding: 12px 0;
    background: rgba(255, 255, 255, 0.95);
    box-shadow: 0 2px 12px rgba(15, 23, 42, 0.04);
}
.nav-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 32px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 700;
    font-size: 20px;
}
.logo-img {
    height: 42px;
    width: auto;
    display: block;
    transition: transform 0.3s;
}
.logo:hover .logo-img { transform: scale(1.06); }
.navbar.scrolled .logo-img { height: 36px; }
.logo-img-footer { height: 48px; }
.logo-text {
    background: var(--grad-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: 2px;
    font-weight: 800;
}
.nav-menu {
    display: flex;
    gap: 4px;
}
.nav-link {
    padding: 8px 16px;
    font-size: 14px;
    color: var(--text-dim);
    position: relative;
    border-radius: 8px;
    transition: all 0.3s;
    font-weight: 500;
}
.nav-link:hover, .nav-link.active {
    color: var(--primary);
    background: rgba(0, 102, 255, 0.06);
}
.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 50%;
    transform: translateX(-50%);
    width: 16px;
    height: 2px;
    background: var(--grad-primary);
    border-radius: 2px;
}
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}
.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--primary);
    transition: all 0.3s;
}

/* ========== Hero ========== */
.hero {
    position: relative;
    min-height: 100vh;
    padding: 120px 0 80px;
    display: flex;
    align-items: center;
    overflow: hidden;
    background:
        radial-gradient(ellipse 800px 600px at 20% 30%, rgba(0, 102, 255, 0.10) 0%, transparent 60%),
        radial-gradient(ellipse 800px 600px at 80% 70%, rgba(0, 200, 150, 0.08) 0%, transparent 60%),
        linear-gradient(180deg, #FFFFFF 0%, #F5F8FC 100%);
}
#particleCanvas {
    position: absolute;
    inset: 0;
    z-index: 1;
}
.hero-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(0, 102, 255, 0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 102, 255, 0.04) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
    z-index: 1;
}
.hero-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 32px;
    display: grid;
    grid-template-columns: 1.1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 2;
}
.hero-content { animation: fadeInUp 1s ease-out; }
.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: rgba(0, 102, 255, 0.06);
    border: 1px solid rgba(0, 102, 255, 0.15);
    border-radius: 100px;
    color: var(--primary);
    font-size: 13px;
    margin-bottom: 28px;
    font-weight: 500;
}
.badge-dot {
    width: 6px;
    height: 6px;
    background: var(--secondary);
    border-radius: 50%;
    animation: pulse 2s infinite;
    box-shadow: 0 0 8px var(--secondary);
}
.hero-title {
    font-size: 72px;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 20px;
    letter-spacing: 2px;
    color: var(--text);
}
.title-line { display: inline-block; }
.title-divider {
    display: inline-block;
    margin: 0 16px;
    color: var(--primary);
    transform: translateY(-8px);
    font-weight: 300;
    animation: pulse 2s infinite;
}
.hero-subtitle {
    font-size: 22px;
    color: var(--text);
    margin-bottom: 16px;
    font-weight: 500;
    letter-spacing: 2px;
}
.hero-desc {
    font-size: 15px;
    color: var(--text-dim);
    margin-bottom: 36px;
    max-width: 540px;
    line-height: 1.8;
}
.hero-desc em {
    font-style: normal;
    color: var(--text);
    font-weight: 500;
}
.hero-actions {
    display: flex;
    gap: 16px;
    margin-bottom: 40px;
}
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    border-radius: 10px;
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 1px;
    transition: all 0.3s;
    cursor: pointer;
    text-decoration: none;
    border: none;
}
.btn-primary {
    background: var(--grad-primary);
    color: #FFFFFF;
    box-shadow: 0 8px 24px rgba(0, 102, 255, 0.25);
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 36px rgba(0, 102, 255, 0.4);
}
.btn-secondary {
    background: #FFFFFF;
    color: var(--primary);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
}
.btn-secondary:hover {
    background: rgba(0, 102, 255, 0.04);
    border-color: var(--primary);
    transform: translateY(-2px);
}
.btn-full { width: 100%; justify-content: center; }
.hero-tags {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}
.tag {
    padding: 6px 14px;
    font-size: 12px;
    color: var(--text-dim);
    background: #FFFFFF;
    border: 1px solid var(--border);
    border-radius: 8px;
    transition: all 0.3s;
    box-shadow: var(--shadow-sm);
}
.tag:hover {
    color: var(--primary);
    border-color: var(--primary);
    transform: translateY(-2px);
}

/* Hero Visual - 能源球体 */
.hero-visual {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 500px;
}
.energy-sphere {
    position: relative;
    width: 400px;
    height: 400px;
}
.sphere-ring {
    position: absolute;
    border-radius: 50%;
    border: 1px solid rgba(0, 102, 255, 0.25);
    top: 50%; left: 50%;
}
.ring-1 {
    width: 100%; height: 100%;
    transform: translate(-50%, -50%);
    animation: rotate 20s linear infinite;
    border-top-color: var(--primary);
}
.ring-2 {
    width: 80%; height: 80%;
    transform: translate(-50%, -50%);
    animation: rotateReverse 15s linear infinite;
    border-color: rgba(0, 200, 150, 0.25);
    border-right-color: var(--secondary);
}
.ring-3 {
    width: 60%; height: 60%;
    transform: translate(-50%, -50%);
    animation: rotate 12s linear infinite;
    border-color: rgba(99, 102, 241, 0.25);
    border-left-color: var(--accent);
}
.sphere-core {
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    width: 70%; height: 70%;
    animation: float 6s ease-in-out infinite;
    filter: drop-shadow(0 8px 32px rgba(0, 102, 255, 0.25));
}
.sphere-core svg { animation: rotate 30s linear infinite; }
.float-node {
    position: absolute;
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 14px 22px;
    background: #FFFFFF;
    backdrop-filter: blur(10px);
    border: 1px solid var(--border);
    border-radius: 14px;
    font-size: 17px;
    color: var(--text);
    font-weight: 600;
    box-shadow: 0 10px 28px rgba(0, 102, 255, 0.15);
}
.float-node svg { width: 32px; height: 32px; }
.node-1 { top: 8%; right: 2%; animation: floatNode 4s ease-in-out infinite; }
.node-2 { top: 32%; left: -6%; animation: floatNode 5s ease-in-out infinite 0.5s; }
.node-3 { bottom: 22%; right: -4%; animation: floatNode 4.5s ease-in-out infinite 1s; }
.node-4 { bottom: 4%; left: 6%; animation: floatNode 5.5s ease-in-out infinite 1.5s; }

.hero-scroll {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--text-mute);
    font-size: 11px;
    letter-spacing: 2px;
    z-index: 2;
}
.scroll-arrow {
    width: 20px;
    height: 30px;
    border: 1.5px solid var(--text-mute);
    border-radius: 10px;
    position: relative;
}
.scroll-arrow::after {
    content: '';
    position: absolute;
    top: 6px;
    left: 50%;
    transform: translateX(-50%);
    width: 3px;
    height: 6px;
    background: var(--primary);
    border-radius: 2px;
    animation: scrollDown 2s infinite;
}

/* ========== Sections ========== */
.section {
    padding: 90px 0 110px;
    position: relative;
}
.section-dark {
    background: linear-gradient(180deg, #F5F8FC 0%, #ECF2F9 50%, #F5F8FC 100%);
    overflow: hidden;
}
.bg-glow {
    position: absolute;
    border-radius: 50%;
    filter: blur(120px);
    opacity: 0.18;
    pointer-events: none;
}
.bg-glow-1 { top: 10%; left: -10%; width: 400px; height: 400px; background: var(--primary); }
.bg-glow-2 { bottom: 10%; right: -10%; width: 500px; height: 500px; background: var(--secondary); }
.bg-glow-3 { top: 30%; right: 20%; width: 350px; height: 350px; background: var(--accent); }

.section-header {
    text-align: center;
    margin-bottom: 64px;
}
.section-tag {
    display: inline-block;
    padding: 4px 12px;
    font-size: 11px;
    letter-spacing: 4px;
    color: var(--primary);
    background: rgba(0, 102, 255, 0.06);
    border: 1px solid rgba(0, 102, 255, 0.15);
    border-radius: 4px;
    margin-bottom: 16px;
    font-weight: 600;
}
.section-title {
    font-size: 48px;
    font-weight: 700;
    letter-spacing: 2px;
    margin-bottom: 16px;
    color: var(--text);
}
.section-desc {
    color: var(--text-dim);
    font-size: 16px;
    max-width: 600px;
    margin: 0 auto;
}
.section-line {
    width: 60px;
    height: 3px;
    background: var(--grad-primary);
    margin: 24px auto 0;
    border-radius: 2px;
    box-shadow: 0 2px 8px rgba(0, 102, 255, 0.25);
}

/* ========== About ========== */
.about-grid {
    display: grid;
    grid-template-columns: 1.3fr 1fr;
    gap: 60px;
    align-items: start;
}
.about-lead {
    font-size: 18px;
    line-height: 1.8;
    margin-bottom: 24px;
    color: var(--text);
}
.about-lead strong { color: var(--primary); font-weight: 600; }
.about-para {
    font-size: 15px;
    color: var(--text-dim);
    line-height: 1.9;
    margin-bottom: 36px;
}
.about-para strong { color: var(--secondary); }
.about-quad {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}
.about-quad .quad-item:nth-child(5) {
    grid-column: 1 / -1;
    justify-content: center;
}
.quad-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px 24px;
    background: #FFFFFF;
    border: 1px solid var(--border);
    border-radius: 12px;
    transition: all 0.3s;
    box-shadow: var(--shadow-sm);
}
.quad-item:hover {
    background: #FFFFFF;
    border-color: var(--primary);
    transform: translateY(-4px);
    box-shadow: 0 10px 28px rgba(0, 102, 255, 0.1);
}
.quad-num {
    font-size: 26px;
    font-weight: 800;
    background: var(--grad-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-family: 'Orbitron', monospace;
}
.quad-text {
    font-size: 15px;
    color: var(--text);
    font-weight: 600;
}

.about-visions {
    padding: 32px;
    background: linear-gradient(135deg, rgba(0, 102, 255, 0.04) 0%, rgba(0, 200, 150, 0.03) 100%);
    border: 1px solid var(--border);
    border-radius: 20px;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-md);
}
.about-visions::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: var(--grad-primary);
}
.visions-title {
    font-size: 20px;
    margin-bottom: 24px;
    color: var(--text);
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border);
    font-weight: 700;
}
.vision-card {
    display: flex;
    gap: 16px;
    padding: 20px 0;
    border-bottom: 1px dashed var(--border);
}
.vision-card:last-child { border-bottom: none; padding-bottom: 0; }
.vision-card:first-of-type { padding-top: 0; }
.vision-icon {
    flex-shrink: 0;
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, rgba(0, 102, 255, 0.10) 0%, rgba(0, 200, 150, 0.08) 100%);
    border: 1px solid var(--border);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 12px;
}
.vision-icon svg { width: 100%; height: 100%; display: block; }
.vision-body h4 {
    font-size: 16px;
    color: var(--primary);
    margin-bottom: 6px;
    font-weight: 700;
}
.vision-body p {
    font-size: 13px;
    color: var(--text-dim);
    line-height: 1.6;
}

/* ========== Business ========== */
.business-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 24px;
    margin-bottom: 60px;
}
.business-card { grid-column: span 2; }
.business-card:nth-child(4) { grid-column: 2 / span 2; }
.business-card:nth-child(5) { grid-column: 4 / span 2; }

.business-card {
    position: relative;
    padding: 40px 36px;
    background: #FFFFFF;
    border: 1px solid var(--border);
    border-radius: 20px;
    overflow: hidden;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: var(--shadow-sm);
}
.business-card:hover {
    transform: translateY(-8px);
    border-color: rgba(0, 102, 255, 0.3);
    box-shadow: var(--shadow-xl);
}
.card-glow {
    position: absolute;
    top: -50%;
    right: -50%;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle, rgba(0, 102, 255, 0.10) 0%, transparent 70%);
    opacity: 0;
    transition: opacity 0.4s;
}
.business-card:hover .card-glow { opacity: 1; }
.card-num {
    position: absolute;
    top: 20px;
    right: 28px;
    font-size: 56px;
    font-weight: 800;
    background: var(--grad-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    opacity: 0.18;
    font-family: 'Orbitron', monospace;
    letter-spacing: 2px;
    transition: opacity 0.4s;
}
.business-card:hover .card-num {
    opacity: 0.45;
}
.card-icon {
    width: 80px;
    height: 80px;
    margin-bottom: 24px;
    padding: 14px;
    background: linear-gradient(135deg, rgba(0, 102, 255, 0.06) 0%, rgba(0, 200, 150, 0.04) 100%);
    border: 1px solid var(--border);
    border-radius: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.card-title {
    font-size: 22px;
    margin-bottom: 12px;
    color: var(--text);
    font-weight: 700;
    letter-spacing: 1px;
}
.card-desc {
    color: var(--text-dim);
    font-size: 14px;
    line-height: 1.7;
    margin-bottom: 20px;
}
.card-list {
    padding-top: 20px;
    border-top: 1px dashed var(--border);
}
.card-list li {
    padding: 8px 0 8px 20px;
    color: var(--text-dim);
    font-size: 13px;
    position: relative;
}
.card-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 6px;
    height: 6px;
    background: var(--grad-primary);
    border-radius: 50%;
}

.business-banner {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 24px;
    padding: 28px;
    background: linear-gradient(90deg, rgba(0, 102, 255, 0.06) 0%, rgba(0, 200, 150, 0.06) 100%);
    border: 1px solid var(--border);
    border-radius: 16px;
    text-align: center;
}
.business-banner p {
    font-size: 18px;
    font-weight: 700;
    letter-spacing: 2px;
    color: var(--text);
}
.banner-line {
    flex: 1;
    max-width: 100px;
    height: 1px;
    background: var(--grad-primary);
}

/* ========== Capability ========== */
.capability-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}
.cap-item {
    text-align: center;
    padding: 36px 24px;
    background: #FFFFFF;
    border: 1px solid var(--border);
    border-radius: 20px;
    transition: all 0.4s;
    position: relative;
    box-shadow: var(--shadow-sm);
}
.cap-item:hover {
    border-color: rgba(0, 102, 255, 0.3);
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}
.cap-hex {
    width: 100px;
    height: 100px;
    margin: 0 auto 20px;
    filter: drop-shadow(0 6px 16px rgba(0, 102, 255, 0.2));
    transition: transform 0.4s;
}
.cap-item:hover .cap-hex { transform: rotate(60deg) scale(1.05); }
.cap-item h4 {
    font-size: 18px;
    color: var(--text);
    margin-bottom: 12px;
    font-weight: 700;
}
.cap-item p {
    color: var(--text-dim);
    font-size: 13px;
    line-height: 1.7;
}

/* ========== Solution ========== */
.solution-tabs { max-width: 1100px; margin: 0 auto; }
.tab-nav {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
    margin-bottom: 40px;
}
.tab-btn {
    padding: 20px;
    background: #FFFFFF;
    border: 1px solid var(--border);
    border-radius: 14px;
    text-align: left;
    transition: all 0.3s;
    color: var(--text-dim);
    box-shadow: var(--shadow-sm);
}
.tab-btn:hover {
    border-color: var(--primary);
    transform: translateY(-2px);
}
.tab-btn.active {
    background: var(--grad-primary);
    border-color: transparent;
    color: #FFFFFF;
    box-shadow: 0 12px 28px rgba(0, 102, 255, 0.3);
}
.tab-num {
    display: block;
    font-size: 12px;
    color: var(--primary);
    margin-bottom: 8px;
    letter-spacing: 2px;
    font-family: 'Orbitron', monospace;
    font-weight: 700;
}
.tab-btn.active .tab-num { color: rgba(255, 255, 255, 0.85); }
.tab-text {
    display: block;
    font-size: 15px;
    font-weight: 600;
    letter-spacing: 1px;
}

.tab-panel { display: none; }
.tab-panel.active { display: block; animation: fadeIn 0.5s; }
.panel-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    padding: 48px;
    background: #FFFFFF;
    border: 1px solid var(--border);
    border-radius: 24px;
    box-shadow: var(--shadow-md);
}
.panel-info h3 {
    font-size: 28px;
    margin-bottom: 16px;
    color: var(--text);
    letter-spacing: 1px;
    font-weight: 700;
}
.panel-lead {
    color: var(--text-dim);
    font-size: 15px;
    margin-bottom: 28px;
    line-height: 1.8;
}
.panel-features li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 0;
    border-bottom: 1px dashed var(--border);
    color: var(--text);
    font-size: 14px;
}
.panel-features li:last-child { border-bottom: none; }
.dot {
    width: 8px;
    height: 8px;
    background: var(--grad-primary);
    border-radius: 50%;
    box-shadow: 0 2px 6px rgba(0, 102, 255, 0.3);
    flex-shrink: 0;
}
.panel-link {
    display: inline-block;
    margin-top: 24px;
    color: var(--primary);
    font-size: 14px;
    letter-spacing: 1px;
    transition: all 0.3s;
    font-weight: 600;
}
.panel-link:hover { color: var(--secondary); transform: translateX(4px); }
.panel-visual {
    padding: 24px;
    background: linear-gradient(135deg, #F5F8FC 0%, #ECF2F9 100%);
    border: 1px solid var(--border);
    border-radius: 18px;
}

/* SVG 在亮色版下需要调整颜色：把白底改深，但保留渐变 */
.panel-visual svg text { fill: var(--text-dim) !important; }

/* ========== Data ========== */
.section-data {
    background: linear-gradient(180deg, #FFFFFF 0%, #F0F5FB 50%, #FFFFFF 100%);
    position: relative;
    overflow: hidden;
}
.data-bg {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(0, 102, 255, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 102, 255, 0.05) 1px, transparent 1px);
    background-size: 40px 40px;
    mask-image: radial-gradient(ellipse at center, black 20%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 20%, transparent 70%);
    pointer-events: none;
}
.data-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
}
.data-card {
    text-align: center;
    padding: 48px 24px;
    background: #FFFFFF;
    border: 1px solid var(--border);
    border-radius: 20px;
    transition: all 0.4s;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}
.data-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: var(--grad-primary);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.6s;
}
.data-card:hover::before { transform: scaleX(1); }
.data-card:hover {
    transform: translateY(-8px);
    border-color: rgba(0, 102, 255, 0.3);
    box-shadow: var(--shadow-xl);
}
.data-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto 20px;
    padding: 12px;
    background: rgba(0, 102, 255, 0.06);
    border-radius: 50%;
    filter: drop-shadow(0 4px 8px rgba(0, 102, 255, 0.15));
}
.data-number {
    font-size: 56px;
    font-weight: 800;
    background: var(--grad-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 12px;
    font-family: 'Orbitron', monospace;
    line-height: 1;
    letter-spacing: 1px;
}
.data-unit {
    font-size: 24px;
    margin-left: 4px;
}
.data-label {
    color: var(--text-dim);
    font-size: 14px;
    letter-spacing: 1px;
    font-weight: 500;
}
.data-note {
    text-align: center;
    color: var(--text-mute);
    font-size: 12px;
    margin-top: 40px;
    font-style: italic;
}

/* ========== Chairman ========== */
.chairman-block {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 60px;
    align-items: start;
    max-width: 1100px;
    margin: 0 auto;
    padding: 56px;
    background: linear-gradient(135deg, #FFFFFF 0%, #F5F8FC 100%);
    border: 1px solid var(--border);
    border-radius: 24px;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-md);
}
.chairman-block::before, .chairman-block::after {
    content: '';
    position: absolute;
    width: 200px; height: 200px;
    background: var(--primary);
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.10;
}
.chairman-block::before { top: -80px; left: -80px; }
.chairman-block::after { bottom: -80px; right: -80px; background: var(--secondary); }
.chairman-avatar { text-align: center; position: relative; z-index: 2; }
.avatar-frame {
    position: relative;
    width: 200px;
    height: 200px;
    margin: 0 auto 20px;
}
.avatar-pulse {
    position: absolute;
    inset: -8px;
    border: 2px solid var(--primary);
    border-radius: 50%;
    opacity: 0;
    animation: avatarPulse 2s ease-out infinite;
}
.chairman-name {
    font-size: 22px;
    color: var(--text);
    margin-bottom: 6px;
    letter-spacing: 2px;
    font-weight: 700;
}
.chairman-title {
    color: var(--text-dim);
    font-size: 13px;
    letter-spacing: 1px;
}

.chairman-words {
    position: relative;
    padding-left: 32px;
    z-index: 2;
}
.quote-mark {
    position: absolute;
    top: -20px;
    left: 0;
    font-size: 80px;
    color: var(--primary);
    opacity: 0.25;
    font-family: Georgia, serif;
    line-height: 1;
}
.chairman-para {
    font-size: 16px;
    color: var(--text);
    line-height: 2;
    margin-bottom: 20px;
}
.chairman-para strong { color: var(--primary); }
.quote-sign {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-top: 32px;
    color: var(--text-dim);
    font-size: 13px;
}
.sign-line {
    width: 40px;
    height: 1px;
    background: var(--grad-primary);
}

/* ========== Partners ========== */
.partners-wall {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 20px;
}
.partner-logo {
    height: 88px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #FFFFFF;
    border: 1px solid var(--border);
    border-radius: 12px;
    color: var(--text-mute);
    font-size: 14px;
    letter-spacing: 2px;
    transition: all 0.3s;
    box-shadow: var(--shadow-sm);
    font-weight: 500;
}
.partner-logo:hover {
    color: var(--primary);
    border-color: var(--primary);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

/* ========== Contact ========== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.3fr;
    gap: 60px;
    max-width: 1100px;
    margin: 0 auto;
}
.contact-info { padding-top: 20px; }
.info-item {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 24px 0;
    border-bottom: 1px dashed var(--border);
}
.info-item:last-child { border-bottom: none; }
.info-icon {
    flex-shrink: 0;
    width: 56px;
    height: 56px;
    padding: 14px;
    background: rgba(0, 102, 255, 0.06);
    border: 1px solid var(--border);
    border-radius: 14px;
}
.info-text { display: flex; flex-direction: column; gap: 4px; }
.info-label {
    font-size: 12px;
    color: var(--text-mute);
    letter-spacing: 2px;
}
.info-value {
    font-size: 16px;
    color: var(--text);
    font-weight: 600;
}

.contact-form {
    padding: 48px;
    background: #FFFFFF;
    border: 1px solid var(--border);
    border-radius: 24px;
    box-shadow: var(--shadow-md);
}
.form-title {
    font-size: 24px;
    margin-bottom: 8px;
    color: var(--text);
    letter-spacing: 1px;
    font-weight: 700;
}
.form-desc {
    color: var(--text-dim);
    font-size: 13px;
    margin-bottom: 28px;
}
.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 18px;
}
.form-group { margin-bottom: 18px; }
.form-group label {
    display: block;
    font-size: 12px;
    color: var(--text-dim);
    margin-bottom: 8px;
    letter-spacing: 1px;
    font-weight: 500;
}
.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    background: #F5F8FC;
    border: 1px solid var(--border);
    border-radius: 10px;
    color: var(--text);
    font-size: 14px;
    transition: all 0.3s;
}
.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-mute);
}
.form-group select {
    appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12' fill='%230066FF'><path d='M6 8L2 4h8z'/></svg>");
    background-repeat: no-repeat;
    background-position: right 16px center;
    background-size: 12px;
    padding-right: 40px;
}
.form-group select option {
    background: #FFFFFF;
    color: var(--text);
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--primary);
    background: #FFFFFF;
    box-shadow: 0 0 0 3px rgba(0, 102, 255, 0.1);
}
.form-group textarea { resize: vertical; min-height: 100px; }

/* ========== Footer ========== */
.footer {
    background: linear-gradient(180deg, #F5F8FC 0%, #ECF2F9 100%);
    border-top: 1px solid var(--border);
    padding: 64px 0 24px;
    position: relative;
}
.footer::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 2px;
    background: var(--grad-primary);
}
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 60px;
    margin-bottom: 40px;
}
.footer-brand .logo { margin-bottom: 16px; }
.footer-slogan {
    font-size: 18px;
    color: var(--primary);
    margin-bottom: 12px;
    letter-spacing: 2px;
    font-weight: 700;
}
.footer-desc {
    font-size: 13px;
    color: var(--text-dim);
    line-height: 1.8;
    max-width: 380px;
}
.footer-col h5 {
    font-size: 14px;
    color: var(--text);
    margin-bottom: 20px;
    letter-spacing: 2px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border);
    font-weight: 700;
}
.footer-col ul li {
    padding: 8px 0;
}
.footer-col ul li a {
    font-size: 13px;
    color: var(--text-dim);
    transition: color 0.3s;
}
.footer-col ul li a:hover { color: var(--primary); }
.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 24px;
    border-top: 1px solid var(--border);
    font-size: 12px;
    color: var(--text-mute);
}
.footer-icp a {
    color: var(--text-mute);
    transition: color 0.3s;
}
.footer-icp a:hover {
    color: var(--primary);
}

/* ========== Back to Top ========== */
.back-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 48px;
    height: 48px;
    background: var(--grad-primary);
    color: #FFFFFF;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all 0.3s;
    box-shadow: 0 8px 24px rgba(0, 102, 255, 0.3);
    z-index: 99;
}
.back-top svg { width: 20px; height: 20px; }
.back-top.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}
.back-top:hover { transform: translateY(-4px); box-shadow: 0 12px 32px rgba(0, 102, 255, 0.5); }

/* ========== Responsive ========== */
@media (max-width: 1024px) {
    .hero-title { font-size: 56px; }
    .hero-container { grid-template-columns: 1fr; gap: 40px; }
    .hero-visual { height: 400px; }
    .energy-sphere { width: 320px; height: 320px; }
    .about-grid, .chairman-block, .contact-grid { grid-template-columns: 1fr; gap: 40px; }
    .business-grid { grid-template-columns: repeat(4, 1fr); gap: 16px; }
    .business-card { grid-column: span 2; }
    .business-card:nth-child(4) { grid-column: span 2; }
    .business-card:nth-child(5) { grid-column: 2 / span 2; }
    .capability-grid { grid-template-columns: repeat(2, 1fr); }
    .data-grid { grid-template-columns: repeat(2, 1fr); }
    .partners-wall { grid-template-columns: repeat(4, 1fr); }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
    .panel-grid { grid-template-columns: 1fr; padding: 32px; }
    .tab-nav { grid-template-columns: repeat(2, 1fr); }
    .chairman-avatar { display: flex; flex-direction: column; align-items: center; }
}
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0; right: 0;
        flex-direction: column;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(20px);
        padding: 20px;
        gap: 8px;
        transform: translateY(-150%);
        transition: transform 0.3s;
        border-bottom: 1px solid var(--border);
    }
    .nav-menu.open { transform: translateY(0); }
    .nav-link { display: block; padding: 12px 16px; }
    .nav-toggle { display: flex; }
    .section { padding: 80px 0; }
    .container { padding: 0 20px; }
    .hero-title { font-size: 42px; letter-spacing: 1px; }
    .title-divider { margin: 0 8px; }
    .section-title { font-size: 32px; }
    .section-header { margin-bottom: 50px; }
    .hero-actions { flex-direction: column; align-items: stretch; }
    .btn { justify-content: center; }
    .business-grid { grid-template-columns: 1fr; gap: 20px; }
    .business-card,
    .business-card:nth-child(4),
    .business-card:nth-child(5) { grid-column: 1 / -1; }
    .business-card { padding: 32px 24px; }
    .business-banner { flex-direction: column; gap: 16px; padding: 24px 16px; }
    .business-banner p { font-size: 14px; line-height: 1.6; }
    .banner-line { display: none; }
    .capability-grid { grid-template-columns: 1fr; }
    .about-quad { grid-template-columns: 1fr; }
    .about-quad .quad-item:nth-child(5) { grid-column: 1 / -1; justify-content: flex-start; }
    .data-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
    .data-card { padding: 32px 16px; }
    .data-number { font-size: 36px; }
    .data-unit { font-size: 16px; }
    .partners-wall { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1fr; }
    .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
    .chairman-block { padding: 32px 20px; }
    .chairman-words { padding-left: 0; }
    .quote-mark { position: static; display: block; margin-bottom: -20px; }
    .contact-form { padding: 28px; }
    .form-row { grid-template-columns: 1fr; }
    .tab-nav { grid-template-columns: 1fr; }
    .energy-sphere { width: 260px; height: 260px; }
    .hero-visual { height: 360px; }
    .float-node { padding: 10px 14px; font-size: 13px; gap: 6px; border-radius: 12px; }
    .float-node svg { width: 22px; height: 22px; }
    .node-1 { top: 8%; right: 2%; }
    .node-2 { top: 32%; left: -2%; }
    .node-3 { bottom: 22%; right: 0; }
    .node-4 { bottom: 6%; left: 8%; }
}