/* ============================================
   六维一体化AI教育平台 - 官网样式 (Premium Edition)
   ============================================ */

/* CSS Variables */
:root {
    /* Colors - Cyber/Tech Theme */
    --primary: #6366f1;
    /* Indigo 500 */
    --primary-light: #818cf8;
    /* Indigo 400 */
    --primary-dark: #4f46e5;
    --primary-glow: rgba(99, 102, 241, 0.5);

    --accent: #06b6d4;
    /* Cyan 500 */
    --accent-light: #22d3ee;
    /* Cyan 400 */
    --accent-glow: rgba(6, 182, 212, 0.5);

    --purple: #8b5cf6;
    /* Violet 500 */
    --purple-light: #a78bfa;

    --gold: #f59e0b;
    /* Amber 500 */
    --gold-light: #fbbf24;

    /* Backgrounds - Deep Space */
    --bg-dark: #030306;
    --bg-darker: #010102;
    --bg-card: rgba(15, 15, 25, 0.7);
    --bg-card-hover: rgba(25, 25, 45, 0.85);

    /* Text */
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.7);
    --text-muted: rgba(255, 255, 255, 0.4);

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--primary), var(--purple));
    --gradient-accent: linear-gradient(135deg, var(--accent), var(--primary));
    --gradient-gold: linear-gradient(135deg, var(--gold), var(--gold-light));
    --gradient-text: linear-gradient(to right, #fff, #a5b4fc);
    --gradient-glass: linear-gradient(145deg, rgba(255, 255, 255, 0.08) 0%, rgba(255, 255, 255, 0.02) 100%);
    --gradient-shine: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);

    /* Effects */
    --glass-border: 1px solid rgba(255, 255, 255, 0.1);
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.4);
    --glow-primary: 0 0 40px rgba(99, 102, 241, 0.4);
    --glow-accent: 0 0 40px rgba(6, 182, 212, 0.3);

    /* Spacing & Layout */
    --container-max: 1280px;
    --header-height: 80px;
    --section-padding: 120px;

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 32px;
    --radius-full: 999px;

    /* Typography */
    --font-family: 'Noto Sans SC', system-ui, -apple-system, sans-serif;

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ============================================
   🎬 Premium Loading Screen
   ============================================ */
.loading-screen {
    position: fixed;
    inset: 0;
    z-index: 99999;
    background: var(--bg-darker);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.8s ease, visibility 0.8s ease;
}

.loading-screen.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.loader-content {
    text-align: center;
}

.loader-logo {
    width: 80px;
    height: 80px;
    margin: 0 auto 24px;
    animation: loaderPulse 2s ease-in-out infinite;
}

.loader-logo img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    filter: drop-shadow(0 0 20px var(--primary-glow));
}

.loader-text {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 32px;
    display: flex;
    justify-content: center;
    gap: 4px;
}

.loader-text span {
    display: inline-block;
    animation: loaderBounce 1.4s ease-in-out infinite;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.loader-text span:nth-child(1) {
    animation-delay: 0s;
}

.loader-text span:nth-child(2) {
    animation-delay: 0.1s;
}

.loader-text span:nth-child(3) {
    animation-delay: 0.2s;
}

.loader-text span:nth-child(4) {
    animation-delay: 0.3s;
}

.loader-progress {
    width: 200px;
    height: 3px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 2px;
    margin: 0 auto 24px;
    overflow: hidden;
}

.loader-bar {
    height: 100%;
    width: 0;
    background: var(--gradient-primary);
    border-radius: 2px;
    animation: loaderProgress 2s ease-in-out forwards;
}

.loader-tagline {
    font-size: 0.875rem;
    color: var(--text-muted);
    letter-spacing: 2px;
}

@keyframes loaderPulse {

    0%,
    100% {
        transform: scale(1);
        opacity: 1;
    }

    50% {
        transform: scale(1.1);
        opacity: 0.8;
    }
}

@keyframes loaderBounce {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-10px);
    }
}

@keyframes loaderProgress {
    0% {
        width: 0;
    }

    100% {
        width: 100%;
    }
}

/* ============================================
   🌟 Cursor Glow Effect
   ============================================ */
.cursor-glow {
    position: fixed;
    width: 400px;
    height: 400px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.15) 0%, transparent 70%);
    pointer-events: none;
    z-index: 9998;
    transform: translate(-50%, -50%);
    transition: opacity 0.3s ease;
    opacity: 0;
}

.cursor-glow.active {
    opacity: 1;
}

/* ============================================
   📊 Scroll Progress Bar
   ============================================ */
.scroll-progress-bar {
    position: fixed;
    top: 0;
    left: 0;
    height: 3px;
    background: var(--gradient-primary);
    z-index: 10000;
    transform-origin: left;
    transform: scaleX(0);
    box-shadow: 0 0 10px var(--primary-glow);
}

/* ============================================
   🎨 Background Orbs (Enhanced)
   ============================================ */
.bg-orb {
    position: fixed;
    border-radius: 50%;
    filter: blur(80px);
    pointer-events: none;
    z-index: -1;
    animation: orbFloat 20s ease-in-out infinite;
}

.bg-orb-1 {
    top: -20%;
    left: -10%;
    width: 60vw;
    height: 60vw;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.2) 0%, transparent 60%);
    animation-delay: 0s;
}

.bg-orb-2 {
    bottom: -30%;
    right: -15%;
    width: 50vw;
    height: 50vw;
    background: radial-gradient(circle, rgba(6, 182, 212, 0.15) 0%, transparent 60%);
    animation-delay: -7s;
}

.bg-orb-3 {
    top: 40%;
    right: -20%;
    width: 40vw;
    height: 40vw;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.12) 0%, transparent 60%);
    animation-delay: -14s;
}

@keyframes orbFloat {

    0%,
    100% {
        transform: translate(0, 0) scale(1);
    }

    33% {
        transform: translate(30px, -30px) scale(1.05);
    }

    66% {
        transform: translate(-20px, 20px) scale(0.95);
    }
}

/* Background Grid Pattern */
.bg-grid-pattern {
    position: fixed;
    inset: 0;
    background-image:
        linear-gradient(rgba(99, 102, 241, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(99, 102, 241, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    pointer-events: none;
    z-index: -1;
    mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 20%, transparent 70%);
}

/* ============================================
   🔮 Glass Card Effect (Premium)
   ============================================ */
.glass-card {
    background: var(--gradient-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    position: relative;
    overflow: hidden;
}

.glass-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: var(--gradient-shine);
    transition: left 0.5s ease;
}

.glass-card:hover::before {
    left: 100%;
}

/* ============================================
   🎯 3D Tilt Card Effect
   ============================================ */
.tilt-card {
    transform-style: preserve-3d;
    transition: transform 0.5s cubic-bezier(0.23, 1, 0.32, 1),
        box-shadow 0.5s ease;
}

.tilt-card:hover {
    box-shadow:
        0 25px 50px -12px rgba(0, 0, 0, 0.5),
        0 0 40px rgba(99, 102, 241, 0.2);
}

.tilt-card .tilt-inner {
    transform: translateZ(30px);
}

/* ============================================
   🧲 Magnetic Button Effect
   ============================================ */
.magnetic-btn {
    position: relative;
    transition: transform 0.3s cubic-bezier(0.23, 1, 0.32, 1);
}

/* ============================================
   💫 Pulse Button Effect
   ============================================ */
.pulse-btn {
    position: relative;
}

.pulse-btn::after {
    content: '';
    position: absolute;
    inset: -4px;
    border-radius: inherit;
    background: var(--gradient-primary);
    z-index: -1;
    opacity: 0;
    animation: pulseGlow 2s ease-in-out infinite;
}

@keyframes pulseGlow {

    0%,
    100% {
        opacity: 0;
        transform: scale(1);
    }

    50% {
        opacity: 0.5;
        transform: scale(1.05);
    }
}

/* ============================================
   ✨ Neon Glow Text
   ============================================ */
.neon-text {
    text-shadow:
        0 0 10px var(--primary-glow),
        0 0 20px var(--primary-glow),
        0 0 40px var(--primary-glow);
}

/* ============================================
   🔢 Counter Animation
   ============================================ */
.counter {
    display: inline-block;
    font-variant-numeric: tabular-nums;
}

/* ============================================
   🌊 Section Dividers (Wave/Diagonal)
   ============================================ */
.section-divider {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 80px;
    z-index: 3;
    pointer-events: none;
}

.section-divider svg {
    display: block;
    width: 100%;
    height: 100%;
}

.section-divider-top {
    top: 0;
    bottom: auto;
    transform: rotate(180deg);
}

/* ============================================
   🧭 Nav Active Indicator
   ============================================ */
.nav-link {
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    border-radius: 1px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    transform: translateX(-50%);
    box-shadow: 0 0 8px var(--primary-glow);
}

.nav-link.active::after {
    width: 100%;
}

.nav-link.active {
    color: var(--text-primary) !important;
}

/* ============================================
   🎨 Dimension Color Themes
   ============================================ */
.dimension-detail[id="dim-teach"] {
    border-left: 3px solid #6366f1;
}
.dimension-detail[id="dim-teach"]:hover {
    border-color: #6366f1;
    box-shadow: 0 0 30px rgba(99, 102, 241, 0.2);
}
.dimension-detail[id="dim-teach"] .detail-icon {
    background: rgba(99, 102, 241, 0.15);
}

.dimension-detail[id="dim-learn"] {
    border-left: 3px solid #06b6d4;
}
.dimension-detail[id="dim-learn"]:hover {
    border-color: #06b6d4;
    box-shadow: 0 0 30px rgba(6, 182, 212, 0.2);
}
.dimension-detail[id="dim-learn"] .detail-icon {
    background: rgba(6, 182, 212, 0.15);
}

.dimension-detail[id="dim-evaluate"] {
    border-left: 3px solid #f59e0b;
}
.dimension-detail[id="dim-evaluate"]:hover {
    border-color: #f59e0b;
    box-shadow: 0 0 30px rgba(245, 158, 11, 0.2);
}
.dimension-detail[id="dim-evaluate"] .detail-icon {
    background: rgba(245, 158, 11, 0.15);
}

.dimension-detail[id="dim-manage"] {
    border-left: 3px solid #10b981;
}
.dimension-detail[id="dim-manage"]:hover {
    border-color: #10b981;
    box-shadow: 0 0 30px rgba(16, 185, 129, 0.2);
}
.dimension-detail[id="dim-manage"] .detail-icon {
    background: rgba(16, 185, 129, 0.15);
}

.dimension-detail[id="dim-research"] {
    border-left: 3px solid #8b5cf6;
}
.dimension-detail[id="dim-research"]:hover {
    border-color: #8b5cf6;
    box-shadow: 0 0 30px rgba(139, 92, 246, 0.2);
}
.dimension-detail[id="dim-research"] .detail-icon {
    background: rgba(139, 92, 246, 0.15);
}

.dimension-detail[id="dim-nurture"] {
    border-left: 3px solid #ec4899;
}
.dimension-detail[id="dim-nurture"]:hover {
    border-color: #ec4899;
    box-shadow: 0 0 30px rgba(236, 72, 153, 0.2);
}
.dimension-detail[id="dim-nurture"] .detail-icon {
    background: rgba(236, 72, 153, 0.15);
}

/* ============================================
   📊 Detail Stat Enhancement
   ============================================ */
.detail-stat {
    margin-top: 24px;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    display: flex;
    align-items: baseline;
    gap: 12px;
}

.stat-big {
    font-size: 2.5rem;
    font-weight: 900;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    filter: drop-shadow(0 0 15px rgba(99, 102, 241, 0.4));
    line-height: 1;
}

.stat-desc {
    font-size: 0.95rem;
    color: var(--text-secondary);
    font-weight: 500;
}

/* ============================================
   📱 Platform Card List Styles
   ============================================ */
.platform-card ul {
    list-style: none;
    padding: 0;
    margin-top: 16px;
    text-align: left;
}

.platform-card ul li {
    position: relative;
    padding: 8px 0 8px 24px;
    color: var(--text-secondary);
    font-size: 0.9rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.platform-card ul li:last-child {
    border-bottom: none;
}

.platform-card ul li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--gradient-primary);
    box-shadow: 0 0 8px var(--primary-glow);
}

/* ============================================
   ✨ Section Decorative Elements
   ============================================ */
.section-decor {
    position: absolute;
    pointer-events: none;
    z-index: 1;
}

.decor-ring {
    width: 200px;
    height: 200px;
    border: 1px solid rgba(99, 102, 241, 0.1);
    border-radius: 50%;
    animation: decorRotate 30s linear infinite;
}

.decor-ring::before {
    content: '';
    position: absolute;
    top: -3px;
    left: 50%;
    width: 6px;
    height: 6px;
    background: var(--primary);
    border-radius: 50%;
    box-shadow: 0 0 12px var(--primary-glow);
}

.decor-dots {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 12px;
    opacity: 0.3;
}

.decor-dots span {
    width: 3px;
    height: 3px;
    background: var(--primary-light);
    border-radius: 50%;
}

.decor-line {
    width: 1px;
    height: 120px;
    background: linear-gradient(180deg, transparent, rgba(99, 102, 241, 0.3), transparent);
}

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

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

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

body {
    font-family: var(--font-family);
    background: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition-base);
}

ul {
    list-style: none;
}

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

/* ============================================
   Layout Utils
   ============================================ */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
    position: relative;
    z-index: 2;
}

/* 移动端容器优化 */
@media (max-width: 768px) {
    .container {
        padding: 0 20px;
        /* 移动端减少左右padding，增加内容区域 */
    }
}

.section {
    padding: var(--section-padding) 0;
    position: relative;
    overflow: hidden;
}

/* ============================================
   Navigation
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 20px 0;
    transition: all 0.4s ease;
}

.navbar.scrolled {
    padding: 12px 0;
    background: rgba(5, 5, 8, 0.9);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.nav-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-img {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    object-fit: contain;
}

.logo-text {
    font-size: 1.25rem;
    font-weight: 700;
    color: white;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 24px;
}

.nav-link {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.95rem;
    padding: 8px 0;
    position: relative;
}

.nav-link:hover {
    color: var(--text-primary);
}

.nav-cta {
    background: var(--primary);
    color: white !important;
    padding: 10px 24px;
    border-radius: var(--radius-full);
    box-shadow: 0 0 15px rgba(99, 102, 241, 0.3);
}

.nav-cta:hover {
    background: var(--primary-light);
    transform: translateY(-2px);
}

.nav-toggle {
    display: none;
    /* Mobile toggle */
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding-top: 80px;
    text-align: center;
}

#particles {
    position: absolute;
    inset: 0;
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 900px;
    padding: 0 24px;
    margin: 0 auto;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    background: rgba(99, 102, 241, 0.15);
    border: 1px solid rgba(99, 102, 241, 0.3);
    border-radius: var(--radius-full);
    color: var(--primary-light);
    margin-bottom: 32px;
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4.5rem);
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 24px;
}

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

.title-line {
    display: block;
    font-size: 0.4em;
    letter-spacing: 0.5em;
    color: var(--text-secondary);
    font-weight: 400;
    margin-bottom: 16px;
    text-transform: uppercase;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 48px;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 24px;
    margin-bottom: 60px;
    flex-wrap: wrap;
    /* 允许在小屏幕换行 */
    width: 100%;
    /* 确保占满容器宽度 */
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    /* 确保内容居中 */
    gap: 8px;
    padding: 14px 32px;
    border-radius: var(--radius-full);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-base);
    white-space: nowrap;
    /* 禁止文字换行 */
    flex-shrink: 0;
    /* 禁止被挤压 */
    width: auto;
    /* 自动宽度 */
    min-width: 140px;
    /* 设置最小宽度 */
    text-decoration: none;
    /* 去除下划线 */
}

.btn-primary {
    background: var(--primary);
    color: white;
    box-shadow: 0 0 20px rgba(99, 102, 241, 0.4);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: white;
}

.btn:hover {
    transform: translateY(-3px);
}

.hero-stats {
    display: flex;
    align-items: center;
    justify-content: space-around;
    gap: 20px;
    padding: 30px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: var(--radius-xl);
    border: 1px solid rgba(255, 255, 255, 0.05);
    flex-wrap: nowrap;
    /* 确保不换行 */
}

.stat-item {
    text-align: center;
    flex: 1;
    /* 平均分配宽度 */
    min-width: 0;
    /* 允许 flex 收缩 */
    white-space: nowrap;
    /* 防止整个项目换行 */
}

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: white;
    line-height: 1.2;
    margin-bottom: 5px;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-muted);
    white-space: nowrap;
    /* 防止标签文字换行 */
    display: block;
}

.stat-divider {
    width: 1px;
    height: 30px;
    background: rgba(255, 255, 255, 0.1);
}

/* Hero Scroll Indicator - 隐藏，改用更简洁的方式 */
.hero-scroll {
    display: none;
    /* 直接隐藏这个元素 */
}

.scroll-indicator {
    display: none;
}

/* ============================================
   Problems Section (学校面临的挑战)
   ============================================ */
.section-problem {
    background: linear-gradient(180deg, var(--bg-dark) 0%, rgba(20, 10, 30, 1) 100%);
}

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

.problem-card {
    padding: 32px;
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-lg);
    transition: var(--transition-base);
}

.problem-card:hover {
    transform: translateY(-8px);
    border-color: rgba(99, 102, 241, 0.3);
    box-shadow: 0 0 30px rgba(99, 102, 241, 0.15);
}

.problem-icon {
    font-size: 48px;
    margin-bottom: 16px;
    display: block;
}

.problem-card h3 {
    font-size: 1.25rem;
    margin-bottom: 12px;
}

.problem-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* ============================================
   Values Section (价值体现)
   ============================================ */
.section-values {
    background: linear-gradient(180deg, var(--bg-dark) 0%, var(--bg-darker) 100%);
}

.values-tabs {
    max-width: 1000px;
    margin: 0 auto;
}

.tabs-nav {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.tab-btn {
    padding: 12px 24px;
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-full);
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition-base);
}

.tab-btn:hover {
    background: var(--bg-card-hover);
    color: var(--text-primary);
}

.tab-btn.active {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
}

.tab-panel {
    display: none;
}

.tab-panel.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

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

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

.value-card {
    padding: 32px;
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-lg);
    text-align: center;
    transition: var(--transition-base);
}

.value-card:hover {
    transform: translateY(-8px);
    border-color: rgba(99, 102, 241, 0.3);
}

.value-icon {
    font-size: 48px;
    margin-bottom: 16px;
    display: block;
}

.value-card h4 {
    font-size: 1.25rem;
    margin-bottom: 12px;
}

.value-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* ============================================
   CTA Section (联系我们)
   ============================================ */
.section-cta {
    background: radial-gradient(ellipse at 50% 100%, rgba(99, 102, 241, 0.2) 0%, var(--bg-dark) 70%);
}

.cta-content {
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
    padding: 60px 40px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-xl);
    backdrop-filter: blur(10px);
}

.cta-content h2 {
    font-size: 2.5rem;
    margin-bottom: 16px;
}

.cta-content>p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 32px;
}

.cta-features {
    display: flex;
    justify-content: center;
    gap: 32px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.cta-feature {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
}

.cta-icon {
    color: var(--accent);
}

.cta-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.form-row {
    display: flex;
    gap: 16px;
}

.cta-form input {
    flex: 1;
    padding: 14px 20px;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    font-size: 1rem;
    color: white;
    transition: var(--transition-base);
}

.cta-form input::placeholder {
    color: var(--text-muted);
}

.cta-form input:focus {
    border-color: var(--primary);
    background: rgba(0, 0, 0, 0.5);
}

.cta-form .btn {
    width: 100%;
    justify-content: center;
}

.cta-contact {
    margin-top: 24px;
    color: var(--text-secondary);
}

.cta-contact a {
    color: var(--primary-light);
}

/* CTA Form Button Fix */
.cta-form .btn {
    width: 100%;
    padding: 16px 32px;
    font-size: 1.1rem;
}

/* Form Message */
.form-message {
    margin-top: 15px;
    padding: 12px 20px;
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    text-align: center;
    opacity: 0;
    transform: translateY(-10px);
    transition: all 0.3s ease;
}

.form-message.success {
    opacity: 1;
    transform: translateY(0);
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.3);
    color: #10b981;
}

.form-message.error {
    opacity: 1;
    transform: translateY(0);
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: #ef4444;
}

/* Loading Dots Animation */
.loading-dots {
    display: inline-flex;
    gap: 4px;
    align-items: center;
}

.loading-dots span {
    width: 6px;
    height: 6px;
    background: currentColor;
    border-radius: 50%;
    animation: loadingDot 1.4s ease-in-out infinite;
}

.loading-dots span:nth-child(2) {
    animation-delay: 0.2s;
}

.loading-dots span:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes loadingDot {

    0%,
    80%,
    100% {
        transform: scale(0.8);
        opacity: 0.5;
    }

    40% {
        transform: scale(1.2);
        opacity: 1;
    }
}

.btn-large {
    padding: 16px 40px;
}

.btn-arrow {
    width: 20px;
    height: 20px;
    stroke: currentColor;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
    fill: none;
}

/* ============================================
   Section Headers
   ============================================ */
.section-header {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 60px;
}

.section-tag {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(99, 102, 241, 0.2);
    border-radius: var(--radius-full);
    color: var(--primary-light);
    font-size: 0.875rem;
    margin-bottom: 16px;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.section-desc {
    font-size: 1.125rem;
    color: var(--text-secondary);
}

/* ============================================
   Dimensions (Flex Fix)
   ============================================ */
.section-dimensions {
    background: radial-gradient(circle at 50% 50%, rgba(99, 102, 241, 0.05) 0%, transparent 70%);
}

.dimensions-visual {
    position: relative;
    width: 400px;
    height: 400px;
    margin: 0 auto 80px;
}

.dimension-center {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 120px;
    height: 120px;
    background: radial-gradient(circle at 30% 30%, var(--primary-light), var(--primary));
    border-radius: 50%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 10;
    box-shadow: 0 0 50px rgba(99, 102, 241, 0.4);
}

.center-icon {
    font-size: 32px;
    margin-bottom: 4px;
}

.center-text {
    font-size: 12px;
    font-weight: 700;
}

.dimension-orbit {
    position: absolute;
    inset: -40px;
    /* Expand orbit */
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    animation: rotate 60s linear infinite;
}

.dimension-item {
    position: absolute;
    width: 80px;
    height: 80px;
    background: rgba(10, 10, 20, 0.9);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition-base);

    /* Orbit calculation */
    --angle: calc(var(--i) * 60deg - 90deg);
    top: calc(50% + 240px * sin(var(--angle)) - 40px);
    left: calc(50% + 240px * cos(var(--angle)) - 40px);
}

.dimension-item:hover {
    background: var(--primary);
    transform: scale(1.1);
    z-index: 20;
    box-shadow: 0 0 20px var(--primary-glow);
}

.dimensions-details {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
}

.dimension-detail {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-lg);
    padding: 32px;
    transition: var(--transition-base);
}

.dimension-detail:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(99, 102, 241, 0.3);
    transform: translateY(-5px);
}

.detail-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 24px;
}

.detail-icon {
    font-size: 32px;
    width: 60px;
    height: 60px;
    background: rgba(99, 102, 241, 0.1);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.detail-header h3 {
    font-size: 1.5rem;
    margin-bottom: 4px;
}

.detail-quote {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-style: italic;
}

.detail-list li {
    position: relative;
    padding-left: 24px;
    margin-bottom: 12px;
    color: var(--text-secondary);
}

.detail-list li::before {
    content: '•';
    color: var(--primary);
    position: absolute;
    left: 8px;
    font-size: 1.2em;
}

/* ============================================
   Platforms (Grid Fix)
   ============================================ */
.section-platforms {
    background: linear-gradient(180deg, var(--bg-darker) 0%, var(--bg-dark) 100%);
}

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

.platform-card {
    padding: 32px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    text-align: center;
    transition: var(--transition-base);
}

.platform-card:hover {
    transform: translateY(-8px);
    background: var(--bg-card-hover);
    border-color: var(--primary-light);
}

/* ============================================
   Dashboard - 管理者驾驶舱
   ============================================ */
.section-dashboard {
    background: linear-gradient(180deg, var(--bg-dark) 0%, var(--bg-darker) 50%, var(--bg-dark) 100%);
    position: relative;
    overflow: hidden;
}

.section-dashboard::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.06) 0%, transparent 70%);
    pointer-events: none;
}

.dashboard-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.dashboard-card {
    padding: 36px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    transition: var(--transition-base);
    position: relative;
    overflow: hidden;
}

.dashboard-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    opacity: 0;
    transition: opacity 0.3s ease;
}

.dashboard-card:hover {
    transform: translateY(-6px);
    background: var(--bg-card-hover);
    border-color: var(--primary-light);
}

.dashboard-card:hover::before {
    opacity: 1;
}

.dashboard-card-main {
    grid-column: 1 / -1;
    background: linear-gradient(145deg, rgba(99, 102, 241, 0.08), rgba(20, 20, 30, 0.95));
    border-color: rgba(99, 102, 241, 0.25);
}

.dashboard-card-main::before {
    opacity: 1;
    height: 4px;
}

.dashboard-card-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

.dashboard-icon-wrapper {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(99, 102, 241, 0.15);
    border-radius: 12px;
    font-size: 1.5rem;
}

.dashboard-tag {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--primary);
    background: rgba(99, 102, 241, 0.1);
    padding: 4px 12px;
    border-radius: 20px;
    border: 1px solid rgba(99, 102, 241, 0.2);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.dashboard-card h3 {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 10px;
}

.dashboard-desc {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 20px;
}

.dashboard-metrics {
    display: flex;
    gap: 24px;
    margin-top: 20px;
}

.metric-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    flex: 1;
    padding: 16px;
    background: rgba(99, 102, 241, 0.06);
    border-radius: 12px;
    border: 1px solid rgba(99, 102, 241, 0.1);
}

.metric-value {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary);
    margin-bottom: 4px;
}

.metric-label {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.dashboard-list {
    list-style: none;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.dashboard-list li {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.dashboard-list li::before {
    content: '✓';
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    background: rgba(16, 185, 129, 0.15);
    color: #10b981;
    border-radius: 50%;
    font-size: 0.7rem;
    font-weight: 700;
    flex-shrink: 0;
}

.dashboard-highlight {
    margin-top: 48px;
    text-align: center;
}

.highlight-quote {
    display: inline-flex;
    align-items: flex-start;
    gap: 16px;
    max-width: 800px;
    padding: 32px 40px;
    background: linear-gradient(145deg, rgba(99, 102, 241, 0.06), rgba(20, 20, 30, 0.6));
    border: 1px solid rgba(99, 102, 241, 0.15);
    border-radius: var(--radius-xl);
    position: relative;
}

.quote-mark {
    font-size: 3rem;
    color: var(--primary);
    font-family: Georgia, serif;
    line-height: 1;
    opacity: 0.6;
    flex-shrink: 0;
}

.highlight-quote p {
    color: var(--text-secondary);
    font-size: 1.05rem;
    line-height: 1.8;
    text-align: left;
}

.highlight-quote strong {
    color: var(--text-primary);
}

/* Dashboard - Responsive */
@media (max-width: 768px) {
    .dashboard-grid {
        grid-template-columns: 1fr;
    }

    .dashboard-card-main {
        grid-column: auto;
    }

    .dashboard-metrics {
        flex-direction: row;
        gap: 12px;
    }

    .metric-item {
        padding: 12px 8px;
    }

    .metric-value {
        font-size: 1.2rem;
    }

    .highlight-quote {
        padding: 24px;
        flex-direction: column;
        align-items: center;
    }

    .quote-mark:last-child {
        display: none;
    }
}

/* ============================================
   Features (Grid Fix)
   ============================================ */
/* ============================================
   Features Showcase - Premium Edition
   ============================================ */
.features-showcase {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 60px;
    align-items: start;
}

.feature-visual {
    position: relative;
    min-height: 500px;
}

.visual-card {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    background: linear-gradient(145deg, rgba(20, 20, 30, 0.95), rgba(10, 10, 15, 0.98));
    backdrop-filter: blur(20px);
    border: 1px solid rgba(99, 102, 241, 0.2);
    border-radius: var(--radius-xl);
    padding: 50px;
    min-height: 500px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(30px) scale(0.95);
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3), 0 0 40px rgba(99, 102, 241, 0.1);
}

.visual-card.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
    z-index: 10;
}

.visual-glow {
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.08) 0%, transparent 50%);
    opacity: 0;
    transition: opacity 0.5s ease;
    pointer-events: none;
    z-index: 0;
}

.visual-card.active .visual-glow {
    opacity: 0.4;
}

.visual-header {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-bottom: 40px;
    padding-bottom: 25px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.visual-icon-wrapper {
    width: 70px;
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.2), rgba(6, 182, 212, 0.2));
    border: 2px solid rgba(99, 102, 241, 0.3);
    border-radius: var(--radius-lg);
    font-size: 2rem;
    box-shadow: 0 0 20px rgba(99, 102, 241, 0.3);
}

.visual-title-group {
    flex: 1;
}

.visual-title-group h3 {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 8px;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.visual-tag {
    display: inline-block;
    padding: 4px 12px;
    background: rgba(99, 102, 241, 0.15);
    border: 1px solid rgba(99, 102, 241, 0.3);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    color: var(--primary-light);
    font-weight: 600;
}

.visual-content {
    margin-top: 30px;
}

/* Enhanced Comparison */
.comparison-enhanced {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    margin-bottom: 35px;
    padding: 30px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.comp-before,
.comp-after {
    flex: 1;
    text-align: center;
    padding: 25px 20px;
    border-radius: var(--radius-md);
    position: relative;
    overflow: hidden;
}

.comp-before {
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.1), rgba(239, 68, 68, 0.05));
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.comp-after {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.1), rgba(16, 185, 129, 0.05));
    border: 1px solid rgba(16, 185, 129, 0.2);
}

.comp-icon {
    font-size: 2rem;
    margin-bottom: 10px;
    display: block;
}

.comp-label {
    display: block;
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.comp-value {
    display: block;
    font-size: 2.2rem;
    font-weight: 800;
    margin: 10px 0;
    line-height: 1.2;
}

.comp-before .comp-value {
    color: #ef4444;
    text-shadow: 0 0 20px rgba(239, 68, 68, 0.5);
}

.comp-after .comp-value {
    color: #10b981;
    text-shadow: 0 0 20px rgba(16, 185, 129, 0.5);
}

.comp-desc {
    display: block;
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 5px;
}

.comp-arrow-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 5px;
}

.comp-arrow-line {
    width: 2px;
    height: 30px;
    background: linear-gradient(180deg, rgba(99, 102, 241, 0.5), rgba(6, 182, 212, 0.5));
}

.comp-arrow {
    font-size: 1.5rem;
    color: var(--primary-light);
    animation: arrowPulse 2s ease-in-out infinite;
}

@keyframes arrowPulse {

    0%,
    100% {
        transform: translateX(0);
        opacity: 1;
    }

    50% {
        transform: translateX(5px);
        opacity: 0.7;
    }
}

/* Feature Badges */
.visual-features {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 25px;
}

.feature-badge {
    padding: 10px 18px;
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(99, 102, 241, 0.2);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    color: var(--primary-light);
    font-weight: 500;
    transition: all 0.3s ease;
}

.feature-badge:hover {
    background: rgba(99, 102, 241, 0.2);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(99, 102, 241, 0.3);
}

/* Stats Grid (for AI学情分析) */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-bottom: 25px;
}

.stat-box {
    text-align: center;
    padding: 25px 15px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-md);
    transition: all 0.3s ease;
}

.stat-box:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(99, 102, 241, 0.3);
}

.stat-icon {
    font-size: 2.5rem;
    margin-bottom: 12px;
    display: block;
}

.stat-box h4 {
    font-size: 1rem;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.stat-box p {
    font-size: 0.8rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* Format Grid (for AI课件生成) */
.format-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-bottom: 25px;
}

.format-item {
    text-align: center;
    padding: 25px 15px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-md);
    transition: all 0.3s ease;
}

.format-item:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(99, 102, 241, 0.3);
}

.format-icon {
    font-size: 2.5rem;
    margin-bottom: 12px;
    display: block;
}

.format-item h4 {
    font-size: 1rem;
    color: var(--text-primary);
}

/* AI作业批改 - 新设计 */
.grading-comparison {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    margin-bottom: 30px;
    padding: 25px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.grading-before,
.grading-after {
    flex: 1;
    text-align: center;
    padding: 20px;
    border-radius: var(--radius-md);
    transition: all 0.3s ease;
}

.grading-before {
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.08), rgba(239, 68, 68, 0.03));
    border: 1px solid rgba(239, 68, 68, 0.15);
}

.grading-after {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.08), rgba(16, 185, 129, 0.03));
    border: 1px solid rgba(16, 185, 129, 0.15);
}

.grading-icon {
    font-size: 2.5rem;
    margin-bottom: 12px;
    display: block;
}

.grading-before h4,
.grading-after h4 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.grading-before h4 {
    color: #ef4444;
}

.grading-after h4 {
    color: #10b981;
}

.grading-list {
    list-style: none;
    padding: 0;
    margin: 0;
    text-align: left;
}

.grading-list li {
    padding: 8px 0;
    font-size: 0.9rem;
    color: var(--text-secondary);
    position: relative;
    padding-left: 20px;
}

.grading-list li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--text-muted);
}

.grading-arrow {
    font-size: 2rem;
    color: var(--primary-light);
    font-weight: 700;
    animation: arrowPulse 2s ease-in-out infinite;
}

/* 四维度卡片展示 */
.dimension-cards {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
    margin-bottom: 25px;
}

.dimension-card {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 18px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-md);
    transition: all 0.3s ease;
}

.dimension-card:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(99, 102, 241, 0.3);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(99, 102, 241, 0.2);
}

.dim-card-icon {
    font-size: 2rem;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(99, 102, 241, 0.1);
    border-radius: var(--radius-md);
    flex-shrink: 0;
}

.dim-card-content {
    flex: 1;
}

.dim-card-content h5 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 6px;
    color: var(--text-primary);
}

.dim-card-content p {
    font-size: 0.8rem;
    color: var(--text-secondary);
    line-height: 1.5;
    margin-bottom: 8px;
}

.dim-score {
    display: inline-block;
    padding: 4px 12px;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.2), rgba(6, 182, 212, 0.2));
    border: 1px solid rgba(99, 102, 241, 0.3);
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--primary-light);
}

/* 保留旧的dimension-grid样式（以防其他地方使用） */
.dimension-grid {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-bottom: 25px;
}

.dimension-item {
    display: flex;
    align-items: center;
    gap: 15px;
}

.dim-label {
    min-width: 50px;
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.dim-bar {
    flex: 1;
    height: 8px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.dim-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    border-radius: var(--radius-full);
    transition: width 1s ease;
    box-shadow: 0 0 10px rgba(99, 102, 241, 0.5);
}

/* Analysis Grid (for AI课堂分析) */
.analysis-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-bottom: 25px;
}

.analysis-item {
    text-align: center;
    padding: 25px 15px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-md);
    transition: all 0.3s ease;
}

.analysis-item:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(99, 102, 241, 0.3);
}

.analysis-icon {
    font-size: 2.5rem;
    margin-bottom: 12px;
    display: block;
}

.analysis-item h4 {
    font-size: 1rem;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.analysis-item p {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

/* Assistant Grid (for AI学习助手) */
.assistant-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-bottom: 25px;
}

.assistant-item {
    text-align: center;
    padding: 25px 15px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-md);
    transition: all 0.3s ease;
}

.assistant-item:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(99, 102, 241, 0.3);
}

.assistant-icon {
    font-size: 2.5rem;
    margin-bottom: 12px;
    display: block;
}

.assistant-item h4 {
    font-size: 1rem;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.assistant-item p {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

/* Custom Assistant Grid (for AI专属助手) */
.custom-assistant-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-bottom: 25px;
}

.custom-assistant-item {
    padding: 25px 20px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-md);
    transition: all 0.3s ease;
    text-align: center;
}

.custom-assistant-item:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(99, 102, 241, 0.3);
    box-shadow: 0 5px 20px rgba(99, 102, 241, 0.2);
}

.custom-icon {
    font-size: 2.5rem;
    margin-bottom: 15px;
    display: block;
}

.custom-assistant-item h4 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.custom-assistant-item p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Feature List - Enhanced */
.feature-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
    position: sticky;
    top: 100px;
}

.feature-item {
    position: relative;
    display: flex;
    align-items: center;
    gap: 18px;
    padding: 20px 24px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    overflow: hidden;
}

.feature-item-glow {
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(99, 102, 241, 0.2), transparent);
    transition: left 0.5s ease;
}

.feature-item:hover .feature-item-glow,
.feature-item.active .feature-item-glow {
    left: 100%;
}

.feature-item:hover {
    background: rgba(99, 102, 241, 0.08);
    border-color: rgba(99, 102, 241, 0.3);
    transform: translateX(8px);
    box-shadow: 0 5px 20px rgba(99, 102, 241, 0.2);
}

.feature-item.active {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.15), rgba(6, 182, 212, 0.1));
    border-color: rgba(99, 102, 241, 0.5);
    box-shadow: 0 0 30px rgba(99, 102, 241, 0.3), inset 0 0 20px rgba(99, 102, 241, 0.1);
    transform: translateX(8px);
}

.feature-icon {
    font-size: 2rem;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(99, 102, 241, 0.1);
    border-radius: var(--radius-md);
    flex-shrink: 0;
    transition: all 0.3s ease;
}

.feature-item.active .feature-icon {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.3), rgba(6, 182, 212, 0.2));
    transform: scale(1.1);
    box-shadow: 0 0 20px rgba(99, 102, 241, 0.5);
}

.feature-info {
    flex: 1;
}

.feature-info h4 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 6px;
    color: var(--text-primary);
    transition: color 0.3s ease;
}

.feature-item.active .feature-info h4 {
    color: var(--primary-light);
    text-shadow: 0 0 10px rgba(99, 102, 241, 0.5);
}

.feature-info p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.4;
}

.feature-arrow {
    font-size: 1.2rem;
    color: var(--text-muted);
    opacity: 0;
    transform: translateX(-10px);
    transition: all 0.3s ease;
}

.feature-item:hover .feature-arrow,
.feature-item.active .feature-arrow {
    opacity: 1;
    transform: translateX(0);
    color: var(--primary-light);
}

/* ============================================
   Custom Service (Grid Fix)
   ============================================ */
.section-service {
    background: #080810;
}

.service-highlight {
    margin-bottom: 48px;
}

.highlight-main {
    text-align: center;
    padding: 60px 40px;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(6, 182, 212, 0.05));
    border: 1px solid rgba(99, 102, 241, 0.2);
    border-radius: var(--radius-xl);
    position: relative;
    overflow: hidden;
}

.highlight-main h3 {
    font-size: 2rem;
    margin-bottom: 16px;
}

.service-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-bottom: 48px;
}

.service-card {
    padding: 32px 24px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-lg);
    text-align: center;
    transition: var(--transition-base);
}

.service-card:hover {
    transform: translateY(-8px);
    border-color: var(--primary);
    background: rgba(255, 255, 255, 0.05);
}

.service-icon {
    font-size: 40px;
    margin-bottom: 20px;
    display: block;
}

/* Service Process */
.service-process {
    padding: 40px;
    background: rgba(255, 255, 255, 0.02);
    border-radius: var(--radius-xl);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.service-process h4 {
    text-align: center;
    font-size: 1.5rem;
    margin-bottom: 40px;
}

.process-steps {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 20px;
    flex-wrap: wrap;
}

.process-step {
    flex: 1;
    min-width: 140px;
    text-align: center;
    padding: 20px;
    background: rgba(99, 102, 241, 0.05);
    border-radius: var(--radius-md);
    border: 1px solid rgba(99, 102, 241, 0.1);
}

.step-num {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 8px;
}

.process-arrow {
    color: var(--text-muted);
    font-size: 1.2rem;
}

/* ============================================
   About & Footer
   ============================================ */
.about-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 60px;
}

.about-text p {
    margin-bottom: 16px;
    color: var(--text-secondary);
}

.about-vision {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.vision-card {
    padding: 30px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
}

/* ============================================
   Premium Footer
   ============================================ */
.footer {
    background: #020203;
    padding: 0 0 24px;
    position: relative;
    overflow: hidden;
}

.footer-glow-line {
    height: 2px;
    background: linear-gradient(90deg, 
        transparent 0%, 
        rgba(99, 102, 241, 0.6) 20%, 
        rgba(6, 182, 212, 0.8) 50%, 
        rgba(99, 102, 241, 0.6) 80%, 
        transparent 100%);
    box-shadow: 0 0 20px rgba(99, 102, 241, 0.4), 0 0 40px rgba(6, 182, 212, 0.2);
}

/* Footer 上半部品牌区 */
.footer-hero {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 48px 0 40px;
}

.footer-brand-area {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer .footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.footer .footer-logo .logo-img {
    width: 42px;
    height: 42px;
    border-radius: 10px;
    filter: drop-shadow(0 0 8px rgba(99, 102, 241, 0.4));
}

.footer .footer-logo .logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, #fff 0%, rgba(99, 102, 241, 0.9) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 2px;
}

.footer-slogan {
    color: var(--text-secondary);
    font-size: 0.95rem;
    letter-spacing: 3px;
    padding-left: 2px;
}

.footer-cta-mini .footer-cta-btn {
    display: inline-block;
    padding: 12px 32px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.95rem;
    letter-spacing: 1px;
    transition: all 0.3s ease;
    text-decoration: none;
    box-shadow: 0 4px 20px rgba(99, 102, 241, 0.3);
}

.footer-cta-mini .footer-cta-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(99, 102, 241, 0.5);
}

/* 分割线 */
.footer-divider {
    height: 1px;
    background: linear-gradient(90deg, 
        transparent 0%, 
        rgba(255, 255, 255, 0.08) 20%, 
        rgba(255, 255, 255, 0.08) 80%, 
        transparent 100%);
}

/* 中间四列区 */
.footer-grid {
    display: grid;
    grid-template-columns: 1.8fr 1fr 1fr 1.2fr;
    gap: 48px;
    padding: 48px 0;
}

.footer-col h4 {
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 12px;
}

.footer-col h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 24px;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    border-radius: 2px;
}

.footer-about-text {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.8;
    opacity: 0.8;
}

.footer-col ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-col ul li {
    margin-bottom: 12px;
}

.footer-col ul li a {
    color: var(--text-secondary);
    font-size: 0.9rem;
    transition: all 0.3s ease;
    text-decoration: none;
    position: relative;
    padding-left: 0;
}

.footer-col ul li a::before {
    content: '';
    display: inline-block;
    width: 0;
    height: 1px;
    background: var(--primary-light);
    vertical-align: middle;
    margin-right: 0;
    transition: all 0.3s ease;
}

.footer-col ul li a:hover {
    color: var(--primary-light);
    padding-left: 12px;
}

.footer-col ul li a:hover::before {
    width: 8px;
    margin-right: 4px;
}

/* 联系方式列表 */
.footer-contact-list li {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 14px;
}

.footer-contact-list li svg {
    color: var(--primary-light);
    opacity: 0.7;
    flex-shrink: 0;
}

.footer-contact-list li a {
    padding-left: 0 !important;
}

.footer-contact-list li a::before {
    display: none !important;
}

.footer-contact-list li a:hover {
    padding-left: 0 !important;
}

/* 底部版权 */
.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 24px;
}

.footer-copyright {
    color: var(--text-muted);
    font-size: 0.85rem;
    opacity: 0.6;
}

.footer-icp {
    color: var(--text-muted);
    font-size: 0.85rem;
    opacity: 0.6;
    text-decoration: none;
    transition: all 0.3s ease;
}

.footer-icp:hover {
    color: var(--primary-light);
    opacity: 1;
}

/* ============================================
   Animations
   ============================================ */
@keyframes rotate {
    from {
        transform: rotate(0deg);
    }

    to {
        transform: rotate(360deg);
    }
}

@keyframes pulse {

    0%,
    100% {
        transform: translate(-50%, -50%) scale(1);
        box-shadow: 0 0 50px rgba(99, 102, 241, 0.4);
    }

    50% {
        transform: translate(-50%, -50%) scale(1.1);
        box-shadow: 0 0 80px rgba(99, 102, 241, 0.6);
    }
}

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 1024px) {

    .platforms-grid,
    .service-grid,
    .problems-grid,
    .value-cards {
        grid-template-columns: repeat(2, 1fr);
    }

    .features-showcase,
    .about-content {
        grid-template-columns: 1fr;
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 36px;
    }

    .dimensions-details {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {

    /* 基础字体优化 */
    html {
        font-size: 16px;
        /* 确保基础字体大小 */
    }

    body {
        font-size: 1rem;
        /* 移动端基础字体 */
        line-height: 1.7;
        /* 增加行高，提升可读性 */
    }

    /* Hero区域优化 */
    .hero {
        min-height: auto;
        padding: 100px 0 60px;
    }

    .hero-title {
        font-size: 2rem;
        /* 移动端标题 */
        line-height: 1.3;
        margin-bottom: 20px;
    }

    .hero-subtitle {
        font-size: 1.1rem;
        /* 移动端副标题 */
        margin-bottom: 32px;
        line-height: 1.8;
    }

    .hero-buttons {
        flex-direction: column;
        gap: 16px;
        width: 100%;
    }

    .btn {
        width: 100%;
        /* 移动端按钮全宽 */
        padding: 16px 24px;
        /* 增大按钮padding，确保至少44px高度 */
        font-size: 1rem;
        /* 按钮字体 */
        min-height: 48px;
        /* 确保触摸目标足够大 */
        justify-content: center;
    }

    .hero-stats {
        flex-direction: column;
        gap: 20px;
        padding: 24px 20px;
    }

    .stat-number {
        font-size: 2.2rem;
        /* 移动端统计数字 */
    }

    .stat-label {
        font-size: 0.95rem;
    }

    .stat-divider {
        display: none;
    }

    /* 章节标题优化 */
    .section-title {
        font-size: 1.8rem;
        /* 移动端章节标题 */
        line-height: 1.3;
        margin-bottom: 16px;
    }

    .section-desc {
        font-size: 1rem;
        /* 移动端描述文字 */
        line-height: 1.7;
    }

    /* 卡片和网格优化 */
    .service-grid,
    .problems-grid,
    .value-cards {
        grid-template-columns: 1fr;
        gap: 20px;
        /* 增加卡片间距 */
    }

    .problem-card,
    .value-card,
    .service-card {
        padding: 24px 20px;
        /* 增加卡片内边距 */
    }

    .problem-card h3,
    .value-card h4 {
        font-size: 1.2rem;
        /* 卡片标题 */
        margin-bottom: 12px;
    }

    .problem-card p,
    .value-card p {
        font-size: 0.95rem;
        /* 卡片内容 */
        line-height: 1.7;
    }

    /* 流程步骤 */
    .process-steps {
        flex-direction: column;
        gap: 24px;
    }

    .process-arrow {
        transform: rotate(90deg);
    }

    /* 表单优化 */
    .form-row {
        flex-direction: column;
        gap: 16px;
    }

    .cta-form input {
        padding: 16px 20px;
        /* 增大输入框padding */
        font-size: 1rem;
        /* 输入框字体 */
        min-height: 48px;
        /* 确保触摸目标足够大 */
    }

    .cta-form .btn {
        width: 100%;
        padding: 18px 32px;
        font-size: 1.1rem;
        min-height: 52px;
    }

    /* Tab按钮优化 */
    .tabs-nav {
        gap: 8px;
        flex-wrap: wrap;
        /* 允许换行 */
    }

    .tab-btn {
        padding: 14px 18px;
        /* 增大按钮 */
        font-size: 0.95rem;
        min-height: 48px;
        /* 确保触摸目标 */
        flex: 1;
        min-width: calc(50% - 4px);
        /* 两列布局 */
    }

    /* 其他优化 */
    .cta-features {
        flex-direction: column;
        gap: 16px;
    }

    .dimensions-visual {
        transform: scale(0.8);
        margin: 0 -20px 40px;
    }

    /* 性能优化：减少动画 */
    .loading-screen {
        display: none !important;
    }

    .cursor-glow {
        display: none !important;
    }

    /* 减少不必要的动画效果（排除关键动画） */
    *:not(.dimension-orbit):not(.bg-orb):not(.pulse-btn) {
        animation-duration: 0.3s !important;
        /* 缩短动画时间，但排除旋转和脉冲动画 */
    }

    /* 六维一体旋转动画保持正常速度 */
    .dimension-orbit {
        animation: rotate 60s linear infinite !important;
        /* 保持60秒一圈 */
    }

    /* FAQ优化 */
    .faq-question {
        padding: 18px 20px;
        font-size: 1.05rem;
        /* 增大FAQ问题字体 */
    }

    .faq-answer p {
        font-size: 0.95rem;
        line-height: 1.8;
        padding: 0 20px 18px;
    }

    /* 导航栏优化 */
    .navbar {
        padding: 16px 0;
    }

    .nav-logo .logo-text {
        font-size: 1.1rem;
    }

    .nav-toggle {
        width: 44px;
        /* 确保触摸目标 */
        height: 44px;
        padding: 12px;
    }

    /* 滚动优化 */
    html {
        -webkit-overflow-scrolling: touch;
        /* iOS平滑滚动 */
    }

    /* 触摸反馈优化 */
    .btn,
    .feature-item,
    .tab-btn,
    .faq-question {
        -webkit-tap-highlight-color: rgba(99, 102, 241, 0.2);
        /* 触摸高亮 */
        touch-action: manipulation;
        /* 优化触摸响应 */
    }

    /* 图片优化 */
    img {
        max-width: 100%;
        height: auto;
    }

    /* 文本选择优化 */
    * {
        -webkit-touch-callout: default;
        -webkit-user-select: text;
        user-select: text;
    }

    /* 禁用不必要的hover效果 */
    .btn:hover,
    .feature-item:hover {
        transform: none;
        /* 移动端禁用hover变换 */
    }

    /* 优化视觉卡片 */
    .visual-card {
        box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
        /* 移动端简化阴影 */
    }

    /* 优化统计数字显示 */
    .hero-stats .stat-item {
        padding: 12px 0;
    }

    /* 优化对比卡片 */
    .comparison-enhanced {
        padding: 24px 16px;
    }

    .comp-before,
    .comp-after {
        padding: 20px 16px;
    }

    .comp-value {
        font-size: 1.8rem;
        /* 移动端对比数值 */
    }

    /* 优化维度卡片 */
    .dimension-card {
        padding: 20px 16px;
    }

    .dim-card-content h5 {
        font-size: 1.05rem;
    }

    .dim-card-content p {
        font-size: 0.85rem;
    }

    .dim-score {
        font-size: 0.9rem;
        padding: 6px 14px;
    }

    /* 优化功能标签 */
    .feature-badge {
        padding: 10px 16px;
        font-size: 0.9rem;
    }

    /* 优化页脚 */
    .footer-hero {
        flex-direction: column;
        gap: 24px;
        text-align: center;
        padding: 36px 0 32px;
    }

    .footer-brand-area {
        align-items: center;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
        padding: 32px 0;
    }

    .footer-col h4::after {
        left: 50%;
        transform: translateX(-50%);
    }

    .footer-col-about,
    .footer-col {
        text-align: center;
    }

    .footer-contact-list li {
        justify-content: center;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 8px;
        text-align: center;
    }

    /* 优化返回顶部按钮位置 */
    .back-to-top {
        bottom: 100px;
        /* 避免与浮动联系按钮重叠 */
    }

    /* 优化浮动联系按钮 */
    .floating-contact {
        bottom: 24px;
        right: 20px;
    }

    .contact-trigger {
        width: 56px;
        height: 56px;
        font-size: 1.5rem;
    }

    /* 优化联系面板 */
    .contact-bubble {
        width: calc(100vw - 40px);
        max-width: 280px;
        right: 20px;
        bottom: 80px;
    }

    /* 优化加载性能：减少背景效果 */
    .bg-orb {
        opacity: 0.3;
        /* 移动端降低背景效果强度 */
    }

    .bg-grid-pattern {
        opacity: 0.2;
    }

    /* 优化AOS动画 */
    [data-aos] {
        transition-duration: 0.4s !important;
        /* 缩短动画时间 */
    }
}

/* ============================================
   ✨ Premium Enhancements
   ============================================ */

/* Enhanced Stat Numbers with Glow */
.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 800;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: none;
    filter: drop-shadow(0 0 10px rgba(99, 102, 241, 0.3));
}

/* Enhanced Hero Title */
.hero-title {
    text-shadow: 0 0 80px rgba(99, 102, 241, 0.3);
}

.hero-title .highlight {
    position: relative;
    display: inline-block;
}

.hero-title .highlight::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--gradient-primary);
    border-radius: 2px;
    box-shadow: 0 0 20px var(--primary-glow);
}

/* Enhanced Section Tags */
.section-tag {
    position: relative;
    overflow: hidden;
}

.section-tag::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    animation: tagShine 3s infinite;
}

@keyframes tagShine {
    0% {
        left: -100%;
    }

    50%,
    100% {
        left: 100%;
    }
}

/* Enhanced Buttons */
.btn-primary {
    position: relative;
    background: var(--gradient-primary);
    border: none;
    overflow: hidden;
    box-shadow:
        0 4px 15px rgba(99, 102, 241, 0.4),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.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: left 0.5s ease;
}

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

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow:
        0 8px 25px rgba(99, 102, 241, 0.5),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

/* Enhanced Nav CTA */
.nav-cta {
    position: relative;
    overflow: hidden;
}

.nav-cta::before {
    content: '';
    position: absolute;
    inset: -2px;
    background: var(--gradient-primary);
    border-radius: inherit;
    z-index: -1;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.nav-cta:hover::before {
    opacity: 1;
    animation: borderGlow 2s ease-in-out infinite;
}

@keyframes borderGlow {

    0%,
    100% {
        filter: blur(4px);
    }

    50% {
        filter: blur(8px);
    }
}

/* Enhanced Glass Cards */
.glass-card {
    background: linear-gradient(145deg,
            rgba(255, 255, 255, 0.08) 0%,
            rgba(255, 255, 255, 0.02) 50%,
            rgba(99, 102, 241, 0.05) 100%);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.glass-card:hover {
    border-color: rgba(99, 102, 241, 0.3);
    background: linear-gradient(145deg,
            rgba(255, 255, 255, 0.1) 0%,
            rgba(255, 255, 255, 0.03) 50%,
            rgba(99, 102, 241, 0.08) 100%);
}

/* Enhanced Dimension Center */
.dimension-center {
    box-shadow:
        0 0 60px rgba(99, 102, 241, 0.5),
        0 0 120px rgba(99, 102, 241, 0.3),
        inset 0 0 30px rgba(255, 255, 255, 0.1);
    animation: centerPulse 3s ease-in-out infinite;
}

@keyframes centerPulse {

    0%,
    100% {
        box-shadow:
            0 0 60px rgba(99, 102, 241, 0.5),
            0 0 120px rgba(99, 102, 241, 0.3),
            inset 0 0 30px rgba(255, 255, 255, 0.1);
    }

    50% {
        box-shadow:
            0 0 80px rgba(99, 102, 241, 0.6),
            0 0 150px rgba(99, 102, 241, 0.4),
            inset 0 0 40px rgba(255, 255, 255, 0.15);
    }
}

/* Enhanced Feature Items */
.feature-item {
    position: relative;
}

.feature-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 0;
    background: var(--gradient-primary);
    border-radius: 2px;
    transition: height 0.3s ease;
}

.feature-item:hover::before,
.feature-item.active::before {
    height: 60%;
}

/* Enhanced CTA Section */
.section-cta {
    position: relative;
}

.section-cta::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80%;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(99, 102, 241, 0.5), transparent);
}

.cta-content {
    position: relative;
    background: linear-gradient(145deg,
            rgba(99, 102, 241, 0.1) 0%,
            rgba(15, 15, 25, 0.9) 50%,
            rgba(6, 182, 212, 0.05) 100%);
}

/* Enhanced Footer - background glow */
.footer::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.03) 0%, transparent 70%);
    pointer-events: none;
    z-index: 0;
}

.footer .container {
    position: relative;
    z-index: 1;
}

/* Loading Dots Animation */
.loading-dots {
    display: inline-flex;
    gap: 4px;
}

.loading-dots span {
    width: 6px;
    height: 6px;
    background: white;
    border-radius: 50%;
    animation: loadingDot 1.4s ease-in-out infinite;
}

.loading-dots span:nth-child(1) {
    animation-delay: 0s;
}

.loading-dots span:nth-child(2) {
    animation-delay: 0.2s;
}

.loading-dots span:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes loadingDot {

    0%,
    80%,
    100% {
        transform: scale(0.6);
        opacity: 0.5;
    }

    40% {
        transform: scale(1);
        opacity: 1;
    }
}

/* Smooth Page Transitions */
.hero-badge,
.hero-title,
.hero-subtitle,
.hero-buttons,
.hero-stats {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

/* Print Styles */
@media print {

    .loading-screen,
    .cursor-glow,
    .scroll-progress-bar,
    .bg-orb,
    .bg-grid-pattern {
        display: none !important;
    }
}

/* ============================================
   🔝 Back to Top Button
   ============================================ */
.back-to-top {
    position: fixed;
    bottom: 100px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all 0.3s ease;
    z-index: 999;
    box-shadow: 0 4px 20px rgba(99, 102, 241, 0.4);
}

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

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(99, 102, 241, 0.5);
}

.back-to-top svg {
    width: 24px;
    height: 24px;
    color: white;
}

/* ============================================
   💬 Floating Contact Button
   ============================================ */
.floating-contact {
    position: fixed;
    bottom: 30px;
    right: 30px;
    z-index: 998;
}

.contact-trigger {
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    box-shadow: 0 4px 20px rgba(99, 102, 241, 0.4);
    transition: all 0.3s ease;
}

.contact-trigger:hover {
    transform: scale(1.1);
}

.trigger-icon {
    font-size: 24px;
    z-index: 2;
}

.trigger-pulse {
    position: absolute;
    inset: -8px;
    border-radius: 50%;
    background: var(--primary);
    opacity: 0;
    animation: triggerPulse 2s ease-out infinite;
}

@keyframes triggerPulse {
    0% {
        transform: scale(0.8);
        opacity: 0.5;
    }

    100% {
        transform: scale(1.4);
        opacity: 0;
    }
}

.contact-bubble {
    position: absolute;
    bottom: 75px;
    right: 0;
    width: 280px;
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    padding: 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px) scale(0.95);
    transition: all 0.3s ease;
    overflow: hidden;
}

.contact-bubble.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
}

.bubble-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    background: rgba(99, 102, 241, 0.1);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.bubble-header span {
    font-weight: 600;
}

.bubble-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 24px;
    cursor: pointer;
    line-height: 1;
    padding: 0;
    width: 24px;
    height: 24px;
}

.bubble-close:hover {
    color: white;
}

.bubble-content {
    padding: 20px;
}

.bubble-content p {
    color: var(--text-secondary);
    margin-bottom: 16px;
    font-size: 0.9rem;
}

.bubble-btn {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    border-radius: var(--radius-md);
    margin-bottom: 10px;
    transition: all 0.2s ease;
    font-weight: 500;
}

.bubble-btn:last-child {
    margin-bottom: 0;
}

.bubble-phone {
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.3);
    color: #10b981;
}

.bubble-phone:hover {
    background: rgba(16, 185, 129, 0.2);
}

.bubble-form {
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(99, 102, 241, 0.3);
    color: var(--primary-light);
}

.bubble-form:hover {
    background: rgba(99, 102, 241, 0.2);
}

/* ============================================
   ⌨️ Typewriter Effect
   ============================================ */
.typewriter {
    display: inline;
}

.typewriter::after {
    content: '|';
    animation: blink 1s infinite;
    color: var(--primary);
}

@keyframes blink {

    0%,
    50% {
        opacity: 1;
    }

    51%,
    100% {
        opacity: 0;
    }
}

/* ============================================
   🏆 Clients Section
   ============================================ */
.section-clients {
    background: linear-gradient(180deg, var(--bg-dark) 0%, rgba(10, 10, 20, 1) 100%);
}

.clients-stats {
    display: flex;
    justify-content: center;
    gap: 80px;
    margin-bottom: 60px;
    flex-wrap: wrap;
}

.client-stat {
    text-align: center;
}

.client-stat-number {
    font-size: 3.5rem;
    font-weight: 800;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
}

.client-stat-suffix {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-light);
}

.client-stat-label {
    display: block;
    margin-top: 8px;
    color: var(--text-secondary);
    font-size: 1rem;
}

.clients-logos {
    overflow: hidden;
    margin: 40px -24px;
    padding: 20px 0;
    mask-image: linear-gradient(90deg, transparent, black 10%, black 90%, transparent);
}

.logo-track {
    display: flex;
    gap: 40px;
    animation: logoScroll 30s linear infinite;
}

.logo-item {
    flex-shrink: 0;
    padding: 16px 32px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-md);
    font-size: 1.1rem;
    color: var(--text-secondary);
    white-space: nowrap;
    transition: all 0.3s ease;
}

.logo-item:hover {
    background: rgba(99, 102, 241, 0.1);
    border-color: rgba(99, 102, 241, 0.3);
    color: white;
}

@keyframes logoScroll {
    0% {
        transform: translateX(0);
    }

    100% {
        transform: translateX(-50%);
    }
}

.testimonial {
    max-width: 800px;
    margin: 60px auto 0;
}

.testimonial-content {
    padding: 40px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-xl);
    position: relative;
}

.testimonial-content::before {
    content: '"';
    position: absolute;
    top: 20px;
    left: 30px;
    font-size: 6rem;
    color: var(--primary);
    opacity: 0.2;
    font-family: Georgia, serif;
    line-height: 1;
}

.testimonial-content blockquote {
    font-size: 1.2rem;
    line-height: 1.8;
    color: var(--text-secondary);
    font-style: italic;
    margin-bottom: 24px;
    position: relative;
    z-index: 1;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 16px;
}

.author-avatar {
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
}

.author-info strong {
    display: block;
    margin-bottom: 4px;
}

.author-info span {
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* ============================================
   ❓ FAQ Section
   ============================================ */
.section-faq {
    background: var(--bg-darker);
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-category {
    margin: 40px 0 20px 0;
    padding-bottom: 15px;
    border-bottom: 2px solid rgba(99, 102, 241, 0.3);
}

.faq-category:first-child {
    margin-top: 0;
}

.faq-category-title {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--primary-light);
    margin: 0;
    display: flex;
    align-items: center;
    gap: 10px;
}

.faq-item {
    margin-bottom: 16px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: rgba(255, 255, 255, 0.02);
    transition: all 0.3s ease;
}

.faq-item:hover {
    border-color: rgba(99, 102, 241, 0.3);
}

.faq-item.active {
    border-color: var(--primary);
    background: rgba(99, 102, 241, 0.05);
}

.faq-question {
    width: 100%;
    padding: 20px 24px;
    background: none;
    border: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    text-align: left;
    color: white;
    font-size: 1.1rem;
    font-weight: 500;
    transition: all 0.3s ease;
}

.faq-question:hover {
    color: var(--primary-light);
}

.faq-icon {
    font-size: 1.5rem;
    color: var(--primary);
    transition: transform 0.3s ease;
    font-weight: 300;
}

.faq-item.active .faq-icon {
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.4s ease;
}

.faq-item.active .faq-answer {
    max-height: 600px;
    /* 增加最大高度以容纳更长的答案 */
}

.faq-answer p {
    padding: 0 24px 20px;
    color: var(--text-secondary);
    line-height: 1.8;
}

/* ============================================
   📱 Mobile Menu Enhancement
   ============================================ */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 10px;
    z-index: 1001;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: white;
    transition: all 0.3s ease;
}

.nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 320px;
        height: 100vh;
        background: rgba(5, 5, 10, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 100px 30px 40px;
        transition: right 0.4s ease;
        border-left: 1px solid rgba(255, 255, 255, 0.1);
        display: flex !important;
        z-index: 1000;
    }

    .nav-menu.active {
        right: 0;
    }

    .nav-menu li {
        margin: 0;
        opacity: 0;
        transform: translateX(20px);
        transition: all 0.3s ease;
    }

    .nav-menu.active li {
        opacity: 1;
        transform: translateX(0);
    }

    .nav-menu.active li:nth-child(1) {
        transition-delay: 0.1s;
    }

    .nav-menu.active li:nth-child(2) {
        transition-delay: 0.15s;
    }

    .nav-menu.active li:nth-child(3) {
        transition-delay: 0.2s;
    }

    .nav-menu.active li:nth-child(4) {
        transition-delay: 0.25s;
    }

    .nav-menu.active li:nth-child(5) {
        transition-delay: 0.3s;
    }

    .nav-menu.active li:nth-child(6) {
        transition-delay: 0.35s;
    }

    .nav-link {
        display: block;
        padding: 16px 0;
        font-size: 1.2rem;
        border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    }

    .nav-cta {
        margin-top: 20px;
        text-align: center;
        border-radius: var(--radius-md);
    }

    .clients-stats {
        gap: 40px;
    }

    .client-stat-number {
        font-size: 2.5rem;
    }

    .testimonial-content {
        padding: 24px;
    }

    .testimonial-content blockquote {
        font-size: 1rem;
    }

    .back-to-top {
        bottom: 90px;
        right: 20px;
        width: 44px;
        height: 44px;
    }

    .floating-contact {
        bottom: 20px;
        right: 20px;
    }

    .contact-trigger {
        width: 54px;
        height: 54px;
    }

    .contact-bubble {
        right: -10px;
        width: 260px;
    }

    /* Features Showcase - Mobile */
    .features-showcase {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .feature-main {
        order: 2;
        /* 详情展示放在下面 */
    }

    .feature-list {
        order: 1;
        /* 功能列表放在上面 */
        position: static;
        margin-bottom: 0;
    }

    .feature-visual {
        min-height: auto;
        position: relative;
        height: auto;
    }

    .visual-card {
        position: relative !important;
        padding: 30px 20px;
        min-height: auto;
        opacity: 1 !important;
        visibility: visible !important;
        transform: none !important;
        display: none !important;
        /* 手机端默认隐藏所有详情卡片 */
    }

    .visual-card:not(.active) {
        display: none !important;
    }

    /* 手机端隐藏详情展示区域 */
    .feature-main {
        display: none !important;
        /* 完全隐藏详情展示区域 */
    }

    .visual-header {
        flex-direction: column;
        text-align: center;
        gap: 15px;
    }

    .visual-icon-wrapper {
        width: 60px;
        height: 60px;
        font-size: 1.5rem;
    }

    .visual-title-group h3 {
        font-size: 1.5rem;
    }

    .comparison-enhanced {
        flex-direction: column;
        gap: 15px;
        padding: 20px;
    }

    .comp-arrow-wrapper {
        transform: rotate(90deg);
    }

    .comp-arrow-line {
        height: 2px;
        width: 30px;
    }

    .stats-grid,
    .format-grid,
    .analysis-grid,
    .assistant-grid,
    .custom-assistant-grid {
        grid-template-columns: 1fr;
        gap: 15px;
    }

    .custom-assistant-item {
        padding: 20px 15px;
    }

    .custom-icon {
        font-size: 2rem;
        margin-bottom: 12px;
    }

    .custom-assistant-item h4 {
        font-size: 1rem;
    }

    .custom-assistant-item p {
        font-size: 0.8rem;
    }

    .feature-list {
        position: static;
    }

    .feature-item {
        padding: 18px 20px;
        /* 增大触摸区域 */
        min-height: 64px;
        /* 确保足够大的触摸目标 */
    }

    .feature-item:hover,
    .feature-item.active {
        transform: translateX(0);
    }

    .feature-icon {
        width: 50px;
        /* 增大图标 */
        height: 50px;
        font-size: 1.8rem;
    }

    .feature-info h4 {
        font-size: 1.1rem;
        /* 增大标题 */
        margin-bottom: 6px;
    }

    .feature-info p {
        font-size: 0.9rem;
        /* 增大描述文字 */
        line-height: 1.6;
    }

    /* Section间距优化 */
    .section {
        padding: 60px 0;
        /* 移动端减少section间距 */
    }

    .section-header {
        margin-bottom: 32px;
    }

    /* 平台卡片优化 */
    .platform-card {
        padding: 28px 20px;
    }

    .platform-card h3 {
        font-size: 1.3rem;
        margin-bottom: 12px;
    }

    .platform-card p {
        font-size: 0.95rem;
        margin-bottom: 16px;
    }

    /* 客户案例优化 */
    .clients-stats {
        flex-direction: column;
        gap: 30px;
        padding: 30px 20px;
    }

    .client-stat-number {
        font-size: 2.8rem;
    }

    /* 表单消息优化 */
    .form-message {
        font-size: 0.95rem;
        padding: 14px 18px;
        margin-top: 12px;
    }

    /* FAQ分类标题优化 */
    .faq-category-title {
        font-size: 1.2rem;
        margin-bottom: 16px;
    }

    /* 关于我们优化 */
    .about-text p {
        font-size: 1rem;
        line-height: 1.8;
        margin-bottom: 16px;
    }

    /* 服务流程优化 */
    .service-process {
        padding: 30px 20px;
    }

    /* 联系信息优化 */
    .cta-contact {
        font-size: 1rem;
        margin-top: 20px;
    }

    .cta-contact strong {
        font-size: 1.1rem;
    }

    /* AI作业批改 - 移动端适配 */
    .grading-comparison {
        flex-direction: column;
        padding: 20px;
        gap: 15px;
    }

    .grading-arrow {
        transform: rotate(90deg);
        font-size: 1.5rem;
    }

    .dimension-cards {
        grid-template-columns: 1fr;
        gap: 12px;
    }

    .dimension-card {
        padding: 15px;
    }

    .dim-card-icon {
        width: 45px;
        height: 45px;
        font-size: 1.5rem;
    }

    .dim-card-content h5 {
        font-size: 0.95rem;
    }

    .dim-card-content p {
        font-size: 0.75rem;
    }
}

/* Hide decorative elements on mobile */
@media (max-width: 768px) {
    .section-decor {
        display: none;
    }
    
    .section-divider {
        height: 40px;
    }
}

/* Mobile Menu Overlay */
.nav-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 999;
}

.nav-overlay.active {
    opacity: 1;
    visibility: visible;
}