/* ============================================================
   base.css — 变量、重置、全局基础
   只放全局基础样式，不含布局与组件
   ============================================================ */

/* ---------- 01 设计变量 ---------- */
:root {
    --primary-color: #6E4B67;
    --secondary-color: #9E7D97;
    --accent-color: #C9A36A;
    --accent-light: #E6C896;
    --bg-dark: #1A1319;
    --bg-dark-light: #2B1F2A;
    --bg-light: #F9F8F9;
    --text-main: #2C2A2E;
    --text-light: #7A737D;
    --white: #FFFFFF;
    --transition: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
}

/* ---------- 02 重置与根元素 ---------- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-padding-top: 70px;
    scroll-behavior: smooth;
    background-color: var(--bg-dark);
}

body {
    font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
    color: var(--text-main);
    background-color: var(--bg-light);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

/* ---------- 03 基础元素 ---------- */
a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

img {
    display: block;
    max-width: 100%;
    height: auto;
    background-color: #FDFBFC;
}

a:focus-visible,
button:focus-visible {
    outline: 3px solid var(--accent-color);
    outline-offset: 3px;
}

/* ---------- 04 无障碍跳转链接 ---------- */
.skip-link {
    position: absolute;
    left: -9999px;
    top: 0;
    z-index: 3000;
    background: var(--accent-color);
    color: #1A1319;
    padding: 10px 16px;
    border-radius: 0 0 8px 0;
    font-weight: 700;
}

.skip-link:focus {
    left: 0;
}

/* ---------- 05 工具类 ---------- */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* 灯箱打开时锁定背景滚动 */
body.no-scroll {
    overflow: hidden;
}