:root {
    --color-primary: #c44536;
    --color-primary-dark: #6e1f16;
    --color-accent: #d4a373;
    --color-surface: #f5f1e8;
    --color-text: #1a1a1a;
    --rgb-primary: 196,69,54;
    --rgb-accent: 212,163,115;
    --radius-sm: 2px;
    --radius-md: 4px;
    --radius-lg: 8px;
    --radius-xl: 12px;
    --shadow-sm: 0 1px 2px rgba(26,26,26,.05), 0 1px 3px rgba(26,26,26,.04);
    --shadow-md: 0 2px 4px rgba(26,26,26,.04), 0 16px 32px rgba(26,26,26,.08);
    --shadow-lg: 0 4px 8px rgba(26,26,26,.05), 0 32px 64px rgba(26,26,26,.12);
    --space-section: 5rem;
    --space-card: 2rem;
    --space-gap: 1.5rem;
    --transition: 0.5s cubic-bezier(0.22, 1, 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(900px 400px at 88% -10%, rgba(var(--rgb-primary), .07), transparent 60%), radial-gradient(700px 350px at -10% 110%, rgba(var(--rgb-accent), .08), transparent 60%), linear-gradient(180deg, #faf7f0 0%, var(--color-surface) 45%, #efe8d9 100%);
}
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: 0 0 0 1px rgba(26,26,26,.035), var(--shadow-md);
    padding: var(--space-card);
    transition: var(--transition);
    background: linear-gradient(145deg, #fefcf8 0%, var(--color-surface) 55%, #f0e8d8 100%);
}
.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition: var(--transition);
    background: linear-gradient(135deg, var(--color-primary) 0%, #a03428 55%, var(--color-primary-dark) 100%);
    color: #fdfbf7;
    box-shadow: 0 4px 14px rgba(var(--rgb-primary), .25), 0 1px 2px rgba(26,26,26,.08);
}
a:not([class]) {
    color: var(--color-primary);
    transition: var(--transition);
    text-decoration-color: rgba(var(--rgb-primary), .35);
    text-underline-offset: 4px;
}

/* ========== 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;
    box-shadow: inset 4px 0 0 var(--color-primary), var(--shadow-md);
}

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

/* hero: overlay */
.hero {
    position: relative;
    min-height: 70vh;
    display: flex;
    align-items: center;
}
.hero-content {
    position: relative;
    z-index: 1;
}

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

/* partners: scroll */
.partner-grid {
    display: flex;
    gap: 2rem;
    overflow: hidden;
    animation: partnerScroll 20s linear infinite;
}
@keyframes partnerScroll {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

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

/* stats: grid-4 */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-gap);
    text-align: center;
}

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

/* Page Layout: narrow-centered */
.page-main {
    max-width: 860px;
    margin: 0 auto;
}

/* 条件性装饰 */
.card:hover, [class*="card"]:hover {
    transform: translateY(-4px);
    box-shadow: inset 4px 0 0 var(--color-primary), 0 0 0 1px rgba(var(--rgb-primary), .12), var(--shadow-lg);
    background: linear-gradient(145deg, #fffdf9 0%, var(--color-surface) 60%, #f3eadb 100%);
}
.hero, [class*="hero"], section:first-of-type {
    background: radial-gradient(900px 420px at 82% 12%, rgba(var(--rgb-accent), .28), transparent 60%), radial-gradient(500px 300px at 12% 88%, rgba(0,0,0,.16), transparent 60%), linear-gradient(135deg, #b8402f 0%, var(--color-primary) 40%, #611e15 100%);
    box-shadow: inset 0 -60px 60px -30px rgba(0,0,0,.25);
}
header, .header, .navbar {
    box-shadow: 0 1px 2px rgba(26,26,26,.04), 0 4px 20px rgba(26,26,26,.06);
}

/* 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; }
}