/* =========================================
   解决方案 (Solution) 页面样式
   鲸诚云 · 营销·获客·销售一体化解决方案
   ========================================= */

:root {
    --sol-blue: #2563eb;
    --sol-blue-deep: #1e40af;
    --sol-cyan: #06b6d4;
    --sol-dark: #0f172a;
    --sol-text: #1f2937;
    --sol-muted: #64748b;
    --sol-bg: #f8fafc;
    --sol-card: #ffffff;
    --sol-radius: 20px;
    --sol-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    --sol-shadow-hover: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

.sol-page {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
    color: var(--sol-text);
    line-height: 1.6;
    overflow-x: hidden;
    background: var(--sol-bg);
}

.sol-section {
    padding: 88px 0;
    position: relative;
}

.section-title {
    text-align: center;
    font-size: 2.2rem;
    font-weight: 800;
    margin-bottom: 14px;
    color: var(--sol-dark);
    letter-spacing: -0.5px;
}

.section-subtitle {
    text-align: center;
    font-size: 1.08rem;
    color: var(--sol-muted);
    margin-bottom: 52px;
    max-width: 780px;
    margin-left: auto;
    margin-right: auto;
}

/* ===== 按钮 ===== */
.btn-primary, .btn-outline {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 32px;
    border-radius: 30px;
    font-size: 1.05rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
}

.btn-primary {
    background: linear-gradient(135deg, var(--sol-blue) 0%, var(--sol-cyan) 100%);
    color: #fff;
    box-shadow: 0 8px 20px rgba(37, 99, 235, 0.32);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 28px rgba(37, 99, 235, 0.42);
    color: #fff;
}

.btn-outline {
    border: 2px solid var(--sol-blue);
    color: var(--sol-blue);
    background: transparent;
}

.btn-outline:hover {
    background: rgba(37, 99, 235, 0.06);
    transform: translateY(-2px);
    color: var(--sol-blue);
}

/* ===== 1. Hero ===== */
.sol-hero {
    background:
        radial-gradient(1200px 500px at 80% -10%, rgba(6, 182, 212, 0.16), transparent 60%),
        radial-gradient(900px 500px at 0% 0%, rgba(37, 99, 235, 0.14), transparent 55%),
        linear-gradient(135deg, #f0f7ff 0%, #eaf2ff 50%, #f0fbff 100%);
    padding: 132px 0 90px;
    overflow: hidden;
}

.sol-hero-grid {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 48px;
    align-items: center;
}

.sol-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    border-radius: 30px;
    background: rgba(37, 99, 235, 0.08);
    color: var(--sol-blue);
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 22px;
}

.sol-hero-content h1 {
    font-size: 3rem;
    font-weight: 800;
    line-height: 1.28;
    color: var(--sol-dark);
    margin-bottom: 22px;
    letter-spacing: -1px;
}

.sol-hero-content h1 span {
    background: linear-gradient(135deg, var(--sol-blue) 0%, var(--sol-cyan) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.sol-hero-sub {
    font-size: 1.18rem;
    color: var(--sol-muted);
    line-height: 1.85;
    margin-bottom: 32px;
    max-width: 560px;
}

.sol-hero-actions {
    display: flex;
    gap: 18px;
    flex-wrap: wrap;
}

.sol-hero-stats {
    display: flex;
    gap: 40px;
    margin-top: 42px;
}

.sol-stat {
    display: flex;
    flex-direction: column;
}

.sol-stat strong {
    font-size: 2rem;
    font-weight: 800;
    color: var(--sol-blue);
    background: linear-gradient(135deg, var(--sol-blue), var(--sol-cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.sol-stat span {
    font-size: 0.9rem;
    color: var(--sol-muted);
    margin-top: 2px;
}

/* 漏斗可视化 */
.sol-hero-visual {
    position: relative;
}

.sol-funnel {
    position: relative;
    background: rgba(255, 255, 255, 0.72);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-radius: 24px;
    border: 1px solid rgba(255, 255, 255, 0.85);
    box-shadow: 0 25px 50px -12px rgba(37, 99, 235, 0.25), inset 0 1px 0 rgba(255, 255, 255, 0.9);
    padding: 28px;
    overflow: hidden;
}

.sol-funnel::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    padding: 1px;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.4), rgba(6, 182, 212, 0.4));
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    pointer-events: none;
}

.sol-funnel-title {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--sol-dark);
    margin-bottom: 22px;
}

.sol-funnel-title i {
    color: var(--sol-blue);
}

.sol-funnel-sub {
    margin-left: auto;
    font-size: 0.72rem;
    font-weight: 500;
    color: var(--sol-muted);
    padding: 3px 10px;
    border-radius: 999px;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.08), rgba(6, 182, 212, 0.08));
    border: 1px solid rgba(37, 99, 235, 0.12);
}

.sol-funnel-stage {
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: 12px;
    padding: 11px 16px;
    margin: 0 auto;
    border-radius: 14px;
    color: #fff;
    text-align: left;
    position: relative;
    overflow: hidden;
    animation: solPulse 3.5s ease-in-out infinite;
    transition: box-shadow 0.3s ease;
}

.sol-funnel-stage:hover {
    box-shadow: 0 14px 30px -8px rgba(37, 99, 235, 0.55);
}

/* 流光扫过 */
.sol-funnel-stage::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 55%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.28), transparent);
    animation: solShine 4.5s ease-in-out infinite;
}

.sol-stage-num {
    font-style: normal;
    width: 28px;
    height: 28px;
    display: grid;
    place-items: center;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.22);
    border: 1px solid rgba(255, 255, 255, 0.35);
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 0.5px;
}

.sol-stage-body {
    display: flex;
    flex-direction: column;
    gap: 1px;
    min-width: 0;
}

.sol-stage-body span {
    font-size: 0.98rem;
    font-weight: 700;
    letter-spacing: 0.5px;
    line-height: 1.25;
}

.sol-stage-body em {
    font-style: normal;
    font-size: 0.72rem;
    opacity: 0.92;
    line-height: 1.35;
}

.sol-stage-pct {
    font-style: normal;
    font-weight: 800;
    font-size: 0.82rem;
    white-space: nowrap;
    padding: 3px 8px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.sol-funnel-flow {
    text-align: center;
    color: var(--sol-blue);
    font-size: 0.78rem;
    line-height: 1;
    margin: 8px 0;
    opacity: 0.55;
}

.sol-funnel-flow i {
    animation: solFlow 2s ease-in-out infinite;
}

.sol-funnel-stage.s1 { width: 100%; background: linear-gradient(135deg, #2563eb, #3b82f6); }
.sol-funnel-stage.s2 { width: 82%; background: linear-gradient(135deg, #3b82f6, #0ea5e9); animation-delay: 0.2s; }
.sol-funnel-stage.s3 { width: 64%; background: linear-gradient(135deg, #0ea5e9, #06b6d4); animation-delay: 0.4s; }
.sol-funnel-stage.s4 { width: 46%; background: linear-gradient(135deg, #06b6d4, #22d3ee); animation-delay: 0.6s; }

@keyframes solPulse {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-4px); }
}

@keyframes solShine {
    0% { left: -100%; }
    55%, 100% { left: 220%; }
}

@keyframes solFlow {
    0%, 100% { transform: translateY(0); opacity: 0.55; }
    50% { transform: translateY(4px); opacity: 1; }
}

/* ===== 2. 定位标签 ===== */
.sol-tags { padding-top: 0; margin-top: -20px; }

.sol-tag-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.sol-tag {
    background: var(--sol-card);
    border-radius: var(--sol-radius);
    padding: 30px 24px;
    text-align: center;
    box-shadow: var(--sol-shadow);
    border: 1px solid rgba(229, 231, 235, 0.5);
    transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

.sol-tag:hover {
    transform: translateY(-6px);
    box-shadow: var(--sol-shadow-hover);
    border-color: rgba(37, 99, 235, 0.25);
}

.sol-tag i {
    font-size: 2.2rem;
    background: linear-gradient(135deg, var(--sol-blue), var(--sol-cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 16px;
}

.sol-tag h3 { font-size: 1.2rem; font-weight: 700; color: var(--sol-dark); margin-bottom: 8px; }
.sol-tag p { font-size: 0.94rem; color: var(--sol-muted); }

/* ===== 3. 痛点 → 方案 ===== */
.sol-pain { background: #fff; }

.sol-pain-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
}

.sol-pain-item {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 20px 22px;
    border-radius: 16px;
    background: var(--sol-bg);
    border: 1px solid #eef2f7;
    transition: all 0.3s ease;
}

.sol-pain-item:hover {
    border-color: rgba(37, 99, 235, 0.3);
    transform: translateY(-2px);
}

.sol-pain-item p {
    flex: 1;
    margin: 0;
    font-size: 0.95rem;
    color: var(--sol-text);
}

.sol-pain-tag {
    flex-shrink: 0;
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 600;
    white-space: nowrap;
}

.sol-pain-tag.bad { background: #fee2e2; color: #dc2626; }
.sol-pain-tag.good { background: #dcfce7; color: #16a34a; }

.sol-pain-arrow { color: #cbd5e1; flex-shrink: 0; }

/* ===== 4. 三大核心能力 ===== */
.sol-cap-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.sol-cap-card {
    background: var(--sol-card);
    border-radius: var(--sol-radius);
    padding: 36px 30px;
    box-shadow: var(--sol-shadow);
    border: 1px solid rgba(229, 231, 235, 0.5);
    transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.sol-cap-card::before {
    content: "";
    position: absolute;
    inset: 0 0 auto 0;
    height: 4px;
    background: linear-gradient(90deg, var(--sol-blue), var(--sol-cyan));
    opacity: 0;
    transition: opacity 0.3s ease;
}

.sol-cap-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--sol-shadow-hover);
}

.sol-cap-card:hover::before { opacity: 1; }

.sol-cap-icon {
    width: 58px;
    height: 58px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
    color: #fff;
    background: linear-gradient(135deg, var(--sol-blue), var(--sol-cyan));
    margin-bottom: 20px;
    box-shadow: 0 8px 18px rgba(37, 99, 235, 0.28);
}

.sol-cap-card h3 { font-size: 1.35rem; font-weight: 700; color: var(--sol-dark); margin-bottom: 12px; }
.sol-cap-card p { font-size: 0.98rem; color: var(--sol-muted); margin-bottom: 18px; }
.sol-cap-card ul { list-style: none; padding: 0; margin: 0; }
.sol-cap-card li { font-size: 0.9rem; color: var(--sol-text); padding: 6px 0; }
.sol-cap-card li a { color: var(--sol-blue); font-weight: 600; text-decoration: none; }
.sol-cap-card li a:hover { text-decoration: underline; }
.sol-cap-card li::before { content: "\f00c"; font-family: "Font Awesome 5 Free"; font-weight: 900; color: var(--sol-cyan); margin-right: 8px; }

/* ===== 5. 全链路闭环 ===== */
.sol-loop { background: linear-gradient(135deg, #0f172a 0%, #1e3a8a 60%, #1d4ed8 100%); }

.sol-loop .section-title { color: #fff; }
.sol-loop .section-subtitle { color: rgba(255, 255, 255, 0.75); }

.sol-loop-flow {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 12px;
}

.sol-loop-step {
    width: 108px;
    height: 108px;
    border-radius: 22px;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, 0.18);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 10px;
    color: #fff;
    transition: all 0.3s ease;
}

.sol-loop-step i { font-size: 1.7rem; color: #7dd3fc; }
.sol-loop-step span { font-weight: 600; }
.sol-loop-step:hover { background: rgba(255, 255, 255, 0.2); transform: translateY(-4px); }

.sol-loop-arrow { color: rgba(255, 255, 255, 0.5); font-size: 1.2rem; }

/* ===== 6. 功能模块 Bento ===== */
.sol-module-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    grid-auto-rows: 150px;
    gap: 20px;
}

.sol-module {
    background: var(--sol-card);
    border-radius: var(--sol-radius);
    padding: 24px;
    box-shadow: var(--sol-shadow);
    border: 1px solid rgba(229, 231, 235, 0.5);
    display: flex;
    flex-direction: column;
    justify-content: center;
    transition: all 0.3s ease;
}

.sol-module.m-lg { grid-column: span 2; }

.sol-module:hover {
    transform: translateY(-5px);
    box-shadow: var(--sol-shadow-hover);
    border-color: rgba(6, 182, 212, 0.35);
}

.sol-module i {
    font-size: 1.6rem;
    background: linear-gradient(135deg, var(--sol-blue), var(--sol-cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 12px;
}

.sol-module h3 { font-size: 1.1rem; font-weight: 700; color: var(--sol-dark); margin-bottom: 6px; }
.sol-module p { font-size: 0.9rem; color: var(--sol-muted); margin: 0; }

/* ===== 7. 四大核心优势 ===== */
.sol-advantage { background: #fff; }

.sol-adv-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.sol-adv-card {
    background: var(--sol-bg);
    border-radius: var(--sol-radius);
    padding: 32px 26px;
    border: 1px solid #eef2f7;
    transition: all 0.3s ease;
}

.sol-adv-card:hover { transform: translateY(-5px); box-shadow: var(--sol-shadow-hover); }

.sol-adv-card i {
    font-size: 2rem;
    color: var(--sol-blue);
    margin-bottom: 16px;
}

.sol-adv-card h3 { font-size: 1.2rem; font-weight: 700; color: var(--sol-dark); margin-bottom: 10px; }
.sol-adv-card p { font-size: 0.94rem; color: var(--sol-muted); }

/* ===== 8. 系统价值 ===== */
.sol-value-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.sol-value-item {
    background: var(--sol-card);
    border-radius: 16px;
    padding: 28px 24px;
    box-shadow: var(--sol-shadow);
    border: 1px solid rgba(229, 231, 235, 0.5);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    transition: all 0.3s ease;
}

.sol-value-item:hover { transform: translateY(-4px); box-shadow: var(--sol-shadow-hover); }

.sol-value-item i {
    font-size: 1.7rem;
    color: var(--sol-cyan);
    margin-bottom: 12px;
}

.sol-value-item h3 { font-size: 1.08rem; font-weight: 700; color: var(--sol-dark); margin-bottom: 6px; }
.sol-value-item p { font-size: 0.9rem; color: var(--sol-muted); margin: 0; }

/* ===== 9. 多终端 ===== */
.sol-terminal { background: #fff; }

.sol-terminal-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    max-width: 760px;
    margin: 0 auto;
}

.sol-terminal-item {
    background: var(--sol-bg);
    border-radius: 20px;
    padding: 34px 20px;
    text-align: center;
    border: 1px solid #eef2f7;
    transition: all 0.3s ease;
}

.sol-terminal-item:hover { transform: translateY(-4px); box-shadow: var(--sol-shadow-hover); }

.sol-terminal-item i { font-size: 2.4rem; color: var(--sol-blue); margin-bottom: 14px; }
.sol-terminal-item span { font-weight: 600; color: var(--sol-dark); }

/* ===== 10. 数据背书 ===== */
.sol-proof-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.sol-proof-box {
    background: linear-gradient(135deg, #ffffff 0%, #f0f7ff 100%);
    border-radius: var(--sol-radius);
    padding: 40px 20px;
    text-align: center;
    border: 1px solid rgba(37, 99, 235, 0.12);
    box-shadow: var(--sol-shadow);
}

.sol-proof-box strong {
    display: block;
    font-size: 2.6rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--sol-blue), var(--sol-cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.sol-proof-box span { font-size: 0.98rem; color: var(--sol-muted); }

/* ===== 11. FAQ ===== */
.sol-faq { background: #fff; }

.sol-faq-list { max-width: 820px; margin: 0 auto; }

.sol-faq-item {
    border: 1px solid #eef2f7;
    border-radius: 14px;
    margin-bottom: 14px;
    overflow: hidden;
    background: #fff;
}

.sol-faq-q {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 24px;
    font-weight: 600;
    color: var(--sol-dark);
    cursor: pointer;
    transition: background 0.2s ease;
}

.sol-faq-q:hover { background: #f8fafc; }

.sol-faq-q i { color: #94a3b8; transition: transform 0.3s ease; }

.sol-faq-a { max-height: 0; overflow: hidden; transition: max-height 0.35s ease; }

.sol-faq-a p { padding: 0 24px 18px; margin: 0; color: var(--sol-muted); font-size: 0.95rem; }

.sol-faq-item.active .sol-faq-q i { transform: rotate(180deg); }
.sol-faq-item.active .sol-faq-a { max-height: 200px; }

/* ===== 12. CTA ===== */
.sol-bottom-cta {
    background: linear-gradient(135deg, #0f172a 0%, #1e3a8a 55%, #2563eb 100%);
    padding: 80px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.sol-bottom-cta::before {
    content: "";
    position: absolute;
    width: 420px;
    height: 420px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(6, 182, 212, 0.35), transparent 70%);
    top: -120px;
    right: -80px;
}

.sol-bottom-cta h2 { color: #fff; font-size: 2.2rem; font-weight: 800; margin-bottom: 14px; }
.sol-bottom-cta p { color: rgba(255, 255, 255, 0.8); margin-bottom: 36px; }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
    .sol-hero-grid { grid-template-columns: 1fr; }
    .sol-hero-visual { max-width: 560px; margin: 0 auto; }
    .sol-tag-grid { grid-template-columns: repeat(2, 1fr); }
    .sol-cap-grid { grid-template-columns: 1fr; }
    .sol-module-grid { grid-template-columns: repeat(2, 1fr); }
    .sol-adv-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
    .sol-section { padding: 60px 0; }
    .section-title { font-size: 1.7rem; }
    .section-subtitle { font-size: 0.98rem; }

    .sol-hero { padding: 110px 0 60px; }
    .sol-hero-content h1 { font-size: 2rem; }
    .sol-hero-stats { gap: 24px; }
    .sol-stat strong { font-size: 1.5rem; }

    .sol-tag-grid { grid-template-columns: 1fr; }

    /* 移动端：漏斗紧凑布局 */
    .sol-funnel { padding: 18px; }
    .sol-funnel-title { font-size: 0.95rem; margin-bottom: 16px; }
    .sol-funnel-sub { font-size: 0.66rem; padding: 2px 8px; }
    .sol-funnel-stage { gap: 10px; padding: 10px 12px; }
    .sol-funnel-stage.s1 { width: 100%; }
    .sol-funnel-stage.s2 { width: 94%; }
    .sol-funnel-stage.s3 { width: 88%; }
    .sol-funnel-stage.s4 { width: 80%; }
    .sol-stage-num { width: 24px; height: 24px; font-size: 0.68rem; border-radius: 7px; }
    .sol-stage-body span { font-size: 0.9rem; }
    .sol-stage-body em { font-size: 0.66rem; }
    .sol-stage-pct { font-size: 0.74rem; padding: 2px 7px; }
    .sol-funnel-flow { margin: 5px 0; font-size: 0.68rem; }

    /* 移动端：痛点方案纵向卡片 */
    .sol-pain-grid { grid-template-columns: 1fr; gap: 14px; }
    .sol-pain-item { flex-direction: column; align-items: flex-start; gap: 10px; padding: 18px; }
    .sol-pain-item p { width: auto; order: 0; }
    .sol-pain-arrow { transform: rotate(90deg); align-self: center; }

    .sol-loop-flow { gap: 8px; }
    .sol-loop-step { width: 84px; height: 84px; border-radius: 16px; }
    .sol-loop-arrow { font-size: 0.9rem; }

    .sol-module-grid { grid-template-columns: 1fr; grid-auto-rows: auto; }
    .sol-module.m-lg { grid-column: span 1; }
    .sol-adv-grid { grid-template-columns: 1fr; }
    .sol-value-grid { grid-template-columns: 1fr 1fr; }
    .sol-terminal-grid { grid-template-columns: 1fr; }
    .sol-proof-grid { grid-template-columns: 1fr 1fr; }
    .sol-proof-box strong { font-size: 2rem; }
    .sol-bottom-cta h2 { font-size: 1.7rem; }
}