:root {
    --color-primary: #2e3d52;
    --color-primary-dark: #1b2430;
    --color-accent: #f0b429;
    --color-surface: #f4f7fc;
    --color-text: #1f2a37;
    --rgb-primary: 46,61,82;
    --rgb-accent: 240,180,41;
    --radius-sm: 4px;
    --radius-md: 9px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --shadow-sm: 0 2px 6px -1px rgba(27,36,48,.22), 0 1px 2px rgba(240,180,41,.12);
    --shadow-md: 0 10px 24px -10px rgba(27,36,48,.38), 0 3px 9px -3px rgba(46,61,82,.22), inset 0 1px 0 rgba(255,255,255,.65);
    --shadow-lg: 0 28px 58px -22px rgba(27,36,48,.46), 0 10px 22px -12px rgba(46,61,82,.30), inset 0 0 0 1px rgba(240,180,41,.16);
    --space-section: 2rem;
    --space-card: 1rem;
    --space-gap: 0.75rem;
    --transition: 0.55s cubic-bezier(0.22, 0.61, 0.36, 1);
    --heading-weight: 700;
    --body-line-height: 1.6;
}

/* 基础覆盖 */
body {
    color: var(--color-text);
    line-height: var(--body-line-height);
    background: radial-gradient(125% 105% at 8% -12%, #e6edf9 0%, #f5f8fd 42%, #eaf0f8 78%, #e2e9f4 100%);
}
h1, h2, h3, h4 {
    font-weight: var(--heading-weight);
    color: #1b2430;
    text-shadow: 0 1px 0 rgba(255,255,255,.75);
}
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);
    transition: var(--transition);
    background: linear-gradient(158deg, #ffffff 0%, #f4f7fc 46%, #e8eef8 86%, #e2e9f4 100%);
}
.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition: var(--transition);
    background: linear-gradient(135deg, #f9d976 0%, #f0b429 42%, #dfa015 74%, #c98a0c 100%);
    color: #1b2430;
    box-shadow: 0 12px 26px -14px rgba(201,138,12,.72), 0 3px 8px -3px rgba(240,180,41,.45), inset 0 1px 0 rgba(255,255,255,.55);
}
a:not([class]) {
    color: #2e6f8e;
    text-decoration-color: rgba(240,180,41,.75);
    transition: var(--transition);
}

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

/* news: featured-top */
/* 首篇横跨全宽 */
                .news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); }
                .news-grid > *:first-child { grid-column: span 3; }

/* features: centered */
/* 居中大卡片 */
                .feature-list { display: flex; flex-direction: column; align-items: center; gap: calc(var(--space-gap) * 2); max-width: 720px; margin: 0 auto; }

/* hero: overlay */
/* 全屏背景+文字覆盖 */
                .hero { position: relative; min-height: 70vh; display: flex; align-items: center; }
                .hero-content { position: relative; z-index: 1; color: #f2f6fc; text-shadow: 0 2px 18px rgba(9,15,24,.55), 0 1px 2px rgba(9,15,24,.4); }

/* testimonials: masonry */
.testimonial-list { column-count: 2; column-gap: var(--space-gap); }
                .testimonial-list > * { break-inside: avoid; margin-bottom: var(--space-gap); }

/* partners: grid-4 */
.partner-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: calc(var(--space-gap) * 1.5); align-items: center; }

/* faq: single-column */
.faq-list { max-width: 800px; margin: 0 auto; }

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

/* cta: full-bg */
.cta-section {
    background: linear-gradient(128deg, #1b2430 0%, #252e3a 34%, #2e3d52 64%, #3d5876 100%);
    color: #f4f8fd;
    padding: 4rem 2rem;
    border-radius: var(--radius-xl);
    box-shadow: 0 34px 70px -30px rgba(16,23,33,.72), inset 0 1px 0 rgba(240,180,41,.28);
    text-shadow: 0 1px 14px rgba(8,13,21,.45);
}

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

/* 条件性装饰 */
.hero, [class*="hero"], section:first-of-type {
    background: linear-gradient(136deg, #1b2430 0%, #252e3a 28%, #2e3d52 54%, #3f5b7c 80%, #56789c 100%);
}

/* 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: 2rem; --space-card: 1rem; --space-gap: 0.75rem; }
    .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; }
}