:root {
    --color-primary: #0f3d3e;
    --color-primary-dark: #062a2b;
    --color-accent: #00a3a3;
    --color-surface: #fbf3dd;
    --color-text: #0f1a1a;
    --rgb-primary: 15,61,62;
    --rgb-accent: 0,163,163;
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 18px;
    --radius-xl: 22px;
    --shadow-sm: 0 4px 10px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 8px rgba(0,0,0,0.06), 0 18px 38px -14px rgba(0,0,0,0.14);
    --shadow-lg: 0 6px 18px rgba(0,0,0,0.08), 0 28px 60px -20px rgba(0,0,0,0.18);
    --space-section: 4rem;
    --space-card: 1.5rem;
    --space-gap: 1.25rem;
    --transition: 0.42s cubic-bezier(0.22, 1, 0.36, 1);
    --heading-weight: 650;
    --body-line-height: 1.65;
    --strip-1: #ffffff;
    --strip-2: #fbf3dd;
    --strip-3: #0b2a2f;
    --strip-4: #ffffff;
}

/* 基础覆盖 */
body { color: var(--color-text); line-height: var(--body-line-height); background: var(--strip-1); }
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 4px 8px rgba(0,0,0,0.05), 0 20px 40px -10px rgba(0,0,0,0.12);
    padding: var(--space-card);
    transition: var(--transition);
    border: 1px solid rgba(0,0,0,0.06);
    background: rgba(255,255,255,0.78);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-md); transition: var(--transition); }
a:not([class]) { color: var(--color-primary); transition: var(--transition); text-shadow: 0 1px 0 rgba(255,255,255,0.65); }

a:not([class]):focus-visible,
.btn:focus-visible,
button[class*="btn"]:focus-visible {
    outline: 2px solid rgba(var(--rgb-accent), 0.55);
    outline-style: solid;
    outline-offset: 3px;
    border-radius: var(--radius-md);
}

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

/* news: masonry-2 */
/* 两列瀑布流 */
                .news-grid { column-count: 2; column-gap: var(--space-gap); }
                .news-grid .card { break-inside: avoid; margin-bottom: var(--space-gap); }
                .news-grid .card { box-shadow: 0 4px 10px rgba(0,0,0,0.05), 0 26px 54px -18px rgba(0,0,0,0.14); background: rgba(255,255,255,0.84); }
                .news-grid .card:hover { box-shadow: 0 10px 24px rgba(0,0,0,0.08), 0 34px 74px -26px rgba(0,0,0,0.18); }

/* features: grid-2 */
.feature-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: calc(var(--space-gap) * 1.5); }
.feature-list .card { background: rgba(255,255,255,0.82); border-color: rgba(0,0,0,0.05); box-shadow: 0 4px 8px rgba(0,0,0,0.05), 0 18px 46px -20px rgba(0,0,0,0.14); }

/* hero: minimal */
.hero { padding: 2rem 0; }
.hero-content { max-width: 560px; }
.hero { background: linear-gradient(135deg, var(--strip-1) 0%, var(--strip-2) 38%, rgba(0,163,163,0.08) 70%, var(--strip-1) 100%); border-bottom: 1px solid rgba(0,0,0,0.06); }

/* testimonials: carousel */
/* 单条轮播 */
                .testimonial-list { display: flex; overflow: hidden; } 
                .testimonial-list > * { flex: 0 0 100%; }
                .testimonial-list .card { background: rgba(255,255,255,0.78); box-shadow: 0 4px 8px rgba(0,0,0,0.05), 0 20px 45px -18px rgba(0,0,0,0.12); }

/* partners: grid-6 */
.partner-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: var(--space-gap); align-items: center; }
.partner-grid img,
.partner-grid svg { filter: drop-shadow(0 6px 14px rgba(0,0,0,0.10)); }

/* faq: single-column */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-list .card { background: rgba(255,255,255,0.82); border-color: rgba(0,0,0,0.05); box-shadow: 0 4px 8px rgba(0,0,0,0.05), 0 22px 52px -20px rgba(0,0,0,0.14); }

/* stats: grid-3 */
.stats-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); text-align: center; }
.stats-grid .card { background: rgba(255,255,255,0.80); box-shadow: 0 4px 8px rgba(0,0,0,0.05), 0 20px 40px -12px rgba(0,0,0,0.12); }

/* cta: split */
.cta-inner { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 2rem; }
.cta-inner .card { background: rgba(255,255,255,0.82); box-shadow: 0 6px 18px rgba(0,0,0,0.08), 0 30px 72px -26px rgba(0,0,0,0.18); }

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

/* 条件性装饰 */
.card:hover, [class*="card"]:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 10px rgba(0,0,0,0.07), 0 26px 60px -22px rgba(0,0,0,0.20), 0 2px 0 rgba(0,163,163,0.10) inset;
}
.hero, [class*="hero"], section:first-of-type {
    background:
        linear-gradient(90deg, rgba(0,0,0,0.00) 0%, rgba(0,0,0,0.00) 20%, rgba(0,163,163,0.10) 50%, rgba(0,0,0,0.00) 80%),
        linear-gradient(135deg, #ffffff 0%, #fbf3dd 45%, rgba(0,163,163,0.14) 78%, #ffffff 100%);
    border-bottom: 1px solid rgba(0,0,0,0.06);
}
.card { border: 1px solid rgba(var(--rgb-primary), .12); }

/* subtle horizontal-strip look without changing layout */
section { background-clip: padding-box; }
section:nth-of-type(odd) { background-color: var(--strip-2); }
section:nth-of-type(even) { background-color: var(--strip-3); color: rgba(255,255,255,0.92); }
section:nth-of-type(even) .card,
section:nth-of-type(even) [class*="card"] {
    background: rgba(9,33,37,0.70);
    border-color: rgba(255,255,255,0.10);
    box-shadow: 0 4px 8px rgba(0,0,0,0.20), 0 24px 54px -22px rgba(0,0,0,0.35);
}
section:nth-of-type(even) a:not([class]) { color: rgba(255,255,255,0.92); text-shadow: 0 2px 16px rgba(0,163,163,0.22); }
section:nth-of-type(even) .btn,
section:nth-of-type(even) button[class*="btn"],
section:nth-of-type(even) a[class*="btn"] {
    box-shadow: 0 10px 22px rgba(0,0,0,0.22), 0 1px 0 rgba(255,255,255,0.10) inset;
}

header, .header, .navbar { background: transparent; }
header, .header, .navbar { border-bottom: 1px solid rgba(0,0,0,0.06); }

/* 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; --radius-lg: 16px; --radius-md: 12px; }
    .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; }
    .card, [class*="card"] { box-shadow: 0 3px 8px rgba(0,0,0,0.06), 0 18px 40px -18px rgba(0,0,0,0.14); }
}