:root {
    --color-primary: #0052D9;
    --color-primary-light: #E6F0FF;
    --color-primary-dark: #003A99;
    --color-bg: #F5F7FA;
    --color-text: #1F2933;
    --color-muted: #6B7280;
    --color-border: #E5E7EB;
    --color-white: #FFFFFF;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.6;
}

a {
    color: inherit;
    text-decoration: none;
}

.container {
    width: 100%;
    max-width: 1120px;
    margin: 0 auto;
    padding: 0 16px;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.96);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 0;
}

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

.logo-mark {
    width: 36px;
    height: 36px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: var(--color-white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 20px;
}

.logo-text {
    display: flex;
    flex-direction: column;
}

.logo-title {
    font-size: 16px;
    font-weight: 600;
}

.logo-subtitle {
    font-size: 12px;
    color: var(--color-muted);
}

.nav {
    display: flex;
    align-items: center;
    gap: 24px;
    font-size: 14px;
}

.nav a {
    position: relative;
    padding-bottom: 4px;
    color: var(--color-muted);
}

.nav a::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: 0;
    width: 0;
    height: 2px;
    background: var(--color-primary);
    transition: width 0.2s ease;
}

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

.nav a:hover::after {
    width: 100%;
}

.hero {
    padding: 72px 0 56px;
    background: radial-gradient(circle at top left, #E6F0FF 0, #F5F7FA 40%, #FFFFFF 100%);
}

.hero-inner {
    display: grid;
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    gap: 40px;
    align-items: center;
}

.hero-content h1 {
    font-size: 30px;
    line-height: 1.3;
    margin: 0 0 16px;
}

.hero-content p {
    margin: 0 0 20px;
    color: var(--color-muted);
    font-size: 14px;
}

.hero-actions {
    display: flex;
    gap: 12px;
    margin-bottom: 16px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 8px 18px;
    border-radius: 999px;
    font-size: 14px;
    border: 1px solid transparent;
    cursor: pointer;
    transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease;
}

.btn-primary {
    background: var(--color-primary);
    color: var(--color-white);
    box-shadow: 0 6px 18px rgba(0, 82, 217, 0.22);
}

.btn-primary:hover {
    background: var(--color-primary-dark);
}

.btn-outline {
    background: transparent;
    color: var(--color-primary);
    border-color: var(--color-primary);
}

.btn-outline:hover {
    background: var(--color-primary-light);
}

.btn-block {
    width: 100%;
}

.hero-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    font-size: 12px;
    color: var(--color-muted);
}

.hero-tags span {
    padding: 4px 10px;
    border-radius: 999px;
    background: rgba(0, 82, 217, 0.06);
}

.hero-panel {
    display: grid;
    grid-template-columns: 1fr;
    gap: 12px;
}

.stat-card {
    padding: 14px 16px;
    border-radius: 12px;
    background: var(--color-white);
    border: 1px solid rgba(0, 82, 217, 0.1);
    box-shadow: 0 8px 18px rgba(15, 23, 42, 0.06);
}

.stat-number {
    font-size: 22px;
    font-weight: 600;
    color: var(--color-primary-dark);
    margin-bottom: 4px;
}

.stat-label {
    font-size: 12px;
    color: var(--color-muted);
}

.section {
    padding: 60px 0;
    background: var(--color-white);
}

.section-light {
    background: #F9FAFB;
}

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

.section-header h2 {
    margin: 0 0 6px;
    font-size: 22px;
}

.section-header p {
    margin: 0;
    font-size: 12px;
    letter-spacing: 2px;
    color: var(--color-muted);
}

.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 32px;
    align-items: flex-start;
}

.info-list {
    list-style: none;
    padding: 0;
    margin: 0;
    border-radius: 12px;
    border: 1px solid var(--color-border);
    background: var(--color-white);
}

.info-list li {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    padding: 10px 14px;
    font-size: 13px;
}

.info-list li + li {
    border-top: 1px solid var(--color-border);
}

.info-list span:first-child {
    color: var(--color-muted);
}

.info-list span:last-child {
    text-align: right;
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
}

.card {
    padding: 18px 16px;
    border-radius: 12px;
    border: 1px solid var(--color-border);
    background: var(--color-white);
    font-size: 13px;
}

.card h3 {
    margin: 0 0 8px;
    font-size: 16px;
}

.card p {
    margin: 0 0 10px;
    color: var(--color-muted);
}

.card ul {
    margin: 0;
    padding-left: 18px;
    color: var(--color-muted);
}

.adv-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
}

.adv-item {
    padding: 18px 16px;
    border-radius: 12px;
    border: 1px solid var(--color-border);
    background: var(--color-white);
    font-size: 13px;
}

.adv-item h3 {
    margin: 0 0 6px;
    font-size: 16px;
}

.adv-item p {
    margin: 0;
    color: var(--color-muted);
}

.process-steps {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
}

.process-steps li {
    padding: 18px 16px;
    border-radius: 12px;
    border: 1px solid var(--color-border);
    background: var(--color-white);
    font-size: 13px;
}

.process-steps h3 {
    margin: 0 0 6px;
    font-size: 15px;
    color: var(--color-primary-dark);
}

.process-steps p {
    margin: 0;
    color: var(--color-muted);
}

.news-placeholder {
    padding: 20px 18px;
    border-radius: 12px;
    border: 1px dashed var(--color-border);
    background: #F9FAFB;
    font-size: 13px;
    color: var(--color-muted);
}

.contact-section {
    background: linear-gradient(180deg, #FFFFFF 0, #F3F4F6 100%);
}

.contact-tip {
    margin-top: 12px;
    font-size: 13px;
    color: var(--color-muted);
}

.contact-form {
    padding: 18px 16px;
    border-radius: 12px;
    border: 1px solid var(--color-border);
    background: var(--color-white);
    font-size: 13px;
}

.form-row {
    margin-bottom: 12px;
}

.form-row label {
    display: block;
    margin-bottom: 4px;
    font-size: 13px;
}

.form-row input,
.form-row textarea {
    width: 100%;
    padding: 8px 10px;
    border-radius: 8px;
    border: 1px solid var(--color-border);
    font-family: inherit;
    font-size: 13px;
    resize: vertical;
}

.form-row input:focus,
.form-row textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 1px rgba(0, 82, 217, 0.15);
}

.form-note {
    margin-top: 8px;
    font-size: 12px;
    color: var(--color-muted);
}

.site-footer {
    border-top: 1px solid var(--color-border);
    background: #111827;
    color: #E5E7EB;
    padding: 20px 0;
    font-size: 12px;
}

.footer-inner {
    display: flex;
    justify-content: space-between;
    gap: 24px;
}

.mini-logo .logo-mark {
    background: rgba(249, 250, 251, 0.12);
}

.mini-logo .logo-title {
    color: #F9FAFB;
}

.mini-logo .logo-subtitle {
    color: #9CA3AF;
}

.footer-copy,
.footer-icp {
    margin: 4px 0;
    color: #9CA3AF;
}

.footer-right {
    max-width: 360px;
    color: #D1D5DB;
}

.back-to-top {
    position: fixed;
    right: 16px;
    bottom: 24px;
    width: 40px;
    height: 40px;
    border-radius: 999px;
    border: none;
    background: rgba(17, 24, 39, 0.8);
    color: #F9FAFB;
    font-size: 18px;
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    box-shadow: 0 10px 25px rgba(15, 23, 42, 0.4);
}

.back-to-top:hover {
    background: rgba(17, 24, 39, 1);
}

@media (max-width: 960px) {
    .hero-inner {
        grid-template-columns: minmax(0, 1fr);
    }

    .hero {
        padding-top: 64px;
    }

    .nav {
        display: none;
    }
}

@media (max-width: 768px) {
    .grid-2,
    .card-grid,
    .adv-grid,
    .process-steps {
        grid-template-columns: 1fr;
    }

    .section {
        padding: 40px 0;
    }

    .site-footer {
        text-align: left;
    }

    .footer-inner {
        flex-direction: column;
    }
}