/* ==========================================================
   landing.css · 首页产品介绍（扁平蓝橙，无渐变）
   仅作用于 #landingPage，不影响登录页与已登录工作台。
   ========================================================== */
#landingPage {
    --lp-primary: #2563eb;
    --lp-primary-hover: #1d4ed8;
    --lp-primary-soft: #eff6ff;
    --lp-primary-line: #dbeafe;
    --lp-accent: #f97316;
    --lp-ink: #111827;
    --lp-body: #374151;
    --lp-muted: #6b7280;
    --lp-line: #e5e7eb;
    --lp-canvas: #f9fafb;
    --lp-surface: #ffffff;
    position: relative;
    z-index: 1;
    min-height: 100vh;
    background: var(--lp-canvas);
    color: var(--lp-body);
    font-family: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', sans-serif;
    text-align: left;
    border: 0 !important;
    padding: 0 !important;
    margin: 0 !important;
}

#landingPage a { text-decoration: none; }

/* ---------------- 内联 SVG 图标（iconfont 风格） ---------------- */
.lp-ic {
    display: inline-block;
    width: 1em;
    height: 1em;
    flex: 0 0 auto;
    vertical-align: -0.125em;
    fill: none;
    stroke: currentColor;
}

/* ---------------- 品牌 Logo（后台「站点标识」） ---------------- */
#landingPage .landing-brand-mark img {
    display: block;
    width: 100%;
    height: 100%;
    border-radius: 8px;
    object-fit: contain;
    background: #fff;
}
#landingPage .landing-brand-mark img[hidden] { display: none !important; }
#landingPage .landing-brand-mark.is-logo { background: transparent; }
#landingPage .landing-brand-mark.is-logo .brand-ic { display: none; }
#landingPage .landing-brand-mark .brand-ic { width: 16px; height: 16px; }
.auth-brand-icon img {
    display: block;
    width: 100%;
    height: 100%;
    padding: 5px;
    box-sizing: border-box;
    border-radius: 16px;
    object-fit: contain;
}
.auth-brand-icon img[hidden] { display: none !important; }
/* 自定义 Logo 生效时清掉蓝色渐变底板，否则透明 Logo 会和蓝底叠在一起显成一团 */
.auth-brand-icon.is-logo {
    background: #fff !important;
    border-color: #fff !important;
    box-shadow: 0 8px 20px rgba(15,23,42,.10) !important;
    animation: none;
}
.auth-brand-icon.is-logo .brand-ic { display: none; }
/* 自定义 Logo 生效时，隐藏 main.css 的默认占位图形（▣）与默认图标，只展示上传的 Logo */
.auth-brand-icon.is-logo::before { content: none !important; display: none !important; }
.auth-brand-icon.is-logo > .brand-ic { display: none !important; }
.auth-brand-icon.is-logo img[data-brand-logo] {
    width: 100%;
    height: 100%;
    padding: 0;
    border-radius: inherit;
    background: transparent;
}

/* 注册表单：邮箱验证码按钮 */
.auth-code-row { display: flex; gap: 8px; align-items: flex-start; }
.auth-code-row .input-icon-wrap { flex: 1; min-width: 0; }
.auth-code-row .input-icon-wrap input { margin: 0 !important; }
.auth-code-btn {
    flex: 0 0 auto;
    min-height: 48px !important;
    padding: 0 16px !important;
    border: 1px solid var(--st-primary, #2563eb) !important;
    border-radius: 11px !important;
    background: var(--st-primary, #2563eb) !important;
    color: #fff !important;
    font-size: 13px !important;
    font-weight: 600 !important;
    white-space: nowrap;
    cursor: pointer;
    transition: background .2s;
}
.auth-code-btn:hover:not(:disabled) { background: var(--st-primary-hover, #1d4ed8) !important; }
.auth-code-btn:disabled { opacity: .55; cursor: not-allowed; }
.auth-field-hint { display: block; margin-top: 6px; color: #7d899c; font-size: 12px; line-height: 1.5; }

/* 导航栏 Logo：按高度等比缩放，避免原图以原始尺寸撑开、和站点名称串在一起 */
.navbar-brand-logo {
    display: block;
    height: 30px;
    width: auto;
    max-width: 140px;
    object-fit: contain;
    border-radius: 8px;
}
.navbar-brand-logo[hidden] { display: none !important; }

/* ---------------- 顶部导航 ---------------- */
#landingPage .landing-nav {
    position: sticky;
    top: 0;
    z-index: 20;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    height: 64px;
    padding: 0 max(20px, calc((100vw - 1200px) / 2));
    background: #fff;
    border-bottom: 1px solid var(--lp-line);
}
#landingPage .landing-brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: var(--lp-ink);
    font-size: 16px;
    font-weight: 700;
    white-space: nowrap;
}
#landingPage .landing-brand-mark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 30px;
    height: 30px;
    border-radius: 8px;
    background: var(--lp-primary);
    color: #fff;
    font-size: 13px;
}
#landingPage .landing-nav-links {
    display: flex;
    align-items: center;
    gap: 4px;
    flex: 1;
    justify-content: center;
}
#landingPage .landing-nav-links a {
    padding: 8px 14px;
    border-radius: 8px;
    color: var(--lp-muted);
    font-size: 13px;
    transition: color .15s, background .15s;
}
#landingPage .landing-nav-links a:hover {
    color: var(--lp-primary);
    background: var(--lp-primary-soft);
}
#landingPage .landing-nav-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}
#landingPage .landing-menu {
    display: none;
    width: 34px;
    height: 34px;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--lp-line);
    border-radius: 8px;
    background: #fff;
    color: var(--lp-body);
    font-size: 15px;
    cursor: pointer;
}

/* ---------------- 按钮 ---------------- */
#landingPage .landing-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 7px;
    height: 36px;
    padding: 0 16px;
    border: 1px solid transparent;
    border-radius: 8px;
    font-size: 13px;
    font-weight: 600;
    line-height: 1;
    white-space: nowrap;
    cursor: pointer;
    transition: background .15s, color .15s, border-color .15s;
    box-shadow: none;
}
#landingPage .landing-btn i { font-size: 12px; }
#landingPage .landing-btn-primary {
    background: var(--lp-primary);
    border-color: var(--lp-primary);
    color: #fff;
}
#landingPage .landing-btn-primary:hover { background: var(--lp-primary-hover); border-color: var(--lp-primary-hover); }
#landingPage .landing-btn-ghost {
    background: #fff;
    border-color: transparent;
    color: var(--lp-body);
}
#landingPage .landing-btn-ghost:hover { color: var(--lp-primary); background: var(--lp-primary-soft); }
#landingPage .landing-btn-outline {
    background: #fff;
    border-color: var(--lp-line);
    color: var(--lp-ink);
}
#landingPage .landing-btn-outline:hover { border-color: var(--lp-primary); color: var(--lp-primary); }
#landingPage .landing-btn-lg { height: 46px; padding: 0 24px; font-size: 14px; border-radius: 10px; }
#landingPage .landing-btn-lg i { font-size: 13px; }

/* ---------------- 主视觉 ---------------- */
#landingPage .landing-main { display: block; }
#landingPage .landing-hero {
    position: relative;
    padding: 76px 24px 0;
    background: radial-gradient(120% 92% at 50% 0%, #ffffff 0%, #f4f8ff 52%, #eaf1ff 100%);
    border-bottom: 1px solid var(--lp-line);
    text-align: center;
}
#landingPage .landing-hero-inner { max-width: 880px; margin: 0 auto; }
#landingPage .landing-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 7px 14px;
    border: 1px solid var(--lp-primary-line);
    border-radius: 999px;
    background: #fff;
    color: var(--lp-primary);
    font-size: 12px;
    font-weight: 600;
}
#landingPage .landing-badge i {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--lp-accent);
}
#landingPage .landing-hero h1 {
    display: block;
    margin: 22px 0 0;
    color: var(--lp-ink);
    font-size: 44px;
    font-weight: 800;
    line-height: 1.28;
    letter-spacing: -0.5px;
}
#landingPage .landing-hero h1 span { display: block; }
#landingPage .landing-hero h1 em {
    display: block;
    margin-top: 4px;
    color: var(--lp-accent);
    font-style: normal;
    font-size: 40px;
}
#landingPage .landing-subtitle {
    margin: 20px auto 0;
    max-width: 620px;
    color: var(--lp-muted);
    font-size: 15px;
    line-height: 1.85;
}
#landingPage .landing-actions {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-top: 30px;
    flex-wrap: wrap;
}
#landingPage .landing-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    max-width: 880px;
    margin: 52px auto 0;
    background: #fff;
    border: 1px solid var(--lp-line);
    border-bottom: 0;
    border-radius: 14px 14px 0 0;
    overflow: hidden;
    box-shadow: 0 12px 30px rgba(16, 24, 40, .05);
}
#landingPage .landing-stats > div {
    padding: 24px 12px;
    text-align: center;
    border-right: 1px solid var(--lp-line);
}
#landingPage .landing-stats > div:last-child { border-right: 0; }
#landingPage .landing-stats b {
    display: block;
    color: var(--lp-ink);
    font-size: 26px;
    font-weight: 800;
    letter-spacing: -0.4px;
}
#landingPage .landing-stats span {
    display: block;
    margin-top: 6px;
    color: var(--lp-muted);
    font-size: 12px;
}

#landingPage .landing-platforms {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-top: 26px;
}
#landingPage .landing-platforms span {
    margin-right: 2px;
    color: var(--lp-muted);
    font-size: 12px;
}
#landingPage .landing-platforms b {
    padding: 5px 12px;
    border: 1px solid var(--lp-line);
    border-radius: 999px;
    background: #fff;
    color: var(--lp-body);
    font-size: 12px;
    font-weight: 600;
}

/* ---------------- 内容板块 ---------------- */
#landingPage .landing-section {
    max-width: 1200px;
    margin: 0 auto;
    padding: 76px 24px 0;
}
#landingPage .landing-section-head {
    max-width: 640px;
    margin: 0 auto 36px;
    text-align: center;
}
#landingPage .landing-eyebrow {
    display: block;
    color: var(--lp-primary);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: .14em;
    margin-bottom: 10px;
}
#landingPage .landing-section-head h2 {
    margin: 0;
    color: var(--lp-ink);
    font-size: 28px;
    font-weight: 800;
    letter-spacing: -0.3px;
    line-height: 1.4;
}
#landingPage .landing-section-head p {
    margin: 12px 0 0;
    color: var(--lp-muted);
    font-size: 14px;
    line-height: 1.8;
}

#landingPage .landing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}
#landingPage .landing-card {
    padding: 26px 24px;
    background: var(--lp-surface);
    border: 1px solid var(--lp-line);
    border-radius: 14px;
    text-align: left;
    transition: border-color .18s, transform .18s, box-shadow .18s;
}
#landingPage .landing-card:hover {
    border-color: var(--lp-primary-line);
    transform: translateY(-2px);
    box-shadow: 0 8px 22px rgba(16, 24, 40, .06);
}
#landingPage .landing-card-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    margin-bottom: 16px;
    border-radius: 10px;
    background: var(--lp-primary-soft);
    color: var(--lp-primary);
    font-size: 17px;
}
#landingPage .landing-card b {
    display: block;
    color: var(--lp-ink);
    font-size: 15px;
    font-weight: 700;
}
#landingPage .landing-card p {
    margin: 8px 0 0;
    color: var(--lp-muted);
    font-size: 13px;
    line-height: 1.8;
}

#landingPage .landing-steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 14px;
}
#landingPage .landing-steps > div {
    position: relative;
    padding: 24px 20px;
    background: var(--lp-surface);
    border: 1px solid var(--lp-line);
    border-radius: 14px;
}
#landingPage .landing-steps > div:not(:last-child):after {
    content: '';
    position: absolute;
    top: 41px;
    right: -14px;
    width: 14px;
    height: 1px;
    background: var(--lp-primary-line);
}
#landingPage .landing-steps span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    border-radius: 9px;
    background: var(--lp-primary);
    color: #fff;
    font-size: 13px;
    font-weight: 700;
}
#landingPage .landing-steps b {
    display: block;
    margin-top: 14px;
    color: var(--lp-ink);
    font-size: 15px;
}
#landingPage .landing-steps small {
    display: block;
    margin-top: 8px;
    color: var(--lp-muted);
    font-size: 12.5px;
    line-height: 1.75;
}

/* ---------------- 行动区 ---------------- */
#landingPage .landing-cta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    max-width: 1200px;
    margin: 76px auto 0;
    padding: 34px 36px;
    background: linear-gradient(135deg, #f7faff 0%, #eef4ff 100%);
    border: 1px solid var(--lp-primary-line);
    border-radius: 16px;
    box-shadow: 0 14px 32px rgba(37, 99, 235, .07);
    flex-wrap: wrap;
}
#landingPage .landing-cta > div:first-child b {
    display: block;
    color: var(--lp-ink);
    font-size: 22px;
    font-weight: 800;
    letter-spacing: -0.3px;
}
#landingPage .landing-cta > div:first-child span {
    display: block;
    margin-top: 8px;
    color: var(--lp-muted);
    font-size: 13px;
    line-height: 1.7;
}

/* ---------------- 联系我们 ---------------- */
#landingPage .landing-contact {
    margin-top: 76px;
    padding: 64px 24px 72px;
    background: #0b1220;
}
#landingPage .landing-contact-inner {
    display: flex;
    align-items: center;
    gap: 48px;
    max-width: 1200px;
    margin: 0 auto;
}
#landingPage .landing-contact-copy { flex: 1 1 auto; min-width: 0; }
#landingPage .landing-contact-copy .landing-eyebrow { color: #93c5fd; }
#landingPage .landing-contact h2 {
    margin: 0;
    color: #fff;
    font-size: 28px;
    font-weight: 800;
    letter-spacing: -0.3px;
}
#landingPage .landing-contact p {
    max-width: 440px;
    margin: 10px 0 28px;
    color: #94a3b8;
    font-size: 13.5px;
    line-height: 1.8;
}
#landingPage .landing-contact-list {
    display: flex;
    flex-direction: column;
    gap: 18px;
    margin: 0;
    padding: 0;
    list-style: none;
}
#landingPage .landing-contact-list li {
    display: flex;
    align-items: center;
    gap: 14px;
}
#landingPage .landing-contact-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex: 0 0 40px;
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: var(--lp-primary);
    color: #fff;
    font-size: 15px;
}
#landingPage .landing-contact-list small {
    display: block;
    color: #94a3b8;
    font-size: 12px;
}
#landingPage .landing-contact-list b {
    display: block;
    margin-top: 3px;
    color: #f8fafc;
    font-size: 15px;
    font-weight: 700;
    word-break: break-all;
}
#landingPage .landing-contact-side {
    display: flex;
    flex: 0 0 260px;
    justify-content: center;
}
#landingPage .landing-qr-card {
    width: 260px;
    padding: 16px;
    border-radius: 14px;
    background: #fff;
    text-align: center;
}
#landingPage .landing-qr-card[hidden] { display: none !important; }
#landingPage .landing-qr-card img {
    display: block;
    width: 100%;
    max-width: 228px;
    margin: 0 auto;
    border-radius: 8px;
    background: #f3f4f6;
    aspect-ratio: 1 / 1;
    object-fit: contain;
}
#landingPage .landing-qr-card span {
    display: block;
    margin-top: 10px;
    color: var(--lp-muted);
    font-size: 12px;
}
#landingPage .landing-qr-fallback {
    width: 260px;
    padding: 26px 22px;
    border: 1px solid rgba(255, 255, 255, .12);
    border-radius: 14px;
    background: rgba(255, 255, 255, .04);
    text-align: center;
}
#landingPage .landing-qr-fallback-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 46px;
    height: 46px;
    border-radius: 12px;
    background: var(--lp-primary);
    color: #fff;
    font-size: 18px;
}
#landingPage .landing-qr-fallback b {
    display: block;
    margin-top: 12px;
    color: #fff;
    font-size: 15px;
}
#landingPage .landing-qr-fallback p {
    margin: 8px 0 16px;
    max-width: none;
    color: #94a3b8;
    font-size: 12.5px;
    line-height: 1.75;
}

/* ---------------- 页脚 ---------------- */
#landingPage .landing-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    padding: 30px max(24px, calc((100vw - 1200px) / 2));
    background: #070c16;
    border-top: 1px solid rgba(255, 255, 255, .06);
    color: #94a3b8;
    font-size: 12px;
    flex-wrap: wrap;
}
#landingPage .landing-footer-brand {
    display: flex;
    align-items: center;
    gap: 10px;
}
#landingPage .landing-footer-brand b {
    display: block;
    color: #f8fafc;
    font-size: 13px;
}
#landingPage .landing-footer-brand span {
    display: block;
    margin-top: 2px;
    color: #7c8aa0;
    font-size: 11px;
}
#landingPage .landing-footer-links {
    display: flex;
    gap: 18px;
}
#landingPage .landing-footer-links a { color: #94a3b8; }
#landingPage .landing-footer-links a:hover { color: #fff; }
#landingPage .landing-footer-copy { color: #64748b; }

/* 已登录后隐藏介绍页，避免与工作台冲突 */
body.logged-in #landingPage { display: none !important; }

/* 未登录时主内容容器为空，直接隐藏，避免页脚下方出现大片白色空白 */
body:not(.logged-in) .main-content { display: none !important; }

@media (max-width: 900px) {
    #landingPage .landing-hero h1 { font-size: 34px; }
    #landingPage .landing-hero h1 em { font-size: 31px; }
    #landingPage .landing-grid { grid-template-columns: 1fr; }
    #landingPage .landing-steps { grid-template-columns: repeat(2, 1fr); }
    #landingPage .landing-steps > div:not(:last-child):after { display: none; }
    #landingPage .landing-contact-inner { flex-direction: column; align-items: flex-start; gap: 32px; }
    #landingPage .landing-contact-side { flex: 0 0 auto; width: 100%; justify-content: flex-start; }
    #landingPage .landing-nav-links { display: none; }
    #landingPage .landing-menu { display: inline-flex; align-items: center; justify-content: center; }
}

@media (max-width: 600px) {
    #landingPage .landing-nav { height: 58px; padding: 0 16px; }
    #landingPage .landing-nav-actions .landing-btn-ghost { display: none; }
    #landingPage .landing-hero { padding: 52px 16px 0; }
    #landingPage .landing-hero h1 { font-size: 27px; }
    #landingPage .landing-hero h1 em { font-size: 24px; }
    #landingPage .landing-subtitle { font-size: 13.5px; }
    #landingPage .landing-actions .landing-btn-lg { flex: 1 1 100%; }
    #landingPage .landing-stats { grid-template-columns: 1fr; margin-top: 32px; border-radius: 12px; }
    #landingPage .landing-stats > div { border-right: 0; border-bottom: 1px solid var(--lp-line); padding: 16px 12px; }
    #landingPage .landing-stats > div:last-child { border-bottom: 0; }
    #landingPage .landing-section { padding: 52px 16px 0; }
    #landingPage .landing-section-head h2 { font-size: 22px; }
    #landingPage .landing-steps { grid-template-columns: 1fr; }
    #landingPage .landing-cta { margin: 52px 16px 0; padding: 24px 20px; flex-direction: column; align-items: flex-start; }
    #landingPage .landing-contact { margin-top: 52px; padding: 44px 16px 52px; }
    #landingPage .landing-contact h2 { font-size: 22px; }
    #landingPage .landing-contact-side, #landingPage .landing-qr-card, #landingPage .landing-qr-fallback { width: 100%; }
    #landingPage .landing-footer { padding: 22px 16px 30px; }
}

/* 导航折叠后的下拉菜单 */
#landingPage .landing-nav.is-open .landing-nav-links {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    position: absolute;
    top: 58px;
    left: 0;
    right: 0;
    padding: 10px 16px 14px;
    background: #fff;
    border-bottom: 1px solid var(--lp-line);
    gap: 2px;
}
#landingPage .landing-nav.is-open .landing-nav-links a { text-align: left; }