/* =========================================================
   SEO软件开发专题页 独立样式 (rjkf.css)
   基于全局 style.css 之上的页面专属样式
   ========================================================= */

/* ---------- 通用 ---------- */
.rjkf-section { padding: 90px 0; }
.rjkf-section-alt { background: var(--bg-light); }
.rjkf-sec-header { text-align: center; margin-bottom: 56px; }

[data-animate] {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity .7s ease, transform .7s ease;
}
[data-animate].is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* =========================================================
   Hero
   ========================================================= */
.rjkf-hero {
    position: relative;
    padding: 150px 0 0;
    color: #fff;
    background: linear-gradient(135deg, #0f172a 0%, #1e40af 60%, #3730a3 100%);
    overflow: hidden;
}
.rjkf-hero-bg { position: absolute; inset: 0; pointer-events: none; }
.rjkf-shape {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: .32;
}
.rjkf-shape-1 { width: 460px; height: 460px; top: -140px; left: -140px; background: rgba(79,70,229,.55); }
.rjkf-shape-2 { width: 380px; height: 380px; top: 80px; right: -120px; background: rgba(37,99,235,.5); }
.rjkf-shape-3 { width: 300px; height: 300px; bottom: 40px; left: 34%; background: rgba(124,58,237,.45); }

.rjkf-hero-inner {
    position: relative;
    display: grid;
    grid-template-columns: 1.05fr 1fr;
    gap: 56px;
    align-items: center;
    padding-bottom: 70px;
}
.rjkf-hero-tag {
    display: inline-block;
    background: rgba(255,255,255,.12);
    border: 1px solid rgba(255,255,255,.25);
    font-size: .9rem;
    font-weight: 600;
    padding: 6px 18px;
    border-radius: 30px;
    margin-bottom: 22px;
    letter-spacing: .03em;
}
.rjkf-hero-title {
    font-size: 2.7rem;
    font-weight: 800;
    line-height: 1.28;
    letter-spacing: -.02em;
    margin-bottom: 18px;
}
.rjkf-hero-highlight {
    background: linear-gradient(90deg, #a5b4fc, #818cf8);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}
.rjkf-hero-desc {
    font-size: 1.06rem;
    line-height: 1.95;
    color: rgba(255,255,255,.82);
    margin-bottom: 28px;
}
.rjkf-hero-actions { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 26px; }
.rjkf-hero-points { display: flex; flex-wrap: wrap; gap: 18px; font-size: .92rem; color: rgba(255,255,255,.88); }
.rjkf-hero-points span { display: inline-flex; align-items: center; gap: 6px; }

/* 软件界面 Mockup */
.rjkf-mockup {
    background: rgba(255,255,255,.08);
    border: 1px solid rgba(255,255,255,.2);
    border-radius: var(--r-lg);
    backdrop-filter: blur(10px);
    box-shadow: 0 30px 60px rgba(0,0,0,.35);
    overflow: hidden;
}
.rjkf-mockup-head {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 14px 18px;
    background: rgba(0,0,0,.22);
    border-bottom: 1px solid rgba(255,255,255,.12);
}
.rjkf-mockup-dot { width: 11px; height: 11px; border-radius: 50%; display: inline-block; }
.rjkf-mockup-dot.red { background: #ef4444; }
.rjkf-mockup-dot.yellow { background: #f59e0b; }
.rjkf-mockup-dot.green { background: #10b981; }
.rjkf-mockup-title {
    margin-left: 6px;
    font-size: .88rem;
    font-weight: 600;
    color: rgba(255,255,255,.9);
    flex-grow: 1;
}
.rjkf-mockup-status { font-size: .72rem; color: #6ee7b7; }
.rjkf-mockup-body { padding: 20px 20px 22px; display: flex; flex-direction: column; gap: 14px; }
.rjkf-mockup-row {
    display: flex;
    align-items: center;
    gap: 12px;
    background: rgba(255,255,255,.07);
    border: 1px solid rgba(255,255,255,.1);
    border-radius: var(--r-md);
    padding: 12px 14px;
}
.rjkf-mockup-ico { font-size: 1.4rem; }
.rjkf-mockup-row b { display: block; font-size: .9rem; font-weight: 700; color: #fff; margin-bottom: 2px; }
.rjkf-mockup-row span:not(.ok) { font-size: .8rem; color: rgba(255,255,255,.6); }
.rjkf-mockup-row .ok { font-size: .8rem; color: #6ee7b7; }
.rjkf-mockup-bar {
    height: 10px;
    background: rgba(255,255,255,.12);
    border-radius: 20px;
    overflow: hidden;
}
.rjkf-mockup-bar-fill {
    height: 100%;
    border-radius: 20px;
    background: linear-gradient(90deg, #4f46e5, #818cf8);
    transition: width 1.5s ease;
}
.rjkf-mockup-meta { font-size: .8rem; color: rgba(255,255,255,.68); text-align: center; }
.rjkf-mockup-btns { display: flex; gap: 10px; }
.rjkf-btn-sm { padding: 8px 18px; font-size: .85rem; flex: 1; justify-content: center; }

/* Hero 底部数据条 */
.rjkf-hero-stats {
    position: relative;
    background: rgba(15,23,42,.45);
    border-top: 1px solid rgba(255,255,255,.14);
}
.rjkf-hero-stats-inner {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    padding: 30px 24px;
}
.rjkf-stat { text-align: center; }
.rjkf-stat-num {
    font-size: 2.2rem;
    font-weight: 800;
    color: #fff;
    line-height: 1.2;
    margin-bottom: 2px;
}
.rjkf-stat-label { font-size: .92rem; color: rgba(255,255,255,.72); }

/* =========================================================
   核心功能
   ========================================================= */
.rjkf-feat-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.rjkf-feat-card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--r-lg);
    padding: 30px 24px;
    transition: transform .35s ease, box-shadow .35s ease;
}
.rjkf-feat-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-xl); }
.rjkf-feat-main {
    border-top: 4px solid var(--primary);
    background:
        radial-gradient(circle at 100% 0%, rgba(99,102,241,.08), transparent 55%),
        #fff;
}
.rjkf-feat-icon { font-size: 2.4rem; margin-bottom: 16px; }
.rjkf-feat-ico {
    width: 52px; height: 52px;
    display: flex; align-items: center; justify-content: center;
    font-size: 1.5rem;
    background: #eef2ff;
    border-radius: 14px;
    margin-bottom: 16px;
}
.rjkf-feat-card h3 { font-size: 1.15rem; font-weight: 700; color: var(--text-dark); margin-bottom: 10px; line-height: 1.5; }
.rjkf-feat-card p { font-size: .92rem; line-height: 1.8; color: var(--text-light); }
.rjkf-feat-tag {
    display: inline-block;
    margin-top: 16px;
    font-size: .78rem;
    font-weight: 700;
    color: var(--primary);
    background: #eff6ff;
    padding: 3px 12px;
    border-radius: 20px;
}

/* =========================================================
   对比表
   ========================================================= */
.rjkf-compare {
    max-width: 900px;
    margin: 0 auto;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--r-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}
.rjkf-compare-table { width: 100%; border-collapse: collapse; }
.rjkf-compare-table th,
.rjkf-compare-table td {
    padding: 16px 20px;
    text-align: left;
    font-size: .95rem;
    border-bottom: 1px solid var(--border);
}
.rjkf-compare-table th:first-child,
.rjkf-compare-table td:first-child {
    font-weight: 600;
    color: var(--text-dark);
    width: 24%;
    background: #f8fafc;
}
.rjkf-compare-table thead th { background: #f8fafc; color: var(--text-dark); font-weight: 700; }
.rjkf-compare-table thead .rjkf-c-new { color: #fff; background: linear-gradient(135deg, #1e40af, #4f46e5); }
.rjkf-compare-table tbody tr:last-child td { border-bottom: none; }
.rjkf-compare-table tbody tr:hover td { background: #f8fafc; }
.rjkf-c-old { color: var(--text-light); }
.rjkf-c-new { color: var(--text-dark); font-weight: 500; }
.rjkf-c-new b { color: var(--primary); }

/* =========================================================
   界面展示 + 视频
   ========================================================= */
.rjkf-showcase-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 28px;
    align-items: start;
}
.rjkf-screenshot {
    margin: 0;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--r-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}
.rjkf-screenshot img { display: block; width: 100%; height: auto; }
.rjkf-screenshot figcaption {
    padding: 12px 16px;
    font-size: .85rem;
    color: var(--text-light);
    border-top: 1px solid var(--border);
    background: #fff;
}
.rjkf-video { background: #fff; border: 1px solid var(--border); border-radius: var(--r-lg); overflow: hidden; }
.rjkf-video-title {
    padding: 14px 16px;
    font-weight: 700;
    font-size: .98rem;
    color: var(--text-dark);
    border-bottom: 1px solid var(--border);
}
.rjkf-video-wrap video { display: block; width: 100%; aspect-ratio: 4 / 3; background: #000; }
.rjkf-video-note { padding: 10px 16px; font-size: .82rem; color: var(--text-light); }

/* =========================================================
   效果案例
   ========================================================= */
.rjkf-results {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}
.rjkf-result-item {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--r-lg);
    padding: 28px 26px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}
.rjkf-result-chart {
    display: flex;
    align-items: flex-end;
    gap: 28px;
    height: 150px;
    padding: 0 10px;
}
.rjkf-result-bar {
    flex: 1;
    border-radius: 8px 8px 0 0;
    position: relative;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding-top: 8px;
    font-weight: 800;
    font-size: .9rem;
    color: #fff;
}
.rjkf-result-bar-before {
    height: 22%;
    background: #cbd5e1;
    color: var(--text-light);
}
.rjkf-result-bar-after {
    height: 90%;
    background: linear-gradient(180deg, #4f46e5, #2563eb);
}
.rjkf-result-info h3 { font-size: 1.25rem; font-weight: 800; color: var(--text-dark); margin-bottom: 8px; }
.rjkf-result-info h3::first-line { color: var(--primary); }
.rjkf-result-info p { font-size: .93rem; line-height: 1.85; color: var(--text-light); }
.rjkf-result-metrics {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    text-align: center;
    background: linear-gradient(135deg, #1e40af, #4f46e5);
    border-radius: var(--r-md);
    padding: 20px 10px;
    color: #fff;
}
.rjkf-result-metrics b { display: block; font-size: 1.8rem; font-weight: 800; }
.rjkf-result-metrics span { font-size: .82rem; color: rgba(255,255,255,.8); }

/* =========================================================
   适用场景
   ========================================================= */
.rjkf-scene-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.rjkf-scene-card {
    text-align: center;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--r-lg);
    padding: 32px 22px;
    transition: transform .35s ease, box-shadow .35s ease;
}
.rjkf-scene-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.rjkf-scene-ico {
    width: 62px; height: 62px;
    margin: 0 auto 18px;
    display: flex; align-items: center; justify-content: center;
    font-size: 1.8rem;
    background: #eef2ff;
    border-radius: 50%;
}
.rjkf-scene-card h3 { font-size: 1.1rem; font-weight: 700; color: var(--text-dark); margin-bottom: 10px; }
.rjkf-scene-card p { font-size: .92rem; line-height: 1.8; color: var(--text-light); }

/* =========================================================
   软件资讯
   ========================================================= */
.rjkf-news-grid {
    display: flex;
    flex-direction: column;
    gap: 14px;
    max-width: 900px;
    margin: 0 auto;
}
.rjkf-news-card {
    display: flex;
    align-items: center;
    gap: 20px;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--r-md);
    padding: 16px 22px;
    transition: box-shadow .3s ease, transform .3s ease;
}
.rjkf-news-card:hover { box-shadow: var(--shadow-md); transform: translateX(6px); }
.rjkf-news-date {
    flex-shrink: 0;
    width: 58px; height: 58px;
    display: flex; flex-direction: column;
    align-items: center; justify-content: center;
    background: #eef2ff;
    border-radius: var(--r-md);
}
.rjkf-news-date b { font-size: 1.25rem; font-weight: 800; color: var(--primary); line-height: 1.1; }
.rjkf-news-date span { font-size: .75rem; color: var(--text-light); }
.rjkf-news-card h3 { font-size: 1.02rem; font-weight: 700; color: var(--text-dark); margin-bottom: 4px; transition: color .25s; }
.rjkf-news-card:hover h3 { color: var(--primary); }
.rjkf-news-card p { font-size: .86rem; color: var(--text-light); }

/* =========================================================
   FAQ
   ========================================================= */
.rjkf-faq { max-width: 820px; margin: 0 auto; display: flex; flex-direction: column; gap: 14px; }
.rjkf-faq-item {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--r-md);
    overflow: hidden;
    transition: box-shadow .3s ease;
}
.rjkf-faq-item.open { box-shadow: var(--shadow-md); border-color: var(--primary-light); }
.rjkf-faq-q {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    background: none;
    border: none;
    padding: 20px 22px;
    font-family: inherit;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-dark);
    text-align: left;
    cursor: pointer;
}
.rjkf-faq-arrow { font-size: .85rem; color: var(--text-light); transition: transform .3s ease; flex-shrink: 0; }
.rjkf-faq-item.open .rjkf-faq-arrow { transform: rotate(180deg); color: var(--primary); }
.rjkf-faq-a { max-height: 0; overflow: hidden; transition: max-height .35s ease; }
.rjkf-faq-a p { padding: 0 22px 20px; font-size: .93rem; line-height: 1.85; color: var(--text-light); }

/* =========================================================
   联系 / CTA
   ========================================================= */
.rjkf-contact {
    background: linear-gradient(135deg, #0f172a 0%, #1e40af 60%, #3730a3 100%);
    padding: 90px 0;
    color: #fff;
}
.rjkf-contact-inner {
    display: grid;
    grid-template-columns: 1fr 1.05fr;
    gap: 60px;
    align-items: center;
}
.rjkf-contact-tag {
    display: inline-block;
    background: rgba(255,255,255,.12);
    border: 1px solid rgba(255,255,255,.25);
    font-size: .8rem; font-weight: 700;
    padding: 5px 16px;
    border-radius: 20px;
    letter-spacing: .05em;
    margin-bottom: 18px;
}
.rjkf-contact-left h2 { font-size: 2rem; font-weight: 800; line-height: 1.35; margin-bottom: 16px; }
.rjkf-contact-left > p { font-size: 1.02rem; line-height: 1.9; color: rgba(255,255,255,.82); margin-bottom: 26px; }
.rjkf-contact-left > p b { color: #fbbf24; }
.rjkf-contact-list { display: flex; flex-direction: column; gap: 14px; }
.rjkf-contact-list li { display: flex; align-items: center; gap: 10px; font-size: 1rem; color: rgba(255,255,255,.92); }
.rjkf-contact-list li span { font-size: 1.15rem; }
.rjkf-contact-list li b { color: #fff; }

.rjkf-contact-form-card {
    background: #fff;
    border-radius: var(--r-lg);
    padding: 36px 34px 30px;
    box-shadow: 0 24px 60px rgba(0,0,0,.25);
}
.rjkf-form { display: flex; flex-direction: column; gap: 18px; }
.rjkf-form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.rjkf-form label {
    display: block;
    font-size: .85rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 6px;
}
.rjkf-form input,
.rjkf-form select,
.rjkf-form textarea {
    width: 100%;
    font-family: inherit;
    font-size: .93rem;
    color: var(--text-dark);
    border: 1px solid var(--border);
    border-radius: var(--r-md);
    padding: 12px 14px;
    transition: border-color .25s ease, box-shadow .25s ease;
    background: #fff;
}
.rjkf-form textarea { resize: vertical; min-height: 84px; }
.rjkf-form input:focus,
.rjkf-form select:focus,
.rjkf-form textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79,70,229,.14);
}
.rjkf-form-submit { width: 100%; margin-top: 4px; }
.rjkf-form-note { font-size: .78rem; color: var(--text-light); text-align: center; }

.rjkf-form-success { text-align: center; padding: 20px 10px; }
.rjkf-form-success-icon {
    width: 68px; height: 68px;
    margin: 0 auto 16px;
    display: flex; align-items: center; justify-content: center;
    background: #dcfce7;
    color: #16a34a;
    font-size: 1.8rem;
    border-radius: 50%;
}
.rjkf-form-success h3 { font-size: 1.4rem; font-weight: 800; color: var(--text-dark); margin-bottom: 10px; }
.rjkf-form-success p { font-size: .93rem; color: var(--text-light); line-height: 1.8; }

/* =========================================================
   响应式
   ========================================================= */
@media (max-width: 1024px) {
    .rjkf-feat-grid { grid-template-columns: repeat(2, 1fr); }
    .rjkf-scene-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 900px) {
    .rjkf-hero-inner { grid-template-columns: 1fr; gap: 44px; }
    .rjkf-hero-title { font-size: 2.2rem; }
    .rjkf-showcase-grid { grid-template-columns: 1fr; }
    .rjkf-results { grid-template-columns: 1fr; }
    .rjkf-contact-inner { grid-template-columns: 1fr; gap: 44px; }
}

@media (max-width: 768px) {
    .rjkf-section { padding: 64px 0; }
    .rjkf-hero { padding: 120px 0 0; }
    .rjkf-hero-stats-inner { grid-template-columns: repeat(2, 1fr); gap: 20px 12px; }
    .rjkf-compare-table th,
    .rjkf-compare-table td { padding: 12px 12px; font-size: .85rem; }
}

@media (max-width: 560px) {
    .rjkf-feat-grid { grid-template-columns: 1fr; }
    .rjkf-scene-grid { grid-template-columns: 1fr; }
    .rjkf-form-row { grid-template-columns: 1fr; }
    .rjkf-contact-form-card { padding: 28px 20px 24px; }
}