:root {
    --color-primary: #17324a;
    --color-primary-dark: #0f2233;
    --color-accent: #ffb020;
    --color-surface: #f5f7ff;
    --color-text: #0b1220;
    --rgb-primary: 23,50,74;
    --rgb-accent: 255,176,32;
    --radius-sm: 7px;
    --radius-md: 14px;
    --radius-lg: 18px;
    --radius-xl: 26px;
    --shadow-sm: 0 1px 0 rgba(15,34,51,0.08), 0 8px 26px rgba(15,34,51,0.10);
    --shadow-md: 0 1px 0 rgba(15,34,51,0.10), 0 14px 46px rgba(15,34,51,0.16);
    --shadow-lg: 0 0 0 1px rgba(255,176,32,0.25), 0 10px 30px rgba(2,6,23,0.25), 0 26px 70px rgba(2,6,23,0.18);
    --space-section: 4rem;
    --space-card: 1.5rem;
    --space-gap: 1.25rem;
    --transition: 0.55s cubic-bezier(0.16, 1, 0.3, 1);
    --heading-weight: 650;
    --body-line-height: 1.75;
    --color-border: rgba(16, 30, 49, 0.12);
    --color-glow: rgba(255, 176, 32, 0.35);
    --color-soft: rgba(245, 247, 255, 0.72);
    --color-hero-grad-1: rgba(23, 50, 74, 1);
    --color-hero-grad-2: rgba(255, 176, 32, 0.92);
    --color-hero-grad-3: rgba(13, 35, 58, 0.9);
}

body {
    color: var(--color-text);
    line-height: var(--body-line-height);
    background:
        radial-gradient(1200px 700px at 15% -10%, rgba(255, 176, 32, 0.16), transparent 55%),
        radial-gradient(900px 600px at 95% 10%, rgba(23, 50, 74, 0.18), transparent 52%),
        linear-gradient(180deg, rgba(245, 247, 255, 1), rgba(245, 247, 255, 0.92));
}

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);
    padding: var(--space-card);
    transition:
        transform 520ms cubic-bezier(0.16, 1, 0.3, 1),
        box-shadow 520ms cubic-bezier(0.16, 1, 0.3, 1),
        background 520ms cubic-bezier(0.16, 1, 0.3, 1),
        border-color 520ms cubic-bezier(0.16, 1, 0.3, 1),
        color 520ms cubic-bezier(0.16, 1, 0.3, 1);
    background:
        linear-gradient(180deg, rgba(255,255,255,0.92), rgba(255,255,255,0.75));
    border: 1px solid rgba(16, 30, 49, 0.10);
    box-shadow:
        0 1px 0 rgba(15,34,51,0.10),
        0 10px 26px rgba(15,34,51,0.10),
        0 26px 70px rgba(2, 6, 23, 0.10);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    opacity: 0.98;
}

.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition:
        transform 520ms cubic-bezier(0.16, 1, 0.3, 1),
        box-shadow 520ms cubic-bezier(0.16, 1, 0.3, 1),
        background-color 520ms cubic-bezier(0.16, 1, 0.3, 1),
        border-color 520ms cubic-bezier(0.16, 1, 0.3, 1),
        color 520ms cubic-bezier(0.16, 1, 0.3, 1),
        filter 520ms cubic-bezier(0.16, 1, 0.3, 1);
    border: 1px solid rgba(255, 176, 32, 0.35);
    background-image:
        linear-gradient(180deg, rgba(255,176,32,0.96), rgba(255,176,32,0.78));
    color: rgba(10, 20, 32, 0.98);
    text-shadow: 0 1px 0 rgba(255,255,255,0.45);
    box-shadow:
        0 1px 0 rgba(255,255,255,0.55),
        0 12px 30px rgba(255, 176, 32, 0.18),
        0 26px 70px rgba(2, 6, 23, 0.10);
    filter: saturate(1.05);
    opacity: 0.98;
}

a:not([class]) {
    color: var(--color-primary);
    transition: var(--transition);
    text-shadow: 0 1px 0 rgba(255,255,255,0.35);
}

a:not([class]):focus-visible,
.btn:focus-visible,
button[class*="btn"]:focus-visible,
a[class*="btn"]:focus-visible {
    outline: 2px solid rgba(255,176,32,0.65);
    outline-offset: 3px;
    border-radius: var(--radius-md);
}

.card:hover, [class*="card"]:hover {
    transform: translateY(-5px);
    box-shadow:
        0 0 0 1px rgba(255,176,32,0.34),
        0 12px 34px rgba(2, 6, 23, 0.22),
        0 30px 90px rgba(2, 6, 23, 0.20),
        0 0 45px rgba(255,176,32,0.14);
    background:
        radial-gradient(900px 240px at 10% 0%, rgba(255, 176, 32, 0.16), transparent 55%),
        linear-gradient(180deg, rgba(255,255,255,0.96), rgba(255,255,255,0.78));
    border-color: rgba(255,176,32,0.30);
}

.card:hover * ,
[class*="card"]:hover * {
    transition: color 520ms cubic-bezier(0.16, 1, 0.3, 1);
}

/* ========== 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);
                    box-shadow:
                        0 1px 0 rgba(15,34,51,0.10),
                        0 12px 34px rgba(15,34,51,0.12),
                        0 34px 90px rgba(2, 6, 23, 0.10);
                    background:
                        radial-gradient(700px 240px at 15% 0%, rgba(255,176,32,0.13), transparent 52%),
                        linear-gradient(180deg, rgba(255,255,255,0.93), rgba(255,255,255,0.74));
                    border-color: rgba(16, 30, 49, 0.12);
                }

/* features: horizontal */
/* 水平滚动 */
                .feature-list {
                    display: flex;
                    gap: var(--space-gap);
                    overflow-x: auto;
                    scroll-snap-type: x mandatory;
                    background:
                        linear-gradient(180deg, rgba(245, 247, 255, 0.30), rgba(245, 247, 255, 0.00));
                    border-radius: var(--radius-xl);
                    padding: 0.25rem;
                }
                .feature-list > * { flex: 0 0 300px; scroll-snap-align: start; }
                .feature-list > * .card,
                .feature-list > *[class*="card"] {
                    box-shadow:
                        0 1px 0 rgba(255,255,255,0.55),
                        0 14px 46px rgba(2, 6, 23, 0.10),
                        0 0 0 1px rgba(255,176,32,0.18);
                    border-color: rgba(255,176,32,0.22);
                }

/* hero: left-aligned */
.hero-content {
    text-align: left;
    max-width: 600px;
}
.hero-content h1,
.hero-content h2,
.hero-content h3 {
    letter-spacing: -0.02em;
    text-shadow:
        0 1px 0 rgba(255,255,255,0.45),
        0 18px 50px rgba(0,0,0,0.12);
}

/* testimonials: masonry */
.testimonial-list { column-count: 2; column-gap: var(--space-gap); }
                .testimonial-list > * {
                    break-inside: avoid;
                    margin-bottom: var(--space-gap);
                }
                .testimonial-list > * .card,
                .testimonial-list > *[class*="card"] {
                    background:
                        radial-gradient(620px 260px at 90% 0%, rgba(23, 50, 74, 0.14), transparent 55%),
                        linear-gradient(180deg, rgba(255,255,255,0.95), rgba(255,255,255,0.72));
                    border-color: rgba(16, 30, 49, 0.10);
                    box-shadow:
                        0 1px 0 rgba(15,34,51,0.10),
                        0 16px 50px rgba(15,34,51,0.12),
                        0 26px 90px rgba(2, 6, 23, 0.10);
                }

/* partners: grid-6 */
.partner-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: var(--space-gap);
    align-items: center;
}
.partner-grid > * {
    opacity: 0.92;
    filter: saturate(1.03) contrast(1.02);
}
.partner-grid > *:hover { opacity: 1; }

/* faq: single-column */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-list .card,
.faq-list [class*="card"] {
    background:
        linear-gradient(180deg, rgba(255,255,255,0.92), rgba(255,255,255,0.74));
    border-color: rgba(16, 30, 49, 0.10);
    box-shadow:
        0 1px 0 rgba(15,34,51,0.10),
        0 10px 26px rgba(15,34,51,0.10),
        0 22px 70px rgba(2, 6, 23, 0.10);
}

/* stats: grid-3 */
.stats-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); text-align: center; }
.stats-grid .card,
.stats-grid [class*="card"]{
    padding: calc(var(--space-card) * 0.95);
    background:
        radial-gradient(520px 220px at 30% 0%, rgba(255,176,32,0.16), transparent 55%),
        linear-gradient(180deg, rgba(255,255,255,0.95), rgba(255,255,255,0.70));
    border-color: rgba(255,176,32,0.18);
    box-shadow:
        0 1px 0 rgba(255,255,255,0.55),
        0 18px 55px rgba(2, 6, 23, 0.10),
        0 0 0 1px rgba(23, 50, 74, 0.10);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

/* cta: full-bg */
.cta-section {
    color: rgba(255,255,255,0.98);
    padding: 4rem 2rem;
    background:
        radial-gradient(1200px 500px at 10% 10%, rgba(255,176,32,0.35), transparent 55%),
        radial-gradient(900px 420px at 95% 0%, rgba(56,189,248,0.22), transparent 60%),
        linear-gradient(120deg, var(--color-hero-grad-1), var(--color-hero-grad-3) 55%, rgba(15,34,51,1) 100%);
    border-radius: var(--radius-xl);
    border: 1px solid rgba(255,176,32,0.22);
    box-shadow:
        0 0 0 1px rgba(255,176,32,0.10),
        0 24px 80px rgba(2, 6, 23, 0.30),
        0 6px 22px rgba(0,0,0,0.18);
    position: relative;
    overflow: hidden;
}
.cta-section::before{
    content: "";
    position: absolute;
    inset: -2px;
    background:
        conic-gradient(from 210deg at 50% 50%,
            rgba(255,176,32,0.00),
            rgba(255,176,32,0.32),
            rgba(23,50,74,0.00),
            rgba(56,189,248,0.18),
            rgba(255,176,32,0.00));
    opacity: 0.65;
    filter: blur(18px);
    pointer-events: none;
}
.cta-section > * { position: relative; z-index: 1; }
.cta-section .btn,
.cta-section button[class*="btn"],
.cta-section a[class*="btn"]{
    background-image:
        linear-gradient(180deg, rgba(255,176,32,1), rgba(255,176,32,0.78));
    border-color: rgba(255,255,255,0.25);
    color: rgba(10, 20, 32, 0.98);
    box-shadow:
        0 1px 0 rgba(255,255,255,0.55),
        0 18px 55px rgba(255,176,32,0.22),
        0 28px 90px rgba(2, 6, 23, 0.20);
}

/* 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(-4px); box-shadow: var(--shadow-lg); }

/* 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; }
}