/* ============================================
   明巾科技 MAJOR — 深空蓝紫渐变科技风
   Deep Space Blue + Electric Blue-Purple Tech Theme
   ============================================ */

/* ===== CSS Variables ===== */
:root {
    --bg-deep: #060B18;
    --bg-dark: #0A1124;
    --bg-card: #0E1530;
    --bg-card-hover: #131C3D;
    --bg-glass: rgba(14, 21, 48, 0.6);

    --blue: #3D7FFF;
    --blue-light: #5B9FFF;
    --blue-bright: #4D8BFF;
    --purple: #8B5FFF;
    --purple-light: #A47FFF;
    --purple-dim: #6B3FDF;
    --grad-glow: rgba(61, 127, 255, 0.15);
    --grad-glow-strong: rgba(139, 95, 255, 0.25);

    --text-primary: #E8ECF5;
    --text-secondary: rgba(232, 236, 245, 0.6);
    --text-muted: rgba(232, 236, 245, 0.32);
    --text-heading: #F2F4FA;

    --border-subtle: rgba(61, 127, 255, 0.08);
    --border-default: rgba(61, 127, 255, 0.15);
    --border-strong: rgba(61, 127, 255, 0.28);

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;

    --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.3);
    --shadow-hover: 0 16px 48px rgba(0, 0, 0, 0.4), 0 0 0 1px var(--border-strong);
    --shadow-glow: 0 0 24px rgba(61, 127, 255, 0.08);

    --font-sans: 'Noto Sans SC', 'Inter', sans-serif;
    --font-en: 'Inter', sans-serif;

    --gradient: linear-gradient(135deg, #3D7FFF 0%, #8B5FFF 100%);
    --gradient-text: linear-gradient(135deg, #5B9FFF 0%, #3D7FFF 40%, #8B5FFF 100%);
    --gradient-dark: linear-gradient(180deg, #060B18 0%, #0A1124 50%, #060B18 100%);
    --gradient-card: linear-gradient(145deg, rgba(61, 127, 255, 0.04) 0%, rgba(14, 21, 48, 0.8) 50%, rgba(139, 95, 255, 0.03) 100%);
    --gradient-card-hover: linear-gradient(145deg, rgba(61, 127, 255, 0.07) 0%, rgba(14, 21, 48, 0.9) 50%, rgba(139, 95, 255, 0.06) 100%);
}

/* ===== Reset ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    background: var(--bg-deep);
    color: var(--text-primary);
    line-height: 1.7;
    font-size: 15px;
    overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

::selection {
    background: rgba(61, 127, 255, 0.3);
    color: #fff;
}

/* ===== Scrollbar ===== */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--bg-deep); }
::-webkit-scrollbar-thumb {
    background: rgba(61, 127, 255, 0.2);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover { background: rgba(61, 127, 255, 0.4); }

/* ===== Utility ===== */
.container { max-width: 1240px; margin: 0 auto; padding: 0 24px; }

.hide-mobile { display: inline; }

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

/* ===== Reveal Animation ===== */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1),
                transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}
.reveal.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* ============================================
   NAVBAR
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: 68px;
    transition: all 0.4s ease;
    background: transparent;
    border-bottom: 1px solid transparent;
}

.navbar.scrolled {
    background: rgba(6, 11, 24, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-subtle);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.nav-container {
    max-width: 1240px;
    margin: 0 auto;
    padding: 0 24px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* Logo */
.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}

.logo-mark {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    flex-shrink: 0;
    overflow: hidden;
    box-shadow: 0 4px 14px rgba(61, 127, 255, 0.35);
    transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.4s ease;
}

.nav-logo:hover .logo-mark {
    transform: rotate(-8deg) scale(1.08);
    box-shadow: 0 6px 20px rgba(139, 95, 255, 0.55);
}

.logo-mark svg { width: 100%; height: 100%; display: block; }
.logo-mark .logo-img { width: 100%; height: 100%; display: block; object-fit: contain; }

/* 页脚 logo 稍大 */
.footer-brand .logo-mark {
    width: 44px;
    height: 44px;
}
.footer-brand .logo-mark-lg {
    width: 48px;
    height: 48px;
}

.logo-text {
    font-family: var(--font-sans);
    font-size: 18px;
    font-weight: 700;
    color: var(--text-heading);
    letter-spacing: 1px;
    display: flex;
    align-items: baseline;
    gap: 8px;
}

.logo-en {
    font-family: var(--font-en);
    font-size: 14px;
    font-weight: 700;
    color: var(--blue-light);
    letter-spacing: 2px;
    -webkit-text-fill-color: var(--blue-light);
}

/* Nav Menu */
.nav-menu {
    display: flex;
    align-items: center;
    gap: 4px;
    margin-left: auto;
    margin-right: 24px;
}

.nav-link {
    position: relative;
    padding: 8px 14px;
    font-size: 14px;
    color: var(--text-secondary);
    transition: color 0.3s ease;
    font-weight: 400;
}

.nav-link:hover { color: var(--blue-light); }

.nav-link.active {
    color: var(--blue-light);
    font-weight: 500;
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 24px;
    height: 2px;
    background: var(--gradient);
    border-radius: 2px;
}

/* Nav CTA */
.nav-cta { flex-shrink: 0; }

.btn-nav-cta {
    display: inline-flex;
    align-items: center;
    padding: 9px 22px;
    font-size: 13px;
    font-weight: 600;
    color: #fff;
    background: var(--gradient);
    border-radius: var(--radius-sm);
    transition: all 0.3s ease;
    letter-spacing: 1px;
}

.btn-nav-cta:hover {
    transform: translateY(-1px);
    box-shadow: 0 8px 24px rgba(61, 127, 255, 0.3);
}

/* Mobile Toggle */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.nav-toggle span {
    width: 22px;
    height: 2px;
    background: var(--blue-light);
    border-radius: 2px;
    transition: all 0.3s ease;
}

.nav-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ============================================
   HERO
   ============================================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    overflow: hidden;
    background: var(--bg-deep);
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.hero-mesh {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at 30% 20%, rgba(61, 127, 255, 0.1) 0%, transparent 50%),
        radial-gradient(ellipse at 70% 80%, rgba(139, 95, 255, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 50%, rgba(61, 127, 255, 0.03) 0%, transparent 70%);
}

.hero-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(61, 127, 255, 0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(61, 127, 255, 0.04) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
}

.hero-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.45;
}

.orb-1 {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(61, 127, 255, 0.3) 0%, transparent 70%);
    top: -100px;
    right: -100px;
    animation: orbFloat1 12s ease-in-out infinite;
}

.orb-2 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(139, 95, 255, 0.25) 0%, transparent 70%);
    bottom: -50px;
    left: -50px;
    animation: orbFloat2 15s ease-in-out infinite;
}

@keyframes orbFloat1 {
    0%, 100% { transform: translate(0, 0); }
    50% { transform: translate(-30px, 40px); }
}

@keyframes orbFloat2 {
    0%, 100% { transform: translate(0, 0); }
    50% { transform: translate(40px, -30px); }
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 880px;
    padding: 120px 24px 80px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 18px;
    font-size: 13px;
    color: var(--blue-light);
    background: rgba(61, 127, 255, 0.08);
    border: 1px solid var(--border-default);
    border-radius: 100px;
    margin-bottom: 32px;
    backdrop-filter: blur(10px);
    letter-spacing: 0.5px;
}

.badge-dot {
    width: 6px;
    height: 6px;
    background: var(--blue);
    border-radius: 50%;
    box-shadow: 0 0 8px var(--blue);
    animation: dotPulse 2s ease-in-out infinite;
}

@keyframes dotPulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

.hero-title {
    font-size: clamp(2.2rem, 5vw, 3.8rem);
    font-weight: 800;
    line-height: 1.3;
    color: var(--text-heading);
    margin-bottom: 24px;
    letter-spacing: 1px;
}

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

.hero-desc {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 2;
    margin-bottom: 40px;
    max-width: 680px;
    margin-left: auto;
    margin-right: auto;
}

.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    margin-bottom: 60px;
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 36px;
    font-size: 15px;
    font-weight: 600;
    color: #fff;
    background: var(--gradient);
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.3s ease;
    letter-spacing: 1px;
    position: relative;
    overflow: hidden;
}

.btn-primary::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, transparent 30%, rgba(255,255,255,0.2) 50%, transparent 70%);
    transform: translateX(-100%);
    transition: transform 0.6s ease;
}

.btn-primary:hover::before { transform: translateX(100%); }

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 32px rgba(61, 127, 255, 0.35);
}

.btn-ghost {
    display: inline-flex;
    align-items: center;
    padding: 14px 28px;
    font-size: 15px;
    font-weight: 500;
    color: var(--blue-light);
    background: transparent;
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-sm);
    transition: all 0.3s ease;
}

.btn-ghost:hover {
    background: var(--grad-glow);
    border-color: var(--blue);
    color: var(--blue-light);
}

.btn-full { width: 100%; }

/* Hero Stats */
.hero-stats {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0;
    flex-wrap: wrap;
}

.stat-item {
    padding: 0 28px;
    text-align: center;
}

.stat-num {
    font-family: var(--font-en);
    font-size: clamp(1.8rem, 4vw, 2.8rem);
    font-weight: 800;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1.2;
    margin-bottom: 4px;
}

.stat-label {
    font-size: 13px;
    color: var(--text-muted);
    letter-spacing: 1px;
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: var(--border-default);
}

/* Scroll Hint */
.scroll-hint {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    z-index: 1;
}

.scroll-line {
    width: 1px;
    height: 30px;
    background: linear-gradient(to bottom, transparent, var(--blue));
    animation: scrollLine 2s ease-in-out infinite;
}

.scroll-text {
    font-size: 11px;
    color: var(--text-muted);
    letter-spacing: 2px;
}

@keyframes scrollLine {
    0% { transform: scaleY(0); transform-origin: top; }
    50% { transform: scaleY(1); transform-origin: top; }
    51% { transform-origin: bottom; }
    100% { transform: scaleY(0); transform-origin: bottom; }
}

/* ============================================
   SECTION COMMON
   ============================================ */
.section {
    padding: 100px 0;
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-tag {
    display: inline-block;
    font-family: var(--font-en);
    font-size: 12px;
    font-weight: 600;
    color: var(--blue-light);
    letter-spacing: 3px;
    text-transform: uppercase;
    margin-bottom: 16px;
    padding: 4px 16px;
    border: 1px solid var(--border-default);
    border-radius: 100px;
}

.section-title {
    font-size: clamp(1.8rem, 4vw, 2.6rem);
    font-weight: 800;
    color: var(--text-heading);
    margin-bottom: 12px;
    letter-spacing: 1px;
}

.section-subtitle {
    font-size: 15px;
    color: var(--text-secondary);
    letter-spacing: 1px;
}

/* ============================================
   ABOUT
   ============================================ */
.about {
    background: var(--bg-dark);
    border-top: 1px solid var(--border-subtle);
    border-bottom: 1px solid var(--border-subtle);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-heading {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--text-heading);
    margin-bottom: 20px;
    letter-spacing: 1px;
}

.about-paragraph {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 2;
    margin-bottom: 16px;
}

.about-highlights {
    margin-top: 32px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.highlight-item {
    display: flex;
    gap: 16px;
    align-items: flex-start;
}

.highlight-icon-wrap {
    width: 44px;
    height: 44px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--grad-glow);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-sm);
    color: var(--blue-light);
}

.highlight-icon-wrap svg { width: 22px; height: 22px; }

.highlight-text strong {
    display: block;
    font-size: 15px;
    font-weight: 600;
    color: var(--text-heading);
    margin-bottom: 4px;
}

.highlight-text span {
    font-size: 13px;
    color: var(--text-muted);
}

/* About Visual — Globe */
.about-visual {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 32px;
}

.about-globe {
    position: relative;
    width: 300px;
    height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.globe-ring {
    position: absolute;
    border-radius: 50%;
    border: 1px solid var(--border-default);
}

.ring-1 { width: 100%; height: 100%; animation: ringRotate 20s linear infinite; }
.ring-2 { width: 75%; height: 75%; animation: ringRotate 15s linear infinite reverse; border-color: var(--border-subtle); }
.ring-3 { width: 50%; height: 50%; animation: ringRotate 10s linear infinite; border-color: var(--border-default); }

@keyframes ringRotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.globe-core {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(61, 127, 255, 0.15) 0%, transparent 70%);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.globe-text {
    font-family: var(--font-en);
    font-size: 18px;
    font-weight: 800;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: 2px;
}

.globe-sub {
    font-size: 10px;
    color: var(--text-muted);
    letter-spacing: 1px;
    margin-top: 4px;
}

.globe-dot {
    position: absolute;
    width: 8px;
    height: 8px;
    background: var(--blue);
    border-radius: 50%;
    box-shadow: 0 0 12px var(--blue);
}

.dot-1 { top: 10%; left: 30%; animation: dotBlink 3s ease-in-out infinite; }
.dot-2 { top: 25%; right: 15%; animation: dotBlink 3s ease-in-out infinite 0.5s; background: var(--purple); box-shadow: 0 0 12px var(--purple); }
.dot-3 { bottom: 20%; left: 20%; animation: dotBlink 3s ease-in-out infinite 1s; }
.dot-4 { bottom: 15%; right: 25%; animation: dotBlink 3s ease-in-out infinite 1.5s; background: var(--purple); box-shadow: 0 0 12px var(--purple); }

@keyframes dotBlink {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.3; transform: scale(0.7); }
}

.about-regions {
    display: flex;
    flex-direction: column;
    gap: 10px;
    width: 100%;
    max-width: 280px;
}

.region {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 13px;
    color: var(--text-secondary);
    padding: 8px 14px;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
}

.region-dot {
    width: 6px;
    height: 6px;
    background: var(--blue);
    border-radius: 50%;
    flex-shrink: 0;
    box-shadow: 0 0 6px var(--blue);
}

/* ============================================
   PRODUCTS
   ============================================ */
.products {
    background: var(--bg-deep);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 60px;
}

.product-card {
    background: var(--gradient-card);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-lg);
    padding: 32px;
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(10px);
}

.product-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.5s ease;
}

.product-card:hover {
    border-color: var(--border-strong);
    box-shadow: var(--shadow-hover), var(--shadow-glow);
    transform: translateY(-4px);
}

.product-card:hover::before { transform: scaleX(1); }

.product-icon-wrap {
    width: 52px;
    height: 52px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--grad-glow);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-md);
    color: var(--blue-light);
    margin-bottom: 20px;
}

.product-icon-wrap svg { width: 28px; height: 28px; }

.product-tag {
    display: inline-block;
    font-family: var(--font-en);
    font-size: 11px;
    font-weight: 700;
    color: var(--blue-light);
    letter-spacing: 2px;
    margin-bottom: 8px;
    padding: 3px 10px;
    background: rgba(61, 127, 255, 0.08);
    border-radius: 100px;
}

.product-name {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-heading);
    margin-bottom: 12px;
}

.product-desc {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 16px;
}

.product-features {
    margin-bottom: 20px;
}

.product-features li {
    font-size: 13px;
    color: var(--text-muted);
    padding-left: 18px;
    position: relative;
    margin-bottom: 8px;
}

.product-features li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 8px;
    width: 6px;
    height: 6px;
    background: var(--purple-dim);
    border-radius: 50%;
}

.product-link {
    font-size: 13px;
    font-weight: 500;
    color: var(--blue);
    transition: gap 0.3s ease;
}

.product-link:hover { color: var(--blue-light); }

/* 五个在线 */
.online-section {
    background: var(--gradient-card);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-xl);
    padding: 48px;
    position: relative;
    overflow: hidden;
}

.online-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient);
}

.online-header {
    text-align: center;
    margin-bottom: 40px;
}

.online-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-heading);
    margin-bottom: 8px;
    letter-spacing: 1px;
}

.online-subtitle {
    font-size: 14px;
    color: var(--text-secondary);
}

.online-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 16px;
}

.online-grid-6 {
    grid-template-columns: repeat(3, 1fr);
}

.online-item {
    text-align: center;
    padding: 24px 16px;
    background: rgba(61, 127, 255, 0.04);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    transition: all 0.3s ease;
}

.online-item:hover {
    background: rgba(61, 127, 255, 0.08);
    border-color: var(--border-strong);
    transform: translateY(-4px);
}

.online-num {
    font-family: var(--font-en);
    font-size: 1.8rem;
    font-weight: 800;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 12px;
}

.online-body h4 {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-heading);
    margin-bottom: 8px;
}

.online-body p {
    font-size: 12px;
    color: var(--text-muted);
    line-height: 1.7;
}

/* ============================================
   AI SECTION
   ============================================ */
.ai-section {
    background: var(--bg-dark);
    border-top: 1px solid var(--border-subtle);
    border-bottom: 1px solid var(--border-subtle);
}

.ai-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.ai-card {
    background: var(--gradient-card);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all 0.4s ease;
    backdrop-filter: blur(10px);
}

.ai-card:hover {
    border-color: var(--border-strong);
    box-shadow: var(--shadow-hover);
    transform: translateY(-4px);
}

.ai-visual {
    padding: 40px 32px 24px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    position: relative;
    overflow: hidden;
}

.ai-visual::before {
    content: '';
    position: absolute;
    inset: 0;
    opacity: 0.6;
}

.ai-visual-1::before { background: radial-gradient(circle at 50% 50%, rgba(61, 127, 255, 0.12) 0%, transparent 70%); }
.ai-visual-2::before { background: radial-gradient(circle at 50% 50%, rgba(139, 95, 255, 0.12) 0%, transparent 70%); }
.ai-visual-3::before { background: radial-gradient(circle at 50% 50%, rgba(61, 127, 255, 0.12) 0%, transparent 70%); }
.ai-visual-4::before { background: radial-gradient(circle at 50% 50%, rgba(139, 95, 255, 0.12) 0%, transparent 70%); }

.ai-icon-big {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--blue-light);
    position: relative;
    z-index: 1;
}

.ai-icon-big svg { width: 100%; height: 100%; }

.ai-tag {
    font-family: var(--font-en);
    font-size: 11px;
    font-weight: 600;
    color: var(--blue-light);
    letter-spacing: 2px;
    padding: 4px 14px;
    background: rgba(61, 127, 255, 0.1);
    border: 1px solid var(--border-default);
    border-radius: 100px;
    position: relative;
    z-index: 1;
}

.ai-body {
    padding: 0 32px 32px;
}

.ai-name {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-heading);
    margin-bottom: 10px;
}

.ai-desc {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 20px;
}

.ai-metrics {
    display: flex;
    gap: 32px;
}

.ai-metric {
    display: flex;
    flex-direction: column;
}

.ai-metric-val {
    font-family: var(--font-en);
    font-size: 1.6rem;
    font-weight: 800;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1.2;
}

.ai-metric-label {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 4px;
}

/* ============================================
   INDUSTRIES
   ============================================ */
.industries {
    background: var(--bg-deep);
}

.industries-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.industry-card {
    background: var(--bg-card);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-lg);
    padding: 28px 24px;
    transition: all 0.4s ease;
}

.industry-card:hover {
    border-color: var(--border-strong);
    background: var(--bg-card-hover);
    transform: translateY(-4px);
    box-shadow: var(--shadow-card), var(--shadow-glow);
}

.industry-icon {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--grad-glow);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-sm);
    color: var(--blue-light);
    margin-bottom: 16px;
}

.industry-icon svg { width: 24px; height: 24px; }

.industry-name {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-heading);
    margin-bottom: 8px;
}

.industry-desc {
    font-size: 13px;
    color: var(--text-muted);
    line-height: 1.7;
    margin-bottom: 16px;
}

.industry-link {
    font-size: 12px;
    font-weight: 500;
    color: var(--purple-dim);
    transition: color 0.3s ease;
}

.industry-link:hover { color: var(--purple-light); }

/* ============================================
   CASES
   ============================================ */
.cases {
    background: var(--bg-dark);
    border-top: 1px solid var(--border-subtle);
    border-bottom: 1px solid var(--border-subtle);
}

.client-wall {
    margin-bottom: 48px;
}

.client-logos {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 1px;
    background: var(--border-subtle);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.client-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px 12px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    background: var(--bg-card);
    transition: all 0.3s ease;
    text-align: center;
}

.client-logo:hover {
    background: var(--bg-card-hover);
    color: var(--blue-light);
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.case-card {
    background: var(--gradient-card);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all 0.4s ease;
    backdrop-filter: blur(10px);
}

.case-card:hover {
    border-color: var(--border-strong);
    box-shadow: var(--shadow-hover);
    transform: translateY(-4px);
}

.case-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 28px;
    border-bottom: 1px solid var(--border-subtle);
    background: rgba(61, 127, 255, 0.03);
}

.case-industry {
    font-size: 12px;
    font-weight: 600;
    color: var(--blue-light);
    padding: 4px 12px;
    background: rgba(61, 127, 255, 0.08);
    border-radius: 100px;
    letter-spacing: 1px;
}

.case-no {
    font-family: var(--font-en);
    font-size: 1.8rem;
    font-weight: 800;
    color: rgba(61, 127, 255, 0.2);
}

.case-body {
    padding: 28px;
}

.case-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-heading);
    margin-bottom: 12px;
    line-height: 1.5;
}

.case-desc {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 24px;
}

.case-metrics {
    display: flex;
    gap: 20px;
}

.case-metric {
    flex: 1;
    text-align: center;
    padding: 16px 8px;
    background: rgba(61, 127, 255, 0.04);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
}

.case-metric-val {
    font-family: var(--font-en);
    font-size: 1.4rem;
    font-weight: 800;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 4px;
}

.case-metric-label {
    font-size: 11px;
    color: var(--text-muted);
}

/* Case CTA Card */
.case-cta-card {
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(61, 127, 255, 0.08) 0%, rgba(139, 95, 255, 0.05) 100%);
    border: 1px dashed var(--border-strong);
}

.case-cta-content {
    text-align: center;
    padding: 28px;
}

.case-cta-content h3 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-heading);
    margin-bottom: 12px;
}

.case-cta-content p {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 20px;
}

/* ============================================
   PROCESS
   ============================================ */
.process {
    background: var(--bg-deep);
}

.process-timeline {
    position: relative;
    padding: 20px 0;
}

.process-line {
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 1px;
    background: linear-gradient(to bottom,
        transparent 0%,
        var(--border-default) 10%,
        var(--border-default) 90%,
        transparent 100%);
    transform: translateX(-50%);
}

.process-steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px 20px;
    position: relative;
}

.process-step {
    text-align: center;
    padding: 24px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-lg);
    transition: all 0.3s ease;
    position: relative;
}

.process-step:hover {
    border-color: var(--border-strong);
    box-shadow: var(--shadow-glow);
}

.step-num {
    font-family: var(--font-en);
    font-size: 1.4rem;
    font-weight: 800;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 12px;
}

.step-body h4 {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-heading);
    margin-bottom: 6px;
}

.step-body p {
    font-size: 12px;
    color: var(--text-muted);
    line-height: 1.6;
}

/* ============================================
   ADVANTAGES
   ============================================ */
.advantages {
    background: var(--bg-dark);
    border-top: 1px solid var(--border-subtle);
    border-bottom: 1px solid var(--border-subtle);
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.advantage-card {
    background: var(--bg-card);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-lg);
    padding: 32px 28px;
    transition: all 0.4s ease;
}

.advantage-card:hover {
    border-color: var(--border-strong);
    box-shadow: var(--shadow-hover);
    transform: translateY(-4px);
}

.adv-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--grad-glow);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-md);
    color: var(--blue-light);
    margin-bottom: 20px;
}

.adv-icon svg { width: 26px; height: 26px; }

.advantage-card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-heading);
    margin-bottom: 10px;
}

.advantage-card p {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.8;
}

/* ============================================
   CONTACT
   ============================================ */
.contact {
    background: var(--bg-deep);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 48px;
}

.contact-cta-box {
    padding: 36px 32px;
    background: var(--gradient-card);
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-lg);
    margin-bottom: 32px;
    position: relative;
    overflow: hidden;
}

.contact-cta-box::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient);
}

.contact-cta-box h3 {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-heading);
    margin-bottom: 10px;
}

.contact-cta-box p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.8;
}

.contact-items {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-bottom: 32px;
}

.contact-item {
    display: flex;
    gap: 16px;
    align-items: flex-start;
}

.contact-icon {
    width: 44px;
    height: 44px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--grad-glow);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-sm);
    color: var(--blue-light);
}

.contact-icon svg { width: 22px; height: 22px; }

.contact-label {
    display: block;
    font-size: 12px;
    color: var(--text-muted);
    margin-bottom: 4px;
    letter-spacing: 1px;
}

.contact-detail p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
}

.contact-social {
    padding-top: 24px;
    border-top: 1px solid var(--border-subtle);
}

.social-label {
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 12px;
    display: block;
}

.social-links {
    display: flex;
    gap: 12px;
}

.social-link {
    font-size: 13px;
    color: var(--text-secondary);
    padding: 8px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-sm);
    transition: all 0.3s ease;
}

.social-link:hover {
    color: var(--blue-light);
    border-color: var(--border-strong);
    background: var(--grad-glow);
}

/* QR Code */
.qrcode-wrap {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
}

.qrcode-placeholder {
    width: 120px;
    height: 120px;
    background: #fff;
    border-radius: var(--radius-sm);
    padding: 6px;
    border: 1px solid var(--border-default);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
}

.qrcode-placeholder.qrcode-real {
    position: relative;
    padding: 4px;
    border: 1px solid rgba(139, 92, 246, 0.35);
    box-shadow:
        0 0 0 1px rgba(139, 92, 246, 0.15),
        0 4px 18px rgba(99, 102, 241, 0.35),
        0 0 24px rgba(56, 189, 248, 0.25);
    overflow: hidden;
}

.qrcode-real .qrcode-img {
    width: 100%;
    height: 100%;
    display: block;
    border-radius: 2px;
    position: relative;
    z-index: 2;
    /* 让黑白二维码融入深空蓝紫主题：微调对比/加主题色淡彩 */
    filter: contrast(1.05) brightness(1.02);
    transition: transform 0.4s ease, filter 0.4s ease;
}

.qrcode-real:hover .qrcode-img {
    transform: scale(1.04);
    filter: contrast(1.1) brightness(1.05);
}

.qrcode-real .qrcode-glow {
    position: absolute;
    inset: -2px;
    border-radius: var(--radius-sm);
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.25), rgba(56, 189, 248, 0.18), rgba(139, 92, 246, 0.22));
    z-index: 1;
    opacity: 0.55;
    pointer-events: none;
    animation: qrPulse 4s ease-in-out infinite;
}

@keyframes qrPulse {
    0%, 100% { opacity: 0.45; }
    50% { opacity: 0.7; }
}

.qrcode-placeholder svg {
    width: 100%;
    height: 100%;
    display: block;
}

.qrcode-text {
    font-size: 12px;
    color: var(--text-muted);
    line-height: 1.6;
}

/* Contact Form */
.contact-form-wrap {
    background: var(--gradient-card);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-lg);
    padding: 36px;
    backdrop-filter: blur(10px);
}

.form-title {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-heading);
    margin-bottom: 6px;
}

.form-subtitle {
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 28px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 20px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 8px;
    font-weight: 500;
}

.required { color: var(--blue); }

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    font-size: 14px;
    font-family: var(--font-sans);
    color: var(--text-primary);
    background: var(--bg-deep);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-sm);
    transition: all 0.3s ease;
    outline: none;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-muted);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--blue);
    box-shadow: 0 0 0 3px rgba(61, 127, 255, 0.1);
}

.form-group select {
    cursor: pointer;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='none' stroke='%233D7FFF' stroke-width='2'%3E%3Cpath d='M2 4l4 4 4-4'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
    padding-right: 40px;
}

.form-group select option {
    background: var(--bg-dark);
    color: var(--text-primary);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.form-note {
    font-size: 12px;
    color: var(--text-muted);
    text-align: center;
    margin-top: 16px;
}

.form-note a { color: var(--purple-dim); }
.form-note a:hover { color: var(--purple-light); }

/* ============================================
   FOOTER
   ============================================ */
.footer {
    background: #040711;
    border-top: 1px solid var(--border-subtle);
    padding: 60px 0 0;
}

.footer-top {
    display: grid;
    grid-template-columns: 1.2fr 2fr;
    gap: 60px;
    padding-bottom: 48px;
    border-bottom: 1px solid var(--border-subtle);
}

.footer-brand {
    max-width: 360px;
}

.footer-desc {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin: 20px 0 16px;
}

.footer-contact {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.footer-contact span {
    font-size: 14px;
    color: var(--blue-light);
    font-weight: 500;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
}

.footer-col h4 {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-heading);
    margin-bottom: 16px;
    letter-spacing: 1px;
}

.footer-col a {
    display: block;
    font-size: 13px;
    color: var(--text-muted);
    padding: 5px 0;
    transition: color 0.3s ease;
}

.footer-col a:hover { color: var(--blue-light); }

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px 0;
}

.footer-bottom p {
    font-size: 12px;
    color: var(--text-muted);
}

.footer-legal {
    display: flex;
    gap: 20px;
}

.footer-legal a {
    font-size: 12px;
    color: var(--text-muted);
    transition: color 0.3s ease;
}

.footer-legal a:hover { color: var(--blue-light); }

.footer-legal a.police-record {
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.footer-legal a.police-record svg {
    flex-shrink: 0;
}

/* ============================================
   BACK TO TOP
   ============================================ */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-card);
    border: 1px solid var(--border-strong);
    border-radius: 50%;
    color: var(--blue-light);
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all 0.4s ease;
    z-index: 900;
    backdrop-filter: blur(10px);
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: var(--grad-glow);
    border-color: var(--blue);
    box-shadow: 0 8px 24px rgba(61, 127, 255, 0.2);
}

.back-to-top svg { width: 22px; height: 22px; }

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 1024px) {
    .products-grid { grid-template-columns: repeat(2, 1fr); }
    .industries-grid { grid-template-columns: repeat(2, 1fr); }
    .cases-grid { grid-template-columns: 1fr; }
    .online-grid { grid-template-columns: repeat(3, 1fr); }
    .online-grid-6 { grid-template-columns: repeat(2, 1fr); }
    .process-steps { grid-template-columns: repeat(2, 1fr); }
    .process-line { display: none; }
    .advantages-grid { grid-template-columns: repeat(2, 1fr); }
    .client-logos { grid-template-columns: repeat(4, 1fr); }
    .footer-top { grid-template-columns: 1fr; }
    .footer-links { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .hide-mobile { display: none; }

    .nav-menu {
        position: fixed;
        top: 68px;
        left: 0;
        right: 0;
        flex-direction: column;
        background: rgba(6, 11, 24, 0.98);
        backdrop-filter: blur(20px);
        padding: 24px;
        gap: 8px;
        border-bottom: 1px solid var(--border-subtle);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all 0.4s ease;
    }

    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav-link {
        display: block;
        padding: 12px 16px;
        font-size: 15px;
    }

    .nav-link.active::after { display: none; }

    .nav-cta { display: none; }
    .nav-toggle { display: flex; }

    .hero-content { padding: 100px 20px 60px; }
    .hero-actions { flex-direction: column; align-items: center; }

    .stat-item { padding: 0 16px; }
    .stat-divider { display: none; }

    .section { padding: 60px 0; }

    .about-grid { grid-template-columns: 1fr; gap: 40px; }
    .about-globe { width: 220px; height: 220px; }

    .products-grid { grid-template-columns: 1fr; }
    .online-grid { grid-template-columns: repeat(2, 1fr); }
    .online-section { padding: 32px 20px; }

    .ai-grid { grid-template-columns: 1fr; }
    .ai-metrics { gap: 20px; }

    .industries-grid { grid-template-columns: 1fr; }
    .client-logos { grid-template-columns: repeat(3, 1fr); }

    .cases-grid { grid-template-columns: 1fr; }
    .case-metrics { flex-direction: column; gap: 10px; }

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

    .advantages-grid { grid-template-columns: 1fr; }

    .contact-grid { grid-template-columns: 1fr; }
    .form-row { grid-template-columns: 1fr; }

    .footer-links { grid-template-columns: 1fr; gap: 24px; }
    .footer-bottom { flex-direction: column; gap: 12px; text-align: center; }

    .back-to-top { bottom: 20px; right: 20px; }
}