/* ============================================
   Exo Cloud Cluster - 企业级官网主页样式
   设计：暗黑科技风格 / 蓝紫霓虹 / 赛博质感
   参照：index-home设计开发参考模板主页系统
   ============================================ */

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

:root {
    --primary: #00d4ff;
    --primary-dark: #00a8cc;
    --secondary: #a855f7;
    --secondary-light: #c084fc;
    --accent: #7b2dff;
    --accent2: #06b6d4;
    --bg-dark: #0a0a0f;
    --bg-darker: #050508;
    --bg-card: rgba(15, 20, 35, 0.6);
    --bg-card-hover: rgba(20, 28, 50, 0.85);
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.7);
    --text-muted: rgba(255, 255, 255, 0.5);
    --glass-bg: rgba(15, 20, 35, 0.6);
    --glass-border: rgba(0, 212, 255, 0.2);
    --glass-border-hover: rgba(0, 212, 255, 0.35);
    --glow-primary: 0 0 30px rgba(0, 212, 255, 0.5);
    --glow-secondary: 0 0 30px rgba(168, 85, 247, 0.4);
    --glow-card: 0 0 25px rgba(0, 212, 255, 0.15);
    --radius-sm: 8px;
    --radius: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
    background: var(--bg-dark);
    min-height: 100vh;
    overflow-x: hidden;
    color: var(--text-primary);
    position: relative;
    line-height: 1.6;
}

/* ========== 背景特效 ========== */
.bg-effects {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}

.gradient-flow {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(ellipse at 20% 80%, rgba(0, 212, 255, 0.12) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, rgba(168, 85, 247, 0.1) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 50%, rgba(123, 45, 255, 0.06) 0%, transparent 60%);
    animation: gradientShift 15s ease-in-out infinite;
    pointer-events: none;
}

@keyframes gradientShift {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.8; transform: scale(1.1); }
}

.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.45;
    animation: orbFloat 20s ease-in-out infinite;
    pointer-events: none;
}

.orb-1 {
    display: none;
}

.orb-2 {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, var(--secondary), transparent 70%);
    bottom: -150px;
    right: -150px;
    animation-delay: -7s;
}

.orb-3 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, var(--accent), transparent 70%);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: -14s;
}

@keyframes orbFloat {
    0%, 100% { transform: translate(0, 0) scale(1); opacity: 0.45; }
    25% { transform: translate(50px, -50px) scale(1.1); opacity: 0.55; }
    50% { transform: translate(-30px, 30px) scale(0.95); opacity: 0.35; }
    75% { transform: translate(30px, 50px) scale(1.05); opacity: 0.5; }
}

.grid-lines {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        linear-gradient(rgba(0, 212, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 212, 255, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    animation: gridMove 25s linear infinite;
    pointer-events: none;
}

@keyframes gridMove {
    0% { transform: perspective(1000px) rotateX(60deg) translateY(0); }
    100% { transform: perspective(1000px) rotateX(60deg) translateY(60px); }
}

.particles-container {
    position: absolute;
    width: 100%;
    height: 100%;
    overflow: hidden;
    pointer-events: none;
}

.particle {
    position: absolute;
    background: rgba(0, 212, 255, 0.6);
    border-radius: 50%;
    animation: particleFloat 20s infinite;
    pointer-events: none;
}

@keyframes particleFloat {
    0%, 100% { transform: translateY(0) translateX(0); opacity: 0; }
    10% { opacity: 1; }
    90% { opacity: 1; }
    100% { transform: translateY(-100vh) translateX(50px); opacity: 0; }
}

.connection-lines {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0.25;
    pointer-events: none;
}

.conn-line {
    fill: none;
    stroke: url(#lineGradient);
    stroke-width: 0.3;
    animation: linePulse 4s ease-in-out infinite;
}

.conn-line.cl-2 { animation-delay: -1.5s; }
.conn-line.cl-3 { animation-delay: -3s; }

@keyframes linePulse {
    0%, 100% { opacity: 0.2; }
    50% { opacity: 0.5; }
}

/* ========== 左右两侧装饰粒子 ========== */
.side-particles {
    position: fixed;
    top: 0;
    width: 150px;
    height: 100%;
    pointer-events: none;
    z-index: 1;
}

.side-particles.left {
    left: 0;
    background: linear-gradient(to right, rgba(0, 212, 255, 0.03), transparent);
}

.side-particles.right {
    right: 0;
    background: linear-gradient(to left, rgba(168, 85, 247, 0.03), transparent);
}

/* ========== 左右两侧浮动光点 ========== */
.floating-dots {
    position: fixed;
    top: 0;
    width: 200px;
    height: 100%;
    pointer-events: none;
    z-index: 1;
}

.floating-dots.left { left: 20px; }
.floating-dots.right { right: 20px; }

.floating-dot {
    position: absolute;
    width: 4px;
    height: 4px;
    background: var(--primary);
    border-radius: 50%;
    opacity: 0.3;
    animation: dotFloat 8s ease-in-out infinite;
}

.floating-dots.right .floating-dot {
    background: var(--secondary);
}

@keyframes dotFloat {
    0%, 100% { transform: translateY(0) scale(1); opacity: 0.3; }
    50% { transform: translateY(-30px) scale(1.5); opacity: 0.6; }
}

/* ========== 头部导航 ========== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100000;
    padding: 20px 40px;
    background: linear-gradient(to bottom, rgba(10, 10, 15, 0.9), transparent);
    pointer-events: none;
}

.header * { pointer-events: auto; }

.header-inner {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    position: relative;
    z-index: 100001;
}

.logo-icon-link { text-decoration: none; }

.logo-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    color: #fff;
    box-shadow: 0 0 20px rgba(0, 212, 255, 0.4);
    transition: var(--transition);
}

.logo-icon:hover {
    box-shadow: 0 0 35px rgba(0, 212, 255, 0.6);
    transform: scale(1.05);
}

.logo-text {
    font-size: 20px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.header-auth {
    display: flex;
    gap: 12px;
    align-items: center;
}

.fullscreen-btn {
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid rgba(0, 212, 255, 0.3);
    border-radius: 8px;
    padding: 8px;
    color: var(--primary);
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.fullscreen-btn:hover {
    background: rgba(0, 212, 255, 0.2);
    box-shadow: 0 0 15px rgba(0, 212, 255, 0.3);
}

.fullscreen-btn svg { display: block; }

/* ========== 主内容区 ========== */
.main-content {
    position: relative;
    z-index: 10;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.hero-section {
    width: 100%;
    max-width: 1600px;
}

.orbit-system {
    position: relative;
    width: 100%;
    height: 850px;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    z-index: 15;
    margin-top: 60px;
}

/* ========== 轨道环 ========== */
.orbit-ring {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    border-radius: 50%;
    pointer-events: none;
    overflow: visible;
}

.orbit-outer {
    width: 800px;
    height: 800px;
    animation: rotate 80s linear infinite;
}

.orbit-inner {
    width: 550px;
    height: 550px;
    animation: rotateReverse 60s linear infinite;
}

@keyframes rotate {
    from { transform: translate(-50%, -50%) rotate(0deg); }
    to { transform: translate(-50%, -50%) rotate(360deg); }
}

@keyframes rotateReverse {
    from { transform: translate(-50%, -50%) rotate(360deg); }
    to { transform: translate(-50%, -50%) rotate(0deg); }
}

/* ========== 轨道项目 ========== */
.orbit-item {
    position: absolute;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    cursor: pointer;
    transition: transform 0.3s ease;
    pointer-events: auto;
    z-index: 9999;
}

.orbit-outer .orbit-item {
    transform-origin: center center;
    animation: counterRotate 80s linear infinite;
}

.orbit-inner .orbit-item {
    transform-origin: center center;
    animation: counterRotateReverse 60s linear infinite;
}

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

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

.orbit-item:hover {
    transform: scale(1.2) !important;
    z-index: 99999;
}

.orbit-icon {
    width: 32px;
    height: 32px;
    object-fit: contain;
    filter: drop-shadow(0 0 8px rgba(0, 212, 255, 0.5));
    transition: all 0.3s ease;
    display: none;
}

.orbit-item:hover .orbit-icon {
    filter: drop-shadow(0 0 15px rgba(0, 212, 255, 0.8));
}

.orbit-icon-fallback {
    filter: drop-shadow(0 0 8px rgba(0, 212, 255, 0.5));
    transition: all 0.3s ease;
    display: flex;
}

.orbit-item:hover .orbit-icon-fallback {
    filter: drop-shadow(0 0 15px rgba(0, 212, 255, 0.8));
}

.orbit-name {
    font-size: 11px;
    color: var(--text-muted);
    white-space: nowrap;
    opacity: 0;
    transform: translateY(-5px);
    transition: all 0.3s ease;
    background: rgba(0, 0, 0, 0.7);
    padding: 2px 8px;
    border-radius: 10px;
    backdrop-filter: blur(10px);
}

.orbit-item:hover .orbit-name {
    opacity: 1;
    transform: translateY(0);
}

/* ========== 中心内容 ========== */
.center-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 50;
    text-align: center;
    width: 380px;
    height: 380px;
    background: radial-gradient(circle, rgba(15, 20, 35, 0.9) 0%, rgba(15, 20, 35, 0.6) 70%, transparent 100%);
    border-radius: 50%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 40px;
    border: 1px solid rgba(0, 212, 255, 0.2);
    box-shadow:
        inset 0 0 60px rgba(0, 212, 255, 0.1),
        0 0 60px rgba(0, 0, 0, 0.5);
    pointer-events: none;
}

.center-content > * { pointer-events: auto; }

.center-content::before {
    content: '';
    position: absolute;
    inset: -3px;
    border-radius: 50%;
    background: conic-gradient(from 0deg, transparent, rgba(0, 212, 255, 0.3), transparent, rgba(168, 85, 247, 0.3), transparent);
    animation: rotate 15s linear infinite;
    z-index: -1;
}

.center-content::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(15, 20, 35, 0.95) 0%, transparent 100%);
    z-index: -1;
}

.center-badge {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid rgba(0, 212, 255, 0.3);
    border-radius: 20px;
    font-size: 11px;
    color: var(--primary);
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 20px;
    animation: badgeGlow 3s ease-in-out infinite;
}

@keyframes badgeGlow {
    0%, 100% { box-shadow: 0 0 10px rgba(0, 212, 255, 0.2); }
    50% { box-shadow: 0 0 20px rgba(0, 212, 255, 0.4); }
}

.center-icon-wrapper {
    position: relative;
    width: 50px;
    height: 50px;
    margin-bottom: 12px;
}

.loading-spinner {
    position: absolute;
    top: 0; left: 0;
    width: 50px; height: 50px;
    border: 2px solid rgba(0, 212, 255, 0.2);
    border-top: 2px solid var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    display: none;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.center-icon {
    width: 50px;
    height: 50px;
    animation: iconFloat 3s ease-in-out infinite;
    display: none;
}

@keyframes iconFloat {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-6px); }
}

.center-title {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 10px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    min-height: 28px;
}

.center-desc {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.5;
    margin-bottom: 16px;
    min-height: 40px;
    max-width: 300px;
}

.center-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 24px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    text-decoration: none;
    border-radius: 25px;
    font-size: 13px;
    font-weight: 600;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(0, 212, 255, 0.4);
    opacity: 0;
    transform: translateY(10px);
    pointer-events: none;
}

.center-btn.visible {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

.center-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(0, 212, 255, 0.6);
}

.typing-cursor {
    display: inline-block;
    width: 2px;
    height: 1.2em;
    background: var(--primary);
    margin-left: 2px;
    animation: cursorBlink 0.8s infinite;
    vertical-align: middle;
}

@keyframes cursorBlink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

/* ========== 飞出卡片 ========== */
.orbit-item.flyout-active {
    transition: all 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
    transform: scale(1.1);
}

.orbit-item.flyout-active .orbit-icon {
    width: 36px;
    height: 36px;
    filter: drop-shadow(0 0 12px rgba(0, 212, 255, 0.8));
}

.orbit-item.flyout-active .orbit-icon-fallback {
    width: 36px;
    height: 36px;
    filter: drop-shadow(0 0 12px rgba(0, 212, 255, 0.8));
}

.orbit-item.flyout-active .orbit-name {
    opacity: 0;
}

.flyout-card {
    position: fixed;
    z-index: 999998;
    opacity: 0;
    transform: scale(0.8) translateY(20px);
    transition: all 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
    pointer-events: none;
}

.flyout-card.visible {
    opacity: 1;
    transform: scale(1) translateY(0);
    pointer-events: auto;
}

.flyout-card-inner {
    background: linear-gradient(135deg, rgba(15, 20, 35, 0.9), rgba(25, 30, 50, 0.9));
    border: 1px solid rgba(0, 212, 255, 0.3);
    border-radius: 12px;
    padding: 12px 16px;
    min-width: 160px;
    max-width: 200px;
    box-shadow: 
        0 10px 30px rgba(0, 0, 0, 0.4),
        0 0 20px rgba(0, 212, 255, 0.15),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(15px);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.flyout-card-icon {
    width: 36px;
    height: 36px;
    object-fit: contain;
    margin-bottom: 8px;
    filter: drop-shadow(0 0 10px rgba(0, 212, 255, 0.4));
}

.flyout-card-title {
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 4px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.flyout-card-desc {
    font-size: 10px;
    color: rgba(255, 255, 255, 0.6);
    line-height: 1.4;
    margin-bottom: 8px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.flyout-card-btn {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 5px 12px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    text-decoration: none;
    border-radius: 15px;
    font-size: 10px;
    font-weight: 500;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(0, 212, 255, 0.3);
}

.flyout-card-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 15px rgba(0, 212, 255, 0.5);
}

/* ========== Section 通用 ========== */
.section {
    position: relative;
    z-index: 10;
    padding: 100px 40px;
    width: 100%;
}

.section-header {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 64px;
}

.section-badge {
    display: inline-block;
    padding: 5px 16px;
    background: rgba(0, 212, 255, 0.08);
    border: 1px solid rgba(0, 212, 255, 0.25);
    border-radius: 50px;
    color: var(--primary);
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 20px;
}

.section-title {
    font-size: clamp(28px, 4vw, 44px);
    font-weight: 800;
    margin-bottom: 16px;
    line-height: 1.3;
}

.section-title .gradient-text {
    background: linear-gradient(135deg, var(--primary), var(--secondary-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-desc {
    font-size: 17px;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ========== Architecture Section ========== */
.architecture-section {
    background: linear-gradient(to bottom, transparent, rgba(0, 212, 255, 0.03), transparent);
}

.arch-layers {
    max-width: 1000px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.arch-layer {
    display: flex;
    align-items: center;
    gap: 24px;
    padding: 28px 32px;
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    cursor: default;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.arch-layer::before {
    content: '';
    position: absolute;
    left: 0; top: 0;
    width: 4px; height: 100%;
    transition: var(--transition);
}

.arch-layer:nth-child(1)::before { background: var(--primary); }
.arch-layer:nth-child(2)::before { background: linear-gradient(180deg, var(--primary), var(--secondary)); }
.arch-layer:nth-child(3)::before { background: var(--secondary); }
.arch-layer:nth-child(4)::before { background: linear-gradient(180deg, var(--secondary), var(--accent)); }
.arch-layer:nth-child(5)::before { background: var(--accent); }

.arch-layer:hover {
    border-color: var(--glass-border-hover);
    box-shadow: var(--glow-card);
    transform: translateX(8px);
}

.arch-layer-icon {
    width: 56px; height: 56px;
    min-width: 56px;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: #fff;
    flex-shrink: 0;
}

.arch-layer:nth-child(1) .arch-layer-icon { background: linear-gradient(135deg, var(--primary), var(--accent2)); }
.arch-layer:nth-child(2) .arch-layer-icon { background: linear-gradient(135deg, var(--accent), var(--secondary)); }
.arch-layer:nth-child(3) .arch-layer-icon { background: linear-gradient(135deg, var(--secondary), var(--secondary-light)); }
.arch-layer:nth-child(4) .arch-layer-icon { background: linear-gradient(135deg, var(--accent2), var(--primary)); }
.arch-layer:nth-child(5) .arch-layer-icon { background: linear-gradient(135deg, var(--accent), var(--primary)); }

.arch-layer-content h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 4px;
}

.arch-layer-content p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.5;
}

.arch-layer-badge {
    margin-left: auto;
    padding: 4px 12px;
    background: rgba(0, 212, 255, 0.08);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: 50px;
    font-size: 11px;
    color: var(--primary);
    font-weight: 600;
    white-space: nowrap;
    flex-shrink: 0;
}

/* ========== Features Grid ========== */
.features-grid {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 24px;
}

.feature-card {
    padding: 32px;
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.feature-card::after {
    content: '';
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: radial-gradient(ellipse at 0% 0%, rgba(0, 212, 255, 0.06) 0%, transparent 70%);
    opacity: 0;
    transition: var(--transition);
}

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

.feature-card:hover::after { opacity: 1; }

.feature-card-icon {
    width: 52px; height: 52px;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    color: #fff;
    margin-bottom: 20px;
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.2), rgba(168, 85, 247, 0.2));
    border: 1px solid rgba(0, 212, 255, 0.2);
}

.feature-card h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 8px;
}

.feature-card p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ========== Platforms Section ========== */
.platforms-grid {
    max-width: 1100px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 16px;
}

.platform-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    padding: 24px 16px;
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    transition: var(--transition);
    cursor: default;
}

.platform-item:hover {
    border-color: var(--glass-border-hover);
    box-shadow: var(--glow-card);
    transform: translateY(-4px);
}

.platform-item i {
    font-size: 32px;
    color: var(--primary);
    transition: var(--transition);
}

.platform-item:hover i {
    color: var(--secondary-light);
    transform: scale(1.1);
}

.platform-item span {
    font-size: 13px;
    color: var(--text-secondary);
    font-weight: 500;
}

/* ========== Tech Stack Section ========== */
.tech-stack-grid {
    max-width: 1000px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.tech-item {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 20px;
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    transition: var(--transition);
}

.tech-item:hover {
    border-color: var(--glass-border-hover);
    transform: translateY(-2px);
}

.tech-item-icon {
    width: 40px; height: 40px;
    min-width: 40px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.2), rgba(168, 85, 247, 0.2));
    color: var(--primary);
}

.tech-item-content h4 {
    font-size: 14px;
    font-weight: 600;
}

.tech-item-content span {
    font-size: 12px;
    color: var(--text-muted);
}

/* ========== Download Section ========== */
.download-section {
    background: linear-gradient(to bottom, transparent, rgba(0, 212, 255, 0.03), transparent);
}

.download-grid {
    max-width: 1000px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
}

.download-card {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 24px;
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    color: var(--text-primary);
}

.download-card:hover {
    border-color: var(--primary);
    box-shadow: 0 0 30px rgba(0, 212, 255, 0.2);
    transform: translateY(-3px);
}

.download-card-icon {
    width: 50px; height: 50px;
    min-width: 50px;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    color: #fff;
    background: linear-gradient(135deg, var(--primary), var(--accent));
}

.download-card-info h4 {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 4px;
}

.download-card-info span {
    font-size: 12px;
    color: var(--text-muted);
}

.download-card-arrow {
    margin-left: auto;
    color: var(--primary);
    font-size: 18px;
    transition: var(--transition);
}

.download-card:hover .download-card-arrow {
    transform: translateX(4px);
}

.download-note {
    max-width: 700px;
    margin: 40px auto 0;
    padding: 20px 24px;
    background: rgba(0, 212, 255, 0.05);
    border: 1px solid rgba(0, 212, 255, 0.15);
    border-radius: var(--radius);
    text-align: center;
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
}

.download-note i {
    color: var(--primary);
    margin-right: 6px;
}

/* ========== Quick Start / Tutorial Section ========== */
.tutorial-steps {
    max-width: 900px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.tutorial-step {
    display: flex;
    gap: 20px;
    padding: 24px 28px;
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    transition: var(--transition);
}

.tutorial-step:hover {
    border-color: var(--glass-border-hover);
    box-shadow: var(--glow-card);
}

.tutorial-step-num {
    width: 44px; height: 44px;
    min-width: 44px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    font-weight: 800;
    color: #fff;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    flex-shrink: 0;
}

.tutorial-step-content h4 {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 6px;
}

.tutorial-step-content p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.5;
}

.tutorial-step-content code {
    display: inline-block;
    padding: 2px 8px;
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: 4px;
    font-family: 'Consolas', 'Courier New', monospace;
    font-size: 13px;
    color: var(--primary);
    margin: 2px 0;
}

.tutorial-code-block {
    margin-top: 8px;
    padding: 16px;
    background: rgba(0, 0, 0, 0.4);
    border: 1px solid rgba(0, 212, 255, 0.15);
    border-radius: var(--radius-sm);
    font-family: 'Consolas', 'Courier New', monospace;
    font-size: 13px;
    color: var(--text-secondary);
    overflow-x: auto;
    white-space: pre-wrap;
    line-height: 1.6;
}

/* ========== CTA Section ========== */
.cta-card {
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
    padding: 60px 40px;
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
}

.cta-card h2 {
    font-size: 28px;
    font-weight: 800;
    margin-bottom: 16px;
}

.cta-card p {
    color: var(--text-secondary);
    margin-bottom: 32px;
    font-size: 16px;
}

.cta-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 36px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: #fff;
    font-size: 16px;
    font-weight: 700;
    border-radius: var(--radius);
    text-decoration: none;
    border: none;
    cursor: pointer;
    box-shadow: 0 0 30px rgba(0, 212, 255, 0.35);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0; left: -100%;
    width: 100%; height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: 0.5s;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 0 50px rgba(0, 212, 255, 0.5);
}

.btn-primary:hover::before { left: 100%; }

.btn-outline {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 36px;
    background: transparent;
    color: var(--primary);
    font-size: 16px;
    font-weight: 600;
    border: 2px solid rgba(0, 212, 255, 0.4);
    border-radius: var(--radius);
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition);
}

.btn-outline:hover {
    border-color: var(--primary);
    background: rgba(0, 212, 255, 0.08);
    box-shadow: 0 0 25px rgba(0, 212, 255, 0.2);
    transform: translateY(-3px);
}

/* ========== Footer ========== */
.footer {
    position: relative;
    z-index: 10;
    padding: 60px 40px 30px;
    background: rgba(5, 5, 16, 0.8);
    border-top: 1px solid rgba(0, 212, 255, 0.1);
    width: 100%;
}

.footer-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 24px;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 10px;
}

.footer-brand-icon {
    width: 36px; height: 36px;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    color: #fff;
}

.footer-brand span {
    font-size: 16px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary), var(--secondary-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-links {
    display: flex;
    gap: 24px;
    flex-wrap: wrap;
}

.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 13px;
    transition: var(--transition);
}

.footer-links a:hover { color: var(--primary); }

.footer-copyright {
    text-align: center;
    margin-top: 32px;
    padding-top: 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    font-size: 12px;
    color: var(--text-muted);
}

/* ========== 友情链接 ========== */
.footer-friendly-links {
    max-width: 1200px;
    margin: 0 auto;
    padding: 32px 0 0;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    margin-top: 32px;
}

.friendly-links-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-muted);
    margin-bottom: 20px;
    text-align: center;
    letter-spacing: 2px;
    position: relative;
}

.friendly-links-title::after {
    content: '';
    display: block;
    width: 40px;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--primary), transparent);
    margin: 8px auto 0;
    border-radius: 1px;
}

.friendly-links-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
}

.friendly-link-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 8px;
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
}

.friendly-link-item:hover {
    background: rgba(0, 212, 255, 0.08);
    border-color: rgba(0, 212, 255, 0.2);
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(0, 212, 255, 0.1);
}

.friendly-link-icon {
    width: 28px;
    height: 28px;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    font-weight: 700;
    color: #fff;
    flex-shrink: 0;
}

.friendly-link-name {
    font-size: 13px;
    color: var(--text-muted);
    transition: color 0.3s ease;
    white-space: nowrap;
}

.friendly-link-item:hover .friendly-link-name {
    color: var(--primary);
}

/* ========== 滚动动画 ========== */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: var(--transition-slow);
}

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

/* ========== Loading Modal ========== */
.download-modal {
    display: none;
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: rgba(0, 0, 0, 0.7);
    z-index: 9999;
    justify-content: center;
    align-items: center;
}

.download-modal.active { display: flex; }

.download-modal-content {
    padding: 40px;
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    text-align: center;
    max-width: 400px;
    width: 90%;
}

.download-modal-spinner {
    width: 50px; height: 50px;
    border: 3px solid rgba(0, 212, 255, 0.2);
    border-top: 3px solid var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 0 auto 20px;
}

.download-modal h3 {
    font-size: 18px;
    margin-bottom: 8px;
}

.download-modal p {
    font-size: 14px;
    color: var(--text-secondary);
}

/* ========== Toast 提示 ========== */
.toast {
    position: fixed;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    padding: 16px 28px;
    background: var(--bg-card);
    border: 1px solid var(--primary);
    border-radius: var(--radius);
    color: #fff;
    font-size: 14px;
    z-index: 10000;
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 0 30px rgba(0, 212, 255, 0.3);
}

.toast.show {
    transform: translateX(-50%) translateY(0);
}

.toast.success { border-color: #22c55e; }
.toast.error { border-color: #ef4444; }

/* ========== 响应式设计 ========== */
@media (max-width: 1200px) {
    .orbit-outer { width: 650px; height: 650px; }
    .orbit-inner { width: 450px; height: 450px; }
    .center-content { width: 320px; height: 320px; }
}

@media (max-width: 1024px) {
    .header { padding: 12px 24px; }
    .section { padding: 60px 24px; }
    .arch-layer { padding: 20px 24px; }
    .arch-layer-badge { display: none; }
    .features-grid { grid-template-columns: 1fr; }
    .platforms-grid { grid-template-columns: repeat(4, 1fr); }
}

@media (max-width: 768px) {
    .header { padding: 15px 20px; }
    .orbit-system { height: 650px; }
    .orbit-outer { width: 500px; height: 500px; }
    .orbit-inner { width: 350px; height: 350px; }
    .orbit-icon { width: 26px; height: 26px; }
    .orbit-icon-fallback { width: 26px !important; height: 26px !important; font-size: 12px !important; }
    .center-content { width: 260px; height: 260px; padding: 30px; }
    .center-title { font-size: 18px; }
    .center-desc { font-size: 11px; }
    
    .section-title { font-size: 26px; }
    .section-header { margin-bottom: 40px; }
    .section { padding: 60px 24px; }
    
    .arch-layer { flex-direction: column; text-align: center; gap: 12px; }
    .arch-layer:hover { transform: translateX(0) translateY(-4px); }
    .arch-layer-badge { display: inline-block; margin-left: 0; }
    
    .platforms-grid { grid-template-columns: repeat(3, 1fr); }
    .download-grid { grid-template-columns: 1fr; }
    .tech-stack-grid { grid-template-columns: repeat(2, 1fr); }
    
    .cta-buttons { flex-direction: column; align-items: center; }
    .btn-primary, .btn-outline { width: 100%; max-width: 300px; justify-content: center; }
    
    .footer-inner { flex-direction: column; text-align: center; }
    .footer-links { justify-content: center; }
    .friendly-links-grid { gap: 8px; }
    .friendly-link-item { padding: 6px 12px; }
}

@media (max-width: 480px) {
    .orbit-outer { width: 360px; height: 360px; }
    .orbit-inner { width: 250px; height: 250px; }
    .orbit-icon { width: 22px; height: 22px; }
    .orbit-icon-fallback { width: 22px !important; height: 22px !important; font-size: 10px !important; }
    .center-content { width: 200px; height: 200px; padding: 20px; }
    .center-title { font-size: 14px; }
    .center-desc { font-size: 10px; }
    
    .section { padding: 40px 16px; }
    .platforms-grid { grid-template-columns: repeat(2, 1fr); }
    .tech-stack-grid { grid-template-columns: 1fr; }
}