/* ============ 模智声官网 + 管理后台样式 ============ */
* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
    --primary: #2f54eb;
    --primary-dark: #1d39c4;
    --primary-light: #f0f5ff;
    --violet: #722ed1;
    --cyan: #13c2c2;
    --text: #1f2733;
    --text-2: #52616f;
    --text-3: #8a97a6;
    --border: #e6ebf2;
    --bg: #f6f8fb;
    --success: #52c41a;
    --danger: #f5222d;
    --warning: #fa8c16;
    --radius: 14px;
    --shadow-sm: 0 2px 10px rgba(31, 56, 116, .06);
    --shadow-md: 0 10px 30px rgba(31, 56, 116, .10);
    --shadow-lg: 0 18px 44px rgba(47, 84, 235, .16);
}

html { scroll-behavior: smooth; }
/* 任何情况下都不出现左右滚动条 */
html, body { overflow-x: hidden; }
/* 媒体元素全局防溢出兑底 */
img, video, audio { max-width: 100%; }

body {
    font-family: "Microsoft YaHei", "微软雅黑", "Segoe UI", sans-serif;
    color: var(--text);
    background: #fff;
    font-size: 15px;
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}

.container { max-width: 1140px; margin: 0 auto; padding: 0 20px; }
a { color: var(--primary); text-decoration: none; transition: color .2s; }
a:hover { color: var(--primary-dark); }

::selection { background: rgba(47, 84, 235, .18); }

/* ============ 顶栏 ============ */
.topbar {
    background: rgba(255, 255, 255, .82);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid rgba(230, 235, 242, .8);
    position: sticky; top: 0; z-index: 100;
}
.topbar-inner {
    display: flex; align-items: center; justify-content: space-between;
    min-height: 66px; flex-wrap: wrap; gap: 2px 16px; padding: 8px 0;
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand-logo-img { height: 40px; width: auto; display: block; max-width: 60vw; }
.nav { display: flex; align-items: center; gap: 4px; flex-wrap: wrap; justify-content: flex-end; }
.nav a { padding: 8px 16px; border-radius: 999px; color: var(--text-2); font-size: 15px; transition: all .2s; }
.nav a:hover { background: var(--primary-light); color: var(--primary); }
.nav a.active {
    background: linear-gradient(120deg, var(--primary), #597ef7);
    color: #fff; font-weight: 600; box-shadow: 0 4px 14px rgba(47, 84, 235, .32);
}

/* ============ 首页 Hero ============ */
.hero {
    position: relative; overflow: hidden;
    background: linear-gradient(135deg, #141f6f 0%, #1d39c4 45%, #2f54eb 75%, #597ef7 100%);
    color: #fff; padding: 110px 0 120px; text-align: center;
}
.hero::before, .hero::after {
    content: ""; position: absolute; border-radius: 50%; filter: blur(6px); pointer-events: none;
}
.hero::before {
    width: 520px; height: 520px; right: -140px; top: -180px;
    background: radial-gradient(circle, rgba(114, 46, 209, .45) 0%, transparent 65%);
}
.hero::after {
    width: 460px; height: 460px; left: -160px; bottom: -200px;
    background: radial-gradient(circle, rgba(19, 194, 194, .35) 0%, transparent 65%);
}
.hero .container { position: relative; z-index: 1; }
.hero h1 {
    font-size: 46px; font-weight: 800; letter-spacing: 6px;
    text-shadow: 0 6px 24px rgba(0, 0, 0, .18);
    animation: fadeUp .7s ease both;
}
.hero p.sub {
    margin-top: 20px; font-size: 18px; opacity: .94; letter-spacing: 1px;
    animation: fadeUp .7s .12s ease both;
}
.hero .tags {
    margin-top: 28px; display: flex; justify-content: center; gap: 12px; flex-wrap: wrap;
    animation: fadeUp .7s .24s ease both;
}
.hero .tags span {
    background: rgba(255, 255, 255, .12); border: 1px solid rgba(255, 255, 255, .32);
    padding: 6px 18px; border-radius: 999px; font-size: 13.5px; backdrop-filter: blur(4px);
}
.hero .btns { margin-top: 38px; display: flex; justify-content: center; gap: 16px; animation: fadeUp .7s .36s ease both; }

@keyframes fadeUp {
    from { opacity: 0; transform: translateY(18px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ============ 按钮 ============ */
.btn {
    display: inline-block; padding: 12px 32px; border-radius: 999px; font-size: 16px;
    cursor: pointer; border: none; transition: all .22s ease; line-height: 1.4;
}
.btn:active { transform: scale(.97); }
.btn-light { background: #fff; color: var(--primary-dark); font-weight: 600; box-shadow: 0 8px 24px rgba(0, 0, 0, .14); }
.btn-light:hover { background: #f0f5ff; color: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 12px 30px rgba(0, 0, 0, .18); }
.btn-outline { background: rgba(255, 255, 255, .06); color: #fff; border: 1.5px solid rgba(255, 255, 255, .65); }
.btn-outline:hover { background: rgba(255, 255, 255, .16); color: #fff; transform: translateY(-2px); }
.btn-primary {
    background: linear-gradient(120deg, var(--primary), #597ef7); color: #fff;
    box-shadow: 0 6px 18px rgba(47, 84, 235, .30);
}
.btn-primary:hover { background: linear-gradient(120deg, var(--primary-dark), var(--primary)); color: #fff; transform: translateY(-2px); box-shadow: 0 10px 24px rgba(47, 84, 235, .38); }
.btn-sm { padding: 5px 14px; font-size: 13px; border-radius: 8px; box-shadow: none; }
.btn-danger-sm {
    padding: 5px 14px; font-size: 13px; border-radius: 8px;
    background: #fff1f0; color: var(--danger); border: 1px solid #ffa39e; transition: all .2s;
}
.btn-danger-sm:hover { background: var(--danger); color: #fff; }

/* ============ 区块 ============ */
.section { padding: 84px 0; }
.section-gray { background: linear-gradient(180deg, #f6f8fb 0%, #eef3fa 100%); }
.section-title { text-align: center; font-size: 31px; font-weight: 800; letter-spacing: 2px; position: relative; }
.section-title::after {
    content: ""; display: block; width: 46px; height: 4px; border-radius: 4px;
    background: linear-gradient(90deg, var(--primary), var(--violet));
    margin: 14px auto 0;
}
.section-desc { text-align: center; color: var(--text-3); margin-top: 16px; font-size: 15px; }

/* ============ 功能卡片 ============ */
.card-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; margin-top: 50px; }
.card {
    background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
    padding: 30px 24px; transition: all .28s ease; position: relative; overflow: hidden;
}
.card::before {
    content: ""; position: absolute; inset: 0 0 auto 0; height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--violet));
    opacity: 0; transition: opacity .28s;
}
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: transparent; }
.card:hover::before { opacity: 1; }
.card .icon {
    width: 52px; height: 52px; border-radius: 14px; font-size: 26px;
    display: flex; align-items: center; justify-content: center; margin-bottom: 18px;
    background: linear-gradient(135deg, var(--primary), #597ef7);
    box-shadow: 0 6px 16px rgba(47, 84, 235, .28);
}
/* 每张卡片图标渐变配色（八大功能） */
.card-grid .card:nth-child(2) .icon { background: linear-gradient(135deg, #13c2c2, #36cfc9); box-shadow: 0 6px 16px rgba(19, 194, 194, .28); }
.card-grid .card:nth-child(3) .icon { background: linear-gradient(135deg, #722ed1, #9254de); box-shadow: 0 6px 16px rgba(114, 46, 209, .28); }
.card-grid .card:nth-child(4) .icon { background: linear-gradient(135deg, #eb2f96, #f759ab); box-shadow: 0 6px 16px rgba(235, 47, 150, .28); }
.card-grid .card:nth-child(5) .icon { background: linear-gradient(135deg, #fa8c16, #ffa940); box-shadow: 0 6px 16px rgba(250, 140, 22, .28); }
.card-grid .card:nth-child(6) .icon { background: linear-gradient(135deg, #1890ff, #40a9ff); box-shadow: 0 6px 16px rgba(24, 144, 255, .28); }
.card-grid .card:nth-child(7) .icon { background: linear-gradient(135deg, #52c41a, #73d13d); box-shadow: 0 6px 16px rgba(82, 196, 26, .28); }
.card-grid .card:nth-child(8) .icon { background: linear-gradient(135deg, #597ef7, #85a5ff); box-shadow: 0 6px 16px rgba(89, 126, 247, .28); }
.card h3 { font-size: 18px; margin-bottom: 10px; letter-spacing: 1px; }
.card p { color: var(--text-2); font-size: 14px; }

/* ============ 步骤 ============ */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-top: 50px; position: relative; }
.steps::before {
    content: ""; position: absolute; top: 26px; left: 12%; right: 12%;
    border-top: 2px dashed #c9d6f5; z-index: 0;
}
.step { text-align: center; padding: 4px 16px; position: relative; z-index: 1; }
.step .num {
    width: 52px; height: 52px; border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), #597ef7);
    color: #fff; font-size: 20px; font-weight: 700;
    display: inline-flex; align-items: center; justify-content: center;
    box-shadow: 0 8px 20px rgba(47, 84, 235, .32), 0 0 0 6px #fff;
    transition: transform .25s;
}
.step:hover .num { transform: scale(1.1); }
.step h4 { margin-top: 16px; font-size: 16px; }
.step p { color: var(--text-3); font-size: 13px; margin-top: 6px; }

/* ============ CTA 区块 ============ */
.section-cta {
    background: linear-gradient(135deg, #141f6f 0%, #1d39c4 55%, #2f54eb 100%);
    color: #fff; text-align: center; position: relative; overflow: hidden;
}
.section-cta::before {
    content: ""; position: absolute; width: 420px; height: 420px; right: -120px; top: -160px;
    border-radius: 50%; background: radial-gradient(circle, rgba(114, 46, 209, .4) 0%, transparent 65%);
}
.section-cta .container { position: relative; z-index: 1; }
.section-cta .section-title { color: #fff; }
.section-cta .section-title::after { background: linear-gradient(90deg, #fff, rgba(255, 255, 255, .4)); }
.section-cta .section-desc { color: rgba(255, 255, 255, .82); margin-bottom: 32px; }

/* ============ 正文页（关于/协议/功能详情） ============ */
.page-head {
    background: linear-gradient(135deg, #141f6f 0%, #1d39c4 55%, #2f54eb 100%);
    color: #fff; text-align: center; padding: 64px 0; position: relative; overflow: hidden;
}
.page-head::before {
    content: ""; position: absolute; width: 380px; height: 380px; left: -120px; top: -140px;
    border-radius: 50%; background: radial-gradient(circle, rgba(19, 194, 194, .3) 0%, transparent 65%);
}
.page-head h1 { font-size: 33px; letter-spacing: 4px; font-weight: 800; position: relative; }
.page-head p { margin-top: 12px; opacity: .88; font-size: 15px; position: relative; }
.prose { max-width: 860px; margin: 0 auto; padding: 60px 20px; }
.prose h2 {
    font-size: 21px; margin: 38px 0 14px; padding-left: 14px; letter-spacing: 1px;
    border-left: 4px solid; border-image: linear-gradient(180deg, var(--primary), var(--violet)) 1;
}
.prose h2:first-child { margin-top: 0; }
.prose p { color: var(--text-2); margin-bottom: 12px; }
.prose ul, .prose ol { color: var(--text-2); padding-left: 24px; margin-bottom: 12px; }
.prose li { margin-bottom: 7px; }
.prose li::marker { color: var(--primary); }

/* ============ 管理后台 ============ */
.admin-wrap { padding: 36px 0 60px; }
.admin-title { font-size: 24px; font-weight: 700; margin-bottom: 24px; }
.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 20px; margin-bottom: 30px; }
.stat-card {
    background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
    padding: 22px 24px; box-shadow: var(--shadow-sm); transition: all .22s;
}
.stat-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.stat-card .label { color: var(--text-3); font-size: 14px; }
.stat-card .value {
    font-size: 34px; font-weight: 800; margin-top: 6px;
    background: linear-gradient(120deg, var(--primary-dark), var(--primary));
    -webkit-background-clip: text; background-clip: text; color: transparent;
}

.panel { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; margin-bottom: 24px; box-shadow: var(--shadow-sm); }
.panel h3 { font-size: 17px; margin-bottom: 16px; }

.toolbar { display: flex; gap: 10px; margin-bottom: 18px; flex-wrap: wrap; align-items: center; }
.toolbar input[type=text], .toolbar select {
    padding: 8px 14px; border: 1px solid var(--border); border-radius: 8px;
    font-size: 14px; min-width: 180px; transition: all .2s; background: #fff;
}
.toolbar input[type=text]:focus, .toolbar select:focus {
    outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(47, 84, 235, .12);
}

table.grid { width: 100%; border-collapse: collapse; font-size: 14px; }
table.grid th { background: #f7f9fc; text-align: left; padding: 11px 12px; border-bottom: 2px solid var(--border); color: var(--text-2); white-space: nowrap; }
table.grid td { padding: 11px 12px; border-bottom: 1px solid var(--border); color: var(--text); vertical-align: middle; }
table.grid tr:hover td { background: #f8faff; }
.table-scroll { overflow-x: auto; }

.badge { display: inline-block; padding: 2px 10px; border-radius: 999px; font-size: 12px; }
.badge-ok { background: #f6ffed; color: var(--success); border: 1px solid #b7eb8f; }
.badge-fail { background: #fff1f0; color: var(--danger); border: 1px solid #ffa39e; }
.badge-stop { background: #fff1f0; color: var(--danger); border: 1px solid #ffa39e; }
.badge-normal { background: #f6ffed; color: var(--success); border: 1px solid #b7eb8f; }
.badge-mod { background: var(--primary-light); color: var(--primary); border: 1px solid #adc6ff; }

.muted { color: var(--text-3); font-size: 13px; }
.empty { text-align: center; color: var(--text-3); padding: 40px 0; }

/* ============ 分页 ============ */
.pagination { display: flex; gap: 6px; justify-content: center; margin-top: 24px; flex-wrap: wrap; }
.pagination a, .pagination span { padding: 6px 13px; border: 1px solid var(--border); border-radius: 8px; color: var(--text-2); font-size: 14px; }
.pagination a:hover { border-color: var(--primary); color: var(--primary); }
.pagination span.current { background: linear-gradient(120deg, var(--primary), #597ef7); border-color: transparent; color: #fff; }
.pagination span.disabled { color: #ccc; background: #fafafa; }
.pagination .pg-info { border: none; color: var(--text-3); }

/* ============ 表单（管理登录） ============ */
.login-box {
    max-width: 400px; margin: 80px auto; background: #fff;
    border: 1px solid var(--border); border-radius: 18px; padding: 42px 36px;
    box-shadow: var(--shadow-md);
}
.login-box h2 { text-align: center; font-size: 22px; margin-bottom: 26px; letter-spacing: 2px; }
.form-item { margin-bottom: 18px; }
.form-item label { display: block; font-size: 14px; color: var(--text-2); margin-bottom: 6px; }
.form-item input {
    width: 100%; padding: 11px 14px; border: 1px solid var(--border); border-radius: 10px;
    font-size: 15px; transition: all .2s;
}
.form-item input:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(47, 84, 235, .12); }
.login-btn { width: 100%; margin-top: 6px; }
.alert-error { background: #fff1f0; border: 1px solid #ffa39e; color: var(--danger); padding: 9px 14px; border-radius: 10px; font-size: 14px; margin-bottom: 16px; }
.alert-ok { background: #f6ffed; border: 1px solid #b7eb8f; color: var(--success); padding: 9px 14px; border-radius: 10px; font-size: 14px; margin-bottom: 16px; }

/* ============ 注册页（左图右表单） ============ */
.auth-card {
    max-width: 980px; margin: 64px auto; display: flex;
    background: #fff; border: 1px solid var(--border); border-radius: 18px;
    overflow: hidden; box-shadow: var(--shadow-md);
}
.auth-side { position: relative; width: 44%; min-height: 640px; background: #0b1e4b; }
.auth-side-img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.auth-side-overlay {
    position: absolute; left: 0; right: 0; bottom: 0; padding: 70px 26px 26px;
    background: linear-gradient(180deg, transparent 0%, rgba(7, 18, 48, .85) 72%);
}
.auth-logo { display: block; width: 100%; border-radius: 12px; box-shadow: 0 10px 28px rgba(0, 0, 0, .35); }
.auth-form { flex: 1; padding: 46px 46px 34px; }
.auth-form h2 { text-align: center; font-size: 22px; margin-bottom: 24px; letter-spacing: 2px; }
.auth-tip { text-align: center; margin-top: 18px; font-size: 13px; color: var(--text-3); }

/* ============ 作品体验 ============ */
.showcase-wrap { padding: 70px 20px 80px; }
.show-row {
    display: flex; gap: 36px; align-items: stretch;
    background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
    padding: 30px; box-shadow: var(--shadow-sm); margin-bottom: 34px;
    transition: box-shadow .28s ease;
}
.show-row:hover { box-shadow: var(--shadow-lg); }
.show-shot { flex: 0 0 46%; margin: 0; display: flex; flex-direction: column; }
.show-shot img {
    width: 100%; border-radius: 12px; border: 1px solid var(--border);
    box-shadow: var(--shadow-md); background: #f5f7fb;
}
.show-shot figcaption { margin-top: 12px; text-align: center; color: var(--text-3); font-size: 13px; letter-spacing: 1px; }
.show-body { flex: 1; display: flex; flex-direction: column; min-width: 0; }
.show-body h3 { font-size: 21px; letter-spacing: 1px; margin-bottom: 10px; }
.show-intro { color: var(--text-2); font-size: 14px; }
.show-steps { margin: 14px 0 18px; padding-left: 20px; }
.show-steps li { color: var(--text-2); font-size: 14px; line-height: 1.8; margin-bottom: 6px; }
.show-steps li::marker { color: var(--primary); font-weight: 700; }
.show-result {
    margin-top: auto; padding: 16px 18px; border-radius: 12px;
    background: #f6f8ff; border: 1px dashed #adc6ff;
}
.show-result-head { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; flex-wrap: wrap; }
.show-result-badge {
    background: linear-gradient(135deg, var(--primary), var(--violet)); color: #fff;
    font-size: 12px; padding: 4px 14px; border-radius: 999px; letter-spacing: 1px;
}
.show-result-note { color: var(--text-3); font-size: 13px; }
.show-result audio { width: 100%; display: block; height: 44px; }
.show-result video {
    width: 100%; display: block; max-height: 340px;
    border-radius: 10px; background: #000;
}

/* ============ 联系我们 ============ */
.contact-wrap { padding: 70px 20px 80px; }
.contact-hero {
    display: flex; align-items: center; gap: 48px;
    background: linear-gradient(135deg, #f0f5ff 0%, #f6f0ff 100%);
    border: 1px solid var(--border); border-radius: var(--radius);
    padding: 44px 48px; box-shadow: var(--shadow-sm);
}
.contact-hero-text { flex: 1.1; }
.contact-hero-text h2 { font-size: 27px; letter-spacing: 1px; margin-bottom: 14px; }
.contact-hero-text p { color: var(--text-2); }
.contact-hero-text ul { margin-top: 16px; }
.contact-hero-text li { color: var(--text-2); font-size: 14px; margin-bottom: 8px; }
.contact-hero-img { flex: 1; display: flex; justify-content: center; }
.contact-hero-img img {
    width: 100%; max-width: 430px; border-radius: var(--radius);
    filter: drop-shadow(0 14px 30px rgba(47, 84, 235, .18));
}
.contact-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; margin-top: 34px; }
.contact-card {
    background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
    padding: 30px 22px; text-align: center; transition: all .28s ease; position: relative; overflow: hidden;
}
.contact-card::before {
    content: ""; position: absolute; inset: 0 0 auto 0; height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--violet));
    opacity: 0; transition: opacity .28s;
}
.contact-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: transparent; }
.contact-card:hover::before { opacity: 1; }
.contact-card .icon {
    width: 56px; height: 56px; border-radius: 16px; font-size: 27px;
    display: inline-flex; align-items: center; justify-content: center; margin-bottom: 14px;
}
.icon-wechat { background: linear-gradient(135deg, #52c41a, #73d13d); box-shadow: 0 6px 16px rgba(82, 196, 26, .28); }
.icon-qq { background: linear-gradient(135deg, #1890ff, #40a9ff); box-shadow: 0 6px 16px rgba(24, 144, 255, .28); }
.icon-mail { background: linear-gradient(135deg, #fa8c16, #ffa940); box-shadow: 0 6px 16px rgba(250, 140, 22, .28); }
.icon-web { background: linear-gradient(135deg, var(--primary), #597ef7); box-shadow: 0 6px 16px rgba(47, 84, 235, .28); }
.contact-card h3 { font-size: 17px; letter-spacing: 1px; margin-bottom: 8px; }
.contact-account { font-size: 16px; font-weight: 700; color: var(--primary-dark); word-break: break-all; }
.contact-account a { color: var(--primary-dark); }
.contact-desc { margin-top: 10px; color: var(--text-3); font-size: 13px; line-height: 1.8; }
.contact-tips {
    margin-top: 34px; padding: 26px 32px; border-radius: var(--radius);
    background: linear-gradient(120deg, var(--primary-light), #f9f0ff);
    border: 1px dashed #adc6ff;
}
.contact-tips h3 { font-size: 16px; margin-bottom: 8px; color: var(--primary-dark); }
.contact-tips p { color: var(--text-2); font-size: 14px; }

/* ============ 页脚 ============ */
.footer {
    background: #fff; border-top: 1px solid var(--border);
    color: var(--text-3); text-align: center; padding: 34px 0 30px; font-size: 14px;
}
.footer-logo { display: block; margin: 16px auto 0; height: 46px; width: auto; }
.footer-icp { margin-top: 10px; font-size: 13px; color: var(--text-3); }
.footer-icp a { color: var(--text-3); text-decoration: none; }
.footer-icp a:hover { color: var(--primary); text-decoration: underline; }
.footer-links { display: flex; justify-content: center; gap: 28px; margin-bottom: 12px; }
.footer-links a { color: var(--text-2); font-size: 14px; }
.footer-links a:hover { color: var(--primary); }

/* ============ 响应式 ============ */
@media (max-width: 1000px) {
    .card-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 860px) {
    .card-grid { grid-template-columns: 1fr 1fr; }
    .contact-grid { grid-template-columns: 1fr 1fr; }
    .contact-hero { flex-direction: column; padding: 32px 24px; gap: 26px; }
    .show-row { flex-direction: column; gap: 22px; padding: 22px; }
    .show-shot { flex: none; }
    .steps { grid-template-columns: 1fr 1fr; }
    .steps::before { display: none; }
    .stat-grid { grid-template-columns: 1fr 1fr; }
    .hero h1 { font-size: 32px; letter-spacing: 3px; }
    .hero { padding: 80px 0 90px; }
    .topbar-inner { justify-content: center; }
    .nav { justify-content: center; }
    .nav a { padding: 6px 10px; font-size: 14px; }
    .brand-logo-img { height: 32px; }
    .auth-card { flex-direction: column; margin: 28px 16px; }
    .auth-side { width: 100%; min-height: 260px; }
    .auth-side-overlay { padding: 46px 18px 18px; }
    .auth-form { padding: 32px 24px 26px; }
    .section { padding: 60px 0; }
}
@media (max-width: 560px) {
    .card-grid { grid-template-columns: 1fr; }
    .contact-grid { grid-template-columns: 1fr; }
    .steps { grid-template-columns: 1fr; }
    .stat-grid { grid-template-columns: 1fr; }
    .hero .btns { flex-direction: column; align-items: center; }
    .hero h1 { font-size: 26px; letter-spacing: 2px; }
    .hero p.sub { font-size: 15px; }
    .page-head h1 { font-size: 24px; letter-spacing: 2px; }
    .page-head p { font-size: 13px; }
    .section-title { font-size: 24px; }
    .nav a { padding: 5px 9px; font-size: 13px; }
    .brand-logo-img { height: 28px; }
    .footer-links { gap: 14px; flex-wrap: wrap; }
    .showcase-wrap, .contact-wrap { padding: 44px 14px 56px; }
    .show-row { padding: 16px; gap: 16px; margin-bottom: 22px; }
    .show-body h3 { font-size: 18px; }
    .show-result { padding: 12px 12px; }
    .contact-tips { padding: 20px 18px; }
    .auth-form { padding: 28px 18px 22px; }
}

/* ============ 用户服务管理（后台） ============ */
.tabs { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 18px; }
.tabs a { padding: 7px 16px; border: 1px solid var(--border); border-radius: 999px; font-size: 14px; color: var(--text-2); background: #fafbff; }
.tabs a:hover { border-color: var(--primary); color: var(--primary); }
.tabs a.current { background: linear-gradient(120deg, var(--primary-dark), var(--primary)); border-color: transparent; color: #fff; }
.badge-warn { background: #fffbe6; color: #d48806; border: 1px solid #ffe58f; }
details > summary { cursor: pointer; list-style: none; display: inline-block; }
details > summary::-webkit-details-marker { display: none; }
.row-forms { display: flex; gap: 22px; flex-wrap: wrap; padding: 14px; margin-top: 10px; background: #f7f9fe; border: 1px solid var(--border); border-radius: 10px; }
.row-form { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; font-size: 13px; color: var(--text-2); }
.row-form strong { font-size: 13px; color: var(--text-1); }
.row-form input[type=text], .row-form input[type=password], .row-form input[type=number], .row-form select {
    padding: 6px 10px; border: 1px solid var(--border); border-radius: 8px; font-size: 13px;
}
.row-form input[type=text]:focus, .row-form input[type=password]:focus, .row-form input[type=number]:focus, .row-form select:focus {
    outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(47, 84, 235, .12);
}
.row-form label { display: inline-flex; align-items: center; gap: 5px; }

/* 服务收费统计条 */
.fee-stats { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 18px; }
.fee-stat { display: flex; align-items: baseline; gap: 8px; padding: 10px 18px; background: #fafbff; border: 1px solid var(--border); border-radius: 10px; }
.fee-stat .label { font-size: 13px; color: var(--text-3); }
.fee-stat .value { font-size: 18px; font-weight: 700; color: var(--text-1); }

/* ============ AI 智能客服聊天 ============ */
/* 联系页内嵌聊天区 */
.chat-section { margin-top: 40px; }
.chat-section h2 { font-size: 22px; margin-bottom: 6px; }
.chat-box {
    margin-top: 16px; border: 1px solid var(--border); border-radius: var(--radius);
    background: #fafbff; overflow: hidden;
}
.chat-messages { height: 320px; overflow-y: auto; padding: 18px; }
.chat-msg { display: flex; margin-bottom: 12px; }
.chat-msg-user { justify-content: flex-end; }
.chat-msg-bot { justify-content: flex-start; }
.chat-bubble {
    max-width: 72%; padding: 10px 16px; border-radius: 16px; font-size: 14px; line-height: 1.7;
    word-break: break-word; white-space: pre-wrap;
}
.chat-msg-user .chat-bubble {
    background: linear-gradient(135deg, var(--primary), #597ef7); color: #fff;
    border-bottom-right-radius: 4px;
}
.chat-msg-bot .chat-bubble {
    background: #fff; border: 1px solid var(--border); color: var(--text-1);
    border-bottom-left-radius: 4px;
}
.chat-input-row {
    display: flex; gap: 10px; padding: 12px 16px; border-top: 1px solid var(--border); background: #fff;
}
.chat-input-row input {
    flex: 1; padding: 10px 14px; border: 1px solid var(--border); border-radius: 999px;
    font-size: 14px; outline: none;
}
.chat-input-row input:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(47,84,235,.1); }
.chat-input-row button {
    padding: 10px 24px; border: none; border-radius: 999px; cursor: pointer; font-size: 14px;
    background: linear-gradient(135deg, var(--primary-dark), var(--primary)); color: #fff; transition: opacity .2s;
}
.chat-input-row button:disabled { opacity: .5; cursor: not-allowed; }
.chat-input-row button:hover:not(:disabled) { opacity: .85; }
.chat-contact-form { margin-top: 18px; }
.chat-contact-form h4 { font-size: 15px; margin-bottom: 10px; color: var(--primary-dark); }

/* 全站悬浮聊天气泡 */
.chat-float-btn {
    position: fixed; bottom: 28px; right: 28px; z-index: 9999;
    display: flex; flex-direction: column; align-items: center; gap: 4px;
    cursor: pointer; padding: 8px 12px; border-radius: 16px;
    background: #fff; border: 1px solid var(--border);
    box-shadow: 0 6px 24px rgba(47,84,235,.25); transition: transform .2s, box-shadow .2s;
}
.chat-float-btn:hover { transform: translateY(-3px); box-shadow: 0 10px 32px rgba(47,84,235,.35); }
.chat-float-img { width: 64px; height: 64px; border-radius: 10px; object-fit: cover; }
.chat-float-label { font-size: 13px; color: var(--primary-dark); font-weight: 700; white-space: nowrap; }
.chat-float-panel {
    position: fixed; bottom: 120px; right: 28px; z-index: 9998;
    width: 360px; max-height: 520px; flex-direction: column;
    background: #fff; border: 1px solid var(--border); border-radius: 16px;
    box-shadow: 0 12px 48px rgba(0,0,0,.18); overflow: hidden;
}
.chat-float-head {
    display: flex; justify-content: space-between; align-items: center;
    padding: 12px 16px; background: linear-gradient(135deg, var(--primary-dark), var(--primary));
    color: #fff; font-size: 15px; font-weight: 600;
}
.chat-float-close {
    background: none; border: none; color: #fff; font-size: 22px; cursor: pointer; line-height: 1;
}
.chat-float-body { flex: 1; display: flex; flex-direction: column; }
.chat-float-body .chat-messages { height: 280px; padding: 12px; }
.chat-float-body .chat-input-row { padding: 8px 12px; }
.chat-float-body .chat-input-row input { padding: 8px 12px; font-size: 13px; }
.chat-float-body .chat-input-row button { padding: 8px 16px; font-size: 13px; }
.chat-contact-mini { padding: 8px 12px 12px; border-top: 1px solid var(--border); }
.chat-contact-mini input {
    padding: 6px 8px; border: 1px solid var(--border); border-radius: 6px; font-size: 12px;
}

@media (max-width: 560px) {
    .chat-float-panel { width: calc(100vw - 24px); right: 12px; bottom: 110px; }
    .chat-float-btn { bottom: 18px; right: 18px; padding: 6px 10px; }
    .chat-float-img { width: 52px; height: 52px; }
    .chat-float-label { font-size: 11px; }
}