:root {
    --color-primary: #6b705c;
    --color-primary-dark: #49594b;
    --color-accent: #c44536;
    --color-surface: #f5f1e8;
    --color-text: #1a1a1a;
    --rgb-primary: 107,112,92;
    --rgb-accent: 196,69,54;
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --shadow-sm: 0 3px 6px rgba(107,112,92,0.14), 0 1px 3px rgba(196,69,54,0.08);
    --shadow-md: 0 6px 12px rgba(107,112,92,0.12), 0 3px 6px rgba(196,69,54,0.1);
    --shadow-lg: 0 12px 24px rgba(107,112,92,0.10), 0 6px 12px rgba(196,69,54,0.12);
    --space-section: 3rem;
    --space-card: 1.2rem;
    --space-gap: 1rem;
    --transition: 0.55s cubic-bezier(0.4, 0, 0.2, 1);
    --heading-weight: 700;
    --body-line-height: 1.65;
}

body {
    color: var(--color-text);
    line-height: var(--body-line-height);
    background: radial-gradient(circle at top left, #f5f1e8 0%, #e6dfd5 100%);
}

h1, h2, h3, h4 {
    font-weight: var(--heading-weight);
    color: var(--color-primary-dark);
    text-shadow: 1px 1px 2px rgba(196,69,54,0.15);
}

section, .section {
    padding-top: var(--space-section);
    padding-bottom: var(--space-section);
    background: linear-gradient(135deg, #f9f6f0 0%, #f5f1e8 100%);
}

.card, [class*="card"] {
    border-radius: var(--radius-lg);
    box-shadow:
      0 4px 8px rgba(107,112,92,0.18),
      0 2px 4px rgba(196,69,54,0.12);
    padding: var(--space-card);
    transition: var(--transition);
    background: linear-gradient(145deg, #fefcf7, #f5f1e8);
    border-style: solid;
    border-color: transparent;
    border-image: linear-gradient(90deg, #c44536 0%, #6b705c 100%);
    border-image-slice: 1;
}

.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition: var(--transition);
    background: linear-gradient(90deg, #c44536 0%, #6b705c 100%);
    border-style: solid;
    border-color: transparent;
    border-image: linear-gradient(90deg, #6b705c 0%, #c44536 100%);
    border-image-slice: 1;
    color: #f5f1e8;
    box-shadow:
      0 3px 6px rgba(196,69,54,0.4),
      inset 0 -2px 4px rgba(107,112,92,0.3);
}

a:not([class]) {
    color: var(--color-primary);
    transition: var(--transition);
    text-decoration: none;
    border-bottom: 1.5px solid transparent;
    background-image: linear-gradient(90deg, #c44536 0%, #6b705c 100%);
    background-repeat: no-repeat;
    background-size: 0% 2px;
    background-position: 0 100%;
    transition: background-size 0.55s cubic-bezier(0.4, 0, 0.2, 1);
}

a:not([class]):hover,
a:not([class]):focus {
    background-size: 100% 2px;
    color: var(--color-accent);
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

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

/* news: grid-4 */
/* 四列紧凑网格 */
.news-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: calc(var(--space-gap) * 0.9);
}

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

/* hero: minimal */
.hero {
    padding: 3rem 0;
    background: radial-gradient(circle at center, #f5f1e8 0%, #e6dfd5 80%);
}

.hero-content {
    max-width: 560px;
    color: var(--color-primary-dark);
    text-shadow: 1px 1px 3px rgba(196,69,54,0.1);
}

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

/* partners: scroll */
/* 自动滚动 */
.partner-grid {
    display: flex;
    gap: 2.4rem;
    overflow: hidden;
    animation: partnerScroll 25s cubic-bezier(0.4, 0, 0.2, 1) infinite;
}

@keyframes partnerScroll {
    0% {
        transform: translateX(0);
    }
    100% {
        transform: translateX(-50%);
    }
}

/* faq: single-column */
.faq-list {
    max-width: 800px;
    margin: 0 auto;
    background: linear-gradient(180deg, #f5f1e8 0%, #ede8df 100%);
    border-radius: var(--radius-lg);
    box-shadow:
      0 4px 8px rgba(107,112,92,0.12),
      0 2px 4px rgba(196,69,54,0.08);
}

/* stats: big-number */
/* 大数字居中 */
.stats-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 2.4rem;
}

.stats-grid .stat-value {
    font-size: 3rem;
    color: var(--color-primary-dark);
    text-shadow: 1px 1px 4px rgba(196,69,54,0.15);
}

/* cta: full-bg */
.cta-section {
    background: linear-gradient(90deg, #6b705c 0%, #c44536 100%);
    color: #f5f1e8;
    padding: 4rem 2rem;
    box-shadow:
      inset 0 0 20px rgba(255,255,255,0.15);
}

/* Page Layout: full-width */
/* 无侧边栏, 全宽 */
.page-main {
    max-width: 1400px;
    margin: 0 auto;
    padding-left: 64px;
    padding-right: 64px;
}

/* 条件性装饰 */
.card {
    border-left: 4px solid transparent;
    border-image: linear-gradient(180deg, #c44536 0%, #6b705c 100%);
    border-image-slice: 1;
}

/* 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: 2.5rem;
        --space-card: 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;
    }
}