/* ============================================================
   GKVAP-WEB  ·  智能视频分析系统  ·  官方网站样式
   Tech / Cyber  ·  Dark + Neon
   ============================================================ */

/* ---------- 1. Reset & Base ---------- */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --bg-base: #05070d;
    --bg-deep: #0a1428;
    --bg-card: #0e1a2e;
    --bg-card-2: #0b1424;
    --bg-glass: rgba(14, 26, 46, 0.55);

    --c-primary: #00e5ff;
    --c-primary-soft: rgba(0, 229, 255, 0.18);
    --c-secondary: #7c4dff;
    --c-secondary-soft: rgba(124, 77, 255, 0.18);
    --c-accent: #00ffa3;
    --c-warn: #ff6b35;
    --c-danger: #ff3366;
    --c-yellow: #ffd166;

    --c-text: #e8f4ff;
    --c-text-sub: #7a8ba8;
    --c-text-dim: #4a5772;
    --c-border: rgba(0, 229, 255, 0.18);
    --c-border-soft: rgba(120, 160, 200, 0.12);

    --shadow-glow: 0 0 24px rgba(0, 229, 255, 0.32);
    --shadow-glow-purple: 0 0 24px rgba(124, 77, 255, 0.32);
    --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.45);

    --radius: 12px;
    --radius-lg: 18px;
    --radius-sm: 8px;

    --font-display: 'Orbitron', 'Noto Sans SC', sans-serif;
    --font-body: 'Inter', 'Noto Sans SC', sans-serif;
    --font-mono: 'JetBrains Mono', 'Courier New', monospace;

    --container: 1280px;
    --pad: 24px;
    --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
    background: var(--bg-base);
}

body {
    font-family: var(--font-body);
    color: var(--c-text);
    background: var(--bg-base);
    line-height: 1.65;
    font-size: 15px;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

::selection {
    background: var(--c-primary);
    color: var(--bg-base);
}

a {
    color: inherit;
    text-decoration: none;
    transition: color 0.25s var(--ease);
}

button {
    background: none;
    border: none;
    color: inherit;
    font: inherit;
    cursor: pointer;
}

ul {
    list-style: none;
}

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

/* ---------- 2. 背景层 ---------- */
.bg-layer {
    position: fixed;
    inset: 0;
    z-index: -1;
    pointer-events: none;
    overflow: hidden;
    background:
        radial-gradient(ellipse at 20% 0%, rgba(0, 229, 255, 0.10) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 100%, rgba(124, 77, 255, 0.10) 0%, transparent 50%),
        linear-gradient(180deg, #05070d 0%, #060a16 50%, #05070d 100%);
}

.bg-grid {
    position: absolute;
    inset: -2px;
    background-image:
        linear-gradient(rgba(0, 229, 255, 0.045) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 229, 255, 0.045) 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%);
    animation: gridShift 40s linear infinite;
}

@keyframes gridShift {
    0% { background-position: 0 0, 0 0; }
    100% { background-position: 60px 60px, 60px 60px; }
}

.bg-glow {
    position: absolute;
    border-radius: 50%;
    filter: blur(120px);
    opacity: 0.5;
    will-change: transform;
}
.bg-glow-1 {
    width: 600px; height: 600px;
    background: radial-gradient(circle, rgba(0, 229, 255, 0.45), transparent 70%);
    top: -200px; left: -200px;
    animation: float1 18s ease-in-out infinite;
}
.bg-glow-2 {
    width: 500px; height: 500px;
    background: radial-gradient(circle, rgba(124, 77, 255, 0.4), transparent 70%);
    bottom: -150px; right: -150px;
    animation: float2 22s ease-in-out infinite;
}
.bg-glow-3 {
    width: 400px; height: 400px;
    background: radial-gradient(circle, rgba(0, 255, 163, 0.22), transparent 70%);
    top: 40%; left: 50%;
    animation: float3 26s ease-in-out infinite;
}

@keyframes float1 {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(80px, 60px) scale(1.1); }
}
@keyframes float2 {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(-80px, -40px) scale(1.15); }
}
@keyframes float3 {
    0%, 100% { transform: translate(-50%, -50%) scale(1); }
    50% { transform: translate(-30%, -60%) scale(1.2); }
}

.bg-scanline {
    position: absolute;
    inset: 0;
    background: repeating-linear-gradient(
        180deg,
        transparent 0,
        transparent 2px,
        rgba(0, 229, 255, 0.012) 2px,
        rgba(0, 229, 255, 0.012) 3px
    );
    pointer-events: none;
}

.bg-noise {
    position: absolute;
    inset: 0;
    background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='200' height='200'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3'/><feColorMatrix values='0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.05 0'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
    opacity: 0.5;
    mix-blend-mode: overlay;
}

/* ---------- 3. 容器 ---------- */
.container {
    width: 100%;
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 var(--pad);
}

/* ---------- 4. 导航栏 ---------- */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: 14px 0;
    background: rgba(5, 7, 13, 0.55);
    backdrop-filter: blur(18px) saturate(180%);
    -webkit-backdrop-filter: blur(18px) saturate(180%);
    border-bottom: 1px solid transparent;
    transition: all 0.4s var(--ease);
}
.nav.scrolled {
    background: rgba(5, 7, 13, 0.85);
    border-bottom-color: var(--c-border);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.35);
}

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

.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--c-text);
}
.logo-mark {
    width: 36px;
    height: 36px;
    display: grid;
    place-items: center;
    color: var(--c-primary);
    background: linear-gradient(135deg, rgba(0, 229, 255, 0.12), rgba(124, 77, 255, 0.08));
    border: 1px solid var(--c-border);
    border-radius: 8px;
    box-shadow: 0 0 16px rgba(0, 229, 255, 0.18);
}
.logo-mark svg {
    width: 22px;
    height: 22px;
}
.logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.1;
}
.logo-name {
    font-family: var(--font-display);
    font-weight: 800;
    font-size: 17px;
    letter-spacing: 1.5px;
    background: linear-gradient(90deg, #00e5ff 0%, #7c4dff 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}
.logo-sub {
    font-size: 11px;
    color: var(--c-text-sub);
    margin-top: 2px;
    letter-spacing: 0.5px;
}

.nav-menu {
    display: flex;
    gap: 4px;
    align-items: center;
}
.nav-menu a {
    position: relative;
    padding: 8px 14px;
    font-size: 14px;
    color: var(--c-text-sub);
    border-radius: 6px;
    transition: all 0.25s var(--ease);
}
.nav-menu a::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 1px;
    background: var(--c-primary);
    box-shadow: 0 0 8px var(--c-primary);
    transition: width 0.3s var(--ease);
}
.nav-menu a:hover {
    color: var(--c-text);
}
.nav-menu a:hover::before {
    width: 60%;
}
.nav-menu a.active {
    color: var(--c-primary);
}
.nav-menu a.active::before {
    width: 60%;
}

.nav-cta {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 9px 18px;
    font-size: 13px;
    font-weight: 600;
    color: var(--bg-base);
    background: linear-gradient(135deg, #00e5ff 0%, #7c4dff 100%);
    border-radius: 100px;
    box-shadow: 0 4px 16px rgba(0, 229, 255, 0.3);
    transition: all 0.3s var(--ease);
    letter-spacing: 0.5px;
}
.nav-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 229, 255, 0.45);
}
.nav-cta svg {
    width: 14px;
    height: 14px;
}

.nav-toggle {
    display: none;
    width: 32px;
    height: 32px;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
}
.nav-toggle span {
    height: 2px;
    background: var(--c-text);
    border-radius: 2px;
    transition: all 0.3s var(--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); }

/* ---------- 5. 通用 Section ---------- */
.section {
    position: relative;
    padding: 120px 0;
}
.section-head {
    text-align: center;
    max-width: 760px;
    margin: 0 auto 80px;
}
.section-tag {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--c-primary);
    letter-spacing: 2px;
    margin-bottom: 20px;
    padding: 4px 12px;
    background: var(--c-primary-soft);
    border: 1px solid var(--c-border);
    border-radius: 4px;
}
.section-title {
    font-family: var(--font-display);
    font-size: clamp(28px, 4vw, 44px);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: 0.5px;
    margin-bottom: 24px;
    color: var(--c-text);
}
.text-accent {
    background: linear-gradient(90deg, #00e5ff 0%, #7c4dff 50%, #00ffa3 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}
.section-desc {
    color: var(--c-text-sub);
    font-size: 15px;
    line-height: 1.8;
}
.sub-title {
    font-family: var(--font-display);
    font-size: 18px;
    font-weight: 600;
    color: var(--c-text);
    margin-bottom: 24px;
    padding-left: 12px;
    border-left: 3px solid var(--c-primary);
    letter-spacing: 1px;
}

/* ---------- 6. Hero ---------- */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 120px 24px 80px;
    overflow: hidden;
}
.hero-particles {
    position: absolute;
    inset: 0;
    z-index: 0;
    pointer-events: none;
}
.hero-particles i {
    position: absolute;
    width: 2px;
    height: 2px;
    background: var(--c-primary);
    border-radius: 50%;
    box-shadow: 0 0 8px var(--c-primary);
    opacity: 0.5;
    animation: floatUp linear infinite;
}
@keyframes floatUp {
    0% { transform: translateY(0) translateX(0); opacity: 0; }
    10% { opacity: 0.7; }
    90% { opacity: 0.5; }
    100% { transform: translateY(-100vh) translateX(40px); opacity: 0; }
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 980px;
    margin: 0 auto;
}
.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--c-primary);
    background: var(--c-primary-soft);
    border: 1px solid var(--c-border);
    border-radius: 100px;
    margin-bottom: 32px;
    letter-spacing: 0.5px;
}
.hero-badge-dot {
    width: 6px;
    height: 6px;
    background: var(--c-primary);
    border-radius: 50%;
    box-shadow: 0 0 8px var(--c-primary);
    animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.4; transform: scale(1.4); }
}

.hero-title {
    font-family: var(--font-display);
    font-weight: 800;
    font-size: clamp(40px, 7vw, 84px);
    line-height: 1.1;
    margin-bottom: 32px;
    letter-spacing: 1px;
}
.hero-line {
    display: block;
    overflow: hidden;
}
.glitch {
    position: relative;
    display: inline-block;
    color: var(--c-text);
    animation: glitchIn 1s var(--ease) backwards;
}
.hero-line:nth-child(1) .glitch { animation-delay: 0.1s; }
.hero-line:nth-child(2) .glitch { animation-delay: 0.3s; }
.hero-line:nth-child(3) .glitch { animation-delay: 0.5s; }
@keyframes glitchIn {
    0% { opacity: 0; transform: translateY(100%); }
    100% { opacity: 1; transform: translateY(0); }
}
.glitch::before,
.glitch::after {
    content: attr(data-text);
    position: absolute;
    inset: 0;
    pointer-events: none;
    opacity: 0.7;
}
.glitch::before {
    color: var(--c-primary);
    transform: translate(-2px, 0);
    mix-blend-mode: screen;
    animation: glitchA 4s infinite;
}
.glitch::after {
    color: var(--c-secondary);
    transform: translate(2px, 0);
    mix-blend-mode: screen;
    animation: glitchB 4s infinite;
}
@keyframes glitchA {
    0%, 90%, 100% { transform: translate(0, 0); opacity: 0; }
    92% { transform: translate(-3px, 1px); opacity: 0.7; }
    94% { transform: translate(2px, -1px); opacity: 0.6; }
    96% { transform: translate(-1px, 0); opacity: 0.5; }
}
@keyframes glitchB {
    0%, 88%, 100% { transform: translate(0, 0); opacity: 0; }
    90% { transform: translate(3px, -1px); opacity: 0.6; }
    93% { transform: translate(-2px, 1px); opacity: 0.5; }
    95% { transform: translate(1px, 0); opacity: 0.4; }
}

.hero-accent {
    background: linear-gradient(90deg, #00e5ff 0%, #7c4dff 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    filter: drop-shadow(0 0 24px rgba(0, 229, 255, 0.4));
}

.hero-sub {
    font-size: 17px;
    color: var(--c-text-sub);
    line-height: 1.9;
    margin-bottom: 48px;
    max-width: 720px;
    margin-left: auto;
    margin-right: auto;
}

.hero-cta {
    display: flex;
    gap: 16px;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    margin-bottom: 40px;
}
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    font-size: 14px;
    font-weight: 600;
    border-radius: 100px;
    letter-spacing: 1px;
    transition: all 0.3s var(--ease);
    position: relative;
    overflow: hidden;
}
.btn svg {
    width: 14px;
    height: 14px;
}
.btn-primary {
    color: var(--bg-base);
    background: linear-gradient(135deg, #00e5ff 0%, #7c4dff 100%);
    box-shadow: 0 8px 24px rgba(0, 229, 255, 0.35);
}
.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 32px rgba(0, 229, 255, 0.55);
}
.btn-primary::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    transform: translateX(-100%);
    transition: transform 0.6s var(--ease);
}
.btn-primary:hover::after {
    transform: translateX(100%);
}
.btn-ghost {
    color: var(--c-text);
    background: rgba(0, 229, 255, 0.05);
    border: 1px solid var(--c-border);
}
.btn-ghost:hover {
    background: var(--c-primary-soft);
    border-color: var(--c-primary);
    transform: translateY(-3px);
    box-shadow: var(--shadow-glow);
}

.hero-tags {
    display: flex;
    gap: 24px;
    justify-content: center;
    flex-wrap: wrap;
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--c-text-sub);
    letter-spacing: 1px;
}
.hero-tags span {
    position: relative;
    padding-left: 16px;
}
.hero-tags span::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 6px;
    height: 6px;
    background: var(--c-primary);
    border-radius: 50%;
    box-shadow: 0 0 6px var(--c-primary);
}

.hero-scroll {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    z-index: 2;
    color: var(--c-text-sub);
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 3px;
}
.hero-scroll-line {
    width: 1px;
    height: 40px;
    background: linear-gradient(180deg, var(--c-primary), transparent);
    animation: scrollLine 2s ease-in-out infinite;
}
@keyframes scrollLine {
    0% { transform: scaleY(0); transform-origin: top; }
    50% { transform: scaleY(1); transform-origin: top; }
    51% { transform: scaleY(1); transform-origin: bottom; }
    100% { transform: scaleY(0); transform-origin: bottom; }
}

/* ---------- 7. 数据看板 ---------- */
.metrics {
    position: relative;
    padding: 60px 0 100px;
}
.metric-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.metric-card {
    position: relative;
    padding: 32px 24px;
    background: var(--bg-card);
    border: 1px solid var(--c-border-soft);
    border-radius: var(--radius);
    text-align: center;
    overflow: hidden;
    transition: all 0.4s var(--ease);
}
.metric-card::before {
    content: '';
    position: absolute;
    inset: -1px;
    background: linear-gradient(135deg, var(--c-primary), transparent 40%, var(--c-secondary) 100%);
    border-radius: var(--radius);
    z-index: -1;
    opacity: 0;
    transition: opacity 0.4s var(--ease);
}
.metric-card::after {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--c-primary), transparent);
    opacity: 0;
    transition: opacity 0.4s var(--ease);
}
.metric-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-glow);
    border-color: var(--c-primary);
}
.metric-card:hover::before { opacity: 0.15; }
.metric-card:hover::after { opacity: 1; }
.metric-num {
    font-family: var(--font-display);
    font-size: 48px;
    font-weight: 700;
    line-height: 1;
    background: linear-gradient(135deg, #00e5ff 0%, #7c4dff 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    margin-bottom: 8px;
}
.metric-num sup {
    font-size: 20px;
    color: var(--c-primary);
    -webkit-text-fill-color: var(--c-primary);
}
.metric-label {
    font-size: 13px;
    color: var(--c-text-sub);
    letter-spacing: 1px;
    margin-bottom: 16px;
}
.metric-bar {
    height: 2px;
    background: rgba(0, 229, 255, 0.1);
    border-radius: 2px;
    overflow: hidden;
}
.metric-bar i {
    display: block;
    height: 100%;
    width: 0;
    background: linear-gradient(90deg, var(--c-primary), var(--c-secondary));
    box-shadow: 0 0 8px var(--c-primary);
    animation: barFill 1.8s var(--ease) forwards;
}
@keyframes barFill {
    to { width: 80%; }
}

/* ---------- 8. 产品概述 ---------- */
.overview-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.overview-card {
    position: relative;
    padding: 36px 28px;
    background: linear-gradient(180deg, var(--bg-card) 0%, var(--bg-card-2) 100%);
    border: 1px solid var(--c-border-soft);
    border-radius: var(--radius);
    transition: all 0.4s var(--ease);
    overflow: hidden;
}
.overview-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--c-primary), transparent);
    transform: translateX(-100%);
    transition: transform 0.6s var(--ease);
}
.overview-card:hover {
    transform: translateY(-6px);
    border-color: var(--c-border);
    box-shadow: var(--shadow-glow);
}
.overview-card:hover::before { transform: translateX(0); }
.overview-icon {
    font-size: 32px;
    color: var(--c-primary);
    margin-bottom: 20px;
    text-shadow: 0 0 16px rgba(0, 229, 255, 0.5);
}
.overview-card h3 {
    font-family: var(--font-display);
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--c-text);
    letter-spacing: 0.5px;
}
.overview-card p {
    font-size: 13px;
    color: var(--c-text-sub);
    line-height: 1.7;
}

/* ---------- 9. 核心特性 ---------- */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.feature-card {
    position: relative;
    padding: 36px 32px;
    background: var(--bg-card);
    border: 1px solid var(--c-border-soft);
    border-radius: var(--radius);
    transition: all 0.4s var(--ease);
    overflow: hidden;
}
.feature-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 100% 0%, rgba(0, 229, 255, 0.12), transparent 50%);
    opacity: 0;
    transition: opacity 0.4s var(--ease);
}
.feature-card:hover {
    transform: translateY(-6px);
    border-color: var(--c-primary);
    box-shadow: var(--shadow-glow);
}
.feature-card:hover::before { opacity: 1; }
.feature-num {
    position: absolute;
    top: 16px;
    right: 24px;
    font-family: var(--font-display);
    font-size: 56px;
    font-weight: 800;
    color: rgba(0, 229, 255, 0.08);
    line-height: 1;
    letter-spacing: -1px;
    transition: color 0.4s var(--ease);
}
.feature-card:hover .feature-num {
    color: rgba(0, 229, 255, 0.15);
}
.feature-icon {
    width: 56px;
    height: 56px;
    display: grid;
    place-items: center;
    color: var(--c-primary);
    background: var(--c-primary-soft);
    border: 1px solid var(--c-border);
    border-radius: 12px;
    margin-bottom: 20px;
    position: relative;
    z-index: 1;
}
.feature-icon svg {
    width: 28px;
    height: 28px;
}
.feature-card h3 {
    position: relative;
    z-index: 1;
    font-family: var(--font-display);
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--c-text);
}
.feature-card p {
    position: relative;
    z-index: 1;
    font-size: 14px;
    color: var(--c-text-sub);
    line-height: 1.7;
}

/* ---------- 10. 系统架构 ---------- */
.arch-canvas {
    position: relative;
    max-width: 1100px;
    margin: 0 auto;
    padding: 40px 32px;
    background:
        linear-gradient(180deg, rgba(14, 26, 46, 0.6) 0%, rgba(11, 20, 36, 0.6) 100%);
    border: 1px solid var(--c-border-soft);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(12px);
}
.arch-layer {
    position: relative;
    display: flex;
    align-items: center;
    gap: 24px;
    padding: 18px 0;
}
.arch-side-tag {
    flex-shrink: 0;
    width: 36px;
    height: 36px;
    display: grid;
    place-items: center;
    font-family: var(--font-display);
    font-size: 11px;
    font-weight: 700;
    color: var(--c-primary);
    background: var(--c-primary-soft);
    border: 1px solid var(--c-border);
    border-radius: 6px;
    box-shadow: 0 0 12px rgba(0, 229, 255, 0.18);
}
.arch-title {
    flex-shrink: 0;
    width: 140px;
    font-family: var(--font-display);
    font-size: 14px;
    font-weight: 600;
    color: var(--c-text);
    letter-spacing: 1px;
}
.arch-items {
    flex: 1;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}
.arch-item {
    padding: 8px 16px;
    font-size: 13px;
    color: var(--c-text-sub);
    background: rgba(0, 229, 255, 0.05);
    border: 1px solid var(--c-border-soft);
    border-radius: 6px;
    transition: all 0.25s var(--ease);
    position: relative;
}
.arch-item:hover {
    color: var(--c-text);
    border-color: var(--c-primary);
    background: var(--c-primary-soft);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 229, 255, 0.2);
}
.arch-item.core {
    color: var(--c-primary);
    border-color: var(--c-primary);
    background: var(--c-primary-soft);
    box-shadow: 0 0 12px rgba(0, 229, 255, 0.15);
}
.arch-item.algo {
    color: var(--c-accent);
    border-color: rgba(0, 255, 163, 0.4);
    background: rgba(0, 255, 163, 0.06);
}
.arch-item.src {
    color: var(--c-secondary);
    border-color: rgba(124, 77, 255, 0.4);
    background: rgba(124, 77, 255, 0.06);
}
.arch-line {
    width: 1px;
    height: 24px;
    margin-left: 70px;
    background: linear-gradient(180deg, transparent, var(--c-primary), transparent);
    opacity: 0.5;
}
.arch-layer-core {
    padding: 22px 0;
}
.arch-layer-top,
.arch-layer-bottom {
    padding: 22px 0;
}

/* ---------- 11. AI 算法矩阵 ---------- */
.algo-tabs {
    display: flex;
    gap: 8px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 56px;
    padding: 6px;
    background: var(--bg-card);
    border: 1px solid var(--c-border-soft);
    border-radius: 100px;
    width: fit-content;
    margin-left: auto;
    margin-right: auto;
}
.algo-tab {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 24px;
    font-size: 14px;
    color: var(--c-text-sub);
    border-radius: 100px;
    transition: all 0.3s var(--ease);
    letter-spacing: 0.5px;
}
.algo-tab span {
    font-family: var(--font-display);
    font-size: 11px;
    color: var(--c-text-dim);
    padding: 2px 8px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 100px;
    transition: all 0.3s var(--ease);
}
.algo-tab:hover {
    color: var(--c-text);
}
.algo-tab.active {
    color: var(--bg-base);
    background: linear-gradient(135deg, #00e5ff 0%, #7c4dff 100%);
    box-shadow: 0 4px 16px rgba(0, 229, 255, 0.4);
}
.algo-tab.active span {
    color: var(--c-primary);
    background: rgba(0, 0, 0, 0.2);
}

.algo-panels {
    position: relative;
}
.algo-panel {
    display: none;
    animation: fadeUp 0.5s var(--ease);
}
.algo-panel.active {
    display: block;
}
@keyframes fadeUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.algo-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 16px;
}
.algo-card {
    position: relative;
    padding: 24px 20px;
    background: linear-gradient(180deg, var(--bg-card) 0%, var(--bg-card-2) 100%);
    border: 1px solid var(--c-border-soft);
    border-radius: var(--radius);
    transition: all 0.4s var(--ease);
    overflow: hidden;
}
.algo-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0;
    width: 2px;
    height: 100%;
    background: var(--c-primary);
    box-shadow: 0 0 12px var(--c-primary);
    transform: scaleY(0);
    transform-origin: top;
    transition: transform 0.4s var(--ease);
}
.algo-card:hover {
    transform: translateY(-4px);
    border-color: var(--c-primary);
    box-shadow: var(--shadow-glow);
}
.algo-card:hover::before { transform: scaleY(1); }
.algo-card i {
    display: inline-block;
    font-family: var(--font-mono);
    font-style: normal;
    font-size: 11px;
    color: var(--c-primary);
    margin-bottom: 12px;
    padding: 2px 8px;
    background: var(--c-primary-soft);
    border-radius: 3px;
    letter-spacing: 1px;
}
.algo-card h4 {
    font-family: var(--font-display);
    font-size: 16px;
    font-weight: 600;
    color: var(--c-text);
    margin-bottom: 8px;
    letter-spacing: 0.5px;
}
.algo-card p {
    font-size: 12.5px;
    color: var(--c-text-sub);
    line-height: 1.6;
    margin-bottom: 14px;
    min-height: 36px;
}
.algo-id {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--c-accent);
    padding: 2px 8px;
    background: rgba(0, 255, 163, 0.08);
    border: 1px solid rgba(0, 255, 163, 0.2);
    border-radius: 3px;
    letter-spacing: 0.5px;
}

/* ---------- 12. 视频源接入 ---------- */
.stream-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}
.stream-card {
    padding: 32px 24px;
    background: var(--bg-card);
    border: 1px solid var(--c-border-soft);
    border-radius: var(--radius);
    text-align: center;
    transition: all 0.4s var(--ease);
    position: relative;
    overflow: hidden;
}
.stream-card::after {
    content: '';
    position: absolute;
    bottom: 0; left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, var(--c-primary), var(--c-secondary));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s var(--ease);
}
.stream-card:hover {
    transform: translateY(-6px);
    border-color: var(--c-primary);
    box-shadow: var(--shadow-glow);
}
.stream-card:hover::after { transform: scaleX(1); }
.stream-icon {
    display: inline-block;
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 16px;
    color: var(--c-bg-base);
    background: linear-gradient(135deg, #00e5ff 0%, #7c4dff 100%);
    padding: 8px 14px;
    border-radius: 6px;
    margin-bottom: 20px;
    letter-spacing: 1px;
    box-shadow: 0 0 16px rgba(0, 229, 255, 0.3);
}
.stream-card h4 {
    font-family: var(--font-display);
    font-size: 17px;
    font-weight: 600;
    color: var(--c-text);
    margin-bottom: 12px;
    letter-spacing: 0.5px;
}
.stream-card p {
    font-size: 12.5px;
    color: var(--c-text-sub);
    line-height: 1.7;
}

/* ---------- 13. 告警体系 ---------- */
.alarm-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 80px;
}
.alarm-card {
    position: relative;
    padding: 36px 32px;
    background: var(--bg-card);
    border: 1px solid var(--c-border-soft);
    border-radius: var(--radius);
    overflow: hidden;
    transition: all 0.4s var(--ease);
}
.alarm-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0;
    width: 4px;
    height: 100%;
}
.alarm-lv1::before { background: var(--c-danger); box-shadow: 0 0 16px var(--c-danger); }
.alarm-lv2::before { background: var(--c-warn); box-shadow: 0 0 16px var(--c-warn); }
.alarm-lv3::before { background: var(--c-yellow); box-shadow: 0 0 16px var(--c-yellow); }
.alarm-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-glow);
}
.alarm-lv1:hover { border-color: var(--c-danger); }
.alarm-lv2:hover { border-color: var(--c-warn); }
.alarm-lv3:hover { border-color: var(--c-yellow); }
.alarm-level {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 600;
    padding: 4px 10px;
    border-radius: 4px;
    margin-bottom: 16px;
    letter-spacing: 1.5px;
}
.alarm-lv1 .alarm-level { color: var(--c-danger); background: rgba(255, 51, 102, 0.1); border: 1px solid rgba(255, 51, 102, 0.3); }
.alarm-lv2 .alarm-level { color: var(--c-warn); background: rgba(255, 107, 53, 0.1); border: 1px solid rgba(255, 107, 53, 0.3); }
.alarm-lv3 .alarm-level { color: var(--c-yellow); background: rgba(255, 209, 102, 0.1); border: 1px solid rgba(255, 209, 102, 0.3); }
.alarm-card h4 {
    font-family: var(--font-display);
    font-size: 20px;
    font-weight: 600;
    color: var(--c-text);
    margin-bottom: 20px;
    letter-spacing: 0.5px;
}
.alarm-card ul {
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.alarm-card li {
    position: relative;
    padding-left: 22px;
    font-size: 13.5px;
    color: var(--c-text-sub);
}
.alarm-card li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--c-primary);
    font-size: 14px;
    line-height: 1.4;
}
.alarm-lv2 li::before { color: var(--c-warn); }
.alarm-lv3 li::before { color: var(--c-yellow); }

.alarm-channels {
    margin-bottom: 60px;
}
.channel-row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
    padding: 28px;
    background: var(--bg-card);
    border: 1px solid var(--c-border-soft);
    border-radius: var(--radius);
}
.channel-item {
    padding: 10px 22px;
    font-size: 14px;
    color: var(--c-text);
    background: var(--c-primary-soft);
    border: 1px solid var(--c-border);
    border-radius: 100px;
    letter-spacing: 0.5px;
    transition: all 0.3s var(--ease);
}
.channel-item:hover {
    background: var(--c-primary);
    color: var(--bg-base);
    box-shadow: var(--shadow-glow);
    transform: translateY(-2px);
}
.channel-arrow {
    color: var(--c-primary);
    font-size: 20px;
}

.alarm-fields {
    max-width: 800px;
    margin: 0 auto;
}
.field-table {
    background: var(--bg-card);
    border: 1px solid var(--c-border-soft);
    border-radius: var(--radius);
    overflow: hidden;
}
.ft-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 24px;
    border-bottom: 1px solid var(--c-border-soft);
    transition: all 0.3s var(--ease);
}
.ft-row:last-child { border-bottom: none; }
.ft-row:hover {
    background: rgba(0, 229, 255, 0.04);
    padding-left: 32px;
}
.ft-row span {
    font-family: var(--font-display);
    font-size: 14px;
    color: var(--c-text);
}
.ft-row i {
    font-style: normal;
    font-family: var(--font-mono);
    font-size: 13px;
    color: var(--c-text-sub);
}

/* ---------- 14. 数据存档 ---------- */
.storage-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.storage-card {
    padding: 32px 28px;
    background: var(--bg-card);
    border: 1px solid var(--c-border-soft);
    border-radius: var(--radius);
    transition: all 0.4s var(--ease);
}
.storage-card:hover {
    transform: translateY(-4px);
    border-color: var(--c-primary);
    box-shadow: var(--shadow-glow);
}
.storage-card h4 {
    font-family: var(--font-display);
    font-size: 16px;
    font-weight: 600;
    color: var(--c-primary);
    margin-bottom: 20px;
    letter-spacing: 0.5px;
}
.storage-card ul {
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.storage-card li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    font-size: 13.5px;
    color: var(--c-text-sub);
    line-height: 1.6;
}
.storage-card .dot {
    flex-shrink: 0;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    margin-top: 7px;
}
.dot.c1 { background: var(--c-primary); box-shadow: 0 0 8px var(--c-primary); }
.dot.c2 { background: var(--c-secondary); box-shadow: 0 0 8px var(--c-secondary); }
.dot.c3 { background: var(--c-accent); box-shadow: 0 0 8px var(--c-accent); }

.code-block {
    font-family: var(--font-mono);
    font-size: 12.5px;
    line-height: 1.8;
    color: var(--c-text-sub);
    background: var(--bg-base);
    padding: 20px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--c-border-soft);
    overflow-x: auto;
    white-space: pre;
}

/* ---------- 15. 部署与运维 ---------- */
.deploy-table {
    background: var(--bg-card);
    border: 1px solid var(--c-border-soft);
    border-radius: var(--radius);
    overflow: hidden;
    margin-bottom: 32px;
}
.dt-head,
.dt-row {
    display: grid;
    grid-template-columns: 1.2fr 1fr 1fr 1.5fr 1fr 1.2fr 1.8fr;
    align-items: center;
}
.dt-head {
    background: var(--c-primary-soft);
    color: var(--c-primary);
    font-family: var(--font-display);
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 1px;
    padding: 16px 20px;
    border-bottom: 1px solid var(--c-border);
}
.dt-row {
    padding: 20px;
    font-size: 13.5px;
    color: var(--c-text-sub);
    border-bottom: 1px solid var(--c-border-soft);
    transition: all 0.3s var(--ease);
}
.dt-row:last-child { border-bottom: none; }
.dt-row:hover {
    background: rgba(0, 229, 255, 0.04);
}
.dt-name {
    font-family: var(--font-display);
    font-weight: 600;
    color: var(--c-text);
    font-size: 14px;
    letter-spacing: 0.5px;
}

.deploy-features {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.df-card {
    padding: 32px 28px;
    background: var(--bg-card);
    border: 1px solid var(--c-border-soft);
    border-radius: var(--radius);
    transition: all 0.4s var(--ease);
}
.df-card:hover {
    transform: translateY(-4px);
    border-color: var(--c-primary);
    box-shadow: var(--shadow-glow);
}
.df-icon {
    font-size: 36px;
    color: var(--c-primary);
    margin-bottom: 16px;
    text-shadow: 0 0 16px rgba(0, 229, 255, 0.4);
}
.df-card h4 {
    font-family: var(--font-display);
    font-size: 17px;
    font-weight: 600;
    color: var(--c-text);
    margin-bottom: 10px;
}
.df-card p {
    font-size: 13px;
    color: var(--c-text-sub);
    line-height: 1.7;
}

/* ---------- 16. 应用场景 ---------- */
.scn-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.scn-card {
    position: relative;
    padding: 40px 32px 32px;
    background:
        linear-gradient(135deg, rgba(0, 229, 255, 0.04) 0%, transparent 50%),
        var(--bg-card);
    border: 1px solid var(--c-border-soft);
    border-radius: var(--radius);
    transition: all 0.4s var(--ease);
    overflow: hidden;
}
.scn-card::before {
    content: '';
    position: absolute;
    top: 0; right: 0;
    width: 100px;
    height: 100px;
    background: radial-gradient(circle, var(--c-primary-soft), transparent 70%);
    border-radius: 50%;
    transform: translate(40%, -40%);
    transition: all 0.6s var(--ease);
}
.scn-card:hover {
    transform: translateY(-6px);
    border-color: var(--c-primary);
    box-shadow: var(--shadow-glow);
}
.scn-card:hover::before {
    transform: translate(30%, -30%) scale(1.5);
}
.scn-num {
    position: relative;
    z-index: 1;
    display: inline-block;
    font-family: var(--font-display);
    font-weight: 800;
    font-size: 14px;
    color: var(--c-bg-base);
    background: linear-gradient(135deg, #00e5ff 0%, #7c4dff 100%);
    padding: 6px 14px;
    border-radius: 6px;
    margin-bottom: 20px;
    letter-spacing: 1px;
}
.scn-card h4 {
    position: relative;
    z-index: 1;
    font-family: var(--font-display);
    font-size: 22px;
    font-weight: 600;
    color: var(--c-text);
    margin-bottom: 14px;
    letter-spacing: 0.5px;
}
.scn-card p {
    position: relative;
    z-index: 1;
    font-size: 14px;
    color: var(--c-text-sub);
    line-height: 1.7;
}

/* ---------- 17. 联系合作 ---------- */
.contact {
    background:
        radial-gradient(ellipse at 50% 0%, rgba(0, 229, 255, 0.06), transparent 50%);
}
.contact-wrap {
    display: flex;
    flex-direction: column;
    align-items: center;
    max-width: 720px;
    margin: 0 auto;
}
.contact-left {
    width: 100%;
    text-align: center;
}
.contact-left .section-tag { margin-bottom: 24px; }
.contact-left .section-title { text-align: center; }
.contact-desc {
    color: var(--c-text-sub);
    font-size: 15px;
    line-height: 1.9;
    margin-bottom: 48px;
    text-align: center;
}
.contact-list {
    display: flex;
    flex-direction: column;
    gap: 18px;
    max-width: 560px;
    margin: 0 auto;
}
.contact-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 20px;
    background: var(--bg-card);
    border: 1px solid var(--c-border-soft);
    border-radius: var(--radius);
    transition: all 0.3s var(--ease);
    text-align: left;
}
.contact-item:hover {
    border-color: var(--c-primary);
    transform: translateX(4px);
    box-shadow: var(--shadow-glow);
}
.contact-item.is-wechat {
    padding: 20px 24px;
    background:
        linear-gradient(135deg, rgba(0, 229, 255, 0.08) 0%, rgba(124, 77, 255, 0.06) 100%);
    border: 1px solid var(--c-border);
    box-shadow: 0 0 24px rgba(0, 229, 255, 0.15);
    position: relative;
    overflow: hidden;
}
.contact-item.is-wechat::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--c-primary), transparent);
    opacity: 0.6;
}
.contact-item.is-wechat .ci-val {
    font-family: var(--font-display);
    font-size: 22px;
    font-weight: 700;
    letter-spacing: 1.5px;
    background: linear-gradient(90deg, #00e5ff 0%, #7c4dff 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}
.ci-tag {
    flex-shrink: 0;
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--c-primary);
    letter-spacing: 1.5px;
    padding: 4px 10px;
    background: var(--c-primary-soft);
    border-radius: 4px;
}
.ci-val {
    font-size: 14.5px;
    color: var(--c-text);
    letter-spacing: 0.5px;
}

/* ---------- 18. 页脚 ---------- */
.footer {
    padding: 60px 0 30px;
    background: var(--bg-deep);
    border-top: 1px solid var(--c-border-soft);
    position: relative;
}
.footer::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--c-primary), transparent);
    opacity: 0.5;
}
.footer-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 24px;
}
.footer-brand {
    display: flex;
    align-items: center;
    gap: 14px;
}
.footer-name {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 14px;
    color: var(--c-text);
    letter-spacing: 0.5px;
}
.footer-sub {
    font-size: 12px;
    color: var(--c-text-sub);
    margin-top: 2px;
}
.footer-meta {
    display: flex;
    gap: 16px;
}
.beian {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    font-size: 13px;
    color: var(--c-text-sub);
    background: var(--bg-card);
    border: 1px solid var(--c-border-soft);
    border-radius: 100px;
    transition: all 0.3s var(--ease);
    letter-spacing: 0.5px;
}
.beian:hover {
    color: var(--c-primary);
    border-color: var(--c-primary);
    box-shadow: var(--shadow-glow);
}
.beian-icon {
    color: var(--c-danger);
    font-size: 10px;
}
.footer-copy {
    flex-basis: 100%;
    text-align: center;
    font-size: 12px;
    color: var(--c-text-dim);
    margin-top: 16px;
    padding-top: 20px;
    border-top: 1px solid var(--c-border-soft);
    font-family: var(--font-mono);
    letter-spacing: 0.5px;
}

/* ---------- 19. Reveal Animation ---------- */
[data-reveal] {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
}
[data-reveal].revealed {
    opacity: 1;
    transform: translateY(0);
}

/* ---------- 20. 响应式 ---------- */
@media (max-width: 1200px) {
    .metric-grid { grid-template-columns: repeat(2, 1fr); }
    .overview-grid { grid-template-columns: repeat(2, 1fr); }
    .feature-grid { grid-template-columns: repeat(2, 1fr); }
    .algo-grid { grid-template-columns: repeat(3, 1fr); }
    .stream-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 1024px) {
    .nav-menu { display: none; }
    .nav-menu.open {
        display: flex;
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        flex-direction: column;
        background: rgba(5, 7, 13, 0.95);
        backdrop-filter: blur(18px);
        padding: 20px;
        gap: 8px;
        border-bottom: 1px solid var(--c-border);
    }
    .nav-menu.open a {
        padding: 12px 20px;
        border-radius: 8px;
    }
    .nav-menu.open a:hover,
    .nav-menu.open a.active {
        background: var(--c-primary-soft);
    }
    .nav-toggle { display: flex; }
    .nav-cta { display: none; }

    .arch-layer {
        flex-wrap: wrap;
        gap: 16px;
    }
    .arch-title { width: auto; }
    .arch-side-tag { width: 32px; height: 32px; }
    .arch-line { margin-left: 50px; }

    .contact-wrap {
        gap: 48px;
    }
    .contact-left .section-title { text-align: center; }
    .contact-desc { text-align: center; }
    .contact-list { max-width: 480px; margin: 0 auto; }

    .dt-head,
    .dt-row {
        grid-template-columns: 1fr 1fr 1fr;
        gap: 12px;
    }
    .dt-head > div:nth-child(n+4),
    .dt-row > div:nth-child(n+4) {
        display: none;
    }
}

@media (max-width: 768px) {
    .section { padding: 80px 0; }
    .section-head { margin-bottom: 56px; }

    .hero { min-height: 90vh; padding: 100px 20px 60px; }
    .hero-title { font-size: clamp(36px, 10vw, 56px); }
    .hero-sub { font-size: 15px; }
    .hero-tags { font-size: 11px; gap: 16px; }

    .metric-grid,
    .overview-grid,
    .feature-grid,
    .alarm-grid,
    .storage-grid,
    .deploy-features,
    .scn-grid {
        grid-template-columns: 1fr;
    }
    .algo-grid { grid-template-columns: repeat(2, 1fr); }
    .stream-grid { grid-template-columns: 1fr; }

    .algo-tabs {
        width: 100%;
        flex-wrap: wrap;
        border-radius: var(--radius);
    }
    .algo-tab { flex: 1; min-width: 130px; justify-content: center; }

    .channel-row { padding: 20px; gap: 12px; }
    .channel-item { font-size: 12px; padding: 8px 16px; }
    .channel-arrow { display: none; }

    .footer-inner { justify-content: center; text-align: center; flex-direction: column; }
}

/* ---------- 21. Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    [data-reveal] { opacity: 1; transform: none; }
}