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

body {
    font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
    background: #fbfdff;
    color: #1a2c3e;
    line-height: 1.5;
    scroll-behavior: smooth;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

/* 导航栏 */
.navbar {
    padding: 20px 0;
    background: rgba(255, 255, 255, 0.96);
    backdrop-filter: blur(2px);
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid #eef2f6;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.logo {
    font-size: 1.8rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    background: linear-gradient(135deg, #0b2b44, #1f6392);
    background-clip: text;
    -webkit-background-clip: text;
    color: transparent;
}

.logo span {
    color: #1a6d9e;
    background: none;
    -webkit-background-clip: unset;
    background-clip: unset;
}

.nav-links {
    display: flex;
    gap: 32px;
    list-style: none;
}

.nav-links a {
    text-decoration: none;
    font-weight: 500;
    color: #2c4b66;
    transition: 0.2s;
    font-size: 1rem;
}

.nav-links a:hover {
    color: #1e7fb4;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 26px;
    border-radius: 40px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.25s;
    cursor: pointer;
    border: none;
    font-size: 0.95rem;
}

.btn-primary {
    background: #1a6d9e;
    color: white;
    box-shadow: 0 4px 8px rgba(26, 109, 158, 0.2);
}

.btn-primary:hover {
    background: #0f547d;
    transform: translateY(-2px);
    box-shadow: 0 8px 18px rgba(26, 109, 158, 0.25);
}

.btn-outline {
    border: 1.5px solid #1a6d9e;
    background: transparent;
    color: #1a6d9e;
}

.btn-outline:hover {
    background: #eaf4fc;
    border-color: #0f5a84;
}

/* Hero 区域 */
.hero {
    padding: 70px 0 50px;
    background: linear-gradient(145deg, #ffffff 0%, #f5faff 100%);
}

.hero-grid {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 40px;
    justify-content: space-between;
}

.hero-content {
    flex: 1;
    min-width: 280px;
}

.hero-badge {
    background: #e1f0fe;
    color: #1a6d9e;
    display: inline-block;
    padding: 5px 14px;
    border-radius: 30px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 20px;
}

.hero-content h1 {
    font-size: 3rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 20px;
    color: #0a2a3e;
}

.hero-content p {
    font-size: 1.2rem;
    color: #2d4b6e;
    margin-bottom: 30px;
    max-width: 550px;
}

.platform-badge {
    display: flex;
    gap: 18px;
    margin: 25px 0 20px;
    flex-wrap: wrap;
}

.platform-item {
    background: white;
    border-radius: 60px;
    padding: 6px 18px;
    font-weight: 500;
    box-shadow: 0 2px 6px rgba(0,0,0,0.03);
    border: 1px solid #dce5ed;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.platform-item i {
    color: #1a6d9e;
    font-size: 1.1rem;
}

.hero-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    margin-top: 12px;
}

.hero-image {
    flex: 0.8;
    min-width: 240px;
    text-align: center;
}

.hero-image i {
    font-size: 12rem;
    color: #cfe3f5;
    filter: drop-shadow(0 8px 12px rgba(0,0,0,0.05));
}

.section {
    padding: 80px 0;
}

.section-title {
    text-align: center;
    font-size: 2.3rem;
    font-weight: 700;
    margin-bottom: 16px;
    color: #0f2d3f;
}

.section-sub {
    text-align: center;
    color: #517e9c;
    max-width: 700px;
    margin: 0 auto 50px;
    font-size: 1.1rem;
}

.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
}

.service-card {
    background: white;
    border-radius: 28px;
    padding: 32px 28px;
    box-shadow: 0 12px 28px rgba(0, 0, 0, 0.04);
    transition: all 0.3s ease;
    border: 1px solid #eef2f8;
}

.service-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 24px 40px rgba(0, 0, 0, 0.08);
    border-color: #cde3f2;
}

.card-icon {
    font-size: 2.8rem;
    color: #1a6d9e;
    margin-bottom: 24px;
}

.service-card h3 {
    font-size: 1.6rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.service-card p {
    color: #3a5b77;
    margin-bottom: 20px;
    line-height: 1.5;
}

.card-tag {
    display: inline-block;
    background: #eef3fc;
    padding: 4px 12px;
    border-radius: 30px;
    font-size: 0.8rem;
    font-weight: 500;
    color: #1a6d9e;
}

.custom-section {
    background: #f0f6fd;
    border-radius: 48px;
    margin: 20px auto;
    padding: 48px 40px;
}

.flex-features {
    display: flex;
    flex-wrap: wrap;
    gap: 40px;
    justify-content: space-between;
    align-items: center;
}

.features-text {
    flex: 1.2;
}

.features-text h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 20px;
}

.features-text ul {
    list-style: none;
    margin-top: 20px;
}

.features-text li {
    margin-bottom: 14px;
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.05rem;
}

.features-text li i {
    color: #1a6d9e;
    font-size: 1.3rem;
    width: 28px;
}

.features-stats {
    flex: 0.8;
    background: white;
    border-radius: 32px;
    padding: 28px;
    box-shadow: 0 12px 20px rgba(0,0,0,0.03);
    text-align: center;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    color: #1a6d9e;
}

.contact-area {
    background: linear-gradient(115deg, #0c3145 0%, #134b6b 100%);
    border-radius: 40px;
    padding: 56px 48px;
    color: white;
    margin: 30px 0 20px;
}

.contact-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 40px;
    justify-content: space-between;
    align-items: center;
}

.contact-info h3 {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 20px;
}

.contact-detail {
    margin: 24px 0;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.contact-detail p {
    display: flex;
    align-items: center;
    gap: 14px;
    font-size: 1.1rem;
}

.contact-detail i {
    width: 28px;
    font-size: 1.3rem;
}

.btn-light {
    background: white;
    color: #134b6b;
    border-radius: 40px;
    padding: 12px 28px;
    font-weight: 700;
    display: inline-block;
    transition: 0.2s;
}

.btn-light:hover {
    background: #eef3fc;
    transform: translateY(-2px);
}

.contact-form-demo {
    background: rgba(255,255,255,0.1);
    backdrop-filter: blur(4px);
    border-radius: 32px;
    padding: 28px;
    width: 100%;
    max-width: 340px;
}

.contact-form-demo p {
    margin-bottom: 16px;
    font-weight: 500;
}

.demo-input {
    background: white;
    border-radius: 60px;
    padding: 12px 18px;
    border: none;
    width: 100%;
    margin-bottom: 12px;
    font-size: 0.9rem;
}

textarea.demo-input {
    border-radius: 24px;
    resize: vertical;
}

/* 滑块验证样式 */
.slider-container {
    background: #f0f2f5;
    border-radius: 40px;
    padding: 4px;
    margin-bottom: 12px;
    position: relative;
    cursor: pointer;
    user-select: none;
}
.slider-track {
    background: #e4e7eb;
    border-radius: 40px;
    height: 44px;
    position: relative;
    overflow: hidden;
}
.slider-thumb {
    position: absolute;
    top: 0;
    left: 0;
    width: 44px;
    height: 44px;
    background: white;
    border-radius: 50%;
    box-shadow: 0 2px 8px rgba(0,0,0,0.15);
    cursor: grab;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: left 0.05s linear;
    z-index: 2;
}
.slider-thumb:active {
    cursor: grabbing;
}
.slider-progress {
    position: absolute;
    left: 0;
    top: 0;
    height: 44px;
    background: #1a6d9e;
    border-radius: 40px;
    width: 0%;
    transition: width 0.05s linear;
}
.slider-text {
    position: absolute;
    left: 0;
    right: 0;
    text-align: center;
    line-height: 44px;
    color: #6c7a8a;
    font-size: 0.85rem;
    pointer-events: none;
    z-index: 1;
}
.slider-container.success .slider-progress {
    background: #28a745;
}
.slider-container.success .slider-thumb {
    background: #28a745;
    color: white;
}
.slider-container.success .slider-text {
    color: white;
}
.slider-error {
    font-size: 0.7rem;
    color: #ffc9c9;
    margin-top: 4px;
    padding-left: 12px;
}

.footer {
    text-align: center;
    padding: 36px 0 28px;
    border-top: 1px solid #e2e9f0;
    color: #4d6f8c;
    font-size: 0.9rem;
}

.record-number {
    margin-top: 10px;
    font-size: 0.8rem;
    color: #6c8eab;
}

@media (max-width: 768px) {
    .container {
        padding: 0 20px;
    }
    .hero-content h1 {
        font-size: 2.3rem;
    }
    .section-title {
        font-size: 1.9rem;
    }
    .custom-section {
        padding: 32px 24px;
    }
    .contact-area {
        padding: 36px 24px;
    }
}

@media (max-width: 550px) {
    .nav-container {
        flex-direction: column;
        align-items: flex-start;
    }
    .hero-buttons .btn {
        width: 100%;
        justify-content: center;
    }
}