/* ============================================
   辉炬源科技 — 企业官网样式
   ============================================ */

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

:root {
    --primary: #4f46e5;
    --primary-light: #6366f1;
    --primary-dark: #3730a3;
    --accent: #06b6d4;
    --accent-light: #22d3ee;
    --dark: #0f172a;
    --dark-light: #1e293b;
    --gray-900: #111827;
    --gray-800: #1f2937;
    --gray-700: #374151;
    --gray-600: #4b5563;
    --gray-500: #6b7280;
    --gray-400: #9ca3af;
    --gray-300: #d1d5db;
    --gray-200: #e5e7eb;
    --gray-100: #f3f4f6;
    --gray-50: #f9fafb;
    --white: #ffffff;
    --gradient-1: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-2: linear-gradient(135deg, #06b6d4 0%, #4f46e5 100%);
    --gradient-3: linear-gradient(135deg, #4f46e5 0%, #06b6d4 100%);
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -2px rgba(0,0,0,0.1);
    --shadow-md: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -4px rgba(0,0,0,0.1);
    --shadow-lg: 0 20px 25px -5px rgba(0,0,0,0.1), 0 8px 10px -6px rgba(0,0,0,0.1);
    --shadow-xl: 0 25px 50px -12px rgba(0,0,0,0.25);
    --radius: 8px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--gray-700);
    background: var(--white);
    line-height: 1.7;
    overflow-x: hidden;
}

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

ul { list-style: none; }

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* --- 导航栏 --- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 16px 0;
    transition: var(--transition);
    background: transparent;
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 1px 0 rgba(0,0,0,0.08);
    padding: 10px 0;
}

.navbar .nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--white);
    transition: var(--transition);
}

.navbar.scrolled .logo { color: var(--dark); }

.logo-icon {
    width: 40px;
    height: 40px;
    background: var(--gradient-1);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    font-weight: 900;
    color: white;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
    flex-shrink: 0;
}

.logo-img {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    flex-shrink: 0;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 4px;
}

.nav-link {
    padding: 8px 16px;
    font-size: 0.9rem;
    font-weight: 500;
    color: rgba(255,255,255,0.85);
    border-radius: var(--radius);
    transition: var(--transition);
}

.navbar.scrolled .nav-link { color: var(--gray-600); }

.nav-link:hover,
.nav-link.active {
    color: var(--white);
    background: rgba(255,255,255,0.15);
}

.navbar.scrolled .nav-link:hover,
.navbar.scrolled .nav-link.active {
    color: var(--primary);
    background: rgba(79, 70, 229, 0.08);
}

.nav-cta {
    background: var(--gradient-1) !important;
    color: white !important;
    font-weight: 600;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

.nav-cta:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 16px rgba(102, 126, 234, 0.4) !important;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

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

.navbar.scrolled .nav-toggle span { background: var(--dark); }

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

.hero-bg {
    position: absolute;
    inset: 0;
    overflow: hidden;
}

.hero-gradient {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 80% 60% at 20% 40%, rgba(99, 102, 241, 0.35) 0%, transparent 60%),
        radial-gradient(ellipse 60% 50% at 80% 60%, rgba(6, 182, 212, 0.25) 0%, transparent 60%),
        radial-gradient(ellipse 50% 40% at 50% 100%, rgba(126, 34, 206, 0.2) 0%, transparent 50%),
        linear-gradient(180deg, #0f172a 0%, #1e1b4b 50%, #0f172a 100%);
}

.hero-particles {
    position: absolute;
    inset: 0;
}

.hero-particles span {
    position: absolute;
    width: 4px;
    height: 4px;
    background: rgba(255,255,255,0.3);
    border-radius: 50%;
    animation: float 6s ease-in-out infinite;
}

.hero-particles span:nth-child(1) { top: 20%; left: 10%; animation-delay: 0s; }
.hero-particles span:nth-child(2) { top: 30%; left: 80%; animation-delay: 1s; width: 6px; height: 6px; }
.hero-particles span:nth-child(3) { top: 60%; left: 15%; animation-delay: 2s; }
.hero-particles span:nth-child(4) { top: 70%; left: 85%; animation-delay: 3s; width: 3px; height: 3px; }
.hero-particles span:nth-child(5) { top: 15%; left: 50%; animation-delay: 1.5s; width: 5px; height: 5px; }
.hero-particles span:nth-child(6) { top: 80%; left: 40%; animation-delay: 2.5s; }
.hero-particles span:nth-child(7) { top: 45%; left: 70%; animation-delay: 0.5s; width: 3px; height: 3px; }
.hero-particles span:nth-child(8) { top: 55%; left: 5%; animation-delay: 3.5s; }
.hero-particles span:nth-child(9) { top: 10%; left: 65%; animation-delay: 4s; width: 6px; height: 6px; background: rgba(99,102,241,0.5); }
.hero-particles span:nth-child(10) { top: 90%; left: 75%; animation-delay: 2s; background: rgba(6,182,212,0.5); }
.hero-particles span:nth-child(11) { top: 35%; left: 30%; animation-delay: 1s; width: 5px; height: 5px; }
.hero-particles span:nth-child(12) { top: 75%; left: 55%; animation-delay: 3s; background: rgba(6,182,212,0.4); }

@keyframes float {
    0%, 100% { transform: translateY(0) scale(1); opacity: 0.3; }
    50% { transform: translateY(-20px) scale(1.2); opacity: 0.8; }
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    /* max-width: 800px; */
    padding: 0 24px;
}

.hero-logo {
    display: flex;
    justify-content: center;
    margin-bottom: 20px;
}

.hero-logo img {
    width: 64px;
    height: 64px;
    filter: drop-shadow(0 8px 24px rgba(102, 126, 234, 0.5));
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    background: rgba(99, 102, 241, 0.2);
    border: 1px solid rgba(99, 102, 241, 0.3);
    border-radius: 50px;
    color: var(--accent-light);
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 28px;
    backdrop-filter: blur(10px);
}

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

@keyframes pulse-dot {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.5); }
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 900;
    color: var(--white);
    line-height: 1.15;
    margin-bottom: 24px;
    letter-spacing: -0.02em;
}

.hero-title .title-line {
    font-size: clamp(1.5rem, 4vw, 3.5rem);
    display: block;
}

.hero-title .highlight {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    background: var(--gradient-2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-desc {
    font-size: 1.15rem;
    color: rgba(255,255,255,0.65);
    line-height: 1.8;
    margin-bottom: 40px;
    max-width: 640px;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 64px;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: 50px;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
}

.btn-primary {
    background: var(--gradient-1);
    color: white;
    box-shadow: 0 8px 24px rgba(99, 102, 241, 0.35);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 32px rgba(99, 102, 241, 0.45);
}

.btn-outline {
    background: rgba(255,255,255,0.1);
    color: white;
    border: 1px solid rgba(255,255,255,0.25);
    backdrop-filter: blur(10px);
}

.btn-outline:hover {
    background: rgba(255,255,255,0.2);
    border-color: rgba(255,255,255,0.4);
    transform: translateY(-2px);
}

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

.hero-stats {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 40px;
}

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

.stat-number {
    font-size: 2rem;
    font-weight: 900;
    color: var(--white);
    letter-spacing: -0.02em;
}

.stat-suffix {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--accent-light);
}

.stat-label {
    display: block;
    font-size: 0.85rem;
    color: rgba(255,255,255,0.5);
    margin-top: 4px;
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: rgba(255,255,255,0.15);
}

.hero-scroll {
    position: absolute;
    bottom: 36px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
}

.hero-scroll a {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: rgba(255,255,255,0.4);
    font-size: 0.75rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.scroll-line {
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, rgba(255,255,255,0.5), transparent);
    animation: scroll-anim 2s ease-in-out infinite;
}

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

/* --- 通用 Section --- */
.section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-tag {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--primary);
    background: rgba(79, 70, 229, 0.08);
    padding: 6px 16px;
    border-radius: 50px;
    margin-bottom: 16px;
}

.section-title {
    font-size: clamp(1.8rem, 4vw, 2.8rem);
    font-weight: 900;
    color: var(--dark);
    line-height: 1.2;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.section-desc {
    font-size: 1.1rem;
    color: var(--gray-500);
    max-width: 560px;
    margin: 0 auto;
}

/* --- 公司简介 --- */
.about { background: var(--gray-50); }

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

.about-image {
    position: relative;
}

.about-img-wrapper {
    position: relative;
    width: 100%;
    aspect-ratio: 4/3;
    border-radius: var(--radius-xl);
    overflow: hidden;
    background: var(--gradient-1);
    box-shadow: var(--shadow-xl);
}

.about-img-bg {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 30% 40%, rgba(255,255,255,0.15) 0%, transparent 50%),
        linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.about-img-content {
    position: absolute;
    bottom: 24px;
    left: 24px;
    right: 24px;
    color: white;
}

.about-img-content .img-stat {
    display: flex;
    align-items: baseline;
    gap: 4px;
}

.about-img-content .img-stat span:first-child {
    font-size: 3.5rem;
    font-weight: 900;
    line-height: 1;
}

.about-img-content .img-stat span:last-child {
    font-size: 1.1rem;
    font-weight: 500;
    opacity: 0.8;
}

.about-img-content p {
    font-size: 0.9rem;
    opacity: 0.8;
    margin-top: 4px;
}

.about-floating-card {
    position: absolute;
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-lg);
    padding: 14px 18px;
    display: flex;
    align-items: center;
    gap: 12px;
    box-shadow: var(--shadow-lg);
    color: var(--dark);
}

.about-floating-card .card-icon { font-size: 1.5rem; }
.about-floating-card strong { display: block; font-size: 0.85rem; }
.about-floating-card span { font-size: 0.75rem; color: var(--gray-500); }

.card-1 { top: 20px; right: -20px; }
.card-2 { bottom: 150px; left: -20px; }

.about-content h3 {
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--dark);
    margin-bottom: 16px;
    line-height: 1.3;
}

.about-text {
    color: var(--gray-600);
    margin-bottom: 32px;
    font-size: 1rem;
    line-height: 1.8;
}

.about-features {
    display: grid;
    gap: 20px;
}

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

.feature-icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    background: rgba(79, 70, 229, 0.08);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
}

.feature-item h4 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 2px;
}

.feature-item p {
    font-size: 0.85rem;
    color: var(--gray-500);
}

/* --- 成功案例 --- */
.cases { background: var(--white); }

.cases-filter {
    display: flex;
    justify-content: center;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: 48px;
}

.filter-btn {
    padding: 8px 20px;
    font-size: 0.875rem;
    font-weight: 500;
    border: 1px solid var(--gray-200);
    border-radius: 50px;
    background: var(--white);
    color: var(--gray-600);
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
}

.filter-btn:hover { border-color: var(--primary); color: var(--primary); }

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

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

.case-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--gray-100);
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

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

.case-image {
    position: relative;
    aspect-ratio: 16/10;
    overflow: hidden;
}

.case-img-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.5s ease;
}

.case-card:hover .case-img-placeholder { transform: scale(1.05); }

.case-industry {
    background: rgba(255,255,255,0.2);
    backdrop-filter: blur(10px);
    padding: 6px 16px;
    border-radius: 50px;
    color: white;
    font-size: 0.8rem;
    font-weight: 600;
}

.case-overlay {
    position: absolute;
    inset: 0;
    background: rgba(15, 23, 42, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition);
}

.case-card:hover .case-overlay { opacity: 1; }

.case-link-btn {
    padding: 10px 24px;
    background: white;
    color: var(--dark);
    font-weight: 600;
    font-size: 0.9rem;
    border-radius: 50px;
    transform: translateY(10px);
    transition: var(--transition);
}

.case-card:hover .case-link-btn { transform: translateY(0); }

.case-info { padding: 24px; }

.case-tag {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 8px;
}

.case-info h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 8px;
    line-height: 1.4;
}

.case-info p {
    font-size: 0.875rem;
    color: var(--gray-500);
    line-height: 1.7;
    margin-bottom: 16px;
}

.case-metrics {
    display: flex;
    gap: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--gray-100);
}

.metric { flex: 1; text-align: center; }

.metric-value {
    display: block;
    font-size: 1.1rem;
    font-weight: 800;
    color: var(--primary);
}

.metric-label {
    display: block;
    font-size: 0.7rem;
    color: var(--gray-400);
    margin-top: 2px;
}

/* --- 合作模式 --- */
.cooperation { background: var(--gray-50); }

.cooperation-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 28px;
}

.coop-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 36px;
    border: 1px solid var(--gray-100);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.coop-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-1);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

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

.coop-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}

.coop-card-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    margin-bottom: 20px;
}

.coop-icon {
    width: 56px;
    height: 56px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    box-shadow: 0 8px 20px rgba(0,0,0,0.15);
}

.coop-badge {
    padding: 4px 12px;
    background: rgba(79, 70, 229, 0.08);
    color: var(--primary);
    font-size: 0.75rem;
    font-weight: 700;
    border-radius: 50px;
}

.coop-card h3 {
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--dark);
    margin-bottom: 10px;
}

.coop-desc {
    font-size: 0.9rem;
    color: var(--gray-500);
    line-height: 1.7;
    margin-bottom: 20px;
}

.coop-features {
    display: grid;
    gap: 10px;
    margin-bottom: 24px;
}

.coop-features li {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.875rem;
    color: var(--gray-700);
}

.coop-features li svg { color: var(--primary); flex-shrink: 0; }

.coop-cta {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 24px;
    background: var(--gray-50);
    color: var(--primary);
    font-weight: 600;
    font-size: 0.9rem;
    border-radius: 50px;
    border: 1px solid var(--gray-200);
    transition: var(--transition);
}

.coop-cta:hover {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
    transform: translateX(4px);
}

/* --- 入驻规则 --- */
.rules { background: var(--white); }

.rules-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
}

.rules-title {
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--dark);
    margin-bottom: 32px;
}

.steps-timeline {
    position: relative;
    padding-left: 48px;
}

.steps-timeline::before {
    content: '';
    position: absolute;
    left: 18px;
    top: 0;
    bottom: 20px;
    width: 2px;
    background: linear-gradient(to bottom, var(--primary), var(--accent));
    border-radius: 2px;
}

.step {
    position: relative;
    padding-bottom: 32px;
}

.step:last-child { padding-bottom: 0; }

.step-number {
    position: absolute;
    left: -48px;
    top: 0;
    width: 36px;
    height: 36px;
    background: var(--gradient-1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 800;
    color: white;
    box-shadow: 0 4px 12px rgba(99,102,241,0.3);
}

.step-content h4 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 4px;
}

.step-content p {
    font-size: 0.875rem;
    color: var(--gray-500);
    line-height: 1.6;
}

.requirements-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.req-card {
    background: var(--gray-50);
    border-radius: var(--radius-lg);
    padding: 24px;
    border: 1px solid var(--gray-100);
    transition: var(--transition);
}

.req-card:hover {
    border-color: var(--primary);
    box-shadow: 0 4px 16px rgba(79,70,229,0.1);
}

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

.req-card h4 {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 12px;
}

.req-card ul { display: grid; gap: 8px; }

.req-card li {
    font-size: 0.8rem;
    color: var(--gray-600);
    padding-left: 16px;
    position: relative;
}

.req-card li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 7px;
    width: 6px;
    height: 6px;
    background: var(--primary);
    border-radius: 50%;
}

/* --- 数据统计 --- */
.stats-section {
    background: var(--dark);
    padding: 80px 0;
    position: relative;
    overflow: hidden;
}

.stats-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 60% 50% at 0% 50%, rgba(99,102,241,0.2) 0%, transparent 60%),
        radial-gradient(ellipse 60% 50% at 100% 50%, rgba(6,182,212,0.15) 0%, transparent 60%);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
    position: relative;
    z-index: 1;
}

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

.stat-value {
    font-size: 3rem;
    font-weight: 900;
    background: var(--gradient-2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
}

.stat-unit {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--accent-light);
    margin-left: 2px;
}

.stat-label {
    display: block;
    font-size: 0.9rem;
    color: rgba(255,255,255,0.5);
    margin-top: 8px;
}

/* --- 联系我们 --- */
.contact { background: var(--gray-50); }

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

.contact-desc {
    font-size: 1rem;
    color: var(--gray-500);
    line-height: 1.8;
    margin-bottom: 36px;
}

.contact-details { display: grid; gap: 24px; }

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

.contact-icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    background: rgba(79, 70, 229, 0.08);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
}

.contact-item strong {
    display: block;
    font-size: 0.9rem;
    color: var(--dark);
    margin-bottom: 2px;
}

.contact-item span {
    font-size: 0.875rem;
    color: var(--gray-500);
}

.contact-form-wrapper {
    background: var(--white);
    border-radius: var(--radius-xl);
    padding: 40px;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--gray-100);
}

.contact-form h3 {
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--dark);
    margin-bottom: 28px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.form-group {
    display: grid;
    gap: 6px;
    margin-bottom: 16px;
}

.form-group label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--gray-700);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    font-size: 0.9rem;
    font-family: inherit;
    color: var(--dark);
    background: var(--gray-50);
    transition: var(--transition);
    outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
    background: var(--white);
}

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

/* --- Footer --- */
.footer {
    background: var(--dark);
    padding: 64px 0 0;
    color: rgba(255,255,255,0.6);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
    padding-bottom: 48px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}

.footer .logo { margin-bottom: 16px; }
.footer .logo-icon { background: var(--gradient-1); }

.footer-brand p {
    font-size: 0.875rem;
    line-height: 1.8;
    color: rgba(255,255,255,0.45);
    margin-bottom: 20px;
}

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

.social-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: rgba(255,255,255,0.06);
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(255,255,255,0.5);
    transition: var(--transition);
}

.social-icon:hover {
    background: var(--primary);
    color: white;
    transform: translateY(-2px);
}

.footer-links h4 {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 20px;
}

.footer-links ul { display: grid; gap: 10px; }

.footer-links a,
.footer-links li {
    font-size: 0.875rem;
    color: rgba(255,255,255,0.45);
    transition: var(--transition);
}

.footer-links a:hover,
.footer-links li:hover { color: var(--white); }

.footer-bottom {
    padding: 24px 0;
    text-align: center;
    font-size: 0.8rem;
    color: rgba(255,255,255,0.3);
}

/* --- 返回顶部 --- */
.back-to-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 48px;
    height: 48px;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 16px rgba(79,70,229,0.4);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: var(--transition);
    z-index: 999;
}

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

.back-to-top:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(79,70,229,0.5);
}

/* --- 动画 --- */
[data-aos] {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-aos].aos-animate {
    opacity: 1;
    transform: translateY(0);
}

/* --- 响应式 --- */
@media (max-width: 1024px) {
    .about-grid { gap: 40px; }
    .cases-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}

@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: var(--white);
        flex-direction: column;
        align-items: flex-start;
        padding: 80px 32px 32px;
        gap: 4px;
        box-shadow: var(--shadow-xl);
        transition: right 0.3s ease;
    }

    .nav-links.open { right: 0; }

    .nav-link {
        color: var(--gray-700) !important;
        width: 100%;
        padding: 12px 16px;
    }

    .nav-link:hover, .nav-link.active {
        background: rgba(79,70,229,0.08) !important;
        color: var(--primary) !important;
    }

    .nav-toggle { display: flex; }

    .hero-stats { gap: 24px; }
    .stat-number { font-size: 1.5rem; }

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

    /* 手机端：浮动卡片移到图片底部堆叠显示 */
    .about-image { display: flex; flex-direction: column; }
    .about-img-content { bottom: 16px; left: 16px; right: 16px; }
    .about-image .about-floating-card {
        position: relative !important;
        display: flex !important;
        visibility: visible !important;
        opacity: 1 !important;
        top: 0 !important;
        left: 0 !important;
        right: 0 !important;
        bottom: 0 !important;
        margin: 12px 16px 0;
        width: calc(100% - 32px);
        z-index: 3;
        transform: none !important;
    }
    .about-image .card-1 { order: 1; }
    .about-image .card-2 { order: 2; margin-bottom: 0; }

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

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

    .rules-content { grid-template-columns: 1fr; gap: 48px; }
    .requirements-grid { grid-template-columns: 1fr; }

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

    .contact-grid { grid-template-columns: 1fr; gap: 40px; }
    .contact-form-wrapper { padding: 28px; }
    .form-row { grid-template-columns: 1fr; }

    .footer-grid { grid-template-columns: 1fr; gap: 28px; }
}

@media (max-width: 480px) {
    .section { padding: 64px 0; }
    .hero-buttons { flex-direction: column; align-items: center; }
    .hero-stats { flex-direction: column; gap: 16px; }
    .stat-divider { display: none; }
    .cases-filter { gap: 6px; }
    .filter-btn { padding: 6px 14px; font-size: 0.8rem; }
}

/* ============================================
   鼠标特效
   ============================================ */

/* 隐藏默认光标（仅桌面端） */
@media (hover: hover) and (pointer: fine) {
    body { cursor: none; }
    a, button, input, select, textarea, [role="button"] { cursor: none; }
}

/* 自定义光标 — 中心圆点 */
.cursor-dot {
    position: fixed;
    top: 0;
    left: 0;
    width: 8px;
    height: 8px;
    background: #6366f1;
    border-radius: 50%;
    pointer-events: none;
    z-index: 99999;
    transform: translate(-50%, -50%);
    transition: width 0.2s ease, height 0.2s ease, background 0.2s ease;
    mix-blend-mode: screen;
}

/* 自定义光标 — 外圈 */
.cursor-ring {
    position: fixed;
    top: 0;
    left: 0;
    width: 36px;
    height: 36px;
    border: 2px solid rgba(99, 102, 241, 0.5);
    border-radius: 50%;
    pointer-events: none;
    z-index: 99998;
    transform: translate(-50%, -50%);
    transition: width 0.3s ease, height 0.3s ease, border-color 0.3s ease, background 0.3s ease;
}

/* 悬停在可交互元素上时 */
.cursor-dot.hovering {
    width: 16px;
    height: 16px;
    background: #06b6d4;
}

.cursor-ring.hovering {
    width: 56px;
    height: 56px;
    border-color: rgba(6, 182, 212, 0.6);
    background: rgba(6, 182, 212, 0.08);
}

/* 点击时缩小 */
.cursor-dot.clicking {
    width: 4px;
    height: 4px;
}

.cursor-ring.clicking {
    width: 20px;
    height: 20px;
}

/* 粒子拖尾 Canvas */
.cursor-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 99997;
}

/* 移动端隐藏自定义光标 */
@media (hover: none) {
    .cursor-dot, .cursor-ring { display: none; }
    .cursor-canvas { display: none; }
}