:root {
    --color-primary: #1f3a3d;
    --color-primary-dark: #14272a;
    --color-accent: #d5a96a;
    --color-surface: #f3efe9;
    --color-text: #1b1e1f;
    --rgb-primary: 31,58,61;
    --rgb-accent: 213,169,106;
    --radius-sm: 10px;
    --radius-md: 18px;
    --radius-lg: 24px;
    --radius-xl: 36px;
    --shadow-sm: 0 2px 4px rgba(31,58,61,.05), 0 1px 2px rgba(31,58,61,.03);
    --shadow-md: 0 8px 20px rgba(31,58,61,.08), 0 3px 6px rgba(31,58,61,.05), inset 0 1px 0 rgba(255,255,255,.8);
    --shadow-lg: 0 24px 40px rgba(31,58,61,.12), 0 8px 16px rgba(31,58,61,.08), inset 0 1px 0 rgba(255,255,255,.9);
    --space-section: 2.4rem;
    --space-card: 1.2rem;
    --space-gap: 0.9rem;
    --transition: 0.45s cubic-bezier(0.22, 1, 0.36, 1);
    --heading-weight: 800;
    --body-line-height: 1.75;
}

/* 基础覆盖 */
body {
    color: var(--color-text);
    line-height: var(--body-line-height);
    background-color: var(--color-surface);
    background-image: repeating-linear-gradient(
        180deg,
        #ffffff 0,
        #ffffff 70px,
        var(--color-surface) 70px,
        var(--color-surface) 140px
    );
}
h1, h2, h3, h4 { font-weight: var(--heading-weight); }
section, .section {
    padding-top: var(--space-section);
    padding-bottom: var(--space-section);
}
.card, [class*="card"] {
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    padding: var(--space-card);
    background-color: #ffffff;
    background-image: linear-gradient(145deg, #ffffff 0%, #f7f4ee 100%);
    transition: var(--transition);
}
.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}
a:not([class]) {
    color: var(--color-primary);
    transition: var(--transition);
}

/* ========== Section Layout Variants ========== */

/* news: list-view */
.news-grid {
    display: flex;
    flex-direction: column;
    gap: var(--space-gap);
}
.news-grid .card {
    display: grid;
    grid-template-columns: 280px 1fr;
}

/* features: grid-3 */
.feature-list {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-gap);
}

/* hero: minimal */
.hero {
    padding: 2rem 0;
}
.hero-content {
    max-width: 560px;
}

/* testimonials: grid-3 */
.testimonial-list {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-gap);
}

/* partners: grid-6 */
.partner-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: var(--space-gap);
    align-items: center;
}

/* faq: two-column */
.faq-list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-gap);
}

/* stats: inline */
.stats-grid {
    display: flex;
    justify-content: center;
    gap: 3rem;
}

/* cta: split */
.cta-inner {
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: center;
    gap: 2rem;
}

/* Page Layout: wide */
.page-main {
    max-width: 1400px;
    margin: 0 auto;
}

/* 条件性装饰 */
header, .header, .navbar {
    background-color: rgba(255, 255, 255, 0.8);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 24px rgba(31, 58, 61, 0.08), 0 2px 4px rgba(31, 58, 61, 0.04);
}

/* Responsive */
@media (max-width: 1024px) {
    .news-grid { grid-template-columns: repeat(2, 1fr) !important; }
    .feature-list { grid-template-columns: repeat(2, 1fr) !important; }
    .partner-grid { grid-template-columns: repeat(3, 1fr) !important; }
    .stats-grid { grid-template-columns: repeat(2, 1fr) !important; }
    .hero-inner { grid-template-columns: 1fr !important; }
}
@media (max-width: 640px) {
    :root {
        --space-section: 2.2rem;
        --space-card: 1.1rem;
        --space-gap: 0.8rem;
    }
    .news-grid { grid-template-columns: 1fr !important; }
    .feature-list { grid-template-columns: 1fr !important; }
    .faq-list { grid-template-columns: 1fr !important; }
    .testimonial-list { column-count: 1 !important; }
    .partner-grid { grid-template-columns: repeat(2, 1fr) !important; }
    .stats-grid { grid-template-columns: repeat(2, 1fr) !important; }
    .cta-inner { grid-template-columns: 1fr !important; }
}