:root {
    --blue-900: #082544;
    --blue-800: #0b3b6f;
    --blue-700: #12508f;
    --blue-600: #1565c0;
    --blue-50: #eef5fc;
    --orange: #f97316;
    --orange-dark: #d95f04;
    --ink: #12263f;
    --ink-2: #43566e;
    --ink-3: #6c7d91;
    --line: #dfe7f0;
    --bg: #f4f7fb;
    --white: #ffffff;
    --green: #0f9d63;
    --radius: 12px;
    --shadow-sm: 0 2px 10px rgba(11, 59, 111, 0.06);
    --shadow: 0 12px 32px rgba(11, 59, 111, 0.10);
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
    margin: 0;
    font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, sans-serif;
    color: var(--ink);
    background: var(--bg);
    font-size: 15px;
    line-height: 1.65;
}

a { color: var(--blue-700); text-decoration: none; }
a:hover { color: var(--blue-600); }

img { max-width: 100%; }

h1, h2, h3, h4 { margin: 0; line-height: 1.3; font-weight: 700; letter-spacing: -0.2px; }

p { margin: 0; }

.container {
    width: 100%;
    max-width: 1180px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 顶部导航 */
.site-header {
    position: sticky;
    top: 0;
    z-index: 40;
    background: rgba(255, 255, 255, 0.94);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--line);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    min-height: 68px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--blue-900);
    font-weight: 800;
    font-size: 19px;
    letter-spacing: 0.5px;
    white-space: nowrap;
}

.logo-mark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    border-radius: 10px;
    background: linear-gradient(140deg, var(--blue-600), var(--blue-800));
    color: #fff;
    font-size: 16px;
    box-shadow: var(--shadow-sm);
}

.logo-sub {
    display: block;
    font-size: 11px;
    font-weight: 500;
    color: var(--ink-3);
    letter-spacing: 1.5px;
}

.site-nav {
    display: flex;
    align-items: center;
    gap: 4px;
    flex-wrap: wrap;
}

.site-nav a {
    padding: 8px 14px;
    border-radius: 8px;
    color: var(--ink-2);
    font-weight: 500;
    white-space: nowrap;
}

.site-nav a:hover { background: var(--blue-50); color: var(--blue-700); }
.site-nav a.active { background: var(--blue-50); color: var(--blue-700); font-weight: 700; }

.header-phone {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--ink-2);
    font-size: 13px;
    white-space: nowrap;
}

.header-phone strong { color: var(--blue-800); font-size: 16px; letter-spacing: 0.5px; }

/* 按钮 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 11px 22px;
    border-radius: 9px;
    border: 1px solid transparent;
    font-size: 15px;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.18s ease;
    white-space: nowrap;
}

.btn-primary {
    background: var(--blue-700);
    color: #fff;
    box-shadow: 0 6px 18px rgba(21, 101, 192, 0.24);
}

.btn-primary:hover { background: var(--blue-600); color: #fff; transform: translateY(-1px); }

.btn-accent {
    background: var(--orange);
    color: #fff;
    box-shadow: 0 6px 18px rgba(249, 115, 22, 0.28);
}

.btn-accent:hover { background: var(--orange-dark); color: #fff; transform: translateY(-1px); }

.btn-ghost {
    background: #fff;
    border-color: var(--line);
    color: var(--blue-800);
}

.btn-ghost:hover { border-color: var(--blue-600); color: var(--blue-600); }

.btn-sm { padding: 8px 15px; font-size: 13.5px; border-radius: 8px; }
.btn-block { width: 100%; }
.btn-lg { padding: 14px 30px; font-size: 16px; }

/* 通用卡片 */
.card {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
}

.section { padding: 64px 0; }
.section-sm { padding: 40px 0; }

.section-head {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 20px;
    margin-bottom: 28px;
    flex-wrap: wrap;
}

.section-head h2 { font-size: 26px; }
.section-head p { color: var(--ink-3); font-size: 14px; margin-top: 6px; }

.eyebrow {
    display: inline-block;
    color: var(--orange);
    font-size: 12.5px;
    font-weight: 700;
    letter-spacing: 2px;
    margin-bottom: 8px;
}

/* 首页 Hero */
.hero {
    position: relative;
    background: radial-gradient(circle at 78% 12%, rgba(21, 101, 192, 0.45), transparent 45%),
                linear-gradient(135deg, #061d36 0%, #0b3b6f 55%, #12508f 100%);
    color: #fff;
    overflow: hidden;
    padding: 62px 0 76px;
}

.hero::after {
    content: "";
    position: absolute;
    inset: 0;
    background-image: linear-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px),
                      linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
    background-size: 44px 44px;
    pointer-events: none;
}

.hero-grid {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 1.05fr 0.95fr;
    gap: 52px;
    align-items: center;
}

.hero h1 {
    font-size: 40px;
    line-height: 1.28;
    letter-spacing: 0.5px;
}

.hero h1 span { color: #ffb26b; }

.hero-desc {
    color: rgba(255, 255, 255, 0.78);
    font-size: 15.5px;
    margin-top: 18px;
    max-width: 520px;
}

.hero-points {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
    margin-top: 32px;
    max-width: 540px;
}

.hero-point {
    padding: 14px 16px;
    border: 1px solid rgba(255, 255, 255, 0.16);
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.06);
}

.hero-point b { display: block; font-size: 17px; color: #fff; }
.hero-point small { color: rgba(255, 255, 255, 0.62); font-size: 12px; }

.hero-actions { display: flex; gap: 14px; margin-top: 32px; flex-wrap: wrap; }

.hero-card {
    background: #fff;
    border-radius: 16px;
    padding: 26px 26px 22px;
    box-shadow: 0 24px 60px rgba(2, 16, 33, 0.35);
    color: var(--ink);
}

.hero-card h3 { font-size: 18px; margin-bottom: 4px; }
.hero-card .muted { color: var(--ink-3); font-size: 13px; margin-bottom: 18px; }

/* 表单 */
.form-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
}

.form-grid .full { grid-column: 1 / -1; }

.field label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--ink-2);
    margin-bottom: 6px;
}

.field label .req { color: var(--orange); margin-left: 2px; }

.input-wrap { position: relative; }

.field input,
.field select,
.field textarea {
    width: 100%;
    padding: 11px 13px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: #fff;
    color: var(--ink);
    font-size: 14.5px;
    font-family: inherit;
    transition: border-color 0.15s, box-shadow 0.15s;
}

.field textarea { resize: vertical; min-height: 96px; }

.field input:focus,
.field select:focus,
.field textarea:focus {
    outline: none;
    border-color: var(--blue-600);
    box-shadow: 0 0 0 3px rgba(21, 101, 192, 0.12);
}

.field .hint { display: block; color: var(--ink-3); font-size: 12px; margin-top: 5px; }

.input-unit {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--ink-3);
    font-size: 13px;
    pointer-events: none;
}

.field input.has-unit { padding-right: 56px; }

.checkline {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 9px 12px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: #fff;
    font-size: 13.5px;
    color: var(--ink-2);
    height: 43px;
}

.checkline input { width: 16px; height: 16px; accent-color: var(--blue-600); }

.form-error {
    color: #c62828;
    font-size: 12px;
    margin-top: 4px;
}

.alert {
    padding: 13px 16px;
    border-radius: 9px;
    font-size: 14px;
    margin-bottom: 20px;
    border: 1px solid transparent;
}

.alert-info { background: var(--blue-50); border-color: #cfe3f7; color: var(--blue-800); }
.alert-warn { background: #fff7ed; border-color: #fed7aa; color: #9a3412; }
.alert-error { background: #fef2f2; border-color: #fecaca; color: #991b1b; }
.alert-success { background: #ecfdf5; border-color: #a7f3d0; color: #065f46; }

/* 分类卡片 */
.category-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 18px;
}

.category-card {
    display: block;
    padding: 22px;
    border-radius: var(--radius);
    background: #fff;
    border: 1px solid var(--line);
    box-shadow: var(--shadow-sm);
    transition: all 0.2s ease;
}

.category-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow);
    border-color: #c9dcf2;
    color: var(--ink);
}

.category-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    border-radius: 10px;
    background: var(--blue-50);
    color: var(--blue-700);
    font-size: 19px;
    font-weight: 800;
    margin-bottom: 12px;
}

.category-card h3 { font-size: 16.5px; }
.category-card p { color: var(--ink-3); font-size: 13px; margin-top: 6px; }
.category-card .count { color: var(--orange); font-size: 12.5px; font-weight: 700; margin-top: 10px; display: block; }

/* 型号列表 */
.pump-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
}

.pump-card {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 22px;
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    gap: 14px;
    transition: all 0.2s ease;
}

.pump-card:hover { box-shadow: var(--shadow); border-color: #c9dcf2; }

.pump-card-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 10px; }
.pump-model { font-size: 17px; font-weight: 800; color: var(--blue-900); }
.pump-brand { font-size: 12px; color: var(--ink-3); margin-top: 2px; }

.pump-specs {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
    padding-top: 14px;
    border-top: 1px dashed var(--line);
}

.spec-item small { display: block; color: var(--ink-3); font-size: 11.5px; }
.spec-item b { font-size: 15px; color: var(--ink); font-weight: 700; }

.pump-card-foot { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-top: auto; }
.price { color: var(--orange); font-size: 16px; font-weight: 800; }
.price small { color: var(--ink-3); font-weight: 500; font-size: 11px; }

/* 徽章 */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 3px 10px;
    border-radius: 99px;
    font-size: 12px;
    font-weight: 700;
    white-space: nowrap;
}

.badge-blue { background: var(--blue-50); color: var(--blue-700); }
.badge-green { background: #e8f7ef; color: #0a7a4c; }
.badge-orange { background: #fff1e6; color: #b45309; }
.badge-gray { background: #f1f4f8; color: var(--ink-3); }

/* 筛选栏 */
.filter-bar {
    display: flex;
    align-items: flex-end;
    gap: 12px;
    flex-wrap: wrap;
    padding: 18px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    margin-bottom: 24px;
}

.filter-bar .field { min-width: 150px; flex: 1; }
.filter-bar .field.search { flex: 2; min-width: 220px; }

.pill-row { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 24px; }

.pill {
    padding: 8px 16px;
    border-radius: 99px;
    border: 1px solid var(--line);
    background: #fff;
    color: var(--ink-2);
    font-size: 13.5px;
    font-weight: 500;
}

.pill:hover { border-color: var(--blue-600); color: var(--blue-700); }
.pill.active { background: var(--blue-700); border-color: var(--blue-700); color: #fff; font-weight: 700; }

/* 选型结果 */
.result-head {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 22px 24px;
    margin-bottom: 20px;
    display: flex;
    justify-content: space-between;
    gap: 20px;
    flex-wrap: wrap;
    align-items: center;
}

.param-chips { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 10px; }

.chip {
    background: var(--blue-50);
    color: var(--blue-800);
    border-radius: 6px;
    padding: 4px 10px;
    font-size: 12.5px;
    font-weight: 600;
}

.result-list { display: flex; flex-direction: column; gap: 16px; }

.result-card {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.result-card.recommended { border-left: 4px solid var(--green); }
.result-card.alternative { border-left: 4px solid var(--blue-600); }
.result-card.marginal { border-left: 4px solid var(--orange); }

.result-main {
    display: grid;
    grid-template-columns: 1.25fr 1.75fr auto;
    gap: 20px;
    padding: 22px 24px;
    align-items: center;
}

.result-metrics {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 12px;
}

.metric { background: #fafcff; border: 1px solid #eaf0f7; border-radius: 8px; padding: 10px 12px; }
.metric small { display: block; color: var(--ink-3); font-size: 11px; }
.metric b { font-size: 17px; color: var(--blue-900); }
.metric b span { font-size: 11.5px; color: var(--ink-3); font-weight: 500; margin-left: 2px; }

.result-actions { display: flex; flex-direction: column; gap: 8px; align-items: stretch; min-width: 108px; }

.result-warnings {
    border-top: 1px dashed var(--line);
    padding: 12px 24px 16px;
    font-size: 13px;
    color: #92400e;
    background: #fffdf8;
}

.result-warnings ul { margin: 0; padding-left: 18px; }

.chart-panel { padding: 8px 16px 20px; border-top: 1px solid var(--line); background: #fcfdff; }
.chart-panel h4 { font-size: 13px; color: var(--ink-2); padding: 12px 8px 0; }
.chart-wrap { overflow-x: auto; }
.chart-wrap svg { min-width: 560px; }

.curve-svg { width: 100%; height: auto; display: block; }
.chart-grid line { stroke: #e8eef6; stroke-width: 1; }
.chart-tick { fill: #8a9bb0; font-size: 11px; }
.chart-axis-label { fill: #5b6e85; font-size: 12px; }
.chart-line { stroke: var(--blue-600); stroke-width: 2.5; }
.chart-guide { stroke: var(--orange); stroke-width: 1.4; stroke-dasharray: 5 4; }
.chart-point { fill: var(--orange); stroke: #fff; stroke-width: 2; }
.chart-point-label { fill: #b45309; font-size: 11.5px; font-weight: 700; }
.chart-empty { padding: 32px; text-align: center; color: var(--ink-3); font-size: 13px; }

/* 详情页 */
.detail-grid { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 22px; align-items: start; }

.spec-table { width: 100%; border-collapse: collapse; font-size: 14px; }
.spec-table th, .spec-table td { padding: 11px 14px; border-bottom: 1px solid var(--line); text-align: left; }
.spec-table th { width: 38%; color: var(--ink-3); font-weight: 600; background: #fafcff; }
.spec-table tr:last-child th, .spec-table tr:last-child td { border-bottom: none; }

.compare-table { width: 100%; border-collapse: collapse; font-size: 14px; background: #fff; }
.compare-table th, .compare-table td { padding: 13px 16px; border: 1px solid var(--line); text-align: left; vertical-align: top; }
.compare-table th { background: #fafcff; color: var(--ink-2); font-weight: 600; white-space: nowrap; }
.compare-table thead th { background: var(--blue-50); color: var(--blue-900); }
.compare-table .best { background: #f0fdf6; }

/* 步骤 */
.steps { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 18px; counter-reset: step; }
.step { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; position: relative; }
.step .num {
    display: inline-flex; align-items: center; justify-content: center;
    width: 32px; height: 32px; border-radius: 50%;
    background: var(--blue-50); color: var(--blue-700);
    font-weight: 800; font-size: 14px; margin-bottom: 12px;
}
.step h3 { font-size: 15.5px; margin-bottom: 6px; }
.step p { color: var(--ink-3); font-size: 13px; }

/* 页脚 */
.site-footer { background: var(--blue-900); color: rgba(255, 255, 255, 0.72); padding: 48px 0 30px; margin-top: 40px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 32px; }
.site-footer h4 { color: #fff; font-size: 15px; margin-bottom: 12px; }
.site-footer p, .site-footer li { font-size: 13px; line-height: 1.9; }
.site-footer ul { list-style: none; padding: 0; margin: 0; }
.site-footer a { color: rgba(255, 255, 255, 0.72); }
.site-footer a:hover { color: #fff; }
.footer-bottom { border-top: 1px solid rgba(255, 255, 255, 0.12); margin-top: 32px; padding-top: 18px; font-size: 12px; color: rgba(255, 255, 255, 0.5); display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; }

/* 空状态与分页 */
.empty-state { padding: 60px 20px; text-align: center; background: #fff; border: 1px dashed var(--line); border-radius: var(--radius); color: var(--ink-3); }
.pagination-wrap { margin-top: 28px; }
.pagination-wrap svg { width: 18px; height: 18px; }

/* 询价页 */
.inquiry-grid { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 22px; align-items: start; }
.selected-list { display: flex; flex-direction: column; gap: 10px; }
.selected-item { display: flex; justify-content: space-between; gap: 14px; padding: 13px 16px; border: 1px solid var(--line); border-radius: 9px; background: #fff; }
.selected-item b { font-size: 15px; color: var(--blue-900); }
.selected-item span { color: var(--ink-3); font-size: 12.5px; }

.success-box { max-width: 640px; margin: 0 auto; text-align: center; padding: 52px 32px; }
.success-icon { width: 62px; height: 62px; border-radius: 50%; background: #e8f7ef; color: var(--green); display: inline-flex; align-items: center; justify-content: center; font-size: 28px; font-weight: 800; margin-bottom: 18px; }
.success-box h1 { font-size: 26px; }
.success-box p { color: var(--ink-2); margin-top: 12px; }
.success-code { display: inline-block; margin: 22px 0; padding: 10px 22px; border: 1px dashed var(--blue-600); border-radius: 9px; color: var(--blue-800); font-weight: 800; letter-spacing: 1px; background: var(--blue-50); }

/* 提示条 */
.toast-bar { background: var(--blue-50); color: var(--blue-800); font-size: 13.5px; padding: 12px 16px; border-radius: 9px; margin-bottom: 20px; border: 1px solid #d6e8f8; }

/* 响应式 */
@media (max-width: 1024px) {
    .hero h1 { font-size: 34px; }
    .hero-grid { gap: 32px; }
    .category-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .pump-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .result-main { grid-template-columns: 1fr; }
    .result-actions { flex-direction: row; }
    .result-actions .btn { flex: 1; }
}

@media (max-width: 820px) {
    .header-phone { display: none; }
    .site-nav a { padding: 7px 10px; font-size: 14px; }
    .hero-grid { grid-template-columns: 1fr; }
    .hero { padding: 44px 0 52px; }
    .hero-desc { max-width: none; }
    .form-grid { grid-template-columns: 1fr; }
    .detail-grid, .inquiry-grid { grid-template-columns: 1fr; }
    .steps { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .result-metrics { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 640px) {
    .header-inner { flex-wrap: wrap; gap: 10px; padding: 12px 0; }
    .site-nav { order: 3; width: 100%; overflow-x: auto; padding-bottom: 4px; }
    .hero h1 { font-size: 27px; }
    .hero-points { grid-template-columns: 1fr; }
    .hero-point { padding: 10px 14px; }
    .category-grid, .pump-grid { grid-template-columns: 1fr; }
    .section { padding: 44px 0; }
    .container { padding: 0 16px; }
    .result-main { padding: 18px; gap: 16px; }
    .compare-table { font-size: 13px; }
    .steps { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; }
    .hero-actions .btn { width: 100%; }
    .result-actions { flex-direction: column; }
}