/* ===========================================
   破局科技官网 - 全局样式
   =========================================== */

:root {
    --color-bg: #0A0E27;
    --color-bg-2: #0F1438;
    --color-bg-3: #161B45;
    --color-surface: rgba(255, 255, 255, 0.04);
    --color-surface-2: rgba(255, 255, 255, 0.06);
    --color-border: rgba(255, 255, 255, 0.08);
    --color-border-strong: rgba(255, 255, 255, 0.15);
    --color-text: #ffffff;
    --color-text-2: rgba(255, 255, 255, 0.7);
    --color-text-3: rgba(255, 255, 255, 0.5);
    --color-primary: #7C3AED;
    --color-primary-2: #6D28D9;
    --color-accent: #06B6D4;
    --color-accent-2: #0891B2;
    --color-pink: #EC4899;
    --color-success: #10B981;
    --gradient-primary: linear-gradient(135deg, #7C3AED 0%, #06B6D4 100%);
    --gradient-2: linear-gradient(135deg, #EC4899 0%, #7C3AED 100%);
    --gradient-3: linear-gradient(135deg, #06B6D4 0%, #10B981 100%);
    --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 10px 25px -3px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 25px 50px -12px rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 0 30px rgba(124, 58, 237, 0.3);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    overflow-x: hidden;
    font-weight: 400;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 32px;
}

strong {
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

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

ul {
    list-style: none;
}

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

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

/* ===========================================
   导航栏
   =========================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 16px 0;
    background: rgba(10, 14, 39, 0.6);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid transparent;
    transition: var(--transition);
}

.navbar.scrolled {
    background: rgba(10, 14, 39, 0.9);
    border-bottom-color: var(--color-border);
    padding: 12px 0;
}

.nav-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 32px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
}

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

.logo-icon {
    flex-shrink: 0;
}

.logo-text {
    line-height: 1.2;
}

.logo-name {
    font-size: 18px;
    font-weight: 700;
    letter-spacing: 0.5px;
}

.logo-tagline {
    font-size: 11px;
    color: var(--color-text-3);
    letter-spacing: 1.5px;
    text-transform: uppercase;
    margin-top: 2px;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 4px;
    flex: 1;
    justify-content: center;
}

.nav-link {
    padding: 8px 16px;
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text-2);
    border-radius: var(--radius-sm);
    position: relative;
}

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

.nav-cta {
    padding: 10px 24px;
    background: var(--gradient-primary);
    border-radius: 100px;
    font-size: 14px;
    font-weight: 600;
    color: white !important;
    box-shadow: 0 4px 14px rgba(124, 58, 237, 0.4);
    transition: var(--transition);
}

.nav-cta:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(124, 58, 237, 0.5);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text);
    border-radius: 2px;
    transition: var(--transition);
}

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

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

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

/* ===========================================
   Hero
   =========================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 120px 0 80px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
    pointer-events: none;
}

.hero-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.5;
    animation: float 20s ease-in-out infinite;
}

.hero-orb-1 {
    width: 500px;
    height: 500px;
    background: var(--color-primary);
    top: -200px;
    left: -100px;
}

.hero-orb-2 {
    width: 400px;
    height: 400px;
    background: var(--color-accent);
    bottom: -100px;
    right: -100px;
    animation-delay: -5s;
}

.hero-orb-3 {
    width: 300px;
    height: 300px;
    background: var(--color-pink);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: -10s;
}

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

.hero-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at center, black 0%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 0%, transparent 70%);
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 32px;
    text-align: center;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    background: var(--color-surface-2);
    border: 1px solid var(--color-border-strong);
    border-radius: 100px;
    font-size: 13px;
    color: var(--color-text-2);
    margin-bottom: 32px;
    backdrop-filter: blur(10px);
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: var(--color-success);
    border-radius: 50%;
    box-shadow: 0 0 10px var(--color-success);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.hero-title {
    font-size: clamp(36px, 5.5vw, 64px);
    line-height: 1.2;
    font-weight: 700;
    margin-bottom: 24px;
    letter-spacing: -0.5px;
}

.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 900;
}

.gradient-text-2 {
    background: var(--gradient-3);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 900;
}

.hero-subtitle {
    font-size: clamp(15px, 1.4vw, 18px);
    color: var(--color-text-2);
    max-width: 760px;
    margin: 0 auto 40px;
    line-height: 1.8;
}

.hero-subtitle strong {
    color: var(--color-text);
    background: none;
    -webkit-text-fill-color: var(--color-text);
    font-weight: 600;
    padding: 0 2px;
}

.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 80px;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    border-radius: 100px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: 1px solid transparent;
    white-space: nowrap;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 14px rgba(124, 58, 237, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(124, 58, 237, 0.5);
}

.btn-secondary {
    background: var(--color-surface-2);
    border-color: var(--color-border-strong);
    color: var(--color-text);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: var(--color-surface);
    border-color: var(--color-primary);
    transform: translateY(-2px);
}

.btn-sm {
    padding: 10px 20px;
    font-size: 14px;
}

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

.hero-stats {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 48px;
    padding: 32px 40px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(20px);
    max-width: 800px;
    margin: 0 auto;
}

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

.stat-number {
    display: inline-block;
    font-size: 42px;
    font-weight: 800;
    line-height: 1;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.stat-unit {
    display: inline-block;
    font-size: 28px;
    font-weight: 700;
    color: var(--color-primary);
    margin-left: 2px;
}

.stat-label {
    font-size: 13px;
    color: var(--color-text-3);
    margin-top: 4px;
    letter-spacing: 1px;
}

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

.scroll-indicator {
    position: absolute;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--color-text-3);
    font-size: 12px;
    letter-spacing: 1px;
    z-index: 1;
}

.scroll-line {
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, var(--color-primary), transparent);
    animation: scrollLine 2s ease-in-out infinite;
}

@keyframes scrollLine {
    0%, 100% { transform: scaleY(1); opacity: 1; }
    50% { transform: scaleY(0.5); opacity: 0.5; }
}

/* ===========================================
   通用 Section
   =========================================== */
section {
    position: relative;
    padding: 100px 0;
}

.section-header {
    text-align: center;
    max-width: 720px;
    margin: 0 auto 64px;
}

.section-tag {
    display: inline-block;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 3px;
    color: var(--color-accent);
    margin-bottom: 16px;
    padding: 6px 16px;
    background: rgba(6, 182, 212, 0.1);
    border: 1px solid rgba(6, 182, 212, 0.2);
    border-radius: 100px;
}

.section-tag.light {
    color: var(--color-accent);
    background: rgba(6, 182, 212, 0.15);
    border-color: rgba(6, 182, 212, 0.3);
}

.section-title {
    font-size: clamp(28px, 4vw, 44px);
    line-height: 1.3;
    font-weight: 700;
    margin-bottom: 16px;
    letter-spacing: -0.5px;
}

.section-desc {
    font-size: 16px;
    color: var(--color-text-2);
    line-height: 1.7;
}

/* ===========================================
   About
   =========================================== */
.about {
    background: linear-gradient(180deg, var(--color-bg) 0%, var(--color-bg-2) 100%);
}

.about-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 64px;
    align-items: start;
}

.about-text h3 {
    font-size: 22px;
    font-weight: 700;
    margin: 32px 0 16px;
    color: var(--color-text);
}

.about-text h3:first-child {
    margin-top: 0;
}

.about-text p {
    color: var(--color-text-2);
    font-size: 15px;
    line-height: 1.9;
    margin-bottom: 16px;
}

.about-text strong {
    background: none;
    -webkit-text-fill-color: var(--color-accent);
    color: var(--color-accent);
    font-weight: 600;
}

.about-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.feature-card {
    padding: 28px 24px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: var(--transition);
}

.feature-card:hover {
    background: var(--color-surface-2);
    border-color: var(--color-primary);
    transform: translateY(-4px);
}

.feature-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    margin-bottom: 16px;
}

.feature-card h4 {
    font-size: 17px;
    font-weight: 700;
    margin-bottom: 8px;
}

.feature-card p {
    font-size: 13px;
    color: var(--color-text-3);
    line-height: 1.6;
}

/* ===========================================
   Products
   =========================================== */
.products {
    background: var(--color-bg-2);
}

.product-category {
    margin-bottom: 80px;
}

.product-category:last-child {
    margin-bottom: 0;
}

.category-header {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-bottom: 32px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--color-border);
}

.category-icon {
    width: 56px;
    height: 56px;
    border-radius: 14px;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    flex-shrink: 0;
}

.category-header h3 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 4px;
}

.category-header p {
    font-size: 14px;
    color: var(--color-text-3);
}

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

.product-card {
    position: relative;
    padding: 28px 24px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.product-card:hover {
    background: var(--color-surface-2);
    border-color: var(--color-primary);
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.product-card.highlight {
    background: linear-gradient(135deg, rgba(124, 58, 237, 0.15) 0%, rgba(6, 182, 212, 0.1) 100%);
    border-color: rgba(124, 58, 237, 0.4);
}

.product-card.highlight::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--gradient-primary);
    opacity: 0;
    border-radius: var(--radius-lg);
    z-index: -1;
    filter: blur(20px);
    transition: var(--transition);
}

.product-card.highlight:hover::before {
    opacity: 0.3;
}

.product-tag {
    position: absolute;
    top: 16px;
    right: 16px;
    padding: 4px 10px;
    background: var(--gradient-primary);
    border-radius: 100px;
    font-size: 11px;
    font-weight: 700;
    color: white;
    letter-spacing: 0.5px;
}

.product-card h4 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 12px;
    line-height: 1.4;
    padding-right: 60px;
}

.product-card p {
    font-size: 13.5px;
    color: var(--color-text-2);
    line-height: 1.7;
    margin-bottom: 16px;
    flex: 1;
}

.product-features {
    margin-bottom: 16px;
}

.product-features li {
    position: relative;
    padding-left: 18px;
    font-size: 13px;
    color: var(--color-text-2);
    line-height: 1.8;
}

.product-features li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 12px;
    width: 6px;
    height: 6px;
    background: var(--color-accent);
    border-radius: 50%;
}

.product-link {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    color: var(--color-accent);
    font-size: 13px;
    font-weight: 600;
    margin-top: auto;
}

.product-link:hover {
    color: var(--color-primary);
    gap: 8px;
}

/* ===========================================
   Solutions
   =========================================== */
.solutions {
    background: linear-gradient(180deg, var(--color-bg-2) 0%, var(--color-bg-3) 100%);
}

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

.solution-card {
    position: relative;
    padding: 36px 28px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: var(--transition);
    overflow: hidden;
}

.solution-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transform-origin: left;
    transition: var(--transition);
}

.solution-card:hover {
    background: var(--color-surface-2);
    transform: translateY(-4px);
    border-color: var(--color-border-strong);
}

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

.solution-num {
    font-size: 36px;
    font-weight: 900;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 16px;
    line-height: 1;
}

.solution-card h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 12px;
}

.solution-card p {
    font-size: 13.5px;
    color: var(--color-text-2);
    line-height: 1.7;
    margin-bottom: 20px;
}

.solution-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.solution-tags span {
    padding: 4px 12px;
    background: var(--color-surface-2);
    border: 1px solid var(--color-border);
    border-radius: 100px;
    font-size: 12px;
    color: var(--color-text-2);
}

/* ===========================================
   Agents
   =========================================== */
.agents {
    background: var(--color-bg-3);
}

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

.agent-card {
    padding: 32px 24px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    text-align: center;
    transition: var(--transition);
}

.agent-card:hover {
    background: var(--color-surface-2);
    transform: translateY(-4px);
    border-color: var(--color-primary);
}

.agent-avatar {
    font-size: 48px;
    margin-bottom: 16px;
    line-height: 1;
}

.agent-card h3 {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 10px;
    line-height: 1.4;
}

.agent-card p {
    font-size: 13px;
    color: var(--color-text-3);
    line-height: 1.6;
}

/* ===========================================
   Courses
   =========================================== */
.courses {
    background: linear-gradient(180deg, var(--color-bg-3) 0%, var(--color-bg-2) 100%);
}

.course-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.course-card {
    position: relative;
    padding: 40px 32px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.course-card:hover {
    transform: translateY(-6px);
    border-color: var(--color-primary);
    box-shadow: var(--shadow-lg);
}

.course-card.featured {
    background: linear-gradient(135deg, rgba(124, 58, 237, 0.18) 0%, rgba(6, 182, 212, 0.12) 100%);
    border-color: rgba(124, 58, 237, 0.4);
    transform: scale(1.03);
}

.course-card.featured:hover {
    transform: scale(1.03) translateY(-6px);
}

.course-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    padding: 6px 16px;
    background: var(--gradient-2);
    border-radius: 100px;
    font-size: 12px;
    font-weight: 700;
    color: white;
    letter-spacing: 0.5px;
    box-shadow: 0 4px 14px rgba(236, 72, 153, 0.4);
}

.course-duration {
    display: inline-block;
    padding: 6px 14px;
    background: var(--color-surface-2);
    border: 1px solid var(--color-border);
    border-radius: 100px;
    font-size: 12px;
    color: var(--color-accent);
    margin-bottom: 20px;
    align-self: flex-start;
    font-weight: 600;
}

.course-card h3 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 8px;
    line-height: 1.3;
}

.course-tagline {
    font-size: 14px;
    color: var(--color-text-2);
    margin-bottom: 24px;
    line-height: 1.6;
}

.course-content {
    margin-bottom: 28px;
    flex: 1;
}

.course-content li {
    position: relative;
    padding-left: 24px;
    font-size: 13.5px;
    color: var(--color-text-2);
    line-height: 1.8;
    margin-bottom: 6px;
}

.course-content li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-accent);
    font-weight: 700;
}

.course-cta {
    margin-top: auto;
}

/* ===========================================
   Methodology
   =========================================== */
.methodology {
    background: var(--color-bg-2);
}

.method-flow {
    display: flex;
    align-items: stretch;
    gap: 8px;
    flex-wrap: wrap;
    justify-content: center;
}

.method-step {
    flex: 1;
    min-width: 140px;
    padding: 28px 20px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    text-align: center;
    transition: var(--transition);
}

.method-step:hover {
    background: var(--color-surface-2);
    border-color: var(--color-primary);
    transform: translateY(-4px);
}

.method-num {
    font-size: 32px;
    font-weight: 900;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 8px;
    line-height: 1;
}

.method-step h4 {
    font-size: 15px;
    font-weight: 700;
    margin-bottom: 4px;
}

.method-step p {
    font-size: 12px;
    color: var(--color-text-3);
    line-height: 1.5;
}

.method-arrow {
    align-self: center;
    color: var(--color-primary);
    font-size: 24px;
    font-weight: 700;
}

/* ===========================================
   Why
   =========================================== */
.why {
    background: linear-gradient(180deg, var(--color-bg-2) 0%, var(--color-bg-3) 100%);
}

.why-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.why-item {
    padding: 32px 28px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: var(--transition);
}

.why-item:hover {
    background: var(--color-surface-2);
    border-color: var(--color-primary);
    transform: translateY(-4px);
}

.why-icon {
    font-size: 36px;
    margin-bottom: 16px;
    display: inline-block;
}

.why-item h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 10px;
}

.why-item p {
    font-size: 14px;
    color: var(--color-text-2);
    line-height: 1.7;
}

/* ===========================================
   Contact
   =========================================== */
.contact {
    background: linear-gradient(135deg, var(--color-bg-3) 0%, var(--color-bg) 100%);
    position: relative;
    overflow: hidden;
}

.contact::before {
    content: '';
    position: absolute;
    top: -200px;
    right: -200px;
    width: 600px;
    height: 600px;
    background: var(--color-primary);
    border-radius: 50%;
    filter: blur(150px);
    opacity: 0.2;
}

.contact-wrapper {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 1fr 1.1fr;
    gap: 64px;
    align-items: start;
}

.contact-title {
    font-size: clamp(28px, 4vw, 44px);
    line-height: 1.3;
    font-weight: 700;
    margin-bottom: 16px;
    letter-spacing: -0.5px;
}

.contact-desc {
    font-size: 16px;
    color: var(--color-text-2);
    line-height: 1.7;
    margin-bottom: 40px;
}

.contact-items {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

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

.contact-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    flex-shrink: 0;
}

.contact-label {
    font-size: 13px;
    color: var(--color-text-3);
    margin-bottom: 2px;
}

.contact-value {
    font-size: 16px;
    font-weight: 600;
    color: var(--color-text);
}

.contact-form-wrapper {
    padding: 40px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--color-border-strong);
    border-radius: var(--radius-xl);
    backdrop-filter: blur(20px);
}

.contact-form h3 {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 8px;
}

.form-desc {
    font-size: 14px;
    color: var(--color-text-2);
    margin-bottom: 28px;
}

.form-group {
    margin-bottom: 18px;
}

.form-group label {
    display: block;
    font-size: 13px;
    color: var(--color-text-2);
    margin-bottom: 8px;
    font-weight: 500;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    background: var(--color-bg-2);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text);
    font-size: 14px;
    font-family: inherit;
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    background: var(--color-bg-3);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--color-text-3);
}

.form-group select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23ffffff80' stroke-width='2'%3e%3cpath d='M6 9l6 6 6-6'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 12px center;
    background-size: 18px;
    padding-right: 40px;
}

.form-group select option {
    background: var(--color-bg-2);
    color: var(--color-text);
}

.form-group textarea {
    resize: vertical;
    min-height: 80px;
}

.form-tip {
    text-align: center;
    font-size: 12px;
    color: var(--color-text-3);
    margin-top: 16px;
}

/* ===========================================
   Footer
   =========================================== */
.footer {
    background: #050818;
    border-top: 1px solid var(--color-border);
    padding: 64px 0 32px;
}

.footer-content {
    display: grid;
    grid-template-columns: 1.2fr 3fr;
    gap: 64px;
    margin-bottom: 48px;
}

.footer-brand .logo {
    margin-bottom: 16px;
}

.footer-slogan {
    font-size: 14px;
    color: var(--color-text-3);
    line-height: 1.7;
}

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

.footer-col h4 {
    font-size: 14px;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--color-text);
}

.footer-col a {
    display: block;
    font-size: 13px;
    color: var(--color-text-3);
    padding: 4px 0;
}

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

.footer-bottom {
    padding-top: 32px;
    border-top: 1px solid var(--color-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
    font-size: 13px;
    color: var(--color-text-3);
}

/* ===========================================
   Back to top
   =========================================== */
.back-to-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 48px;
    height: 48px;
    background: var(--gradient-primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-md);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: var(--transition);
    z-index: 999;
}

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

.back-to-top:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

/* ===========================================
   响应式
   =========================================== */
@media (max-width: 1024px) {
    .product-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .agent-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

    .course-card.featured {
        transform: none;
    }

    .course-card.featured:hover {
        transform: translateY(-6px);
    }

    .why-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

@media (max-width: 768px) {
    .container {
        padding: 0 20px;
    }

    .nav-container {
        padding: 0 20px;
    }

    .nav-menu {
        position: fixed;
        top: 64px;
        left: 0;
        right: 0;
        flex-direction: column;
        background: rgba(10, 14, 39, 0.98);
        backdrop-filter: blur(20px);
        padding: 20px;
        gap: 8px;
        transform: translateY(-200%);
        opacity: 0;
        transition: var(--transition);
    }

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

    .nav-menu .nav-link {
        width: 100%;
        padding: 12px 16px;
    }

    .nav-cta {
        display: none;
    }

    .nav-toggle {
        display: flex;
    }

    .hero {
        padding: 100px 0 60px;
        min-height: auto;
    }

    .hero-stats {
        flex-wrap: wrap;
        gap: 24px;
        padding: 24px;
    }

    .stat-divider {
        display: none;
    }

    .stat-item {
        flex: 1 1 40%;
    }

    .scroll-indicator {
        display: none;
    }

    section {
        padding: 64px 0;
    }

    .about-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

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

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

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

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

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

    .method-flow {
        gap: 12px;
    }

    .method-step {
        flex: 1 1 calc(50% - 12px);
        min-width: auto;
    }

    .method-arrow {
        display: none;
    }

    .contact-wrapper {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .contact-form-wrapper {
        padding: 28px 24px;
    }

    .footer-links {
        grid-template-columns: repeat(2, 1fr);
    }

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

@media (max-width: 480px) {
    .hero-actions {
        flex-direction: column;
        width: 100%;
    }

    .hero-actions .btn {
        width: 100%;
        justify-content: center;
    }

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

/* ===========================================
   滚动动画
   =========================================== */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

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