:root {
    --color-primary: #2b2a2a;
    --color-primary-dark: #0f1012;
    --color-accent: #c44536;
    --color-surface: #f5f1e8;
    --color-text: #1a1a1a;
    --rgb-primary: 43,42,42;
    --rgb-accent: 196,69,54;

    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 18px;
    --radius-xl: 26px;

    --shadow-sm: 0 1px 0 rgba(17, 24, 39, 0.08);
    --shadow-md: 0 12px 28px rgba(10, 10, 12, 0.12), 0 2px 0 rgba(255, 255, 255, 0.55) inset;
    --shadow-lg: 0 22px 60px rgba(10, 10, 12, 0.18), 0 10px 22px rgba(196, 69, 54, 0.12), 0 2px 0 rgba(255, 255, 255, 0.6) inset;

    --space-section: 3.25rem;
    --space-card: 1.1rem;
    --space-gap: 1.1rem;

    --transition: 0.52s cubic-bezier(0.22, 1, 0.36, 1);
    --heading-weight: 750;
    --body-line-height: 1.78;
}

/* 基础覆盖 */
body {
    color: var(--color-text);
    line-height: var(--body-line-height);
    background:
        radial-gradient(1200px 600px at 12% -10%, rgba(196, 69, 54, 0.10), transparent 55%),
        radial-gradient(900px 500px at 86% 0%, rgba(17, 24, 39, 0.08), transparent 55%),
        linear-gradient(180deg, #f5f1e8 0%, #f7f3eb 32%, #f2eee5 100%);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}
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-xl);
    box-shadow:
        0 1px 0 rgba(255, 255, 255, 0.7) inset,
        0 12px 30px rgba(12, 12, 14, 0.12),
        0 0 0 1px rgba(26, 26, 26, 0.08);
    padding: var(--space-card);
    transition:
        transform var(--transition),
        box-shadow var(--transition),
        border-color var(--transition),
        background var(--transition),
        filter var(--transition);
    background:
        radial-gradient(120% 80% at 15% 0%, rgba(196, 69, 54, 0.12), transparent 55%),
        linear-gradient(180deg, rgba(255, 255, 255, 0.74) 0%, rgba(245, 241, 232, 0.9) 100%);
    border: 1px solid rgba(26, 26, 26, 0.06);
}
.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition:
        transform var(--transition),
        box-shadow var(--transition),
        background var(--transition),
        color var(--transition),
        border-color var(--transition),
        filter var(--transition);
    text-shadow: 0 1px 0 rgba(255, 255, 255, 0.55);
    box-shadow:
        0 1px 0 rgba(255, 255, 255, 0.65) inset,
        0 10px 22px rgba(16, 16, 18, 0.10);
}
a:not([class]) {
    color: #2f2f2f;
    transition: var(--transition);
    text-decoration-thickness: 2px;
    text-underline-offset: 3px;
    background-image:
        linear-gradient(120deg, rgba(196, 69, 54, 0.35) 0%, rgba(196, 69, 54, 0.00) 70%);
}

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

/* news: featured-left */
/* 左大右小 (1大+2小) */
                .news-grid { display: grid; grid-template-columns: 2fr 1fr; grid-template-rows: auto auto; gap: var(--space-gap); }
                .news-grid > *:first-child { grid-row: span 2; }

/* features: grid-4 */
.feature-list { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-gap); }

/* 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; }

/* testimonials: stacked */
/* 垂直堆叠 */
                .testimonial-list { display: flex; flex-direction: column; gap: var(--space-gap); max-width: 720px; margin: 0 auto; }

/* partners: grid-6 */
.partner-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: var(--space-gap); 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: centered */
.cta-inner { text-align: center; max-width: 700px; margin: 0 auto; }

/* Page Layout: full-width */
/* 无侧边栏, 全宽 */
            .page-main { max-width: 1200px; margin: 0 auto; }

/* 条件性装饰 */
.card:hover, [class*="card"]:hover {
    transform: translateY(-6px);
    box-shadow:
        0 1px 0 rgba(255, 255, 255, 0.75) inset,
        0 26px 70px rgba(12, 12, 14, 0.22),
        0 14px 28px rgba(196, 69, 54, 0.14),
        0 0 0 1px rgba(196, 69, 54, 0.16);
    filter: saturate(1.03) contrast(1.01);
}
.card { border: 1px solid rgba(196, 69, 54, .18); }

header, .header, .navbar {
    box-shadow:
        0 1px 0 rgba(255, 255, 255, 0.7) inset,
        0 10px 28px rgba(10, 10, 12, 0.10),
        0 0 0 1px rgba(26, 26, 26, 0.06);
    background:
        linear-gradient(180deg, rgba(245, 241, 232, 0.92) 0%, rgba(245, 241, 232, 0.76) 100%);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: var(--transition);
}

/* 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: 3rem; --space-card: 1.0rem; --space-gap: 0.95rem; }
    .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; }
}