/* ===== 基础排版 ===== */
body {
    min-width: 320px;
    overflow-x: hidden;
    background: var(--color-bg);
    color: var(--color-text);
    font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    font-size: 16px;
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
}
body.is-menu-open { overflow: hidden; }

.container { width: min(calc(100% - 48px), var(--container-width)); margin-inline: auto; }

/* ===== 区块 ===== */
.section { padding: 100px 0; position: relative; }
.section--muted { background: var(--gradient-section); }
.section--dark { background: var(--gradient-section-alt); color: var(--color-text); }
body { background: var(--color-bg); }

/* ===== 标题 ===== */
.section-heading { max-width: 760px; margin: 0 auto 56px; text-align: center; }
.section-heading h2, .consultation h2 {
    color: var(--color-heading);
    font-size: clamp(30px, 3.2vw, 46px);
    line-height: 1.22;
    letter-spacing: -.04em;
    font-weight: 800;
}
.section--dark .section-heading h2 { color: var(--color-heading); }
.section-heading > p:last-child { margin-top: 16px; color: var(--color-text-light); font-size: 17px; }
.section--dark .section-heading > p:last-child { color: var(--color-text-light); }

.eyebrow {
    display: inline-block;
    margin-bottom: 14px;
    padding: 8px 18px;
    border-radius: var(--radius-full);
    background: rgba(37, 56, 255, .1);
    color: var(--color-secondary);
    font-size: 12px;
    font-weight: 800;
    letter-spacing: .14em;
    border: 1px solid rgba(37, 56, 255, .18);
}
.section--dark .eyebrow {
    background: rgba(37, 56, 255, .1);
    color: var(--color-secondary);
    border-color: rgba(37, 56, 255, .18);
}

/* ===== 按钮 ===== */
.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 48px;
    padding: 0 26px;
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
    font-weight: 700;
    font-size: 15px;
    transition: transform var(--transition), background var(--transition), color var(--transition), border-color var(--transition), box-shadow var(--transition);
}
.button:hover { transform: translateY(-2px); }
.button--primary {
    background: var(--gradient-btn);
    color: #fff;
    box-shadow: 0 8px 24px rgba(143, 0, 255, .25);
}
.button--primary:hover {
    background: var(--gradient-btn-hover);
    box-shadow: 0 12px 32px rgba(143, 0, 255, .35);
}
.button--secondary {
    border-color: var(--color-border);
    background: #fff;
    color: var(--color-primary);
}
.button--secondary:hover {
    border-color: var(--color-secondary);
    background: var(--color-bg-light);
}
.button--ghost {
    border-color: var(--color-border);
    background: #fff;
    color: var(--color-heading);
}
.button--ghost:hover { border-color: var(--color-secondary); background: var(--color-bg-light); color: var(--color-secondary); }
.button--full { width: 100%; }

.text-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--color-secondary);
    font-weight: 700;
    font-size: 14px;
    transition: gap var(--transition);
}
.text-link::after { content: "→"; transition: transform var(--transition); }
.text-link:hover { gap: 10px; }

/* ===== 卡片网格 ===== */
.card-grid { display: grid; gap: 20px; }
.card-grid--four { grid-template-columns: repeat(4, 1fr); }
.card-grid--three { grid-template-columns: repeat(3, 1fr); }
.card-grid--two { grid-template-columns: repeat(2, 1fr); }

.info-card {
    min-height: 188px;
    padding: 30px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: #fff;
    transition: transform var(--transition-slow), box-shadow var(--transition-slow), border-color var(--transition);
    position: relative;
    overflow: hidden;
}
.info-card::before {
    content: "";
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: var(--gradient-accent);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-slow);
}
.info-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-card);
    border-color: transparent;
}
.info-card:hover::before { transform: scaleX(1); }
.info-card h3 {
    margin-bottom: 10px;
    color: var(--color-heading);
    font-size: 18px;
    line-height: 1.45;
    font-weight: 700;
}
.info-card p { color: var(--color-text-light); font-size: 14px; }

/* ===== 无障碍 ===== */
.skip-link { position: fixed; z-index: 1000; top: -50px; left: 16px; padding: 8px 12px; background: var(--color-primary); color: #fff; border-radius: var(--radius-xs); }
.skip-link:focus { top: 16px; }
.screen-reader-text { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; }
:focus-visible { outline: 3px solid rgba(59, 130, 246, .55); outline-offset: 3px; }

/* ===== 滚动动画 ===== */
[data-reveal] {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity .6s ease, transform .6s ease;
}
[data-reveal].is-visible {
    opacity: 1;
    transform: translateY(0);
}
[data-reveal-delay="1"] { transition-delay: .08s; }
[data-reveal-delay="2"] { transition-delay: .16s; }
[data-reveal-delay="3"] { transition-delay: .24s; }
[data-reveal-delay="4"] { transition-delay: .32s; }

/* ===== 数字高亮 ===== */
.metric-number {
    font-size: clamp(32px, 4vw, 52px);
    font-weight: 800;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1;
    letter-spacing: -.03em;
}

/* ===== 装饰线 ===== */
.divider-gradient {
    width: 60px;
    height: 4px;
    border-radius: var(--radius-full);
    background: var(--gradient-accent);
    margin: 16px auto 0;
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; }
    [data-reveal] { opacity: 1; transform: none; }
}