:root {
    --color-primary: #0ea5e9;
    --color-primary-dark: #0284c7;
    --color-accent: #f97316;
    --color-surface: #fff7e6;
    --color-text: #0b1220;
    --rgb-primary: 14,165,233;
    --rgb-accent: 249,115,22;
    --radius-sm: 10px;
    --radius-md: 14px;
    --radius-lg: 18px;
    --radius-xl: 22px;
    --shadow-sm: 0 6px 18px rgba(2,132,199,.18), 0 2px 6px rgba(11,18,32,.10);
    --shadow-md: 0 14px 34px rgba(2,132,199,.22), 0 8px 18px rgba(11,18,32,.12), 0 2px 0 rgba(249,115,22,.10) inset;
    --shadow-lg: 0 26px 60px rgba(2,132,199,.26), 0 16px 32px rgba(11,18,32,.16), 0 3px 0 rgba(249,115,22,.14) inset;
    --space-section: 5rem;
    --space-card: 2rem;
    --space-gap: 1.5rem;
    --transition: 0.55s cubic-bezier(0.22, 1, 0.36, 1);
    --heading-weight: 700;
    --body-line-height: 1.65;
    --strip-white: #ffffff;
    --strip-cream: #fff3d4;
    --strip-dark: #071225;
    --strip-dark-2: #0b1a35;
    --edge-glow: rgba(14,165,233,.30);
}

/* 基础覆盖 */
body { color: var(--color-text); line-height: var(--body-line-height); background: linear-gradient(180deg, rgba(255,255,255,1) 0%, rgba(255,247,230,1) 55%, rgba(255,255,255,1) 100%); }
h1, h2, h3, h4 { font-weight: var(--heading-weight); letter-spacing: -0.01em; }
section, .section {
    padding-top: var(--space-section);
    padding-bottom: var(--space-section);
    background-image:
        linear-gradient(180deg, rgba(255,255,255,.88), rgba(255,255,255,.88)),
        linear-gradient(90deg, rgba(14,165,233,.12) 0%, rgba(249,115,22,.12) 100%);
    background-blend-mode: overlay;
}
.card, [class*="card"] {
    border-radius: var(--radius-lg);
    box-shadow:
        0 20px 50px rgba(2,132,199,.18),
        0 10px 24px rgba(11,18,32,.12),
        0 1px 0 rgba(255,255,255,.9) inset,
        0 -1px 0 rgba(249,115,22,.08) inset;
    padding: var(--space-card);
    transition: var(--transition);
    border: 1px solid rgba(2,132,199,.14);
    background:
        radial-gradient(1200px 400px at 10% 0%, rgba(14,165,233,.16) 0%, rgba(14,165,233,0) 55%),
        radial-gradient(900px 380px at 100% 0%, rgba(249,115,22,.14) 0%, rgba(249,115,22,0) 52%),
        linear-gradient(180deg, rgba(255,255,255,.92), rgba(255,255,255,.78));
}
.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition: var(--transition);
    box-shadow:
        0 14px 30px rgba(2,132,199,.18),
        0 6px 14px rgba(11,18,32,.12),
        0 0 0 1px rgba(14,165,233,.22) inset;
    border: 1px solid rgba(14,165,233,.24);
    background:
        linear-gradient(135deg, rgba(14,165,233,.98) 0%, rgba(2,132,199,.98) 55%, rgba(249,115,22,.92) 100%);
    color: #ffffff;
    text-shadow: 0 1px 0 rgba(0,0,0,.25);
}
a:not([class]) {
    color: var(--color-primary);
    transition: var(--transition);
    text-shadow: 0 1px 0 rgba(255,255,255,.35);
}
a:not([class]):hover { color: var(--color-primary-dark); }

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

/* news: featured-top */
/* 首篇横跨全宽 */
                .news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); }
                .news-grid > *:first-child { grid-column: span 3; }

/* 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; }

/* 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); }
                .testimonial-list > * { break-inside: avoid; margin-bottom: var(--space-gap); }

/* partners: centered */
.partner-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: 2rem; }

/* faq: with-sidebar */
/* FAQ 左 + 联系信息右 */
                .faq-wrapper { display: grid; grid-template-columns: 2fr 1fr; gap: 2rem; }

/* stats: grid-4 */
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-gap); text-align: center; }

/* cta: centered */
.cta-inner { text-align: center; max-width: 700px; margin: 0 auto; }

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

/* 条件性装饰 */
.hero, [class*="hero"], section:first-of-type {
    background:
        linear-gradient(90deg, rgba(255,255,255,.96) 0%, rgba(255,243,212,.96) 38%, rgba(7,18,37,.96) 100%),
        radial-gradient(900px 240px at 20% 0%, rgba(14,165,233,.22) 0%, rgba(14,165,233,0) 60%),
        radial-gradient(800px 260px at 85% 10%, rgba(249,115,22,.20) 0%, rgba(249,115,22,0) 58%);
    border-radius: 0;
    box-shadow:
        0 1px 0 rgba(255,255,255,.8) inset,
        0 -1px 0 rgba(2,132,199,.10) inset;
}
.card { border-left: 4px solid rgba(14,165,233,.95); border-image: linear-gradient(180deg, rgba(14,165,233,.95) 0%, rgba(249,115,22,.90) 100%) 1; }
header, .header, .navbar {
    background: transparent;
    backdrop-filter: blur(10px) saturate(1.1);
    -webkit-backdrop-filter: blur(10px) saturate(1.1);
    border-bottom: 1px solid rgba(14,165,233,.10);
    box-shadow: 0 10px 30px rgba(2,132,199,.08);
}
::selection { background: rgba(14,165,233,.28); color: var(--color-text); }
.caret-color { caret-color: var(--color-accent); }
input, textarea, select { caret-color: var(--color-accent); accent-color: var(--color-accent); }

/* 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; }
    section, .section { background-image: linear-gradient(180deg, rgba(255,255,255,.92), rgba(255,255,255,.92)); }
}
@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; }
    .card, [class*="card"] {
        border-radius: 16px;
        box-shadow:
            0 18px 44px rgba(2,132,199,.16),
            0 10px 22px rgba(11,18,32,.11),
            0 1px 0 rgba(255,255,255,.86) inset;
    }
    .btn, button[class*="btn"], a[class*="btn"] {
        box-shadow:
            0 12px 28px rgba(2,132,199,.16),
            0 6px 14px rgba(11,18,32,.10),
            0 0 0 1px rgba(14,165,233,.20) inset;
    }
}