@charset "utf-8";
/* =====================================================================
   无极软件 - 全站全新响应式样式
   适用：PC(>1200) / 平板(768-1199) / 手机(<=767) 三端自适配
   设计语言：科技蓝 + 渐变 + 圆角卡片
   ===================================================================== */

/* ---------- 0. 变量与基础 ---------- */
:root {
    --primary: #1b5fd9;
    --primary-deep: #0e2a5c;
    --primary-dark: #0a1f45;
    --primary-light: #4d8df0;
    --accent: #ff5842;
    --accent-light: #ff7a5c;
    --grad: linear-gradient(135deg, #0e2a5c 0%, #1b5fd9 60%, #2f7cf0 100%);
    --grad-accent: linear-gradient(135deg, #ff5842 0%, #ff8a5c 100%);
    --bg: #f5f8fd;
    --card: #ffffff;
    --text: #333e4f;
    --text-light: #7b8798;
    --border: #e6edf7;
    --shadow: 0 6px 24px rgba(14, 42, 92, .08);
    --shadow-lg: 0 14px 40px rgba(14, 42, 92, .16);
    --radius: 14px;
    --radius-sm: 8px;
    --header-h: 70px;
    --font: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
body {
    font-family: var(--font);
    color: var(--text);
    background: var(--bg);
    font-size: 15px;
    line-height: 1.7;
    overflow-x: hidden;
}
img { max-width: 100%; border: 0; display: block; }
a { color: var(--primary); text-decoration: none; transition: all .25s ease; }
a:hover { color: var(--accent); }
ul, ol { list-style: none; }
input, select, textarea, button { font-family: inherit; font-size: inherit; }
button { cursor: pointer; border: 0; background: none; }
.wj-container { width: 1200px; max-width: 100%; margin: 0 auto; padding: 0 20px; }
.wj-section { padding: 70px 0; }
.clearfix::after { content: ""; display: block; clear: both; }
.hidden { display: none !important; }

/* ---------- 1. 顶部导航 ---------- */
.wj-header {
    position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
    height: var(--header-h);
    background: rgba(10, 31, 69, .82);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, .08);
    transition: all .3s ease;
}
.wj-header.scrolled {
    background: rgba(10, 31, 69, .97);
    box-shadow: 0 4px 20px rgba(0, 0, 0, .25);
}
.wj-header-inner { display: flex; align-items: center; height: 100%; position: relative; }
.wj-logo { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.wj-logo img { height: 38px; width: auto; }
.wj-logo .wj-logo-txt { font-size: 22px; font-weight: 700; color: #fff; letter-spacing: 2px; }
.wj-logo .wj-logo-txt span { color: var(--accent); }
.wj-nav { margin-left: 48px; flex: 1; }
.wj-nav > ul { display: flex; }
.wj-nav > ul > li { position: relative; }
.wj-nav > ul > li > a {
    display: block; color: rgba(255, 255, 255, .88);
    font-size: 15px; line-height: var(--header-h); padding: 0 16px;
}
.wj-nav > ul > li > a:hover,
.wj-nav > ul > li > a.active { color: #fff; }
.wj-nav > ul > li > a.active::after {
    content: ""; position: absolute; left: 16px; right: 16px; bottom: 12px;
    height: 3px; border-radius: 2px; background: var(--grad-accent);
}
.wj-header-actions { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.wj-btn {
    display: inline-block; padding: 9px 22px; border-radius: 30px;
    font-size: 14px; line-height: 1.4; text-align: center;
}
.wj-btn-buy { background: var(--grad-accent); color: #fff; font-weight: 600; box-shadow: 0 4px 14px rgba(255, 88, 66, .4); }
.wj-btn-buy:hover { color: #fff; transform: translateY(-2px); box-shadow: 0 6px 18px rgba(255, 88, 66, .5); }
.wj-btn-line { border: 1px solid rgba(255, 255, 255, .55); color: #fff; }
.wj-btn-line:hover { background: rgba(255, 255, 255, .12); color: #fff; }
.wj-menu-btn {
    display: none; width: 40px; height: 40px; position: absolute; right: 0; top: 50%;
    transform: translateY(-50%); flex-direction: column; justify-content: center; gap: 5px;
    padding: 0 6px; z-index: 1200;
}
.wj-menu-btn span { display: block; height: 3px; border-radius: 2px; background: #fff; transition: all .3s; }
.wj-menu-btn.open span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.wj-menu-btn.open span:nth-child(2) { opacity: 0; }
.wj-menu-btn.open span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

/* ---------- 2. 首屏 Hero ---------- */
.wj-hero {
    position: relative; min-height: 520px; padding: calc(var(--header-h) + 60px) 0 150px;
    background: var(--grad);
    overflow: hidden;
    display: flex; align-items: center;
}
.wj-hero::before {
    content: ""; position: absolute; right: -10%; top: -20%;
    width: 640px; height: 640px; border-radius: 50%;
    background: radial-gradient(circle, rgba(77, 141, 240, .45), transparent 65%);
}
.wj-hero::after {
    content: ""; position: absolute; left: -8%; bottom: -30%;
    width: 480px; height: 480px; border-radius: 50%;
    background: radial-gradient(circle, rgba(255, 88, 66, .25), transparent 60%);
}
.wj-hero-inner { position: relative; z-index: 2; display: flex; align-items: center; gap: 60px; }
.wj-hero-txt { flex: 1.1; }
.wj-hero-txt .wj-hero-tag {
    display: inline-block; padding: 5px 16px; border-radius: 30px;
    background: rgba(255, 255, 255, .14); color: #cfe0ff;
    font-size: 13px; letter-spacing: 1px; margin-bottom: 18px;
    border: 1px solid rgba(255, 255, 255, .2);
}
.wj-hero-txt h1 {
    color: #fff; font-size: 44px; line-height: 1.3; font-weight: 800;
    margin-bottom: 16px; letter-spacing: 1px;
}
.wj-hero-txt h1 em { font-style: normal; color: #ff9a7a; }
.wj-hero-txt p { color: rgba(255, 255, 255, .82); font-size: 16px; margin-bottom: 30px; max-width: 520px; }
.wj-hero-cta { display: flex; gap: 16px; flex-wrap: wrap; }
.wj-hero-img { flex: 0.9; text-align: center; }
.wj-hero-img img { border-radius: 18px; box-shadow: var(--shadow-lg); max-width: 100%; }
.wj-hero-info {
    position: absolute; left: 0; right: 0; bottom: -36px; z-index: 3;
}
.wj-hero-cards {
    display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px;
    background: #fff; border-radius: var(--radius);
    box-shadow: var(--shadow-lg); padding: 26px 30px;
}
.wj-hero-card { text-align: center; }
.wj-hero-card b { display: block; font-size: 30px; color: var(--primary); font-weight: 800; }
.wj-hero-card b i { font-style: normal; font-size: 16px; margin-left: 2px; }
.wj-hero-card span { color: var(--text-light); font-size: 13px; }

/* ---------- 3. 通用区块标题 ---------- */
.wj-sec-head { text-align: center; margin-bottom: 46px; }
.wj-sec-head .wj-sec-tag {
    display: inline-block; padding: 4px 14px; border-radius: 20px;
    background: rgba(27, 95, 217, .1); color: var(--primary);
    font-size: 13px; letter-spacing: 2px; margin-bottom: 12px;
}
.wj-sec-head h2 { font-size: 32px; font-weight: 800; color: var(--primary-deep); letter-spacing: 1px; }
.wj-sec-head h2 em { font-style: normal; color: var(--primary); }
.wj-sec-head p { color: var(--text-light); margin-top: 10px; font-size: 15px; }

/* ---------- 4. 产品卡片 ---------- */
.wj-prod-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 26px; }
.wj-prod-card {
    background: #fff; border-radius: var(--radius); overflow: hidden;
    box-shadow: var(--shadow); border: 1px solid var(--border);
    display: flex; transition: all .3s ease;
}
.wj-prod-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.wj-prod-body { flex: 1.25; padding: 34px 30px 30px; display: flex; flex-direction: column; }
.wj-prod-ic { width: 56px; height: 56px; border-radius: 14px; margin-bottom: 16px; display: flex; align-items: center; justify-content: center; }
.wj-prod-ic img { width: 56px; height: 56px; }
.wj-prod-body h3 { font-size: 22px; color: var(--primary-deep); margin-bottom: 8px; }
.wj-prod-body > p { color: var(--text-light); font-size: 14px; margin-bottom: 16px; }
.wj-prod-feats { margin-bottom: 20px; }
.wj-prod-feats li {
    position: relative; padding: 5px 0 5px 24px; color: var(--text); font-size: 14px;
}
.wj-prod-feats li::before {
    content: ""; position: absolute; left: 0; top: 12px;
    width: 8px; height: 8px; border-radius: 50%;
    background: var(--grad-accent);
}
.wj-prod-more { margin-top: auto; }
.wj-prod-more a {
    display: inline-block; padding: 9px 24px; border-radius: 30px;
    background: rgba(27, 95, 217, .08); color: var(--primary); font-size: 14px; font-weight: 600;
}
.wj-prod-more a:hover { background: var(--grad); color: #fff; }
.wj-prod-pic { flex: 1; display: flex; align-items: center; justify-content: center; padding: 20px; background: linear-gradient(160deg, #eef4ff, #f7fbff); }
.wj-prod-pic img { max-height: 220px; border-radius: 10px; }

/* ---------- 5. 特性网格（3/4 列） ---------- */
.wj-feat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.wj-feat {
    background: #fff; border-radius: var(--radius); padding: 30px 24px;
    border: 1px solid var(--border); box-shadow: var(--shadow); transition: all .3s ease;
}
.wj-feat:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); }
.wj-feat .wj-feat-ic { width: 52px; height: 52px; border-radius: 12px; margin-bottom: 16px; display: flex; align-items: center; justify-content: center; }
.wj-feat .wj-feat-ic img { width: 52px; height: 52px; }
.wj-feat h4 { font-size: 17px; color: var(--primary-deep); margin-bottom: 8px; }
.wj-feat p { font-size: 13.5px; color: var(--text-light); }

/* ---------- 6. 图文交替区块 ---------- */
.wj-split { display: flex; align-items: center; gap: 60px; }
.wj-split.rev { flex-direction: row-reverse; }
.wj-split-img { flex: 1; text-align: center; }
.wj-split-img img { border-radius: 16px; box-shadow: var(--shadow-lg); }
.wj-split-txt { flex: 1; }
.wj-split-txt h3 { font-size: 28px; color: var(--primary-deep); margin-bottom: 14px; font-weight: 800; }
.wj-split-txt h3 em { font-style: normal; color: var(--primary); }
.wj-split-txt p { color: var(--text-light); margin-bottom: 18px; font-size: 15px; }
.wj-split-txt ul li {
    position: relative; padding: 7px 0 7px 26px; font-size: 15px; color: var(--text);
}
.wj-split-txt ul li::before {
    content: "✓"; position: absolute; left: 0; top: 7px;
    width: 18px; height: 18px; border-radius: 50%;
    background: rgba(27, 95, 217, .1); color: var(--primary);
    font-size: 11px; line-height: 18px; text-align: center;
}

/* ---------- 7. 深色 CTA 区块 ---------- */
.wj-cta {
    background: var(--grad); border-radius: 22px;
    padding: 54px 60px; display: flex; align-items: center; justify-content: space-between;
    gap: 30px; flex-wrap: wrap; position: relative; overflow: hidden;
}
.wj-cta::before {
    content: ""; position: absolute; right: -6%; top: -80%;
    width: 380px; height: 380px; border-radius: 50%;
    background: radial-gradient(circle, rgba(255, 255, 255, .14), transparent 60%);
}
.wj-cta h3 { color: #fff; font-size: 26px; font-weight: 800; margin-bottom: 6px; position: relative; z-index: 1; }
.wj-cta p { color: rgba(255, 255, 255, .8); font-size: 15px; position: relative; z-index: 1; }
.wj-cta .wj-btn { position: relative; z-index: 1; }

/* ---------- 8. 价格/套餐 ---------- */
.wj-price-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.wj-price-card {
    background: #fff; border-radius: var(--radius); padding: 34px 30px; text-align: center;
    border: 1px solid var(--border); box-shadow: var(--shadow); transition: all .3s ease; position: relative;
}
.wj-price-card.hot { border: 2px solid var(--primary); transform: translateY(-8px); box-shadow: var(--shadow-lg); }
.wj-price-card .wj-price-tag {
    position: absolute; top: -14px; left: 50%; transform: translateX(-50%);
    background: var(--grad-accent); color: #fff; font-size: 12px; padding: 4px 16px; border-radius: 20px; letter-spacing: 1px;
}
.wj-price-card h4 { font-size: 18px; color: var(--primary-deep); margin-bottom: 16px; }
.wj-price { font-size: 14px; color: var(--text-light); margin-bottom: 20px; }
.wj-price b { font-size: 40px; color: var(--accent); font-weight: 800; }
.wj-price b i { font-style: normal; font-size: 16px; }
.wj-price-card ul { text-align: left; margin-bottom: 26px; }
.wj-price-card ul li {
    position: relative; padding: 6px 0 6px 24px; font-size: 14px; color: var(--text);
    border-bottom: 1px dashed var(--border);
}
.wj-price-card ul li::before {
    content: "✓"; color: var(--primary); font-weight: 700; position: absolute; left: 0; top: 6px;
}

/* ---------- 9. 教程（视频/图文） ---------- */
.wj-video-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.wj-video-card {
    background: #fff; border-radius: var(--radius); overflow: hidden; border: 1px solid var(--border);
    box-shadow: var(--shadow); transition: all .3s ease; display: block;
}
.wj-video-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.wj-video-thumb { position: relative; aspect-ratio: 16 / 10; overflow: hidden; background: #eaf1fb; }
.wj-video-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s ease; }
.wj-video-card:hover .wj-video-thumb img { transform: scale(1.06); }
.wj-video-thumb .wj-play {
    position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%);
    width: 54px; height: 54px; border-radius: 50%;
    background: rgba(14, 42, 92, .55); backdrop-filter: blur(4px);
    display: flex; align-items: center; justify-content: center; transition: all .3s;
}
.wj-video-thumb .wj-play::after {
    content: ""; border-left: 16px solid #fff; border-top: 10px solid transparent; border-bottom: 10px solid transparent;
    margin-left: 4px;
}
.wj-video-card:hover .wj-play { background: var(--grad-accent); transform: translate(-50%, -50%) scale(1.1); }
.wj-video-body { padding: 20px 22px 22px; }
.wj-video-body h4 { font-size: 17px; color: var(--primary-deep); margin-bottom: 6px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.wj-video-body p { font-size: 13.5px; color: var(--text-light); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }

/* 图文教程 */
.wj-article-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.wj-article-card {
    background: #fff; border-radius: var(--radius); overflow: hidden; border: 1px solid var(--border);
    box-shadow: var(--shadow); transition: all .3s ease; display: flex; flex-direction: column;
}
.wj-article-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.wj-article-card img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; }
.wj-article-body { padding: 20px 22px 22px; display: flex; flex-direction: column; flex: 1; }
.wj-article-body h4 { font-size: 17px; color: var(--primary-deep); margin-bottom: 8px; }
.wj-article-body p { font-size: 13.5px; color: var(--text-light); flex: 1; }
.wj-article-body .wj-article-more { margin-top: 14px; font-size: 13px; color: var(--primary); font-weight: 600; }

/* ---------- 10. 下载页 ---------- */
.wj-dl-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.wj-dl-card {
    background: #fff; border-radius: var(--radius); padding: 34px 22px; text-align: center;
    border: 1px solid var(--border); box-shadow: var(--shadow); transition: all .3s ease;
}
.wj-dl-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.wj-dl-card img { width: 76px; height: 76px; margin: 0 auto 16px; }
.wj-dl-card h4 { font-size: 17px; color: var(--primary-deep); margin-bottom: 6px; }
.wj-dl-card p { font-size: 13px; color: var(--text-light); margin-bottom: 18px; }
.wj-dl-card .wj-btn { padding: 8px 26px; }

/* ---------- 11. 关于我们 ---------- */
.wj-about-hero {
    background: var(--grad); color: #fff; padding: calc(var(--header-h) + 56px) 0 80px;
    text-align: center; position: relative; overflow: hidden;
}
.wj-about-hero::after {
    content: ""; position: absolute; right: -10%; top: -40%;
    width: 460px; height: 460px; border-radius: 50%;
    background: radial-gradient(circle, rgba(255, 255, 255, .12), transparent 60%);
}
.wj-about-hero h1 { font-size: 38px; font-weight: 800; letter-spacing: 2px; position: relative; z-index: 1; }
.wj-about-hero p { margin-top: 12px; color: rgba(255, 255, 255, .82); font-size: 16px; position: relative; z-index: 1; }
.wj-about-box {
    background: #fff; border-radius: var(--radius); padding: 44px 48px;
    border: 1px solid var(--border); box-shadow: var(--shadow); margin-bottom: 30px;
}
.wj-about-box h3 {
    font-size: 22px; color: var(--primary-deep); margin-bottom: 18px; padding-left: 16px;
    border-left: 4px solid var(--primary); line-height: 1.4;
}
.wj-about-box p { color: var(--text); margin-bottom: 14px; font-size: 15px; text-indent: 0; }
.wj-contact-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.wj-contact-card {
    display: flex; align-items: center; gap: 18px; background: #fff;
    border-radius: var(--radius); padding: 26px 28px; border: 1px solid var(--border); box-shadow: var(--shadow);
}
.wj-contact-card .wj-contact-ic {
    width: 54px; height: 54px; border-radius: 14px; background: rgba(27, 95, 217, .1);
    display: flex; align-items: center; justify-content: center; font-size: 24px; color: var(--primary); flex-shrink: 0;
}
.wj-contact-card h4 { font-size: 16px; color: var(--primary-deep); }
.wj-contact-card p { font-size: 14px; color: var(--text-light); word-break: break-all; }

/* ---------- 11.5 图文教程列表 + 侧栏 ---------- */
.wj-tut-layout { display: grid; grid-template-columns: 1fr 300px; gap: 30px; align-items: start; }
.wj-tut-main { display: flex; flex-direction: column; gap: 20px; }
.wj-tut-item {
    display: flex; background: #fff; border-radius: var(--radius); overflow: hidden;
    border: 1px solid var(--border); box-shadow: var(--shadow); transition: all .3s ease;
}
.wj-tut-item:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.wj-tut-item img { width: 250px; flex-shrink: 0; aspect-ratio: 16 / 10; object-fit: cover; }
.wj-tut-item-body { padding: 22px 26px; display: flex; flex-direction: column; }
.wj-tut-item-body h4 { font-size: 18px; color: var(--primary-deep); margin-bottom: 8px; }
.wj-tut-item-body p { font-size: 14px; color: var(--text-light); flex: 1; margin-bottom: 10px; }
.wj-tut-item-body .wj-article-more { font-size: 13px; color: var(--primary); font-weight: 600; }
.wj-tut-side { position: sticky; top: calc(var(--header-h) + 20px); }
.wj-side-card {
    background: #fff; border-radius: var(--radius); padding: 26px 24px;
    border: 1px solid var(--border); box-shadow: var(--shadow); margin-bottom: 20px;
}
.wj-side-card h4 {
    font-size: 17px; color: var(--primary-deep); margin-bottom: 16px;
    padding-bottom: 10px; border-bottom: 2px solid var(--border); position: relative;
}
.wj-side-card h4::after {
    content: ""; position: absolute; left: 0; bottom: -2px; width: 44px; height: 2px; background: var(--grad-accent);
}
.wj-side-card ul li { padding: 9px 0; border-bottom: 1px dashed var(--border); }
.wj-side-card ul li:last-child { border-bottom: 0; }
.wj-side-card ul li a { color: var(--text); font-size: 14px; display: block; }
.wj-side-card ul li a:hover { color: var(--accent); padding-left: 6px; }
.wj-side-card ul li a.active { color: var(--primary); font-weight: 700; }

/* ---------- 12. 页面内页头 ---------- */
.wj-page-head {
    background: var(--grad); color: #fff; padding: calc(var(--header-h) + 46px) 0 56px;
    text-align: center; position: relative; overflow: hidden;
}
.wj-page-head::after {
    content: ""; position: absolute; right: -8%; top: -60%;
    width: 420px; height: 420px; border-radius: 50%;
    background: radial-gradient(circle, rgba(255, 255, 255, .13), transparent 60%);
}
.wj-page-head h1 { font-size: 34px; font-weight: 800; letter-spacing: 2px; position: relative; z-index: 1; }
.wj-page-head p { margin-top: 10px; color: rgba(255, 255, 255, .8); font-size: 15px; position: relative; z-index: 1; }
.wj-crumb { position: relative; z-index: 1; margin-top: 14px; font-size: 13px; color: rgba(255, 255, 255, .7); }
.wj-crumb a { color: rgba(255, 255, 255, .9); }
.wj-crumb a:hover { color: #fff; }

/* ---------- 13. 步骤条 ---------- */
.wj-steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; counter-reset: step; }
.wj-step { background: #fff; border-radius: var(--radius); padding: 30px 26px; border: 1px solid var(--border); box-shadow: var(--shadow); position: relative; }
.wj-step::before {
    counter-increment: step; content: counter(step, decimal-leading-zero);
    font-size: 44px; font-weight: 800; color: rgba(27, 95, 217, .14);
    position: absolute; right: 20px; top: 10px; line-height: 1;
}
.wj-step h4 { font-size: 17px; color: var(--primary-deep); margin-bottom: 8px; position: relative; z-index: 1; }
.wj-step p { font-size: 14px; color: var(--text-light); position: relative; z-index: 1; }

/* ---------- 14. 底部 ---------- */
.wj-footer { background: var(--primary-dark); color: rgba(255, 255, 255, .68); margin-top: 0; }
.wj-footer-main { padding: 60px 0 36px; display: grid; grid-template-columns: 1.2fr 1fr 1fr 1.2fr; gap: 40px; }
.wj-footer h4 {
    color: #fff; font-size: 16px; font-weight: 700; margin-bottom: 20px;
    letter-spacing: 1px; position: relative; padding-bottom: 10px;
}
.wj-footer h4::after { content: ""; position: absolute; left: 0; bottom: 0; width: 30px; height: 2px; background: var(--grad-accent); }
.wj-footer .wj-f-logo { display: flex; align-items: center; gap: 10px; margin-bottom: 16px; }
.wj-footer .wj-f-logo img { height: 34px; }
.wj-footer .wj-f-logo b { color: #fff; font-size: 20px; letter-spacing: 2px; }
.wj-footer .wj-f-about { font-size: 13.5px; line-height: 2; }
.wj-footer ul li { padding: 5px 0; }
.wj-footer ul li a { color: rgba(255, 255, 255, .68); font-size: 14px; }
.wj-footer ul li a:hover { color: var(--accent-light); padding-left: 4px; }
.wj-footer .wj-f-contact li { font-size: 13.5px; padding: 6px 0; }
.wj-footer .wj-f-contact li b { color: #fff; font-weight: 600; }
.wj-footer .wj-f-qr { display: flex; align-items: flex-start; gap: 20px; }
.wj-footer .wj-f-qr img { width: 108px; height: 108px; border-radius: 10px; background: #fff; padding: 4px; }
.wj-footer .wj-f-qr p { font-size: 12.5px; line-height: 1.8; margin-top: 4px; }
.wj-footer .wj-f-bottom {
    border-top: 1px solid rgba(255, 255, 255, .08); padding: 18px 0;
    display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap;
    font-size: 13px;
}
.wj-footer .wj-f-bottom a { color: rgba(255, 255, 255, .68); }
.wj-footer .wj-f-bottom a:hover { color: #fff; }

/* ---------- 15. 悬浮客服 ---------- */
.wj-float { position: fixed; right: 18px; bottom: 90px; z-index: 999; display: flex; flex-direction: column; gap: 12px; }
.wj-float a {
    width: 52px; height: 52px; border-radius: 50%; background: var(--grad);
    color: #fff; display: flex; align-items: center; justify-content: center;
    box-shadow: 0 6px 16px rgba(14, 42, 92, .3); position: relative; transition: all .3s;
}
.wj-float a:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.wj-float a img { width: 26px; height: 26px; }
.wj-float a .wj-float-tip {
    position: absolute; right: 60px; top: 50%; transform: translateY(-50%);
    background: var(--primary-dark); color: #fff; font-size: 12px; white-space: nowrap;
    padding: 6px 12px; border-radius: 6px; opacity: 0; pointer-events: none; transition: all .25s;
}
.wj-float a:hover .wj-float-tip { opacity: 1; right: 66px; }
.wj-float .wj-float-qr-box { width: 52px; height: 52px; border-radius: 50%; overflow: hidden; background: #fff; box-shadow: 0 6px 16px rgba(14, 42, 92, .25); cursor: pointer; position: relative; }
.wj-float .wj-float-qr-box img { width: 100%; height: 100%; object-fit: cover; }
.wj-float .wj-float-qr-box .wj-float-tip {
    position: absolute; right: 60px; top: 50%; transform: translateY(-50%);
    background: var(--primary-dark); color: #fff; font-size: 12px; white-space: nowrap;
    padding: 6px 12px; border-radius: 6px; opacity: 0; pointer-events: none; transition: all .25s;
}
.wj-float .wj-float-qr-box:hover .wj-float-tip { opacity: 1; right: 66px; }

/* ---------- 16. 回到顶部 ---------- */
.wj-gotop {
    position: fixed; right: 18px; bottom: 26px; z-index: 999;
    width: 46px; height: 46px; border-radius: 12px; background: rgba(14, 42, 92, .85);
    color: #fff; font-size: 20px; display: none; align-items: center; justify-content: center;
    box-shadow: 0 6px 16px rgba(0, 0, 0, .2); transition: all .3s;
}
.wj-gotop.show { display: flex; }
.wj-gotop:hover { background: var(--primary); }

/* ---------- 17. 浅色分区交替 ---------- */
.wj-bg-white { background: #fff; }
.wj-bg-gray { background: var(--bg); }
.wj-bg-grad { background: var(--grad); }

/* =====================================================================
   响应式：平板（992-1199）
   ===================================================================== */
@media screen and (max-width: 1199px) {
    .wj-container { padding: 0 24px; }
    .wj-feat-grid { grid-template-columns: repeat(2, 1fr); }
    .wj-video-list, .wj-article-list { grid-template-columns: repeat(2, 1fr); }
    .wj-dl-grid { grid-template-columns: repeat(2, 1fr); }
    .wj-prod-grid { grid-template-columns: repeat(2, 1fr); }
    .wj-hero-txt h1 { font-size: 36px; }
}

/* =====================================================================
   响应式：手机（<=991）
   ===================================================================== */
@media screen and (max-width: 991px) {
    :root { --header-h: 60px; }
    body { font-size: 14px; }
    .wj-section { padding: 48px 0; }

    /* 导航 → 汉堡 */
    .wj-menu-btn { display: flex; }
    .wj-nav {
        position: fixed; top: var(--header-h); left: 0; right: 0;
        background: var(--primary-dark); max-height: 0; overflow: hidden;
        transition: max-height .35s ease; box-shadow: 0 12px 24px rgba(0, 0, 0, .25);
        margin: 0;
    }
    .wj-nav.open { max-height: 460px; overflow-y: auto; }
    .wj-nav > ul { flex-direction: column; padding: 6px 0 14px; }
    .wj-nav > ul > li { border-bottom: 1px solid rgba(255, 255, 255, .06); }
    .wj-nav > ul > li > a { line-height: 46px; padding: 0 24px; }
    .wj-nav > ul > li > a.active::after { display: none; }
    .wj-nav > ul > li > a.active { color: var(--accent-light); background: rgba(255, 255, 255, .04); }
    .wj-header-actions { margin-right: 52px; }
    .wj-header-actions .wj-btn-line { display: none; }

    /* Hero */
    .wj-hero { padding: calc(var(--header-h) + 40px) 0 60px; }
    .wj-hero-info { position: static; margin-top: 24px; }
    .wj-hero-inner { flex-direction: column; gap: 36px; text-align: center; }
    .wj-hero-txt p { margin: 0 auto 28px; }
    .wj-hero-cta { justify-content: center; }
    .wj-hero-txt h1 { font-size: 30px; }
    .wj-hero-cards { grid-template-columns: repeat(2, 1fr); gap: 18px; padding: 22px; }
    .wj-hero-card b { font-size: 24px; }

    /* 产品卡片单列 */
    .wj-prod-grid { grid-template-columns: 1fr; }
    .wj-prod-card { flex-direction: column; }
    .wj-prod-pic { order: -1; }

    /* 图文交替 */
    .wj-split { flex-direction: column; gap: 30px; }
    .wj-split.rev { flex-direction: column; }
    .wj-split-txt h3 { font-size: 24px; }

    /* 价格 */
    .wj-price-grid { grid-template-columns: 1fr; }
    .wj-price-card.hot { transform: none; }

    /* 步骤 */
    .wj-steps { grid-template-columns: 1fr; }

    /* CTA */
    .wj-cta { padding: 40px 28px; text-align: center; justify-content: center; }

    /* 关于 */
    .wj-about-box { padding: 30px 24px; }
    .wj-contact-grid { grid-template-columns: 1fr; }
    .wj-about-hero h1 { font-size: 30px; }

    /* 页头 */
    .wj-page-head h1 { font-size: 28px; }

    /* 图文教程 */
    .wj-tut-layout { grid-template-columns: 1fr; }
    .wj-tut-side { position: static; display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
    .wj-tut-item img { width: 180px; }

    /* 页脚 */
    .wj-footer-main { grid-template-columns: 1fr 1fr; gap: 32px; }
    .wj-footer .wj-f-qr img { width: 96px; height: 96px; }
}

/* =====================================================================
   响应式：小屏手机（<=767）
   ===================================================================== */
@media screen and (max-width: 767px) {
    .wj-container { padding: 0 16px; }
    .wj-logo img { height: 30px; }
    .wj-logo .wj-logo-txt { font-size: 18px; }
    .wj-hero-txt h1 { font-size: 26px; }
    .wj-hero-cards { grid-template-columns: repeat(2, 1fr); padding: 18px 14px; gap: 14px; }
    .wj-hero-card b { font-size: 20px; }
    .wj-sec-head h2 { font-size: 26px; }
    .wj-feat-grid, .wj-video-list, .wj-article-list { grid-template-columns: 1fr; }
    .wj-dl-grid { grid-template-columns: repeat(2, 1fr); gap: 14px; }
    .wj-dl-card { padding: 26px 14px; }
    .wj-dl-card img { width: 60px; height: 60px; }
    .wj-footer-main { grid-template-columns: 1fr; gap: 28px; text-align: center; }
    .wj-footer h4::after { left: 50%; transform: translateX(-50%); }
    .wj-footer .wj-f-logo { justify-content: center; }
    .wj-footer .wj-f-qr { flex-direction: column; align-items: center; }
    .wj-footer .wj-f-bottom { flex-direction: column; text-align: center; }
    .wj-prod-body { padding: 26px 22px 24px; }
    .wj-tut-item { flex-direction: column; }
    .wj-tut-item img { width: 100%; aspect-ratio: 16 / 9; }
    .wj-tut-side { grid-template-columns: 1fr; }
    .wj-split-txt h3 { font-size: 21px; }
    .wj-cta h3 { font-size: 21px; }
    .wj-about-box p { font-size: 14px; }
    .wj-float { right: 12px; bottom: 80px; }
    .wj-gotop { right: 12px; bottom: 22px; }
}

/* ---------- 18. 辅助工具类 ---------- */
.wj-center { text-align: center; }
.wj-mt-0 { margin-top: 0; }
.wj-note {
    background: #fff7f5; border: 1px solid #ffd9d0; color: #b3533f;
    border-radius: var(--radius-sm); padding: 12px 18px; font-size: 13.5px;
    margin-top: 22px; line-height: 1.8;
}
.wj-note b { color: var(--accent); }
.wj-divider {
    width: 100%; height: 1px; background: var(--border); margin: 20px 0; border: 0;
}