:root {
    --color-primary: #0ea5e9;
    --color-primary-dark: #075985;
    --color-accent: #f97316;
    --color-surface: #f5f7ff;
    --color-text: #0f172a;
    --rgb-primary: 14,165,233;
    --rgb-accent: 249,115,22;

    --radius-sm: 3px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 18px;

    --shadow-sm:
        0 1px 0 rgba(15, 23, 42, .06),
        0 6px 16px rgba(2, 6, 23, .06);

    --shadow-md:
        0 10px 28px rgba(2, 6, 23, .10),
        0 3px 10px rgba(2, 6, 23, .06),
        0 0 0 1px rgba(var(--rgb-primary), .10);

    --shadow-lg:
        0 20px 50px rgba(2, 6, 23, .14),
        0 10px 24px rgba(2, 6, 23, .10),
        0 2px 8px rgba(2, 6, 23, .08),
        0 0 0 1px rgba(var(--rgb-primary), .12);

    --space-section: 3rem;
    --space-card: 1.25rem;
    --space-gap: 1rem;

    --transition: 420ms cubic-bezier(0.16, 1, 0.3, 1);
    --heading-weight: 800;
    --body-line-height: 1.65;

    --shadow-glow-strong: 0 0 28px rgba(var(--rgb-accent), .45);
    --shadow-glow-hover: 0 0 44px rgba(var(--rgb-accent), .62);
    --text-glow: 0 0 18px rgba(var(--rgb-accent), .18);
}

body { color: var(--color-text); line-height: var(--body-line-height); }

h1, h2, h3, h4 { font-weight: var(--heading-weight); text-shadow: none; }

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

.card, [class*="card"] {
    border-radius: var(--radius-lg);
    box-shadow:
        0 18px 46px rgba(2, 6, 23, .14),
        0 8px 18px rgba(2, 6, 23, .10),
        0 1px 0 rgba(255, 255, 255, .72) inset,
        0 0 0 1px rgba(var(--rgb-primary), .14);
    padding: var(--space-card);
    transition:
        box-shadow var(--transition),
        transform 420ms cubic-bezier(0.16, 1, 0.3, 1),
        border-color 420ms cubic-bezier(0.16, 1, 0.3, 1),
        filter 420ms cubic-bezier(0.16, 1, 0.3, 1),
        background 420ms cubic-bezier(0.16, 1, 0.3, 1);
}

.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition:
        box-shadow var(--transition),
        transform 420ms cubic-bezier(0.16, 1, 0.3, 1),
        color var(--transition),
        background var(--transition),
        border-color var(--transition),
        opacity var(--transition);
}

a:not([class]) { color: var(--color-primary); transition: var(--transition); }
a:not([class]):hover { color: var(--color-accent); }

section:first-of-type,
.hero, [class*="hero"], section:first-of-type {
    background:
        radial-gradient(900px 420px at 14% 15%, rgba(var(--rgb-accent), .22), transparent 55%),
        radial-gradient(780px 360px at 85% 10%, rgba(var(--rgb-primary), .22), transparent 52%),
        linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
}

.card { border: 1px solid rgba(var(--rgb-accent), .18); border-style: solid; }

@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; }
}

/* ========== 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);
    background:
        linear-gradient(180deg, rgba(255, 255, 255, .78), rgba(255, 255, 255, .60));
    border-color: rgba(var(--rgb-primary), .16);
}
.news-grid .card:hover {
    box-shadow:
        0 24px 66px rgba(2, 6, 23, .18),
        0 12px 26px rgba(2, 6, 23, .12),
        0 0 0 1px rgba(var(--rgb-accent), .24),
        var(--shadow-glow-hover);
}

/* features: grid-3 */
.feature-list {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-gap);
}
.feature-list .card {
    background:
        radial-gradient(700px 240px at 20% 0%, rgba(var(--rgb-accent), .18), transparent 50%),
        linear-gradient(180deg, rgba(255, 255, 255, .86), rgba(255, 255, 255, .62));
    border-color: rgba(var(--rgb-primary), .12);
}
.feature-list .card:hover {
    box-shadow:
        0 26px 70px rgba(2, 6, 23, .18),
        0 12px 26px rgba(2, 6, 23, .12),
        0 0 0 1px rgba(var(--rgb-accent), .26),
        var(--shadow-glow-hover);
    filter: saturate(1.08);
}

/* hero: left-aligned */
.hero-content { text-align: left; max-width: 600px; }
.hero-content h1, .hero-content h2, .hero-content h3 {
    text-shadow: 0 0 22px rgba(var(--rgb-accent), .16);
}

/* testimonials: grid-3 */
.testimonial-list {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-gap);
}
.testimonial-list .card {
    background:
        linear-gradient(180deg, rgba(255, 255, 255, .82), rgba(255, 255, 255, .58)),
        radial-gradient(520px 180px at 100% 0%, rgba(var(--rgb-primary), .18), transparent 55%);
    border-color: rgba(var(--rgb-primary), .14);
}
.testimonial-list .card:hover {
    box-shadow:
        0 24px 64px rgba(2, 6, 23, .18),
        0 10px 24px rgba(2, 6, 23, .12),
        0 0 0 1px rgba(var(--rgb-accent), .24),
        0 0 24px rgba(var(--rgb-primary), .22),
        var(--shadow-glow-hover);
}

/* partners: grid-6 */
.partner-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: var(--space-gap);
    align-items: center;
}
.partner-grid .card, .partner-grid [class*="card"] {
    box-shadow:
        0 14px 40px rgba(2, 6, 23, .12),
        0 6px 16px rgba(2, 6, 23, .08),
        0 0 0 1px rgba(var(--rgb-primary), .12);
    background:
        linear-gradient(180deg, rgba(255, 255, 255, .82), rgba(255, 255, 255, .58));
    border-radius: var(--radius-sm);
    border-color: rgba(var(--rgb-accent), .16);
}
.partner-grid .card:hover, .partner-grid [class*="card"]:hover {
    box-shadow:
        0 18px 50px rgba(2, 6, 23, .16),
        0 10px 22px rgba(2, 6, 23, .10),
        0 0 0 1px rgba(var(--rgb-accent), .26),
        var(--shadow-glow-hover);
}

/* faq: single-column */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-list .card, .faq-list [class*="card"] {
    background:
        radial-gradient(620px 260px at 10% 0%, rgba(var(--rgb-accent), .16), transparent 56%),
        linear-gradient(180deg, rgba(255, 255, 255, .84), rgba(255, 255, 255, .62));
    border-radius: var(--radius-xl);
    border-color: rgba(var(--rgb-primary), .14);
    box-shadow:
        0 20px 56px rgba(2, 6, 23, .14),
        0 8px 18px rgba(2, 6, 23, .10),
        0 0 0 1px rgba(var(--rgb-primary), .14);
}
.faq-list .card:hover, .faq-list [class*="card"]:hover {
    box-shadow:
        0 26px 72px rgba(2, 6, 23, .18),
        0 12px 26px rgba(2, 6, 23, .12),
        0 0 0 1px rgba(var(--rgb-accent), .26),
        var(--shadow-glow-hover);
}

/* stats: inline */
/* 水平排列 */
.stats-grid { display: flex; justify-content: center; gap: 3rem; }
.stats-grid .card, .stats-grid [class*="card"] {
    background:
        linear-gradient(135deg, rgba(var(--rgb-accent), .15), rgba(var(--rgb-primary), .10)),
        linear-gradient(180deg, rgba(255, 255, 255, .86), rgba(255, 255, 255, .60));
    border-color: rgba(var(--rgb-accent), .16);
    box-shadow:
        0 16px 44px rgba(2, 6, 23, .13),
        0 7px 16px rgba(2, 6, 23, .09),
        0 0 0 1px rgba(var(--rgb-primary), .12);
    border-radius: var(--radius-md);
}
.stats-grid .card:hover, .stats-grid [class*="card"]:hover {
    box-shadow:
        0 24px 64px rgba(2, 6, 23, .18),
        0 12px 26px rgba(2, 6, 23, .12),
        0 0 0 1px rgba(var(--rgb-accent), .28),
        0 0 26px rgba(var(--rgb-accent), .30),
        var(--shadow-glow-hover);
}

/* cta: split */
.cta-inner {
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: center;
    gap: 2rem;
}
.cta-inner .card, .cta-inner [class*="card"] {
    background:
        radial-gradient(780px 280px at 18% 0%, rgba(var(--rgb-accent), .20), transparent 55%),
        radial-gradient(620px 240px at 92% 15%, rgba(var(--rgb-primary), .18), transparent 55%),
        linear-gradient(180deg, rgba(255, 255, 255, .86), rgba(255, 255, 255, .60));
    border-color: rgba(var(--rgb-accent), .18);
    border-radius: var(--radius-xl);
    box-shadow:
        0 22px 60px rgba(2, 6, 23, .16),
        0 9px 20px rgba(2, 6, 23, .10),
        0 0 0 1px rgba(var(--rgb-accent), .14);
}
.cta-inner .card:hover, .cta-inner [class*="card"]:hover {
    box-shadow:
        0 30px 78px rgba(2, 6, 23, .20),
        0 12px 28px rgba(2, 6, 23, .12),
        0 0 0 1px rgba(var(--rgb-accent), .30),
        var(--shadow-glow-hover);
    filter: saturate(1.06);
}

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

/* Base hover glow (applies without altering layout) */
.card:hover, [class*="card"]:hover {
    box-shadow:
        0 28px 82px rgba(2, 6, 23, .20),
        0 14px 30px rgba(2, 6, 23, .12),
        0 0 0 1px rgba(var(--rgb-accent), .30),
        0 0 24px rgba(var(--rgb-accent), .22),
        var(--shadow-glow-hover);
    filter: saturate(1.06);
}

/* Subtle pulsing animation */
@keyframes glowPulse {
    0%, 100% { box-shadow: var(--shadow-md), 0 0 0 1px rgba(var(--rgb-accent), .00); }
    50% { box-shadow: var(--shadow-md), 0 0 26px rgba(var(--rgb-accent), .22); }
}

.card {
    animation: none;
}

.card:hover {
    animation: glowPulse 1.6s ease-in-out infinite;
}