:root {
    --color-primary: #0ea5a4;
    --color-primary-dark: #0b5f60;
    --color-accent: #f97316;
    --color-surface: #fff7e6;
    --color-text: #052a2b;
    --rgb-primary: 14,165,164;
    --rgb-accent: 249,115,22;
    --radius-sm: 10px;
    --radius-md: 16px;
    --radius-lg: 22px;
    --radius-xl: 30px;
    --shadow-sm: 0 1px 0 rgba(5,42,43,.06), 0 0 0 rgba(0,0,0,0);
    --shadow-md: 0 10px 26px rgba(2, 42, 44, .10), 0 2px 8px rgba(14,165,164,.10);
    --shadow-lg: 0 22px 60px rgba(2, 42, 44, .14), 0 10px 22px rgba(249,115,22,.10);
    --space-section: 5rem;
    --space-card: 1.25rem;
    --space-gap: 1.15rem;
    --transition: 260ms cubic-bezier(.2,.9,.2,1);
    --heading-weight: 850;
    --body-line-height: 1.8;
    --strip-cream: #fff1cc;
    --strip-white: #ffffff;
    --strip-dark: #071b22;
    --strip-dark-2: #0b2a33;
    --strip-border: rgba(5,42,43,.10);
    --card-stroke: rgba(5,42,43,.10);
    --card-glow: rgba(14,165,164,.22);
    --card-glow-2: rgba(249,115,22,.18);
    --focus-ring: rgba(14,165,164,.35);
    --accent-ink: rgba(249,115,22,.95);
}

/* 基础覆盖 */
body { color: var(--color-text); line-height: var(--body-line-height); background:
    radial-gradient(1000px 500px at 10% -10%, rgba(14,165,164,.12), rgba(14,165,164,0) 55%),
    radial-gradient(900px 520px at 90% 0%, rgba(249,115,22,.12), rgba(249,115,22,0) 52%),
    linear-gradient(180deg, #ffffff 0%, #fffdf7 35%, #fff7e6 100%);
}
h1, h2, h3, h4 { font-weight: var(--heading-weight); 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-xl);
    box-shadow:
        0 1px 0 rgba(255,255,255,.75),
        0 14px 32px rgba(5,42,43,.12),
        0 2px 10px rgba(14,165,164,.10),
        0 0 0 1px rgba(5,42,43,.08) inset;
    padding: var(--space-card);
    transition: transform var(--transition), box-shadow var(--transition), background var(--transition), border-color var(--transition), color var(--transition), filter var(--transition);
    background:
        radial-gradient(700px 240px at 10% 0%, rgba(14,165,164,.16), rgba(14,165,164,0) 55%),
        radial-gradient(520px 240px at 100% 20%, rgba(249,115,22,.14), rgba(249,115,22,0) 50%),
        linear-gradient(180deg, rgba(255,255,255,.92), rgba(255,255,255,.78));
    border: 1px solid rgba(5,42,43,.08);
}
.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition: transform var(--transition), box-shadow var(--transition), background var(--transition), color var(--transition), border-color var(--transition), filter var(--transition);
    box-shadow:
        0 1px 0 rgba(255,255,255,.7),
        0 10px 22px rgba(5,42,43,.10);
    border: 1px solid rgba(5,42,43,.10);
    background:
        linear-gradient(180deg, rgba(255,255,255,.94), rgba(255,255,255,.76));
    color: rgba(5,42,43,.92);
}
a:not([class]) { color: var(--color-primary); transition: color var(--transition), text-shadow var(--transition), filter var(--transition); }
a:not([class]):hover {
    color: #0b7d7b;
    text-shadow: 0 0 22px rgba(14,165,164,.28);
}

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

/* news: grid-3 */
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); }

/* features: grid-2 */
.feature-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: calc(var(--space-gap) * 1.5); }

/* hero: minimal */
.hero { padding: 2rem 0; }
.hero-content { max-width: 560px; }

/* testimonials: carousel */
/* 单条轮播 */
.testimonial-list { display: flex; overflow: hidden; }
.testimonial-list > * { flex: 0 0 100%; }

/* partners: grid-6 */
.partner-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: var(--space-gap); align-items: center; }

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

/* stats: inline */
/* 水平排列 */
.stats-grid { display: flex; justify-content: center; gap: 3rem; }

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

/* Page Layout: narrow-centered */
/* 窄版居中 */
.page-main { max-width: 860px; margin: 0 auto; }

/* 条件性装饰 */
.card:hover, [class*="card"]:hover {
    transform: translateY(-6px);
    box-shadow:
        0 2px 0 rgba(255,255,255,.78),
        0 28px 70px rgba(5,42,43,.16),
        0 10px 28px rgba(14,165,164,.16),
        0 0 0 1px rgba(5,42,43,.10) inset;
    border-color: rgba(5,42,43,.14);
    filter: saturate(1.03) contrast(1.02);
}

/* Strip backgrounds: horizontal-strips + alternating zones */
section:nth-of-type(odd), .section:nth-of-type(odd) {
    background:
        linear-gradient(180deg, rgba(255,255,255,.98) 0%, rgba(255,255,255,.78) 40%, rgba(255,241,204,.40) 100%),
        radial-gradient(900px 280px at 10% 0%, rgba(14,165,164,.10), rgba(14,165,164,0) 55%),
        radial-gradient(700px 260px at 90% 20%, rgba(249,115,22,.10), rgba(249,115,22,0) 55%);
    border-top: 1px solid rgba(5,42,43,.08);
    border-bottom: 1px solid rgba(5,42,43,.08);
}
section:nth-of-type(even), .section:nth-of-type(even) {
    background:
        linear-gradient(180deg, rgba(255,241,204,.92) 0%, rgba(255,231,178,.72) 40%, rgba(255,255,255,.65) 100%),
        radial-gradient(820px 340px at 15% 0%, rgba(249,115,22,.12), rgba(249,115,22,0) 56%),
        radial-gradient(820px 340px at 85% 25%, rgba(14,165,164,.12), rgba(14,165,164,0) 56%);
    border-top: 1px solid rgba(5,42,43,.08);
    border-bottom: 1px solid rgba(5,42,43,.08);
}
section:nth-of-type(3n), .section:nth-of-type(3n) {
    background:
        radial-gradient(1200px 420px at 15% 0%, rgba(14,165,164,.18), rgba(14,165,164,0) 55%),
        radial-gradient(1000px 380px at 90% 10%, rgba(249,115,22,.16), rgba(249,115,22,0) 56%),
        linear-gradient(180deg, rgba(7,27,34,1) 0%, rgba(11,42,51,.98) 50%, rgba(7,27,34,.92) 100%);
    color: rgba(255,255,255,.90);
    border-top: 1px solid rgba(255,255,255,.10);
    border-bottom: 1px solid rgba(255,255,255,.10);
}
section:nth-of-type(3n) a:not([class]) { color: rgba(126,239,206,.98); }
section:nth-of-type(3n) .card, section:nth-of-type(3n) [class*="card"] {
    background:
        radial-gradient(680px 240px at 12% 0%, rgba(14,165,164,.22), rgba(14,165,164,0) 56%),
        radial-gradient(540px 240px at 100% 20%, rgba(249,115,22,.20), rgba(249,115,22,0) 52%),
        linear-gradient(180deg, rgba(255,255,255,.10), rgba(255,255,255,.06));
    color: rgba(255,255,255,.92);
    border: 1px solid rgba(255,255,255,.12);
    box-shadow:
        0 1px 0 rgba(255,255,255,.10),
        0 18px 48px rgba(0,0,0,.38),
        0 10px 30px rgba(14,165,164,.18),
        0 0 0 1px rgba(255,255,255,.08) inset;
}
section:nth-of-type(3n) .btn,
section:nth-of-type(3n) button[class*="btn"],
section:nth-of-type(3n) a[class*="btn"] {
    background:
        linear-gradient(180deg, rgba(255,255,255,.14), rgba(255,255,255,.08));
    color: rgba(255,255,255,.92);
    border: 1px solid rgba(255,255,255,.14);
    box-shadow:
        0 1px 0 rgba(255,255,255,.12),
        0 16px 42px rgba(0,0,0,.35),
        0 0 0 2px rgba(14,165,164,.12) inset;
}
header, .header, .navbar {
    background: transparent;
    backdrop-filter: blur(6px) saturate(1.08);
    -webkit-backdrop-filter: blur(6px) saturate(1.08);
}

/* Accessible focus styling (decorative only) */
:focus-visible {
    outline: 2px solid rgba(14,165,164,.55);
    outline-offset: 3px;
    border-radius: var(--radius-sm);
}

/* 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: 3.5rem; --space-card: 1.1rem; --space-gap: 1rem; --transition: 220ms cubic-bezier(.2,.9,.2,1); }
    .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; }
}

/* keep inputs visually consistent with new palette */
input, textarea, select {
    caret-color: var(--color-accent);
    accent-color: var(--color-primary);
}