:root {
    --color-primary: #6b705c;
    --color-primary-dark: #4a4f3e;
    --color-accent: #c44536;
    --color-surface: #f5f1e8;
    --color-text: #1a1a1a;
    --rgb-primary: 107,112,92;
    --rgb-accent: 196,69,54;
    --radius-sm: 10px;
    --radius-md: 18px;
    --radius-lg: 26px;
    --radius-xl: 36px;
    --shadow-sm: 0 2px 6px rgba(0,0,0,0.04), 0 1px 2px rgba(0,0,0,0.02);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.06), 0 2px 4px rgba(0,0,0,0.03);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.08), 0 4px 8px rgba(0,0,0,0.04);
    --space-section: 4.5rem;
    --space-card: 1.75rem;
    --space-gap: 1.5rem;
    --transition: 0.45s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --heading-weight: 700;
    --body-line-height: 1.6;
}

body {
    color: var(--color-text);
    line-height: var(--body-line-height);
    background: linear-gradient(135deg, #f5f1e8 0%, #f0ebdf 100%);
}

h1, h2, h3, h4 {
    font-weight: var(--heading-weight);
    color: #111;
}

section, .section {
    padding-top: var(--space-section);
    padding-bottom: var(--space-section);
    background: transparent;
}

.card, [class*="card"] {
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    padding: var(--space-card);
    transition: var(--transition);
    background: linear-gradient(145deg, #ffffff, #fcf9f2);
    border: 1px solid rgba(107,112,92,0.12);
}

.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition: var(--transition);
    background: linear-gradient(135deg, var(--color-accent), #a6392d);
    color: #fff;
    border: none;
    box-shadow: 0 4px 10px rgba(196,69,54,0.3);
}

.btn:hover, button[class*="btn"]:hover, a[class*="btn"]:hover {
    box-shadow: 0 6px 16px rgba(196,69,54,0.4);
    transform: translateY(-1px);
}

a:not([class]) {
    color: var(--color-primary);
    transition: var(--transition);
    border-bottom: 1px solid transparent;
}

a:not([class]):hover {
    color: var(--color-accent);
    border-bottom-color: currentColor;
}

/* ========== 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;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

/* features: horizontal */
.feature-list {
    display: flex;
    gap: var(--space-gap);
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    scrollbar-color: #6b705c #f0ebdf;
}
.feature-list > * {
    flex: 0 0 300px;
    scroll-snap-align: start;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
}

/* hero: left-aligned */
.hero-content {
    text-align: left;
    max-width: 600px;
}
.hero-content h1 {
    text-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

/* testimonials: carousel */
.testimonial-list {
    display: flex;
    overflow: hidden;
}
.testimonial-list > * {
    flex: 0 0 100%;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    background: linear-gradient(135deg, #ffffff, #fcf9f2);
}

/* partners: grid-4 */
.partner-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: calc(var(--space-gap) * 1.5);
    align-items: center;
}
.partner-grid img {
    filter: grayscale(0.3) opacity(0.8);
    transition: var(--transition);
}
.partner-grid img:hover {
    filter: none;
}

/* faq: with-sidebar */
.faq-wrapper {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 2rem;
}
.faq-wrapper > * {
    background: rgba(255,255,255,0.8);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow-md);
}

/* stats: grid-4 */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-gap);
    text-align: center;
}
.stats-grid .card {
    background: linear-gradient(180deg, #f5f1e8, #eceae0);
    border: 1px solid #d6d2c8;
    border-radius: var(--radius-xl);
}

/* cta: split */
.cta-inner {
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: center;
    gap: 2rem;
    background: linear-gradient(135deg, #6b705c, #4a4f3e);
    color: #fff;
    border-radius: var(--radius-xl);
    padding: 2.5rem;
    box-shadow: var(--shadow-lg);
}
.cta-inner .btn {
    background: #c44536;
    border: 2px solid #fff;
}

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

/* 条件性装饰 */
header, .header, .navbar {
    background: transparent;
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
}

/* 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; }
}