:root {
    --color-primary: #123a3a;
    --color-primary-dark: #071c1f;
    --color-accent: #2dd4bf;
    --color-surface: #f7f3e8;
    --color-text: #0b1b1e;

    --rgb-primary: 18,58,58;
    --rgb-accent: 45,212,191;

    --radius-sm: 16px;
    --radius-md: 20px;
    --radius-lg: 24px;
    --radius-xl: 28px;

    --shadow-sm: 0 1px 0 rgba(10, 22, 40, .06), 0 10px 24px rgba(18, 58, 58, .10);
    --shadow-md: 0 2px 0 rgba(10, 22, 40, .05), 0 14px 36px rgba(18, 58, 58, .12), 0 0 0 1px rgba(18, 58, 58, .10) inset;
    --shadow-lg: 0 4px 0 rgba(10, 22, 40, .04), 0 24px 60px rgba(18, 58, 58, .18), 0 0 0 1px rgba(45, 212, 191, .20) inset;

    --space-section: 4rem;
    --space-card: 1.5rem;
    --space-gap: 1.25rem;

    --transition: 320ms cubic-bezier(.2, .85, .2, 1);
    --heading-weight: 800;
    --body-line-height: 1.65;

    --strip-white: #ffffff;
    --strip-cream: #fff7e6;
    --strip-dark: #071c1f;
}

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

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);
    box-shadow:
        0 1px 0 rgba(255,255,255,.65),
        0 12px 28px rgba(7, 28, 31, .10),
        0 0 0 1px rgba(18, 58, 58, .10) inset,
        0 10px 60px rgba(45, 212, 191, .06);
    padding: var(--space-card);
    transition:
        transform var(--transition),
        box-shadow var(--transition),
        border-color var(--transition),
        background var(--transition),
        color var(--transition);
    background:
        radial-gradient(120% 90% at 10% 0%, rgba(45, 212, 191, .10) 0%, rgba(45, 212, 191, 0) 60%),
        linear-gradient(180deg, rgba(255,255,255,.78) 0%, rgba(255,255,255,.58) 100%);
    backdrop-filter: blur(8px);
}

.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition:
        transform var(--transition),
        box-shadow var(--transition),
        background var(--transition),
        border-color var(--transition),
        color var(--transition);
}

a:not([class]) {
    color: var(--color-primary);
    transition: var(--transition);
    text-decoration-thickness: 1px;
    text-underline-offset: 3px;
}

a:not([class]):focus, button[class*="btn"]:focus, .btn:focus {
    outline: 2px solid rgba(var(--rgb-accent), .35);
    outline-offset: 3px;
}

@supports not (backdrop-filter: blur(8px)) {
    .card, [class*="card"] { background: linear-gradient(180deg, rgba(247, 243, 232, .92) 0%, rgba(255,255,255,.72) 100%); }
}

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

/* news: list-view */
/* 列表模式 (图左文右) */
                .news-grid { display: flex; flex-direction: column; gap: var(--space-gap); }
                .news-grid .card {
                    display: grid;
                    grid-template-columns: 280px 1fr;
                    border-radius: var(--radius-xl);
                    box-shadow:
                        0 1px 0 rgba(255,255,255,.70),
                        0 16px 46px rgba(7, 28, 31, .12),
                        0 0 0 1px rgba(18, 58, 58, .11) inset,
                        0 0 0 6px rgba(45, 212, 191, .04);
                    background:
                        radial-gradient(95% 70% at 0% 0%, rgba(45, 212, 191, .14) 0%, rgba(45, 212, 191, 0) 55%),
                        linear-gradient(180deg, rgba(255,255,255,.86) 0%, rgba(255,255,255,.64) 100%);
                }

/* features: grid-4 */
.feature-list { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-gap); }

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

/* testimonials: stacked */
/* 垂直堆叠 */
                .testimonial-list { display: flex; flex-direction: column; gap: var(--space-gap); max-width: 720px; margin: 0 auto; }

/* partners: scroll */
/* 自动滚动 */
                .partner-grid { display: flex; gap: 2rem; overflow: hidden; animation: partnerScroll 20s linear infinite; }
                @keyframes partnerScroll { 0% { transform: translateX(0); } 100% { transform: translateX(-50%); } }

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

/* stats: grid-3 */
.stats-grid { display: grid; grid-template-columns: repeat(3, 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 */
.card:hover, [class*="card"]:hover {
    transform: translateY(-6px);
    box-shadow:
        0 1px 0 rgba(255,255,255,.72),
        0 26px 80px rgba(7, 28, 31, .22),
        0 0 0 1px rgba(45, 212, 191, .28) inset,
        0 0 0 10px rgba(45, 212, 191, .06);
    background:
        radial-gradient(90% 80% at 10% 0%, rgba(45, 212, 191, .18) 0%, rgba(45, 212, 191, 0) 62%),
        linear-gradient(180deg, rgba(255,255,255,.90) 0%, rgba(247, 243, 232, .72) 100%);
}

a:not([class]):hover {
    color: var(--color-accent);
    text-shadow: 0 0 0 rgba(0,0,0,0), 0 10px 30px rgba(45, 212, 191, .22);
}

.card { border: 1px solid rgba(var(--rgb-primary), .10); }

/* Horizontal-strips: decorative background identity without structural changes */
section:nth-of-type(odd),
.section:nth-of-type(odd) {
    background: linear-gradient(180deg, var(--strip-white) 0%, rgba(255,255,255,.98) 100%);
}
section:nth-of-type(even),
.section:nth-of-type(even) {
    background:
        radial-gradient(110% 80% at 0% 0%, rgba(45, 212, 191, .10) 0%, rgba(45, 212, 191, 0) 55%),
        linear-gradient(180deg, var(--strip-cream) 0%, rgba(255, 247, 230, .92) 100%);
}
section:nth-of-type(4n),
.section:nth-of-type(4n) {
    background:
        radial-gradient(130% 90% at 10% 0%, rgba(45, 212, 191, .18) 0%, rgba(45, 212, 191, 0) 58%),
        linear-gradient(180deg, rgba(7, 28, 31, .96) 0%, rgba(18, 58, 58, .92) 100%);
    color: rgba(255,255,255,.92);
}
section:nth-of-type(4n) a:not([class]) { color: rgba(255,255,255,.86); }
section:nth-of-type(4n) a:not([class]):hover { color: var(--color-accent); }
section:nth-of-type(4n) .card, section:nth-of-type(4n) [class*="card"] {
    background:
        radial-gradient(95% 70% at 0% 0%, rgba(45, 212, 191, .20) 0%, rgba(45, 212, 191, 0) 55%),
        linear-gradient(180deg, rgba(255,255,255,.10) 0%, rgba(255,255,255,.06) 100%);
    box-shadow:
        0 1px 0 rgba(255,255,255,.10),
        0 18px 50px rgba(0,0,0,.28),
        0 0 0 1px rgba(45, 212, 191, .20) inset,
        0 0 0 8px rgba(45, 212, 191, .06);
}

section:nth-of-type(4n) .card:hover, section:nth-of-type(4n) [class*="card"]:hover {
    box-shadow:
        0 1px 0 rgba(255,255,255,.10),
        0 28px 90px rgba(0,0,0,.38),
        0 0 0 1px rgba(45, 212, 191, .35) inset,
        0 0 0 12px rgba(45, 212, 191, .08);
}

@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; }

    .card, [class*="card"] { border-radius: 22px; }
}