:root {
    --color-primary: #6d28d9;
    --color-primary-dark: #4c1d95;
    --color-accent: #22d3ee;
    --color-surface: #f7f5ff;
    --color-text: #1e1b2e;
    --rgb-primary: 109,40,217;
    --rgb-accent: 34,211,238;
    --radius-sm: 10px;
    --radius-md: 18px;
    --radius-lg: 26px;
    --radius-xl: 34px;
    --shadow-sm: 0 2px 6px -1px rgba(76,29,149,.16), 0 1px 3px rgba(34,211,238,.14);
    --shadow-md: 0 12px 28px -12px rgba(76,29,149,.32), 0 6px 14px -8px rgba(14,116,144,.22), inset 0 1px 0 rgba(255,255,255,.75);
    --shadow-lg: 0 28px 56px -24px rgba(49,46,129,.44), 0 12px 24px -12px rgba(6,182,212,.26), inset 0 1px 0 rgba(255,255,255,.8);
    --space-section: 4rem;
    --space-card: 1.5rem;
    --space-gap: 1.25rem;
    --transition: 0.55s cubic-bezier(0.22, 1, 0.36, 1);
    --heading-weight: 600;
    --body-line-height: 1.65;
}

/* 基础覆盖 */
body {
    color: var(--color-text);
    line-height: var(--body-line-height);
    caret-color: #6d28d9;
    accent-color: #6d28d9;
    background-color: #f7f5ff;
    background-image:
        radial-gradient(ellipse at 6% -12%, rgba(109,40,217,.20), transparent 56%),
        radial-gradient(ellipse at 96% 4%, rgba(34,211,238,.18), transparent 52%),
        radial-gradient(ellipse at 48% 112%, rgba(245,158,11,.14), transparent 58%),
        linear-gradient(180deg, #fcfbff 0%, #f3efff 48%, #edf6ff 100%);
}
h1, h2, h3, h4 { font-weight: var(--heading-weight); color: #3b1f7a; text-shadow: 0 1px 0 rgba(255,255,255,.7); }
section, .section { padding-top: var(--space-section); padding-bottom: var(--space-section); }
.card, [class*="card"] {
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    padding: var(--space-card);
    transition: var(--transition);
    background-color: #ffffff;
    background-image:
        linear-gradient(158deg, #ffffff 0%, #faf8ff 38%, #eef4ff 74%, #e4f7fd 100%);
    border: 1px solid rgba(124,58,237,.16);
    color: #241f3d;
}
.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition: var(--transition);
    background-color: #6d28d9;
    background-image: linear-gradient(132deg, #a78bfa 0%, #7c3aed 26%, #6d28d9 50%, #2563eb 76%, #06b6d4 100%);
    color: #f8fafc;
    box-shadow: 0 12px 26px -10px rgba(109,40,217,.60), 0 4px 12px -6px rgba(6,182,212,.45), inset 0 1px 0 rgba(255,255,255,.38);
    text-shadow: 0 1px 2px rgba(30,27,46,.40);
}
a:not([class]) { color: #0e7490; text-decoration-color: rgba(34,211,238,.65); transition: var(--transition); }

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

/* news: featured-left */
/* 左大右小 (1大+2小) */
                .news-grid { display: grid; grid-template-columns: 2fr 1fr; grid-template-rows: auto auto; gap: var(--space-gap); }
                .news-grid > *:first-child {
                    grid-row: span 2;
                    background-image: linear-gradient(150deg, #8b5cf6 0%, #7c3aed 26%, #5b21b6 52%, #3730a3 78%, #1e1b4b 100%);
                    color: #ede9fe;
                    border-color: rgba(196,181,253,.42);
                    box-shadow: 0 30px 58px -22px rgba(49,46,129,.70), 0 12px 26px -14px rgba(109,40,217,.58), inset 0 1px 0 rgba(255,255,255,.22);
                    text-shadow: 0 1px 3px rgba(15,23,42,.40);
                }
                .news-grid > *:nth-child(2) {
                    background-image: linear-gradient(150deg, #f0fdff 0%, #cffafe 48%, #a5f3fc 100%);
                    border-color: rgba(34,211,238,.40);
                    box-shadow: 0 16px 34px -16px rgba(14,116,144,.48), inset 0 1px 0 rgba(255,255,255,.85);
                }
                .news-grid > *:nth-child(3) {
                    background-image: linear-gradient(150deg, #fffdf5 0%, #fef3c7 46%, #fde68a 100%);
                    border-color: rgba(245,158,11,.42);
                    box-shadow: 0 16px 34px -16px rgba(245,158,11,.50), inset 0 1px 0 rgba(255,255,255,.85);
                }

/* features: centered */
/* 居中大卡片 */
                .feature-list { display: flex; flex-direction: column; align-items: center; gap: calc(var(--space-gap) * 2); max-width: 720px; margin: 0 auto; }
                .feature-list > * {
                    background-image: linear-gradient(152deg, #fffbf5 0%, #ffedd5 42%, #fed7aa 78%, #fdba74 100%);
                    border-color: rgba(249,115,22,.30);
                    box-shadow: 0 18px 38px -18px rgba(234,88,12,.46), 0 6px 16px -10px rgba(109,40,217,.22), inset 0 1px 0 rgba(255,255,255,.9);
                }

/* hero: split */
/* 左文右图 */
                .hero-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; align-items: center; }

/* testimonials: masonry */
.testimonial-list { column-count: 2; column-gap: var(--space-gap); column-rule: 2px solid rgba(124,58,237,.14); }
                .testimonial-list > * {
                    break-inside: avoid;
                    margin-bottom: var(--space-gap);
                    background-image: linear-gradient(155deg, #fef7ff 0%, #fae8ff 40%, #e9d5ff 74%, #ddd6fe 100%);
                    border-color: rgba(192,38,211,.24);
                    box-shadow: 0 18px 38px -20px rgba(168,85,247,.55), 0 6px 14px -8px rgba(34,211,238,.25), inset 0 1px 0 rgba(255,255,255,.9);
                }

/* partners: grid-6 */
.partner-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: var(--space-gap); align-items: center; }
                .partner-grid > * {
                    border-radius: var(--radius-md);
                    background-image: linear-gradient(142deg, rgba(255,255,255,.96) 0%, rgba(238,242,255,.92) 48%, rgba(224,247,254,.92) 100%);
                    box-shadow: 0 10px 22px -12px rgba(76,29,149,.40), inset 0 0 0 1px rgba(34,211,238,.22), inset 0 1px 0 rgba(255,255,255,.9);
                    transition: var(--transition);
                }

/* faq: with-sidebar */
/* FAQ 左 + 联系信息右 */
                .faq-wrapper { display: grid; grid-template-columns: 2fr 1fr; gap: 2rem; }
                .faq-wrapper > * {
                    border-radius: var(--radius-lg);
                    background-image: linear-gradient(160deg, #ffffff 0%, #f6f2ff 46%, #eef6ff 82%, #e6fbff 100%);
                    box-shadow: 0 14px 32px -18px rgba(76,29,149,.38), inset 0 0 0 1px rgba(124,58,237,.20);
                    transition: var(--transition);
                }

/* stats: big-number */
/* 大数字居中 */
                .stats-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: 2rem; }
                .stats-grid .stat-value {
                    font-size: 3rem;
                    background-image: linear-gradient(118deg, #6d28d9 0%, #2563eb 34%, #06b6d4 64%, #f59e0b 100%);
                    -webkit-background-clip: text;
                    background-clip: text;
                    color: transparent;
                    -webkit-text-fill-color: transparent;
                    text-shadow: none;
                }

/* cta: full-bg */
.cta-section {
    background-color: #4c1d95;
    background-image:
        radial-gradient(ellipse at 12% 0%, rgba(255,255,255,.22), transparent 55%),
        linear-gradient(118deg, #312e81 0%, #4c1d95 22%, #6d28d9 46%, #0e7490 74%, #06b6d4 100%);
    color: #f0f9ff;
    padding: 4rem 2rem;
    border-radius: var(--radius-xl);
    box-shadow: inset 0 1px 0 rgba(255,255,255,.22), 0 34px 64px -32px rgba(49,46,129,.60);
    text-shadow: 0 2px 6px rgba(15,23,42,.40);
}

/* Page Layout: full-width */
/* 无侧边栏, 全宽 */
            .page-main { max-width: 1200px; margin: 0 auto; }

/* 条件性装饰 */
.card { border: 1px solid rgba(124,58,237,.18); }
.card:hover {
    border-color: rgba(34,211,238,.45);
    box-shadow: 0 22px 44px -22px rgba(76,29,149,.45), 0 10px 20px -12px rgba(6,182,212,.32), inset 0 1px 0 rgba(255,255,255,.85);
}
header, .header, .navbar {
    background-color: rgba(250,248,255,.78);
    background-image: linear-gradient(180deg, rgba(255,255,255,.90) 0%, rgba(243,239,255,.66) 60%, rgba(236,246,255,.52) 100%);
    backdrop-filter: blur(14px) saturate(150%);
    box-shadow: 0 6px 24px -18px rgba(76,29,149,.55);
}

/* 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; column-rule: none; }
    .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; }
}