/* ============================================================
   Pipi Authorization Center — Modern Design System v1.0
   现代科技浅色风 | 独立作用域 .pp-* | 不影响后台旧样式
   ============================================================ */

/* ---------- 1. Design Tokens ---------- */
:root {
    /* 色彩 */
    --pp-primary: #2563eb;
    --pp-primary-dark: #1d4ed8;
    --pp-primary-light: #dbeafe;
    --pp-primary-50: #eff6ff;
    --pp-accent: #0ea5e9;
    --pp-success: #16a34a;
    --pp-success-light: #dcfce7;
    --pp-warning: #d97706;
    --pp-warning-light: #fef3c7;
    --pp-danger: #dc2626;
    --pp-danger-light: #fee2e2;
    --pp-ink: #0f172a;
    --pp-text: #334155;
    --pp-muted: #64748b;
    --pp-line: #e2e8f0;
    --pp-bg: #f6f8fc;
    --pp-card: #ffffff;

    /* 字体 */
    --pp-font: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
    --pp-fs-xs: 12px;
    --pp-fs-sm: 14px;
    --pp-fs-md: 16px;
    --pp-fs-lg: 20px;
    --pp-fs-xl: 28px;
    --pp-fs-hero: clamp(30px, 5.5vw, 48px);

    /* 间距 (8pt 网格) */
    --pp-sp-1: 4px;
    --pp-sp-2: 8px;
    --pp-sp-3: 16px;
    --pp-sp-4: 24px;
    --pp-sp-5: 32px;
    --pp-sp-6: 48px;
    --pp-sp-7: 64px;

    /* 圆角与阴影 */
    --pp-radius-sm: 8px;
    --pp-radius: 12px;
    --pp-radius-lg: 20px;
    --pp-shadow-sm: 0 1px 2px rgba(15, 23, 42, .06);
    --pp-shadow-md: 0 4px 16px rgba(15, 23, 42, .08);
    --pp-shadow-lg: 0 24px 64px rgba(15, 23, 42, .12);

    /* 动效 */
    --pp-ease: cubic-bezier(.22, .61, .36, 1);
    --pp-fast: .18s;
    --pp-normal: .32s;
}

/* ---------- 2. Reset（仅作用于新页面作用域） ---------- */
.pp-body {
    margin: 0;
    padding: 0;
    min-height: 100vh;
    font-family: var(--pp-font);
    font-size: var(--pp-fs-md);
    line-height: 1.6;
    color: var(--pp-text);
    background: var(--pp-bg);
    -webkit-font-smoothing: antialiased;
    text-align: left;
}

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

.pp-body img { max-width: 100%; }
.pp-body a { color: var(--pp-primary); text-decoration: none; }
.pp-body a:hover { color: var(--pp-primary-dark); }

/* ---------- 3. 可访问性 ---------- */
.pp-skip-link {
    position: absolute;
    left: -9999px;
    top: 0;
    z-index: 999;
    padding: var(--pp-sp-2) var(--pp-sp-3);
    background: var(--pp-primary);
    color: #fff;
    border-radius: 0 0 var(--pp-radius-sm) 0;
}
.pp-skip-link:focus { left: 0; color: #fff; }

.pp-visually-hidden {
    position: absolute !important;
    width: 1px; height: 1px;
    margin: -1px; padding: 0;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap; border: 0;
}

/* 键盘焦点可见 */
.pp-body a:focus-visible,
.pp-body button:focus-visible,
.pp-body input:focus-visible,
.pp-body [tabindex]:focus-visible {
    outline: 3px solid rgba(37, 99, 235, .45);
    outline-offset: 2px;
    border-radius: var(--pp-radius-sm);
}

/* 减少动态偏好 */
@media (prefers-reduced-motion: reduce) {
    .pp-body *, .pp-body *::before, .pp-body *::after {
        animation-duration: .01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: .01ms !important;
    }
}

/* ---------- 4. 布局 ---------- */
.pp-site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(255, 255, 255, .86);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--pp-line);
}
.pp-nav {
    max-width: 1120px;
    margin: 0 auto;
    padding: 0 var(--pp-sp-4);
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--pp-sp-3);
}
.pp-brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-size: 18px;
    font-weight: 700;
    color: var(--pp-ink);
}
.pp-brand:hover { color: var(--pp-ink); }
.pp-brand-badge {
    width: 34px; height: 34px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
    color: #fff;
    background: linear-gradient(135deg, var(--pp-primary), var(--pp-accent));
    box-shadow: 0 6px 14px rgba(37, 99, 235, .28);
    flex: none;
}
.pp-nav-links {
    display: flex;
    align-items: center;
    gap: var(--pp-sp-2);
    margin: 0; padding: 0;
    list-style: none;
}
.pp-nav-links a {
    display: inline-block;
    padding: 8px 14px;
    border-radius: 999px;
    font-size: var(--pp-fs-sm);
    color: var(--pp-text);
    transition: background var(--pp-fast) var(--pp-ease), color var(--pp-fast) var(--pp-ease);
}
.pp-nav-links a:hover { background: var(--pp-primary-50); color: var(--pp-primary); }
.pp-nav-links a.is-active {
    background: var(--pp-primary-light);
    color: var(--pp-primary-dark);
    font-weight: 600;
}

.pp-main { display: block; }
.pp-container {
    max-width: 1120px;
    margin: 0 auto;
    padding: 0 var(--pp-sp-4);
}
.pp-section { padding: var(--pp-sp-7) 0; }

/* ---------- 5. Hero（首页核心价值区） ---------- */
.pp-hero {
    position: relative;
    overflow: hidden;
    padding: clamp(48px, 9vw, 96px) 0 var(--pp-sp-7);
    background:
        radial-gradient(720px 320px at 88% -10%, rgba(14, 165, 233, .16), transparent 60%),
        radial-gradient(680px 380px at -8% 0%, rgba(37, 99, 235, .14), transparent 55%),
        linear-gradient(180deg, #fbfdff 0%, var(--pp-bg) 100%);
}
.pp-hero-grid {
    display: grid;
    grid-template-columns: 1.05fr .95fr;
    gap: var(--pp-sp-6);
    align-items: center;
}
.pp-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    border-radius: 999px;
    background: var(--pp-primary-50);
    border: 1px solid var(--pp-primary-light);
    color: var(--pp-primary-dark);
    font-size: var(--pp-fs-xs);
    font-weight: 600;
    letter-spacing: .06em;
}
.pp-eyebrow::before {
    content: "";
    width: 7px; height: 7px;
    border-radius: 50%;
    background: var(--pp-success);
    box-shadow: 0 0 0 4px rgba(22, 163, 74, .16);
}
.pp-hero-title {
    margin: var(--pp-sp-3) 0 var(--pp-sp-3);
    font-size: var(--pp-fs-hero);
    line-height: 1.18;
    font-weight: 800;
    letter-spacing: -.02em;
    color: var(--pp-ink);
}
.pp-hero-title em {
    font-style: normal;
    background: linear-gradient(120deg, var(--pp-primary), var(--pp-accent));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}
.pp-hero-desc {
    margin: 0 0 var(--pp-sp-4);
    max-width: 520px;
    font-size: 17px;
    color: var(--pp-muted);
}

/* ---------- 6. 卡片与查询面板 ---------- */
.pp-card {
    background: var(--pp-card);
    border: 1px solid var(--pp-line);
    border-radius: var(--pp-radius-lg);
    box-shadow: var(--pp-shadow-lg);
}
.pp-query-card {
    padding: var(--pp-sp-4);
    position: relative;
}
.pp-query-card::before {
    content: "";
    position: absolute;
    inset: -1px;
    border-radius: inherit;
    padding: 1px;
    background: linear-gradient(135deg, rgba(37, 99, 235, .5), rgba(14, 165, 233, .12));
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    pointer-events: none;
}
.pp-card-title {
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 0 0 var(--pp-sp-1);
    font-size: var(--pp-fs-lg);
    font-weight: 700;
    color: var(--pp-ink);
}
.pp-card-sub { margin: 0 0 var(--pp-sp-3); font-size: var(--pp-fs-sm); color: var(--pp-muted); }

/* ---------- 7. 表单组件 ---------- */
.pp-field { margin-bottom: var(--pp-sp-3); }
.pp-label {
    display: block;
    margin-bottom: 6px;
    font-size: var(--pp-fs-sm);
    font-weight: 600;
    color: var(--pp-text);
}
.pp-label .pp-req { color: var(--pp-danger); margin-left: 2px; }
.pp-input-wrap { position: relative; }
.pp-input-icon {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--pp-muted);
    pointer-events: none;
    display: inline-flex;
}
.pp-input {
    display: block;
    width: 100%;
    height: 48px;
    padding: 0 16px;
    font-size: var(--pp-fs-md);
    font-family: inherit;
    color: var(--pp-ink);
    background: #fff;
    border: 1.5px solid var(--pp-line);
    border-radius: var(--pp-radius);
    transition: border-color var(--pp-fast) var(--pp-ease), box-shadow var(--pp-fast) var(--pp-ease);
}
.pp-input::placeholder { color: #94a3b8; }
.pp-input:hover { border-color: #cbd5e1; }
.pp-input:focus {
    outline: none;
    border-color: var(--pp-primary);
    box-shadow: 0 0 0 4px rgba(37, 99, 235, .14);
}
.pp-input-wrap .pp-input { padding-left: 44px; }
.pp-input.is-invalid {
    border-color: var(--pp-danger);
    box-shadow: 0 0 0 4px rgba(220, 38, 38, .10);
}
.pp-input.is-valid { border-color: var(--pp-success); }

/* 输入组：查询框 + 按钮 */
.pp-input-group { display: flex; gap: var(--pp-sp-2); }
.pp-input-group .pp-input-wrap { flex: 1; }
.pp-input-group .pp-input { height: 54px; font-size: 17px; }

/* 字段提示与错误 */
.pp-hint { margin-top: 6px; font-size: var(--pp-fs-xs); color: var(--pp-muted); }
.pp-error-msg {
    display: none;
    margin-top: 6px;
    font-size: var(--pp-fs-xs);
    color: var(--pp-danger);
}
.pp-error-msg.is-show { display: block; }
.pp-field-status {
    position: absolute;
    right: 14px;
    top: 50%;
    transform: translateY(-50%);
    font-size: var(--pp-fs-xs);
    line-height: 1;
}
.pp-field-status .ok { color: var(--pp-success); }
.pp-field-status .bad { color: var(--pp-danger); }
.pp-field-status .loading { color: var(--pp-muted); }

/* ---------- 8. 按钮 ---------- */
.pp-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 44px;
    padding: 0 22px;
    font-size: var(--pp-fs-md);
    font-weight: 600;
    font-family: inherit;
    line-height: 1;
    border-radius: var(--pp-radius);
    border: 1.5px solid transparent;
    cursor: pointer;
    transition: transform var(--pp-fast) var(--pp-ease),
                box-shadow var(--pp-fast) var(--pp-ease),
                background var(--pp-fast) var(--pp-ease),
                border-color var(--pp-fast) var(--pp-ease);
    -webkit-tap-highlight-color: transparent;
}
.pp-btn:active { transform: translateY(1px) scale(.99); }
.pp-btn-primary {
    color: #fff;
    background: linear-gradient(135deg, var(--pp-primary), var(--pp-primary-dark));
    box-shadow: 0 10px 24px rgba(37, 99, 235, .30);
}
.pp-btn-primary:hover {
    color: #fff;
    box-shadow: 0 14px 30px rgba(37, 99, 235, .38);
    transform: translateY(-1px);
}
.pp-btn-ghost {
    color: var(--pp-text);
    background: #fff;
    border-color: var(--pp-line);
}
.pp-btn-ghost:hover { color: var(--pp-primary); border-color: var(--pp-primary); }
.pp-btn-block { width: 100%; }
.pp-btn-lg { min-height: 54px; font-size: 17px; border-radius: var(--pp-radius); }
.pp-btn[disabled] { opacity: .6; cursor: not-allowed; transform: none; }
.pp-btn .pp-spinner {
    width: 18px; height: 18px;
    border: 2px solid rgba(255, 255, 255, .35);
    border-top-color: #fff;
    border-radius: 50%;
    animation: pp-spin .7s linear infinite;
}
@keyframes pp-spin { to { transform: rotate(360deg); } }

/* ---------- 9. 特性/步骤/数据区 ---------- */
.pp-section-head { max-width: 640px; margin: 0 auto var(--pp-sp-6); text-align: center; }
.pp-section-title { margin: 0 0 var(--pp-sp-2); font-size: var(--pp-fs-xl); font-weight: 800; color: var(--pp-ink); letter-spacing: -.01em; }
.pp-section-sub { margin: 0; color: var(--pp-muted); }

.pp-feature-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--pp-sp-4);
    margin: 0; padding: 0;
    list-style: none;
}
.pp-feature {
    padding: var(--pp-sp-4);
    background: var(--pp-card);
    border: 1px solid var(--pp-line);
    border-radius: var(--pp-radius-lg);
    box-shadow: var(--pp-shadow-sm);
    transition: transform var(--pp-normal) var(--pp-ease), box-shadow var(--pp-normal) var(--pp-ease);
}
.pp-feature:hover { transform: translateY(-4px); box-shadow: var(--pp-shadow-md); }
.pp-feature-icon {
    width: 46px; height: 46px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--pp-sp-3);
    border-radius: 12px;
    color: var(--pp-primary);
    background: var(--pp-primary-50);
}
.pp-feature h3 { margin: 0 0 6px; font-size: 17px; color: var(--pp-ink); }
.pp-feature p { margin: 0; font-size: var(--pp-fs-sm); color: var(--pp-muted); }

.pp-steps {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--pp-sp-4);
    margin: 0; padding: 0;
    list-style: none;
    counter-reset: pp-step;
}
.pp-step {
    position: relative;
    padding: var(--pp-sp-4) var(--pp-sp-4) var(--pp-sp-4) 72px;
    background: var(--pp-card);
    border: 1px solid var(--pp-line);
    border-radius: var(--pp-radius-lg);
    counter-increment: pp-step;
}
.pp-step::before {
    content: counter(pp-step, decimal-leading-zero);
    position: absolute;
    left: var(--pp-sp-4);
    top: var(--pp-sp-4);
    font-size: 24px;
    font-weight: 800;
    color: var(--pp-primary);
    opacity: .85;
}
.pp-step h3 { margin: 2px 0 6px; font-size: 16px; color: var(--pp-ink); }
.pp-step p { margin: 0; font-size: var(--pp-fs-sm); color: var(--pp-muted); }

.pp-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--pp-sp-4);
    padding: var(--pp-sp-5) var(--pp-sp-4);
    text-align: center;
}
.pp-stat b { display: block; font-size: 30px; font-weight: 800; color: var(--pp-primary); }
.pp-stat span { font-size: var(--pp-fs-sm); color: var(--pp-muted); }

/* ---------- 10. 认证页（登录/注册） ---------- */
.pp-auth {
    min-height: 100vh;
    display: grid;
    grid-template-columns: 1fr 1fr;
}
.pp-auth-side {
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: var(--pp-sp-6);
    color: #fff;
    background:
        radial-gradient(600px 400px at 110% -10%, rgba(14, 165, 233, .45), transparent 55%),
        radial-gradient(500px 500px at -20% 110%, rgba(37, 99, 235, .5), transparent 60%),
        linear-gradient(160deg, #0b1f4b 0%, #123a8f 55%, #0b254f 100%);
}
.pp-auth-side .pp-brand { color: #fff; }
/* 认证页左侧深色背景上的品牌图标：白色徽章底 + 边框 + 投影，确保深色图标边缘清晰、对比度 ≥ 4.5:1 */
.pp-auth-side .pp-brand-badge {
    background: #ffffff;
    border: 1px solid rgba(255, 255, 255, .7);
    box-shadow: 0 4px 14px rgba(0, 0, 0, .28), 0 0 0 1px rgba(14, 165, 233, .15);
}
.pp-auth-side .pp-brand-badge img {
    image-rendering: auto;
    filter: drop-shadow(0 1px 1px rgba(0, 0, 0, .08));
}
.pp-auth-quote h2 { margin: 0 0 var(--pp-sp-3); font-size: clamp(24px, 2.6vw, 34px); line-height: 1.3; font-weight: 800; }
.pp-auth-quote p { margin: 0; max-width: 420px; color: rgba(255, 255, 255, .78); }
.pp-auth-points { margin: var(--pp-sp-5) 0 0; padding: 0; list-style: none; display: grid; gap: 14px; }
.pp-auth-points li { display: flex; align-items: center; gap: 10px; color: rgba(255, 255, 255, .92); font-size: var(--pp-fs-sm); }
.pp-auth-points svg { flex: none; }
.pp-auth-foot { font-size: var(--pp-fs-xs); color: rgba(255, 255, 255, .55); }

.pp-auth-main {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--pp-sp-6) var(--pp-sp-4);
    background: var(--pp-bg);
}
.pp-auth-box { width: 100%; max-width: 420px; }
.pp-auth-head { margin-bottom: var(--pp-sp-5); }
.pp-auth-head h1 { margin: 0 0 8px; font-size: 28px; font-weight: 800; color: var(--pp-ink); }
.pp-auth-head p { margin: 0; color: var(--pp-muted); font-size: var(--pp-fs-sm); }
.pp-auth-head a { font-weight: 600; }

/* 表单行工具 */
.pp-form-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--pp-sp-2);
    margin-bottom: var(--pp-sp-4);
}
.pp-checkbox { display: inline-flex; align-items: center; gap: 8px; font-size: var(--pp-fs-sm); color: var(--pp-text); cursor: pointer; }
.pp-checkbox input {
    width: 18px; height: 18px;
    margin: 0;
    accent-color: var(--pp-primary);
    cursor: pointer;
}
.pp-link { font-size: var(--pp-fs-sm); font-weight: 600; }

/* 分割线 */
.pp-divider {
    display: flex;
    align-items: center;
    gap: var(--pp-sp-3);
    margin: var(--pp-sp-4) 0;
    font-size: var(--pp-fs-xs);
    color: var(--pp-muted);
}
.pp-divider::before,
.pp-divider::after {
    content: "";
    flex: 1;
    height: 1px;
    background: var(--pp-line);
}

/* 第三方登录 */
.pp-oauth { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--pp-sp-2); }
.pp-oauth-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 44px;
    font-size: var(--pp-fs-sm);
    font-weight: 600;
    color: var(--pp-text);
    background: #fff;
    border: 1.5px solid var(--pp-line);
    border-radius: var(--pp-radius);
    cursor: pointer;
    transition: border-color var(--pp-fast) var(--pp-ease), background var(--pp-fast) var(--pp-ease);
}
.pp-oauth-btn:hover { border-color: var(--pp-primary); color: var(--pp-primary); background: var(--pp-primary-50); }

/* 密码强度 */
.pp-strength { margin-top: 8px; }
.pp-strength-bars { display: flex; gap: 6px; }
.pp-strength-bars i {
    flex: 1;
    height: 5px;
    border-radius: 99px;
    background: var(--pp-line);
    transition: background var(--pp-fast) var(--pp-ease);
}
.pp-strength[data-level="1"] .pp-strength-bars i:nth-child(1) { background: var(--pp-danger); }
.pp-strength[data-level="2"] .pp-strength-bars i:nth-child(-n+2) { background: var(--pp-warning); }
.pp-strength[data-level="3"] .pp-strength-bars i:nth-child(-n+3) { background: var(--pp-success); }
.pp-strength-text { margin-top: 6px; font-size: var(--pp-fs-xs); color: var(--pp-muted); }

/* 协议行 */
.pp-agree { align-items: flex-start; }
.pp-agree .pp-checkbox { line-height: 1.5; }
.pp-agree a { font-weight: 600; }

/* 内联结果横幅（注册成功/查询结果） */
.pp-banner {
    display: none;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: var(--pp-sp-4);
    padding: 14px 16px;
    border-radius: var(--pp-radius);
    font-size: var(--pp-fs-sm);
    border: 1px solid transparent;
}
.pp-banner.is-show { display: flex; }
.pp-banner-success { background: var(--pp-success-light); border-color: #bbf7d0; color: #14532d; }
.pp-banner-error { background: var(--pp-danger-light); border-color: #fecaca; color: #7f1d1d; }
.pp-banner svg { flex: none; margin-top: 2px; }

/* ---------- 11. 弹窗（忘记密码 / 协议） ---------- */
.pp-modal-mask {
    position: fixed;
    inset: 0;
    z-index: 100;
    display: none;
    align-items: center;
    justify-content: center;
    padding: var(--pp-sp-4);
    background: rgba(15, 23, 42, .55);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
}
.pp-modal-mask.is-open { display: flex; }
.pp-modal {
    width: 100%;
    max-width: 460px;
    max-height: 82vh;
    overflow: auto;
    background: #fff;
    border-radius: var(--pp-radius-lg);
    box-shadow: var(--pp-shadow-lg);
    padding: var(--pp-sp-5);
}
.pp-modal h2 { margin: 0 0 8px; font-size: 20px; color: var(--pp-ink); }
.pp-modal .pp-modal-sub { margin: 0 0 var(--pp-sp-4); font-size: var(--pp-fs-sm); color: var(--pp-muted); }
.pp-modal-actions { display: flex; justify-content: flex-end; gap: var(--pp-sp-2); margin-top: var(--pp-sp-4); }
.pp-modal-close {
    position: absolute;
    right: 18px; top: 14px;
    border: 0;
    background: transparent;
    font-size: 26px;
    line-height: 1;
    color: var(--pp-muted);
    cursor: pointer;
}
.pp-modal-wrap { position: relative; }
.pp-policy-body { font-size: var(--pp-fs-sm); color: var(--pp-text); line-height: 1.8; }
.pp-policy-body h3 { margin: var(--pp-sp-3) 0 6px; font-size: 15px; color: var(--pp-ink); }

/* ---------- 12. 页脚 ---------- */
.pp-footer {
    border-top: 1px solid var(--pp-line);
    background: #fff;
    padding: var(--pp-sp-5) 0;
}
.pp-footer-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--pp-sp-3);
    flex-wrap: wrap;
    font-size: var(--pp-fs-sm);
    color: var(--pp-muted);
}
.pp-footer-links { display: flex; gap: var(--pp-sp-3); list-style: none; margin: 0; padding: 0; }

/* ---------- 13. Toast（轻提示，aria-live） ---------- */
.pp-toast-zone {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 200;
    display: grid;
    gap: 10px;
    width: min(92vw, 420px);
}
.pp-toast {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    border-radius: var(--pp-radius);
    background: var(--pp-ink);
    color: #fff;
    font-size: var(--pp-fs-sm);
    box-shadow: var(--pp-shadow-md);
    animation: pp-toast-in var(--pp-normal) var(--pp-ease);
}
.pp-toast.is-out { opacity: 0; transform: translateY(-8px); transition: all var(--pp-normal) var(--pp-ease); }
@keyframes pp-toast-in {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ---------- 14. 响应式 ---------- */
@media (max-width: 992px) {
    .pp-hero-grid { grid-template-columns: 1fr; gap: var(--pp-sp-5); }
    .pp-hero { text-align: center; }
    .pp-hero-desc { margin-left: auto; margin-right: auto; }
    .pp-hero .pp-input-group { max-width: 560px; margin: 0 auto; }
    .pp-feature-grid, .pp-steps, .pp-stats { grid-template-columns: repeat(2, 1fr); }
    .pp-auth { grid-template-columns: 1fr; }
    .pp-auth-side { display: none; }
}

@media (max-width: 640px) {
    .pp-nav { padding: 0 var(--pp-sp-3); }
    .pp-nav-links a:not(.pp-btn) { padding: 8px 10px; }
    .pp-section { padding: var(--pp-sp-6) 0; }
    .pp-feature-grid, .pp-steps, .pp-stats { grid-template-columns: 1fr; }
    .pp-input-group { flex-direction: column; }
    .pp-input-group .pp-btn { width: 100%; }
    .pp-query-card, .pp-feature, .pp-step { padding: var(--pp-sp-3); }
    .pp-step { padding-left: 60px; }
    .pp-step::before { left: var(--pp-sp-3); }
    .pp-oauth { grid-template-columns: 1fr; }
    .pp-auth-main { padding: var(--pp-sp-5) var(--pp-sp-3); }
    .pp-footer-inner { justify-content: center; text-align: center; }
    .pp-modal { padding: var(--pp-sp-4); }
}

/* ---------- 15. 顶栏用户区（头像昵称下拉）+ 移动端抽屉 ---------- */
.pp-nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 40px; height: 38px;
    padding: 0 9px;
    background: transparent;
    border: 1px solid var(--pp-line);
    border-radius: 10px;
    cursor: pointer;
}
.pp-nav-toggle span {
    display: block;
    height: 2px;
    background: var(--pp-ink);
    border-radius: 2px;
    transition: transform var(--pp-fast) var(--pp-ease), opacity var(--pp-fast) var(--pp-ease);
}
.pp-user-wrap { position: relative; }
.pp-user-trigger {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 5px 10px 5px 6px;
    background: transparent;
    border: 1px solid transparent;
    border-radius: 999px;
    font-size: var(--pp-fs-sm);
    color: var(--pp-text);
    cursor: pointer;
    transition: background var(--pp-fast) var(--pp-ease), border-color var(--pp-fast) var(--pp-ease);
}
.pp-user-trigger:hover { background: var(--pp-primary-50); border-color: var(--pp-line); }
/* 全站头像统一：圆角、覆盖、过渡、悬停微放大 */
.ub-avatar {
    display: inline-block;
    vertical-align: middle;
    border-radius: 50%;
    object-fit: cover;
    background: #eef2f7;
    transition: transform var(--pp-fast, .2s) var(--pp-ease, ease), box-shadow var(--pp-fast, .2s) var(--pp-ease, ease), opacity var(--pp-fast, .2s);
}
.ub-avatar:hover { transform: scale(1.06); box-shadow: 0 2px 8px rgba(79,140,255,.25); }
.pp-user-trigger:hover .ub-avatar { transform: scale(1.08); }
.ub-avatar-ph { user-select: none; }
.pp-user-trigger .ub-avatar {
    width: 30px; height: 30px; border-radius: 50%;
    object-fit: cover; flex: none;
}
.pp-user-name { max-width: 110px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.pp-user-caret { font-size: 12px; color: var(--pp-text-3, #94a3b8); transition: transform var(--pp-fast) var(--pp-ease); }
.pp-user-menu {
    position: absolute;
    top: calc(100% + 10px);
    right: 0;
    width: 268px;
    background: #fff;
    border: 1px solid var(--pp-line);
    border-radius: 14px;
    box-shadow: 0 18px 44px rgba(15, 23, 42, .14);
    padding: 8px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-6px);
    transition: opacity var(--pp-fast) var(--pp-ease), transform var(--pp-fast) var(--pp-ease), visibility 0s linear .15s;
    z-index: 100;
}
.pp-user-menu.is-open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    transition: opacity var(--pp-fast) var(--pp-ease), transform var(--pp-fast) var(--pp-ease);
}
.pp-um-head {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 10px 12px;
    border-bottom: 1px solid var(--pp-line);
    margin-bottom: 6px;
}
.pp-um-avatar .ub-avatar { width: 46px; height: 46px; border-radius: 50%; object-fit: cover; flex: none; }
.pp-um-meta { min-width: 0; }
.pp-um-name { font-weight: 700; color: var(--pp-ink); font-size: 15px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.pp-um-badges { display: flex; flex-wrap: wrap; gap: 4px; margin: 3px 0; }
.pp-um-money { font-size: 12px; color: var(--pp-text-3, #94a3b8); }
.pp-um-item {
    display: flex;
    align-items: center;
    gap: 9px;
    padding: 9px 12px;
    border-radius: 9px;
    font-size: var(--pp-fs-sm);
    color: var(--pp-text);
}
.pp-um-item:hover { background: var(--pp-primary-50); color: var(--pp-primary); }
.pp-um-item i { width: 16px; text-align: center; }
.pp-um-logout { color: #e5484d; }
.pp-um-logout:hover { background: #fff1f1; color: #e5484d; }

/* ---------- 16. 用户中心：顶栏 + 左侧边栏布局 ---------- */
.pp-uc-layout {
    display: grid;
    grid-template-columns: 216px minmax(0, 1fr);
    gap: 24px;
    padding-top: 24px;
    padding-bottom: 48px;
    align-items: start;
}
.pp-uc-toggle {
    display: none;
    grid-column: 1 / -1;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px;
    background: #fff;
    border: 1px solid var(--pp-line);
    border-radius: 10px;
    font-size: var(--pp-fs-sm);
    color: var(--pp-ink);
    cursor: pointer;
}
.pp-uc-side {
    position: sticky;
    top: 84px;
    background: #fff;
    border: 1px solid var(--pp-line);
    border-radius: 14px;
    padding: 10px;
    box-shadow: 0 6px 18px rgba(15, 23, 42, .04);
}
.pp-uc-side-title {
    padding: 8px 12px 10px;
    font-size: 12px;
    font-weight: 700;
    color: var(--pp-text-3, #94a3b8);
    letter-spacing: .08em;
}
.pp-uc-side a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border-radius: 9px;
    font-size: var(--pp-fs-sm);
    color: var(--pp-text);
    margin-bottom: 2px;
}
.pp-uc-side a:hover { background: var(--pp-primary-50); color: var(--pp-primary); }
.pp-uc-side a.is-active {
    background: var(--pp-primary-light);
    color: var(--pp-primary-dark);
    font-weight: 600;
}
.pp-uc-side a i { width: 18px; text-align: center; }
.pp-uc-main { min-width: 0; }

@media (max-width: 992px) {
    .pp-nav-toggle { display: inline-flex; }
    .pp-nav-links {
        display: none;
        position: absolute;
        top: calc(100% + 8px);
        left: var(--pp-sp-4);
        right: var(--pp-sp-4);
        flex-direction: column;
        align-items: stretch;
        gap: 2px;
        background: #fff;
        border: 1px solid var(--pp-line);
        border-radius: 14px;
        box-shadow: 0 18px 44px rgba(15, 23, 42, .14);
        padding: 10px;
    }
    .pp-nav-links.is-open { display: flex; }
    .pp-nav-links li { width: 100%; }
    .pp-nav-links > li > a { display: block; padding: 11px 14px; }
    .pp-user-wrap { width: 100%; }
    .pp-user-trigger { width: 100%; justify-content: flex-start; }
    .pp-user-menu {
        position: static;
        width: auto;
        margin: 4px 0 2px;
        box-shadow: none;
        border: 1px dashed var(--pp-line);
        opacity: 1;
        visibility: visible;
        transform: none;
        display: none;
        transition: none;
    }
    .pp-user-menu.is-open { display: block; }

    .pp-uc-layout { grid-template-columns: 1fr; gap: 14px; }
    .pp-uc-toggle { display: inline-flex; }
    .pp-uc-side {
        display: none;
        position: static;
        top: auto;
    }
    .pp-uc-side.is-open { display: block; }
}