/* W0004 核心销售链页面 — 阿里云风组件库 V2
 * 继承 W0002 staging-v1.css + 新增 4 个核心组件
 * 设计 tokens (与 W0001S v1.1 一致):
 *   --nc-blue: #0064d2
 *   --nc-text: #1f2329
 *   --nc-bg: #ffffff
 *   --nc-bg-gray: #fafbfc
 *   --nc-border: #e5e6eb
 */

/* === 已有 W0002 v1 tokens === */
:root {
    --nc-blue: #0064d2;
    --nc-blue-hover: #1890ff;
    --nc-blue-pressed: #0050a0;
    --nc-text: #1f2329;
    --nc-text-sub: #4e5969;
    --nc-text-weak: #86909c;
    --nc-bg: #ffffff;
    --nc-bg-gray: #fafbfc;
    --nc-bg-gray-mid: #f2f3f5;
    --nc-border: #e5e6eb;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
                 "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    color: var(--nc-text);
    margin: 0;
    padding: 0;
    background: var(--nc-bg);
    line-height: 1.7;
}

/* === Header (统一, 10 页面都用) === */
.nc-header {
    background: #fff;
    border-bottom: 1px solid var(--nc-border);
    height: 60px;
    display: flex;
    align-items: center;
    padding: 0 24px;
    max-width: 1200px;
    margin: 0 auto;
    position: sticky;
    top: 0;
    z-index: 100;
}
.nc-logo {
    font-size: 20px;
    font-weight: 700;
    color: var(--nc-text);
    text-decoration: none;
}
.nc-nav {
    display: flex;
    gap: 32px;
    margin-left: 48px;
    list-style: none;
    padding: 0;
}
.nc-nav a {
    color: var(--nc-text);
    text-decoration: none;
    font-size: 14px;
}
.nc-nav a:hover { color: var(--nc-blue); }
.nc-cta-top {
    margin-left: auto;
    background: var(--nc-blue);
    color: #fff !important;
    padding: 8px 20px;
    border-radius: 4px;
    font-size: 14px;
    text-decoration: none;
}
.nc-cta-top:hover { background: var(--nc-blue-hover); }

/* === Hero === */
.nc-hero {
    padding: 80px 24px;
    background: linear-gradient(180deg, #fafbfc 0%, #ffffff 100%);
}
.nc-hero-grid {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
}
.nc-hero h1 {
    font-size: 44px;
    line-height: 1.3;
    font-weight: 700;
    margin: 0 0 24px 0;
    color: var(--nc-text);
}
.nc-hero h1 small {
    display: block;
    font-size: 20px;
    font-weight: 400;
    color: var(--nc-text-sub);
    margin-top: 12px;
}
.nc-hero-sub {
    font-size: 16px;
    color: var(--nc-text-sub);
    margin: 0 0 16px 0;
}
.nc-hero-trust {
    font-size: 12px;
    color: var(--nc-text-weak);
    margin: 0 0 32px 0;
}
.nc-hero-actions { display: flex; gap: 16px; align-items: center; flex-wrap: wrap; }
.nc-btn-primary {
    background: var(--nc-blue);
    color: #fff !important;
    padding: 12px 24px;
    border-radius: 4px;
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    display: inline-block;
}
.nc-btn-primary:hover { background: var(--nc-blue-hover); }
.nc-btn-link {
    color: var(--nc-blue) !important;
    text-decoration: none;
    font-size: 14px;
}
.nc-btn-link:hover { color: var(--nc-blue-hover); }
.nc-btn-secondary {
    background: #fff;
    color: var(--nc-blue) !important;
    padding: 12px 24px;
    border-radius: 4px;
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    border: 1px solid var(--nc-blue);
    display: inline-block;
}
.nc-btn-secondary:hover { background: var(--nc-bg-gray); }

/* === Section 通用 === */
.nc-section {
    padding: 64px 24px;
}
.nc-section-gray {
    padding: 64px 24px;
    background: var(--nc-bg-gray);
}
.nc-section-inner { max-width: 1200px; margin: 0 auto; }
.nc-section-title {
    font-size: 28px;
    font-weight: 600;
    text-align: center;
    margin: 0 0 16px 0;
    color: var(--nc-text);
}
.nc-section-subtitle {
    font-size: 16px;
    color: var(--nc-text-sub);
    text-align: center;
    margin: 0 0 48px 0;
    max-width: 720px;
    margin-left: auto;
    margin-right: auto;
}

/* === Feature Card (4 列网格) === */
.nc-grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.nc-grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.nc-grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}
.nc-card {
    background: #fff;
    border: 1px solid var(--nc-border);
    border-radius: 8px;
    padding: 24px;
    transition: border-color 0.2s, box-shadow 0.2s;
}
.nc-card:hover {
    border-color: var(--nc-blue);
    box-shadow: 0 4px 12px rgba(0, 100, 210, 0.08);
}
.nc-card-tag {
    display: inline-block;
    background: #e6f4ff;
    color: var(--nc-blue);
    font-size: 11px;
    padding: 2px 8px;
    border-radius: 4px;
    margin-bottom: 12px;
}
.nc-card-tag-recommend {
    background: #fa8c16;
    color: #fff;
}
.nc-card-tag-demo {
    background: #86909c;
    color: #fff;
}
.nc-card-title {
    font-size: 18px;
    font-weight: 600;
    margin: 0 0 8px 0;
    color: var(--nc-text);
}
.nc-card-desc {
    font-size: 14px;
    color: var(--nc-text-sub);
    margin: 0;
    line-height: 1.6;
}

/* === Product Card (产品三档) === */
.nc-product {
    background: #fff;
    border: 1px solid var(--nc-border);
    border-radius: 8px;
    padding: 32px 24px;
    position: relative;
    display: flex;
    flex-direction: column;
}
.nc-product-featured {
    border-color: var(--nc-blue);
    border-width: 2px;
    box-shadow: 0 4px 12px rgba(0, 100, 210, 0.08);
}
.nc-product-tag {
    position: absolute;
    top: -12px;
    left: 24px;
    background: var(--nc-blue);
    color: #fff;
    font-size: 12px;
    padding: 2px 12px;
    border-radius: 12px;
}
.nc-product-title {
    font-size: 24px;
    font-weight: 700;
    margin: 0 0 8px 0;
    color: var(--nc-text);
}
.nc-product-tagline {
    font-size: 14px;
    color: var(--nc-text-sub);
    margin: 0 0 16px 0;
}
.nc-product-meta {
    font-size: 12px;
    color: var(--nc-text-weak);
    margin: 0 0 16px 0;
    padding: 8px 12px;
    background: var(--nc-bg-gray);
    border-radius: 4px;
}
.nc-product ul {
    list-style: none;
    padding: 0;
    margin: 0 0 16px 0;
    flex-grow: 1;
}
.nc-product li {
    font-size: 13px;
    color: var(--nc-text-sub);
    padding: 4px 0;
    padding-left: 20px;
    position: relative;
}
.nc-product li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--nc-blue);
    font-weight: bold;
}
.nc-product-li-not::before {
    content: "✗";
    color: var(--nc-text-weak);
}
.nc-product-cta {
    display: inline-block;
    color: var(--nc-blue) !important;
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
}

/* === CTA Banner === */
.nc-cta-banner {
    padding: 64px 24px;
    background: #e6f4ff;
    text-align: center;
}
.nc-cta-banner h2 {
    font-size: 28px;
    font-weight: 600;
    margin: 0 0 16px 0;
    color: var(--nc-text);
}
.nc-cta-banner p {
    font-size: 16px;
    color: var(--nc-text-sub);
    margin: 0 0 24px 0;
    max-width: 640px;
    margin-left: auto;
    margin-right: auto;
}

/* === Comparison Table === */
.nc-table-wrap {
    overflow-x: auto;
    border: 1px solid var(--nc-border);
    border-radius: 8px;
}
.nc-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}
.nc-table th, .nc-table td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--nc-border);
}
.nc-table th {
    background: var(--nc-bg-gray);
    font-weight: 600;
    color: var(--nc-text);
}
.nc-table tr:last-child td {
    border-bottom: none;
}
.nc-table-check { color: var(--nc-blue); font-weight: bold; }
.nc-table-cross { color: var(--nc-text-weak); }

/* === FAQ Accordion (CSS only) === */
.nc-faq {
    max-width: 800px;
    margin: 0 auto;
}
.nc-faq-item {
    border: 1px solid var(--nc-border);
    border-radius: 8px;
    margin-bottom: 12px;
    background: #fff;
}
.nc-faq-q {
    padding: 16px 20px;
    font-weight: 600;
    cursor: pointer;
    color: var(--nc-text);
    list-style: none;
    position: relative;
}
.nc-faq-q::-webkit-details-marker { display: none; }
.nc-faq-q::after {
    content: "+";
    position: absolute;
    right: 20px;
    font-weight: 400;
    color: var(--nc-blue);
}
.nc-faq-item[open] .nc-faq-q::after {
    content: "−";
}
.nc-faq-a {
    padding: 0 20px 16px 20px;
    color: var(--nc-text-sub);
    font-size: 14px;
    line-height: 1.7;
}

/* === Architecture Diagram === */
.nc-architecture {
    background: var(--nc-bg-gray);
    padding: 32px;
    border-radius: 8px;
    border: 1px solid var(--nc-border);
}
.nc-architecture-step {
    background: #fff;
    border: 1px solid var(--nc-border);
    border-radius: 8px;
    padding: 16px 20px;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 16px;
}
.nc-architecture-step:last-child { margin-bottom: 0; }
.nc-architecture-num {
    background: var(--nc-blue);
    color: #fff;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    flex-shrink: 0;
}
.nc-architecture-text { flex-grow: 1; }
.nc-architecture-text strong { color: var(--nc-text); display: block; margin-bottom: 4px; }
.nc-architecture-text span { color: var(--nc-text-sub); font-size: 13px; }
.nc-architecture-arrow {
    text-align: center;
    color: var(--nc-blue);
    font-size: 20px;
    margin: 4px 0;
}

/* === Scenario Card (带"演示场景"标签) === */
.nc-scenario-tag {
    display: inline-block;
    background: #fff7e6;
    color: #d46b08;
    font-size: 11px;
    padding: 2px 8px;
    border-radius: 4px;
    margin-bottom: 12px;
    border: 1px solid #ffe58f;
}

/* === Footer (统一, 10 页面都用) === */
.nc-footer {
    background: var(--nc-bg-gray);
    border-top: 1px solid var(--nc-border);
    padding: 48px 24px 32px;
    color: var(--nc-text-sub);
    font-size: 13px;
}
.nc-footer-inner { max-width: 1200px; margin: 0 auto; }
.nc-footer-cols {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 32px;
    margin-bottom: 32px;
}
.nc-footer h4 {
    color: var(--nc-text);
    font-size: 14px;
    margin: 0 0 12px 0;
}
.nc-footer ul { list-style: none; padding: 0; margin: 0; }
.nc-footer li { padding: 4px 0; }
.nc-footer a { color: var(--nc-text-sub); text-decoration: none; }
.nc-footer a:hover { color: var(--nc-blue); }
.nc-footer-bottom {
    border-top: 1px solid var(--nc-border);
    padding-top: 16px;
    text-align: center;
    color: var(--nc-text-weak);
}

/* === Page Header (子页 H1 banner, 与首页区分) === */
.nc-page-header {
    background: var(--nc-bg-gray);
    padding: 48px 24px 40px;
    text-align: center;
    border-bottom: 1px solid var(--nc-border);
}
.nc-page-header h1 {
    font-size: 36px;
    font-weight: 700;
    margin: 0 0 12px 0;
    color: var(--nc-text);
}
.nc-page-header p {
    font-size: 16px;
    color: var(--nc-text-sub);
    margin: 0;
    max-width: 720px;
    margin-left: auto;
    margin-right: auto;
}

/* === 响应式 === */
@media (max-width: 768px) {
    .nc-hero h1 { font-size: 28px; }
    .nc-hero-sub { font-size: 16px; }
    .nc-hero-grid { grid-template-columns: 1fr; }
    .nc-grid-4, .nc-grid-3, .nc-grid-2 { grid-template-columns: 1fr; }
    .nc-footer-cols { grid-template-columns: 1fr; }
    .nc-nav { display: none; }
    .nc-page-header h1 { font-size: 28px; }
    .nc-section, .nc-section-gray { padding: 48px 16px; }
    .nc-table { font-size: 13px; }
    .nc-table th, .nc-table td { padding: 8px 10px; }
}