/* ==========================================================
   文章酱 - 全局样式
   前端主题色: 科技蓝 #3B82F6 | 辅助淡蓝 #DBEAFE
   风格: 商务 · 现代 · 优雅 · 精致
   ========================================================== */

/* ==========================================================
   阿里巴巴普惠体 2.0（免费商用授权）自托管字体
   字重: 400 Regular / 500 Medium / 600 SemiBold / 700 Bold / 800 ExtraBold
   ========================================================== */
@font-face { font-family: 'Alibaba PuHuiTi 2.0'; src: url('../fonts/AlibabaPuHuiTi_2_55_Regular.woff2') format('woff2'); font-weight: 400; font-style: normal; font-display: swap; }
@font-face { font-family: 'Alibaba PuHuiTi 2.0'; src: url('../fonts/AlibabaPuHuiTi_2_65_Medium.woff2') format('woff2'); font-weight: 500; font-style: normal; font-display: swap; }
@font-face { font-family: 'Alibaba PuHuiTi 2.0'; src: url('../fonts/AlibabaPuHuiTi_2_75_SemiBold.woff2') format('woff2'); font-weight: 600; font-style: normal; font-display: swap; }
@font-face { font-family: 'Alibaba PuHuiTi 2.0'; src: url('../fonts/AlibabaPuHuiTi_2_85_Bold.woff2') format('woff2'); font-weight: 700; font-style: normal; font-display: swap; }
@font-face { font-family: 'Alibaba PuHuiTi 2.0'; src: url('../fonts/AlibabaPuHuiTi_2_95_ExtraBold.woff2') format('woff2'); font-weight: 800; font-style: normal; font-display: swap; }

:root {
    --primary: #3B82F6;
    --primary-dark: #2563EB;
    --primary-light: #60A5FA;
    --accent: #DBEAFE;
    --accent-deep: #93C5FD;
    --warm: #BFDBFE;
    --warm-deep: #60A5FA;
    --bg: #F5F8FC;
    --card: #ffffff;
    --text: #1e293b;
    --text-light: #7a8794;
    --border: #E2E8F0;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --radius: 12px;
    --shadow: 0 6px 24px rgba(59, 130, 246, 0.10);
}

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

body {
    font-family: 'Alibaba PuHuiTi 2.0', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
    font-size: 16px;
    color: var(--text);
    background: var(--bg);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-dark); }

img { max-width: 100%; vertical-align: middle; }

/* ============ 按钮 ============ */
.btn {
    display: inline-block;
    padding: 10px 22px;
    border: 1px solid transparent;
    border-radius: 8px;
    font-size: 14px;
    cursor: pointer;
    text-align: center;
    transition: all .2s ease;
    user-select: none;
}
.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: #fff;
    box-shadow: 0 4px 14px rgba(59, 130, 246, 0.25);
}
.btn-primary:hover { opacity: .92; color: #fff; }
.btn-accent {
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-deep) 100%);
    color: #1e3a8a;
}
.btn-accent:hover { opacity: .92; color: #1e3a8a; }
.btn-outline {
    border-color: var(--primary);
    color: var(--primary);
    background: transparent;
}
.btn-outline:hover { background: rgba(59, 130, 246, .06); }
.btn-plain {
    background: #EAF0F7;
    color: var(--text);
}
.btn-plain:hover { background: #DFE8F2; }
.btn-block { display: block; width: 100%; }
.btn-lg { padding: 13px 28px; font-size: 15px; }
.btn:disabled { opacity: .55; cursor: not-allowed; }

/* ============ 表单 ============ */
.form-item { margin-bottom: 20px; }
.form-label {
    display: block;
    margin-bottom: 8px;
    font-size: 13px;
    color: var(--text-light);
}
.form-control {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 14px;
    background: #ffffff;
    color: var(--text);
    transition: border-color .2s, box-shadow .2s;
    outline: none;
}
.form-control:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.12);
}
.form-control::placeholder { color: #b3bcc5; }
.form-tip { font-size: 12px; color: var(--text-light); margin-top: 6px; }
.form-error { color: var(--danger); font-size: 13px; margin-top: 6px; }

.input-group { display: flex; gap: 10px; }
.input-group .form-control { flex: 1; }
.input-group .btn { flex-shrink: 0; white-space: nowrap; }

/* ============ 提示条 ============ */
.alert {
    padding: 11px 16px;
    border-radius: 8px;
    font-size: 13px;
    margin-bottom: 16px;
    display: none;
}
.alert.show { display: block; }
.alert-error { background: #fdeceb; color: var(--danger); border: 1px solid #f6c9c7; }
.alert-success { background: #e7f6ee; color: var(--success); border: 1px solid #bfe6d0; }
.alert-info { background: #e9f2fa; color: var(--primary); border: 1px solid #c3ddf0; }

/* ============ 认证页面 ============ */
.auth-page {
    min-height: 100vh;
    display: flex;
    background:
        radial-gradient(1200px 600px at 85% -10%, rgba(96, 165, 250, 0.18), transparent 60%),
        radial-gradient(900px 500px at -10% 110%, rgba(59, 130, 246, 0.12), transparent 60%),
        linear-gradient(150deg, #EFF6FF 0%, #F8FAFC 100%);
}
.auth-panel {
    width: 440px;
    margin: auto;
    padding: 40px 44px;
    background: var(--card);
    border-radius: 18px;
    box-shadow: 0 20px 60px rgba(59, 130, 246, 0.12);
}
.auth-brand { text-align: center; margin-bottom: 28px; }
.auth-logo {
    width: 58px;
    height: 58px;
    border-radius: 14px;
    object-fit: cover;
    box-shadow: 0 6px 16px rgba(59, 130, 246, 0.2);
}
.auth-title {
    margin-top: 12px;
    font-size: 22px;
    font-weight: 700;
    color: var(--primary);
    letter-spacing: 2px;
}
.auth-subtitle { font-size: 13px; color: var(--text-light); margin-top: 4px; }
.auth-footer { text-align: center; margin-top: 22px; font-size: 13px; color: var(--text-light); }
.auth-footer a { color: var(--primary); font-weight: 600; }

/* 倒计时按钮 */
.countdown-btn { min-width: 108px; }

/* ============ 导航 ============ */
.site-nav {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
}
.nav-inner {
    max-width: 1080px;
    margin: 0 auto;
    padding: 0 16px;
    height: 60px;
    display: flex;
    align-items: center;
    gap: 28px;
}
.nav-brand { display: flex; align-items: center; gap: 8px; font-size: 19px; font-weight: 800; color: var(--primary); letter-spacing: 1px; }
.nav-brand img { width: 32px; height: 32px; border-radius: 8px; }
.nav-links { display: flex; gap: 22px; flex: 1; }
.nav-links a { color: var(--text); font-size: 14px; font-weight: 500; padding: 6px 2px; border-bottom: 2px solid transparent; transition: all .2s; }
.nav-links a:hover { color: var(--primary); }
.nav-links a.active { color: var(--primary); border-bottom-color: var(--primary); }
.nav-user { display: flex; align-items: center; gap: 14px; position: relative; }
.nav-balance {
    background: linear-gradient(135deg, var(--accent), var(--accent-deep));
    color: #1e3a8a;
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
}
.nav-login { color: var(--primary); font-weight: 600; }
.nav-register {
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: #fff;
    padding: 7px 18px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.25);
}
.nav-register:hover { color: #fff; opacity: .92; }
.nav-avatar-wrap { position: relative; }
.nav-avatar {
    width: 34px; height: 34px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: #fff;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 15px;
    cursor: pointer;
    user-select: none;
}
.nav-dropdown {
    position: absolute;
    right: 0;
    top: calc(100% + 10px);
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    min-width: 140px;
    padding: 6px;
    display: none;
    z-index: 120;
}
.nav-avatar-wrap:hover .nav-dropdown { display: block; }
.nav-dropdown a {
    display: block;
    padding: 9px 14px;
    border-radius: 7px;
    font-size: 13px;
    color: var(--text);
}
.nav-dropdown a:hover { background: #f2f6f9; color: var(--primary); }

/* ============ 页脚 ============ */
.site-footer {
    background: #1c2430;
    color: #9aa7b4;
    padding: 34px 0;
    margin-top: 40px;
}
.site-footer .container { text-align: center; }
.footer-brand { display: flex; align-items: center; justify-content: center; gap: 8px; color: #fff; font-size: 17px; font-weight: 700; margin-bottom: 12px; }
.footer-brand img { width: 26px; height: 26px; border-radius: 6px; }
.footer-links { font-size: 13px; margin-bottom: 8px; }
.footer-links a { color: #c3ccd6; margin: 0 6px; }
.footer-links a:hover { color: var(--primary-light); }
.footer-copy { font-size: 12px; }

/* ============ 首页 ============ */
.home-hero {
    background:
        radial-gradient(900px 400px at 90% -10%, rgba(96, 165, 250, 0.25), transparent 60%),
        radial-gradient(700px 380px at -10% 110%, rgba(59, 130, 246, 0.15), transparent 60%),
        linear-gradient(140deg, #EFF6FF 0%, #F8FAFC 100%);
    padding: 70px 0 90px;
    text-align: center;
}
.home-hero h1 { font-size: 34px; color: var(--primary); font-weight: 800; letter-spacing: 2px; }
.home-hero .sub { font-size: 16px; color: var(--text-light); margin-top: 12px; }
.home-hero .hero-cta { margin-top: 26px; display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

.service-cards { margin-top: -46px; padding-bottom: 50px; }
.service-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.service-card {
    background: #fff;
    border-radius: 14px;
    box-shadow: var(--shadow);
    padding: 24px 20px;
    text-align: center;
    transition: transform .2s, box-shadow .2s;
    cursor: pointer;
}
.service-card:hover { transform: translateY(-4px); box-shadow: 0 12px 32px rgba(59, 130, 246, 0.14); }
.service-card .sc-icon {
    width: 52px; height: 52px;
    border-radius: 13px;
    margin: 0 auto 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: #fff;
}
.service-card h3 { font-size: 16px; color: var(--text); }
.service-card p { font-size: 12px; color: var(--text-light); margin-top: 6px; line-height: 1.6; }

.section-title { text-align: center; font-size: 22px; font-weight: 800; color: var(--text); margin: 44px 0 24px; }
.section-title span { color: var(--primary); }

.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.feature-item {
    background: #fff;
    border-radius: 12px;
    padding: 22px;
    box-shadow: var(--shadow);
}
.feature-item .fi-icon { font-size: 26px; margin-bottom: 10px; }
.feature-item h4 { font-size: 15px; color: var(--text); margin-bottom: 6px; }
.feature-item p { font-size: 13px; color: var(--text-light); line-height: 1.7; }

@media (max-width: 900px) {
    .service-grid { grid-template-columns: repeat(2, 1fr); }
    .feature-grid { grid-template-columns: 1fr; }
    .nav-links { display: none; }
}
@media (max-width: 520px) {
    .service-grid { grid-template-columns: 1fr; }
    .home-hero h1 { font-size: 26px; }
}