/* ==================== 全局重置 & 基础 ==================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-start: #1E42BC;
    --primary-mid: #7855E5;
    --primary-end: #BE87EC;
    --primary-gradient: linear-gradient(135deg, var(--primary-start), var(--primary-mid), var(--primary-end));
    --bg-body: #f5f7fc;
    --bg-card: #ffffff;
    --bg-header: rgba(255, 255, 255, 0.92);
    --bg-footer: #ffffff;
    --border-light: #e6ecf5;
    --shadow-sm: 0 4px 20px rgba(30, 66, 188, 0.08);
    --shadow-lg: 0 12px 40px rgba(30, 66, 188, 0.12);
    --text-primary: #1a1a2e;
    --text-secondary: #3d3d5c;
    --text-muted: #6c6c8a;
    --radius: 12px;
    --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
    background: var(--bg-body);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

a {
    color: var(--primary-start);
    text-decoration: none;
    transition: var(--transition);
}
a:hover {
    color: var(--primary-mid);
}

::-webkit-scrollbar {
    width: 6px;
}
::-webkit-scrollbar-track {
    background: #eef2f7;
}
::-webkit-scrollbar-thumb {
    background: var(--primary-start);
    border-radius: 4px;
}

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

/* ==================== 头部 ==================== */
#site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: var(--bg-header);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-light);
    box-shadow: 0 2px 12px rgba(30, 66, 188, 0.05);
}
#site-header .header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
    gap: 12px;
}
#site-header .logo {
    font-size: 22px;
    font-weight: 700;
    letter-spacing: 0.5px;
    color: var(--text-primary);
    flex-shrink: 0;
    cursor: pointer;
}
#site-header .logo .primary {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
#site-header .nav-links {
    display: flex;
    align-items: center;
    gap: 4px;
    list-style: none;
    flex-wrap: nowrap;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
}
#site-header .nav-links::-webkit-scrollbar {
    display: none;
}
#site-header .nav-links li a {
    display: block;
    padding: 6px 14px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    transition: var(--transition);
    white-space: nowrap;
}
#site-header .nav-links li a:hover,
#site-header .nav-links li a.active {
    color: var(--primary-start);
    background: rgba(30, 66, 188, 0.08);
}
#site-header .nav-links li a.active {
    color: var(--primary-start);
    font-weight: 600;
}
#site-header .nav-links li a .badge {
    background: var(--primary-gradient);
    color: #fff;
    font-size: 10px;
    padding: 1px 8px;
    border-radius: 20px;
    margin-left: 4px;
    font-weight: 700;
}
.header-actions {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}
.btn-primary,
.btn-outline {
    padding: 6px 20px;
    border-radius: 30px;
    font-weight: 600;
    font-size: 14px;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    justify-content: center;
}
.btn-primary {
    background: var(--primary-gradient);
    color: #fff !important;
    border: none;
    box-shadow: 0 4px 14px rgba(30, 66, 188, 0.25);
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(30, 66, 188, 0.35);
    color: #fff !important;
}
.btn-primary.active {
    background: var(--primary-gradient);
    color: #fff !important;
}
.btn-outline {
    background: transparent;
    border: 1.5px solid var(--primary-start);
    color: var(--primary-start) !important;
}
.btn-outline:hover {
    background: var(--primary-gradient);
    color: #fff !important;
    border-color: transparent;
}
.btn-outline.active {
    background: var(--primary-gradient);
    color: #fff !important;
    border-color: transparent;
}
.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 4px;
    margin-left: 4px;
}
.hamburger span {
    width: 26px;
    height: 2.5px;
    background: var(--text-primary);
    border-radius: 4px;
    transition: var(--transition);
}

/* ==================== 尾部 ==================== */
#site-footer {
    background: var(--bg-footer);
    border-top: 1px solid var(--border-light);
    padding: 40px 0 24px;
    margin-top: auto;
}
#site-footer .footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 32px;
}
#site-footer .footer-grid h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 14px;
    color: var(--text-primary);
}
#site-footer .footer-grid p,
#site-footer .footer-grid a {
    color: var(--text-muted);
    font-size: 14px;
    line-height: 2;
    display: block;
}
#site-footer .footer-grid a:hover {
    color: var(--primary-start);
}
#site-footer .footer-bottom {
    border-top: 1px solid var(--border-light);
    padding-top: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 13px;
    color: var(--text-muted);
    flex-wrap: wrap;
    gap: 12px;
}
#site-footer .footer-bottom .beian a {
    color: var(--text-muted);
}
#site-footer .footer-bottom .beian a:hover {
    color: var(--primary-start);
}

/* ==================== 左右分栏登录/注册 ==================== */
.auth-page {
    flex: 1;
    display: flex;
    align-items: center;
    padding: 40px 0;
    background: linear-gradient(135deg, #f0f4ff, #faf0ff);
}
.auth-wrapper {
    display: flex;
    background: var(--bg-card);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-light);
    overflow: hidden;
    max-width: 1000px;
    margin: 0 auto;
    width: 100%;
}
.auth-left {
    flex: 1;
    padding: 48px 40px;
    background: var(--primary-gradient);
    color: #fff;
    display: flex;
    flex-direction: column;
    justify-content: center;
    min-height: 480px;
}
.auth-left h2 {
    font-size: 32px;
    font-weight: 800;
    margin-bottom: 12px;
    letter-spacing: -0.5px;
}
.auth-left .sub {
    font-size: 18px;
    opacity: 0.9;
    margin-bottom: 28px;
    line-height: 1.5;
}
.auth-left .stats {
    display: flex;
    gap: 32px;
    margin-top: 12px;
    flex-wrap: wrap;
}
.auth-left .stats .num {
    font-size: 28px;
    font-weight: 700;
    display: block;
}
.auth-left .stats .label {
    font-size: 14px;
    opacity: 0.8;
}
.auth-left .feature-list {
    margin-top: 24px;
    list-style: none;
    font-size: 15px;
}
.auth-left .feature-list li {
    padding: 6px 0;
    opacity: 0.95;
    display: flex;
    align-items: center;
    gap: 10px;
}
.auth-left .feature-list li::before {
    content: "·";
    font-size: 24px;
    font-weight: 700;
    line-height: 1;
}
.auth-right {
    flex: 1;
    padding: 48px 40px;
    min-width: 0;
}
.auth-right h2 {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 6px;
}
.auth-right .sub {
    color: var(--text-muted);
    font-size: 15px;
    margin-bottom: 28px;
}
.auth-right .form-group {
    margin-bottom: 18px;
}
.auth-right .form-group label {
    display: block;
    font-weight: 500;
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 5px;
}
.auth-right .form-group input {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-body);
    border: 1px solid var(--border-light);
    border-radius: 8px;
    font-size: 15px;
    color: var(--text-primary);
    transition: var(--transition);
    outline: none;
}
.auth-right .form-group input:focus {
    border-color: var(--primary-start);
    box-shadow: 0 0 0 3px rgba(30, 66, 188, 0.10);
}
.auth-right .form-group .helper {
    font-size: 13px;
    color: var(--text-muted);
    margin-top: 4px;
}
.auth-right .form-group .checkbox-wrapper {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: 4px;
}
.auth-right .form-group .checkbox-wrapper input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--primary-start);
    cursor: pointer;
    flex-shrink: 0;
}
.auth-right .form-group .checkbox-wrapper label {
    font-weight: 400;
    font-size: 14px;
    color: var(--text-secondary);
    cursor: pointer;
    margin-bottom: 0;
}
.auth-right .form-group .checkbox-wrapper a {
    color: var(--primary-start);
    font-weight: 500;
}
.auth-right .form-group .checkbox-wrapper a:hover {
    color: var(--primary-mid);
}
.auth-right .form-error {
    color: #d1453b;
    font-size: 13px;
    margin-top: 4px;
    display: none;
}
.auth-right .btn-primary {
    width: 100%;
    justify-content: center;
    padding: 14px;
    font-size: 16px;
    margin-top: 6px;
}
.auth-right .auth-footer {
    text-align: center;
    margin-top: 24px;
    font-size: 14px;
    color: var(--text-muted);
}
.auth-right .auth-footer a {
    font-weight: 600;
    color: var(--primary-start);
}
.auth-right .auth-footer a:hover {
    color: var(--primary-mid);
}

/* ==================== 响应式 ==================== */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }
    #site-header .nav-links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: var(--bg-header);
        backdrop-filter: blur(16px);
        padding: 20px 24px;
        border-bottom: 1px solid var(--border-light);
        gap: 4px;
        box-shadow: 0 8px 24px rgba(0,0,0,0.05);
        overflow-x: visible;
        max-height: calc(100vh - 72px);
        overflow-y: auto;
    }
    #site-header .nav-links.open {
        display: flex;
    }
    #site-header .nav-links li a {
        padding: 12px 16px;
        font-size: 15px;
        white-space: normal;
    }
    .auth-wrapper {
        flex-direction: column;
        margin: 0 16px;
    }
    .auth-left {
        padding: 32px 24px;
        min-height: auto;
        border-radius: var(--radius) var(--radius) 0 0;
    }
    .auth-left h2 {
        font-size: 26px;
    }
    .auth-right {
        padding: 32px 24px;
    }
    #site-footer .footer-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    #site-footer .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}
/* ==================== 协议/政策页面通用 ==================== */
.legal-page {
    flex: 1;
    padding: 48px 0 60px;
    background: var(--bg-body);
}

.legal-container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 24px;
}

.legal-card {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 48px 56px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-light);
}

.legal-card .page-header {
    margin-bottom: 32px;
    padding-bottom: 20px;
    border-bottom: 2px solid var(--border-light);
}

.legal-card .page-header h1 {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.5px;
}

.legal-card .page-header .meta {
    color: var(--text-muted);
    font-size: 14px;
    margin-top: 6px;
}

.legal-card .page-header .meta span {
    margin-right: 20px;
}

.legal-card h2 {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    margin: 28px 0 12px;
    padding-bottom: 6px;
    border-bottom: 1px solid var(--border-light);
}

.legal-card h3 {
    font-size: 17px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 20px 0 8px;
}

.legal-card p {
    color: var(--text-secondary);
    font-size: 15px;
    line-height: 1.9;
    margin-bottom: 12px;
}

.legal-card ul {
    color: var(--text-secondary);
    font-size: 15px;
    line-height: 1.9;
    padding-left: 24px;
    margin-bottom: 12px;
}

.legal-card ul li {
    margin-bottom: 4px;
}

.legal-card .highlight-box {
    background: var(--bg-body);
    border-left: 4px solid var(--primary-start);
    padding: 16px 20px;
    border-radius: 0 var(--radius) var(--radius) 0;
    margin: 16px 0;
}

.legal-card .highlight-box p {
    margin-bottom: 0;
    color: var(--text-secondary);
    font-size: 14px;
}

.legal-card .contact-block {
    background: var(--bg-body);
    border-radius: var(--radius);
    padding: 20px 24px;
    margin: 24px 0 0;
}

.legal-card .contact-block p {
    margin-bottom: 4px;
    font-size: 14px;
}

@media (max-width: 768px) {
    .legal-card {
        padding: 28px 20px;
    }
    .legal-card .page-header h1 {
        font-size: 26px;
    }
}