/* ============================================
   智泓科技 - 官网设计系统
   风格对齐「智泓科技·IOT」小程序：深邃暗黑 + 金属质感
   ============================================ */

/* ========== CSS 变量 ========== */
:root {
    /* 品牌色 */
    --primary: #4a80e8;
    --primary-deep: #1e44a0;
    --primary-gradient: linear-gradient(135deg, #4a80e8, #1e44a0);
    --accent: #06e135;            /* 品牌绿：在线/正常 */
    --accent-dim: rgba(6, 225, 53, 0.14);
    --accent-border: rgba(6, 225, 53, 0.28);

    /* 背景与卡片 */
    --bg: #14142a;
    --bg-card: #1a1a30;
    --bg-input: #1e1e34;
    --bg-hover: #20203a;

    /* 文字 */
    --text: #e8ecf5;
    --text-secondary: #9aa3b8;
    --text-muted: #6b7288;

    /* 边框/分隔 */
    --border: #2a2a44;
    --border-light: #34345a;

    /* 金属拉丝纹理 */
    --metal: repeating-linear-gradient(82deg,
            rgba(255, 255, 255, 0.035) 0px,
            rgba(255, 255, 255, 0.035) 1px,
            transparent 1px,
            transparent 4px);
    --metal-highlight: linear-gradient(180deg,
            rgba(255, 255, 255, 0.09) 0%,
            rgba(255, 255, 255, 0) 38%);

    /* 背景氛围：蓝紫光晕 + 细网格 */
    --bg-ambient:
        radial-gradient(720px 340px at 15% -5%, rgba(74, 128, 232, 0.16), transparent 62%),
        radial-gradient(640px 320px at 88% -8%, rgba(161, 91, 237, 0.13), transparent 60%),
        linear-gradient(rgba(255, 255, 255, 0.028) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.028) 1px, transparent 1px),
        #14142a;
    --bg-grid-size: 34px;

    /* 指标专属色 */
    --val-open: #a15bed;          /* 开度紫 */
    --val-water: #0e5eb3;         /* 水位蓝 */
    --val-water-temp: #06e135;    /* 水温绿 */
    --val-ground-temp: #de9e1f;   /* 地温金 */
    --val-air-temp: #e446f5;      /* 气温粉紫 */
    --val-battery: #e14406;       /* 电量橙 */
    --val-warn: #facc15;
    --val-danger: #ef4444;

    /* 阴影 */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 6px 24px rgba(0, 0, 0, 0.38);
    --shadow-lg: 0 14px 48px rgba(0, 0, 0, 0.5);
    --glow: 0 0 24px rgba(74, 128, 232, 0.22);
    --glow-green: 0 0 18px rgba(6, 225, 53, 0.18);

    /* 圆角 */
    --radius-sm: 8px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 16px;

    /* 字体与动画 */
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
        "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica,
        Arial, sans-serif;
    --line-height: 1.7;
    --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
    --duration: 0.35s;

    /* 渐变文字（换肤时整体覆盖） */
    --grad-hero: linear-gradient(100deg, #ffffff 10%, #a9c2f5 55%, #b98ae8);
    --grad-heading: linear-gradient(100deg, #ffffff 20%, #c9d4f5 55%, #a15bed);
    --grad-title: linear-gradient(100deg, #ffffff, #a15bed);
    --grad-logo: linear-gradient(100deg, #ffffff, #8fb0f0);

    /* 导航 / 页脚背景 */
    --nav-bg: rgba(20, 20, 42, 0.82);
    --nav-bg-scrolled: rgba(20, 20, 42, 0.94);
    --footer-bg: linear-gradient(180deg, rgba(20, 20, 42, 0.4), rgba(10, 10, 22, 0.95));
}

/* ========== 重置 ========== */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
}

body {
    font-family: var(--font-family);
    font-size: 16px;
    line-height: var(--line-height);
    color: var(--text);
    background: var(--bg-ambient);
    background-size: auto, auto, var(--bg-grid-size) var(--bg-grid-size), var(--bg-grid-size) var(--bg-grid-size), auto;
    min-height: 100vh;
    overflow-x: hidden;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    color: inherit;
    text-decoration: none;
    transition: color var(--duration) var(--ease-out);
}

ul,
ol {
    list-style: none;
}

button {
    font-family: inherit;
    border: none;
    cursor: pointer;
}

/* ========== 通用 ========== */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: 88px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 56px;
}

.section-header .section-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    letter-spacing: 2px;
    color: var(--accent);
    background: var(--accent-dim);
    border: 1px solid var(--accent-border);
    border-radius: var(--radius-full);
    padding: 5px 16px;
    margin-bottom: 18px;
}

.section-header h2 {
    font-size: 34px;
    font-weight: 700;
    line-height: 1.3;
    background: var(--grad-heading);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.section-header p {
    margin-top: 14px;
    color: var(--text-secondary);
    font-size: 16px;
}

/* 渐变标题（用于卡片内） */
.gradient-title {
    background: var(--grad-title);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* ========== 按钮 ========== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 28px;
    font-size: 15px;
    font-weight: 600;
    border-radius: var(--radius-sm);
    transition: all var(--duration) var(--ease-out);
}

.btn-primary {
    color: #fff;
    background: var(--primary-gradient);
    box-shadow: var(--glow);
    border: 1px solid rgba(74, 128, 232, 0.5);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 32px rgba(74, 128, 232, 0.4);
}

.btn-secondary {
    color: var(--text);
    background: transparent;
    border: 1px solid var(--border-light);
}

.btn-secondary:hover {
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-2px);
}

/* ========== 金属卡片 ========== */
.metal-card {
    position: relative;
    background:
        var(--metal-highlight),
        var(--metal),
        var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    overflow: hidden;
    transition: all var(--duration) var(--ease-out);
}

.metal-card:hover {
    transform: translateY(-4px);
    border-color: rgba(74, 128, 232, 0.45);
    box-shadow: var(--shadow-lg), var(--glow);
}

/* ========== 导航栏 ========== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--nav-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(52, 52, 90, 0.6);
    transition: all var(--duration) var(--ease-out);
}

.navbar.scrolled {
    background: var(--nav-bg-scrolled);
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.45);
}

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 68px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo a {
    display: flex;
    align-items: center;
    gap: 8px;
}

.logo img {
    height: 24px;
    width: auto;
}

.logo-text {
    font-size: 20px;
    font-weight: 700;
    letter-spacing: 1px;
    white-space: nowrap;
    background: var(--grad-logo);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-menu ul {
    display: flex;
    align-items: center;
    gap: 6px;
}

.nav-menu a {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 9px 16px;
    font-size: 15px;
    color: var(--text-secondary);
    border-radius: var(--radius-sm); /* 8px 与按钮圆角统一 */
    transition: all var(--duration) var(--ease-out);
}

.nav-menu a i {
    font-size: 13px;
    opacity: 0.8;
}

.nav-menu a:hover {
    color: var(--text);
    background: var(--bg-hover);
}

.nav-menu a.active {
    color: #fff;
    background: var(--primary-gradient);
    box-shadow: var(--glow);
}

/* 汉堡菜单 */
.menu-toggle {
    display: none;
    background: var(--bg-card);
    border: 1px solid var(--border);
    color: var(--text);
    width: 42px;
    height: 42px;
    border-radius: var(--radius-sm);
    font-size: 17px;
    align-items: center;
    justify-content: center;
}

.nav-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.55);
    z-index: 999;
}

/* ========== 首页 Hero ========== */
.hero {
    position: relative;
    min-height: 92vh;
    display: flex;
    align-items: center;
    padding: 120px 0 80px;
    overflow: hidden;
}

.hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background:
        radial-gradient(620px 300px at 12% 10%, rgba(74, 128, 232, 0.22), transparent 65%),
        radial-gradient(520px 280px at 90% 20%, rgba(161, 91, 237, 0.18), transparent 60%),
        linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
    background-size: auto, auto, var(--bg-grid-size) var(--bg-grid-size), var(--bg-grid-size) var(--bg-grid-size);
    pointer-events: none;
}

.hero::after {
    content: "";
    position: absolute;
    bottom: -180px;
    left: 50%;
    transform: translateX(-50%);
    width: 900px;
    height: 380px;
    background: radial-gradient(ellipse at center, rgba(74, 128, 232, 0.20), transparent 70%);
    filter: blur(12px);
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 640px;
}

.hero-content .hero-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    letter-spacing: 2px;
    color: var(--accent);
    background: var(--accent-dim);
    border: 1px solid var(--accent-border);
    padding: 6px 18px;
    border-radius: var(--radius-full);
    margin-bottom: 26px;
}

.hero-content h2 {
    font-size: 52px;
    font-weight: 800;
    line-height: 1.2;
    background: var(--grad-hero);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-content .hero-sub {
    margin-top: 22px;
    font-size: 18px;
    color: var(--text-secondary);
}

.hero-buttons {
    margin-top: 36px;
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
}

/* Hero 右侧实时数据面板 */
.hero-panel {
    position: relative;
    z-index: 2;
    margin-left: auto;
    width: 380px;
}

.panel-card {
    padding: 24px;
}

.panel-card .panel-title {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 18px;
}

.panel-card .panel-title .live-dot {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    color: var(--accent);
}

.pulse-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent);
    animation: pulse-dot 1.6s ease-in-out infinite;
}

@keyframes pulse-dot {
    0%, 100% { box-shadow: 0 0 0 0 rgba(6, 225, 53, 0.45); }
    50% { box-shadow: 0 0 0 6px rgba(6, 225, 53, 0); }
}

.ov-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
}

.ov-item {
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 14px 10px;
    text-align: center;
}

.ov-item .ov-val {
    font-size: 24px;
    font-weight: 700;
}

.ov-item .ov-label {
    margin-top: 4px;
    font-size: 12px;
    color: var(--text-muted);
}

.ov-item .val-green { color: var(--val-water-temp); }
.ov-item .val-orange { color: var(--val-battery); }
.ov-item .val-blue { color: var(--primary); }

.metrics-row {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
    margin-top: 14px;
}

.metric-chip {
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 10px 8px;
    text-align: center;
}

.metric-chip .m-label {
    font-size: 11px;
    color: var(--text-muted);
}

.metric-chip .m-val {
    margin-top: 3px;
    font-size: 15px;
    font-weight: 600;
}

.m-val.open { color: var(--val-open); }
.m-val.water { color: var(--val-water); }
.m-val.wtemp { color: var(--val-water-temp); }
.m-val.gtemp { color: var(--val-ground-temp); }

/* ========== 首页：产品卡 ========== */
.sol-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 22px;
}

.sol-card {
    padding: 30px 24px;
    text-align: left;
}

.sol-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 23px;
    color: var(--primary);
    background: linear-gradient(135deg, rgba(74, 128, 232, 0.16), rgba(161, 91, 237, 0.16));
    border: 1px solid rgba(74, 128, 232, 0.35);
    border-radius: var(--radius-lg);
    margin-bottom: 18px;
}

.sol-card h4 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 10px;
}

.sol-card p {
    font-size: 14px;
    color: var(--text-secondary);
}

.sol-card .sol-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-top: 16px;
    font-size: 13px;
    color: var(--primary);
}

/* ========== 首页：案例区 ========== */
.case-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 22px;
}

.case-card {
    padding: 28px 26px;
}

.case-card .case-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 14px;
}

.case-card .case-badge {
    font-size: 12px;
    color: var(--accent);
    background: var(--accent-dim);
    border: 1px solid var(--accent-border);
    padding: 3px 12px;
    border-radius: var(--radius-full);
}

.case-card h4 {
    font-size: 19px;
    margin-bottom: 10px;
}

.case-card p {
    font-size: 14px;
    color: var(--text-secondary);
}

.case-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    margin-top: 18px;
    padding-top: 16px;
    border-top: 1px dashed var(--border);
}

.case-stats .cs-item {
    text-align: center;
}

.case-stats .cs-val {
    font-size: 20px;
    font-weight: 700;
}

.case-stats .cs-label {
    margin-top: 2px;
    font-size: 12px;
    color: var(--text-muted);
}

.cs-val.blue { color: var(--val-water); }
.cs-val.green { color: var(--val-water-temp); }
.cs-val.purple { color: var(--val-open); }

/* ========== 首页：流程/能力 ========== */
.flow-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 22px;
}

.flow-card {
    padding: 26px 24px;
    position: relative;
}

.flow-num {
    position: absolute;
    top: 18px;
    right: 22px;
    font-size: 40px;
    font-weight: 800;
    color: transparent;
    -webkit-text-stroke: 1px rgba(74, 128, 232, 0.35);
}

.flow-card .flow-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 19px;
    color: var(--val-open);
    background: rgba(161, 91, 237, 0.12);
    border: 1px solid rgba(161, 91, 237, 0.32);
    border-radius: var(--radius-lg);
    margin-bottom: 16px;
}

.flow-card h4 {
    font-size: 16px;
    margin-bottom: 8px;
}

.flow-card p {
    font-size: 13px;
    color: var(--text-secondary);
}

/* ========== 首页：资讯卡 ========== */
.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 22px;
}

.news-card {
    padding: 26px 24px;
    display: flex;
    flex-direction: column;
}

.news-card .news-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 12px;
    color: var(--text-muted);
    margin-bottom: 14px;
}

.news-card .news-meta .news-cat {
    color: var(--primary);
    background: rgba(74, 128, 232, 0.12);
    border: 1px solid rgba(74, 128, 232, 0.3);
    padding: 2px 10px;
    border-radius: var(--radius-full);
}

.news-card h4 {
    font-size: 17px;
    line-height: 1.5;
    margin-bottom: 10px;
}

.news-card p {
    font-size: 14px;
    color: var(--text-secondary);
    flex: 1;
}

.read-more {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-top: 16px;
    font-size: 13px;
    color: var(--primary);
}

/* ========== CTA 区 ========== */
.cta-section {
    text-align: center;
}

.cta-card {
    padding: 56px 40px;
}

.cta-card h3 {
    font-size: 28px;
    font-weight: 700;
    background: var(--grad-title);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.cta-card p {
    margin: 14px auto 28px;
    max-width: 560px;
    color: var(--text-secondary);
    font-size: 15px;
}

/* ========== 子页 Hero 横幅 ========== */
.hero-banner {
    position: relative;
    padding: 148px 0 72px;
    text-align: center;
    overflow: hidden;
}

.hero-banner::before {
    content: "";
    position: absolute;
    inset: 0;
    background:
        radial-gradient(520px 260px at 20% 0%, rgba(74, 128, 232, 0.20), transparent 65%),
        radial-gradient(460px 240px at 85% 10%, rgba(161, 91, 237, 0.16), transparent 60%),
        linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
    background-size: auto, auto, var(--bg-grid-size) var(--bg-grid-size), var(--bg-grid-size) var(--bg-grid-size);
    pointer-events: none;
}

.hero-banner .hero-content {
    position: relative;
    z-index: 2;
    max-width: 760px;
    margin: 0 auto;
}

.hero-banner h1 {
    font-size: 40px;
    font-weight: 800;
    background: var(--grad-hero);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-banner p {
    margin-top: 14px;
    font-size: 16px;
    color: var(--text-secondary);
}

.crumbs {
    margin-top: 18px;
    font-size: 13px;
    color: var(--text-muted);
}

.crumbs a {
    color: var(--text-secondary);
}

.crumbs a:hover {
    color: var(--primary);
}

/* ========== 产品服务页 ========== */
.prod-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 24px;
}

.prod-card {
    padding: 32px 28px;
    display: flex;
    flex-direction: column;
}

.prod-card .prod-top {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 18px;
}

.prod-icon {
    width: 60px;
    height: 60px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: var(--primary);
    background: linear-gradient(135deg, rgba(74, 128, 232, 0.16), rgba(161, 91, 237, 0.16));
    border: 1px solid rgba(74, 128, 232, 0.35);
    border-radius: var(--radius-xl);
}

.prod-card h3 {
    font-size: 19px;
}

.prod-card .prod-en {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 3px;
    letter-spacing: 1px;
}

.prod-card .prod-desc {
    font-size: 14px;
    color: var(--text-secondary);
    flex: 1;
}

.prod-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 16px 0 20px;
}

.prod-tags span {
    font-size: 12px;
    color: var(--text-secondary);
    background: var(--bg-input);
    border: 1px solid var(--border);
    padding: 4px 12px;
    border-radius: var(--radius-full);
}

.prod-actions {
    display: flex;
    gap: 12px;
}

.prod-actions .btn {
    padding: 10px 22px;
    font-size: 14px;
}

/* 场景区 */
.scene-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 22px;
}

.scene-card {
    padding: 26px 24px;
    text-align: center;
}

.scene-card .scene-icon {
    width: 54px;
    height: 54px;
    margin: 0 auto 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    color: var(--val-water-temp);
    background: var(--accent-dim);
    border: 1px solid var(--accent-border);
    border-radius: var(--radius-lg);
}

.scene-card h4 {
    font-size: 17px;
    margin-bottom: 8px;
}

.scene-card p {
    font-size: 13px;
    color: var(--text-secondary);
}

/* ========== 产品详情页 ========== */
.prod-detail-wrap {
    display: grid;
    grid-template-columns: 5fr 7fr;
    gap: 28px;
    align-items: start;
}

.prod-visual {
    padding: 30px;
    min-height: 340px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.prod-visual .pv-icon {
    width: 120px;
    height: 120px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 50px;
    color: var(--primary);
    background: linear-gradient(135deg, rgba(74, 128, 232, 0.18), rgba(161, 91, 237, 0.18));
    border: 1px solid rgba(74, 128, 232, 0.4);
    border-radius: var(--radius-xl);
    margin-bottom: 24px;
}

.prod-visual h3 {
    font-size: 22px;
}

.prod-visual .pv-tag {
    margin-top: 10px;
    font-size: 13px;
    color: var(--accent);
}

.prod-info h2 {
    font-size: 26px;
    margin-bottom: 14px;
}

.prod-info .prod-desc {
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.spec-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

.spec-table th,
.spec-table td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.spec-table th {
    color: var(--text-muted);
    font-weight: 500;
    width: 130px;
    background: var(--bg-input);
}

.spec-table td {
    color: var(--text-secondary);
}

/* 特性网格 */
.feat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 22px;
}

.feat-card {
    padding: 26px 24px;
}

.feat-card .feat-icon {
    width: 46px;
    height: 46px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    color: var(--val-water);
    background: rgba(14, 94, 179, 0.16);
    border: 1px solid rgba(14, 94, 179, 0.35);
    border-radius: var(--radius-lg);
    margin-bottom: 14px;
}

.feat-card h4 {
    font-size: 16px;
    margin-bottom: 8px;
}

.feat-card p {
    font-size: 13px;
    color: var(--text-secondary);
}

/* 指标展示条 */
.metric-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin: 20px 0;
}

.metric-bar .m-chip {
    flex: 1;
    min-width: 120px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 14px 16px;
    text-align: center;
}

.metric-bar .m-chip .mc-val {
    font-size: 22px;
    font-weight: 700;
}

.metric-bar .m-chip .mc-label {
    margin-top: 4px;
    font-size: 12px;
    color: var(--text-muted);
}

.mc-val.open { color: var(--val-open); }
.mc-val.water { color: var(--val-water); }
.mc-val.wtemp { color: var(--val-water-temp); }
.mc-val.gtemp { color: var(--val-ground-temp); }

/* ========== 资讯页 ========== */
.news-toolbar {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 30px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 8px 22px;
    font-size: 14px;
    color: var(--text-secondary);
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    transition: all var(--duration) var(--ease-out);
}

.filter-btn.active,
.filter-btn:hover {
    color: #fff;
    background: var(--primary-gradient);
    border-color: transparent;
}

.news-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.news-row {
    padding: 26px 28px;
    display: flex;
    gap: 24px;
    align-items: flex-start;
}

.news-row .news-date-block {
    flex-shrink: 0;
    width: 72px;
    text-align: center;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 12px 6px;
}

.news-date-block .d {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary);
}

.news-date-block .m {
    margin-top: 2px;
    font-size: 12px;
    color: var(--text-muted);
}

.news-row .news-body h3 {
    font-size: 18px;
    margin-bottom: 8px;
    transition: color var(--duration);
}

.news-row:hover h3 {
    color: var(--primary);
}

.news-row .news-body p {
    font-size: 14px;
    color: var(--text-secondary);
}

.news-row .news-body .news-cat {
    display: inline-block;
    margin-top: 12px;
    font-size: 12px;
    color: var(--accent);
    background: var(--accent-dim);
    border: 1px solid var(--accent-border);
    padding: 3px 12px;
    border-radius: var(--radius-full);
}

/* ========== 文章页 ========== */
.article-wrap {
    max-width: 820px;
    margin: 0 auto;
}

.article-head {
    text-align: center;
    margin-bottom: 36px;
}

.article-head h1 {
    font-size: 30px;
    line-height: 1.4;
    background: var(--grad-title);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.article-meta {
    margin-top: 16px;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 20px;
    font-size: 13px;
    color: var(--text-muted);
}

.article-body {
    background: var(--metal-highlight), var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: 44px 48px;
    font-size: 16px;
    color: var(--text-secondary);
}

.article-body h2 {
    font-size: 22px;
    color: var(--text);
    margin: 34px 0 16px;
    padding-left: 14px;
    border-left: 3px solid var(--primary);
}

.article-body h3 {
    font-size: 17px;
    color: var(--text);
    margin: 24px 0 12px;
}

.article-body p {
    margin-bottom: 16px;
}

.article-body ul {
    margin: 0 0 16px 4px;
}

.article-body ul li {
    padding-left: 20px;
    position: relative;
    margin-bottom: 8px;
}

.article-body ul li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 11px;
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--primary);
}

.article-body blockquote {
    margin: 20px 0;
    padding: 16px 20px;
    background: var(--bg-input);
    border-left: 3px solid var(--accent);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    color: var(--text);
}

.article-body .data-table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
    font-size: 14px;
}

.article-body .data-table th,
.article-body .data-table td {
    padding: 10px 14px;
    text-align: left;
    border: 1px solid var(--border);
}

.article-body .data-table th {
    background: var(--bg-input);
    color: var(--text);
}

/* 相关文章 */
.rel-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
}

.rel-card {
    padding: 22px 24px;
}

.rel-card h4 {
    font-size: 15px;
    line-height: 1.5;
    margin-bottom: 8px;
}

.rel-card p {
    font-size: 13px;
    color: var(--text-secondary);
}

/* ========== 关于页 ========== */
.about-intro {
    display: grid;
    grid-template-columns: 5fr 7fr;
    gap: 28px;
    align-items: start;
}

.about-aside {
    padding: 30px 26px;
}

.about-aside h3 {
    font-size: 18px;
    margin-bottom: 16px;
}

.about-aside ul li {
    padding: 10px 0;
    font-size: 14px;
    color: var(--text-secondary);
    border-bottom: 1px dashed var(--border);
    display: flex;
    gap: 10px;
    align-items: baseline;
}

.about-aside ul li i {
    color: var(--accent);
    font-size: 12px;
}

.about-main h3 {
    font-size: 20px;
    margin-bottom: 18px;
    background: var(--grad-title);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.about-main p {
    color: var(--text-secondary);
    margin-bottom: 16px;
    font-size: 15px;
}

.about-main p strong {
    color: var(--text);
}

/* 时间线 */
.timeline {
    position: relative;
    max-width: 760px;
    margin: 0 auto;
    padding-left: 30px;
}

.timeline::before {
    content: "";
    position: absolute;
    left: 8px;
    top: 6px;
    bottom: 6px;
    width: 2px;
    background: linear-gradient(180deg, var(--primary), var(--val-open), transparent);
}

.timeline-item {
    position: relative;
    padding: 0 0 34px 26px;
}

.timeline-item:last-child {
    padding-bottom: 0;
}

.timeline-item::before {
    content: "";
    position: absolute;
    left: -26px;
    top: 6px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--primary);
    border: 3px solid var(--bg);
    box-shadow: 0 0 12px rgba(74, 128, 232, 0.5);
}

.timeline-year {
    display: inline-block;
    font-size: 14px;
    font-weight: 700;
    color: var(--accent);
    background: var(--accent-dim);
    border: 1px solid var(--accent-border);
    padding: 3px 14px;
    border-radius: var(--radius-full);
    margin-bottom: 10px;
}

.timeline-content h4 {
    font-size: 17px;
    margin-bottom: 6px;
}

.timeline-content p {
    font-size: 14px;
    color: var(--text-secondary);
}

/* ========== 联系页 ========== */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 22px;
}

.contact-card {
    padding: 28px 26px;
    text-align: center;
}

.contact-card .c-icon {
    width: 54px;
    height: 54px;
    margin: 0 auto 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 21px;
    color: var(--primary);
    background: linear-gradient(135deg, rgba(74, 128, 232, 0.16), rgba(161, 91, 237, 0.16));
    border: 1px solid rgba(74, 128, 232, 0.35);
    border-radius: var(--radius-lg);
}

.contact-card h4 {
    font-size: 15px;
    color: var(--text-muted);
    margin-bottom: 10px;
}

.contact-card p {
    font-size: 15px;
}

.contact-card p.tel {
    font-size: 21px;
    font-weight: 700;
    color: var(--primary);
    letter-spacing: 1px;
}

.map-box {
    border-radius: var(--radius-xl);
    overflow: hidden;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-md);
    height: 420px;
}

.form-card {
    padding: 34px 32px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    font-size: 14px;
    color: var(--text);
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    outline: none;
    transition: border-color var(--duration), box-shadow var(--duration);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(74, 128, 232, 0.15);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.form-group select option {
    background: var(--bg-card);
}

/* FAQ */
.faq-list {
    max-width: 820px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.faq-item {
    padding: 22px 26px;
    cursor: pointer;
}

.faq-item .faq-question {
    font-size: 15px;
    font-weight: 600;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
}

.faq-item .faq-question i {
    font-size: 13px;
    color: var(--text-muted);
    transition: transform var(--duration);
}

.faq-item.open .faq-question i {
    transform: rotate(45deg);
}

.faq-item .faq-answer {
    display: none;
    margin-top: 12px;
    font-size: 14px;
    color: var(--text-secondary);
}

.faq-item.open .faq-answer {
    display: block;
}

/* ========== 页脚 ========== */
.footer {
    margin-top: 40px;
    background: var(--footer-bg);
    border-top: 2px solid transparent;
    border-image: linear-gradient(90deg, var(--primary), var(--val-open), transparent) 1;
}

.footer-content {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 40px;
    padding: 56px 0 40px;
    flex-wrap: wrap;
}

.footer-logo {
    max-width: 360px;
}

.footer-logo img {
    height: 34px;
    margin-bottom: 16px;
}

.footer-logo p {
    font-size: 14px;
    color: var(--text-secondary);
}

.footer-links h4 {
    font-size: 15px;
    margin-bottom: 16px;
}

.footer-links ul li {
    margin-bottom: 10px;
}

.footer-links ul a {
    font-size: 14px;
    color: var(--text-secondary);
}

.footer-links ul a:hover {
    color: var(--primary);
}

.footer-bottom {
    padding: 20px 0;
    border-top: 1px solid var(--border);
    text-align: center;
    font-size: 13px;
    color: var(--text-muted);
}

.footer-bottom .beian {
    margin-top: 6px;
}

.footer-bottom .beian a {
    color: var(--text-muted);
    transition: color var(--duration);
}

.footer-bottom .beian a:hover {
    color: var(--primary);
}

/* ========== 404 / 500 ========== */
.error-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 80px 24px;
}

.error-code {
    font-size: 150px;
    font-weight: 800;
    line-height: 1;
    background: linear-gradient(120deg, var(--primary), var(--val-open), var(--val-air-temp));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    filter: drop-shadow(0 0 30px rgba(74, 128, 232, 0.35));
}

.error-page h2 {
    font-size: 26px;
    margin: 24px 0 12px;
}

.error-page p {
    color: var(--text-secondary);
    margin-bottom: 32px;
}

.error-links {
    display: flex;
    justify-content: center;
    gap: 14px;
    flex-wrap: wrap;
}

.error-links a {
    font-size: 14px;
    color: var(--text-secondary);
    border: 1px solid var(--border);
    padding: 10px 22px;
    border-radius: var(--radius-sm);
    transition: all var(--duration);
}

.error-links a:hover {
    color: #fff;
    background: var(--primary-gradient);
    border-color: transparent;
}

/* ========== 入场动画 ========== */
.reveal {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity 0.6s var(--ease-out), transform 0.6s var(--ease-out);
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ========== 主题切换按钮 ========== */
.nav-theme-li {
    display: flex;
    align-items: center;
    margin-left: 4px;
}

.theme-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    font-family: "Font Awesome 6 Free";
    font-weight: 900;
    font-size: 16px;
    color: var(--text-secondary);
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-full);
    transition: all var(--duration) var(--ease-out);
}

/* 图标由 CSS 伪元素控制，随 html[data-theme] 即时切换，切页不闪烁 */
.theme-toggle::before {
    content: "\f185"; /* fa-sun */
}

html[data-theme="light"] .theme-toggle::before {
    content: "\f186"; /* fa-moon */
}

.theme-toggle:hover {
    color: var(--primary);
    border-color: var(--primary);
    box-shadow: var(--glow);
}

/* ========== 浅色主题（换肤） ========== */
html[data-theme="light"] {
    /* 背景与卡片 */
    --bg: #e9edf5;
    --bg-card: #ffffff;
    --bg-input: #f3f5fa;
    --bg-hover: #eef1f8;

    /* 文字 */
    --text: #232a3d;
    --text-secondary: #5a6276;
    --text-muted: #8a92a6;

    /* 边框 */
    --border: #dde3ee;
    --border-light: #b9c3d6;   /* 描边按钮边框：浅色下加深，保证可见 */

    /* 背景氛围：浅色光晕 + 浅网格 */
    --bg-ambient:
        radial-gradient(720px 340px at 15% -5%, rgba(74, 128, 232, 0.10), transparent 62%),
        radial-gradient(640px 320px at 88% -8%, rgba(161, 91, 237, 0.08), transparent 60%),
        linear-gradient(rgba(30, 40, 70, 0.035) 1px, transparent 1px),
        linear-gradient(90deg, rgba(30, 40, 70, 0.035) 1px, transparent 1px),
        #e9edf5;

    /* 金属纹理浅色下弱化 */
    --metal: repeating-linear-gradient(82deg,
            rgba(0, 0, 0, 0.018) 0px,
            rgba(0, 0, 0, 0.018) 1px,
            transparent 1px,
            transparent 4px);
    --metal-highlight: linear-gradient(180deg, rgba(255, 255, 255, 0.9) 0%, rgba(255, 255, 255, 0) 40%);

    /* 阴影 */
    --shadow-sm: 0 2px 8px rgba(30, 40, 70, 0.06);
    --shadow-md: 0 6px 24px rgba(30, 40, 70, 0.08);
    --shadow-lg: 0 14px 48px rgba(30, 40, 70, 0.12);
    --glow: 0 0 24px rgba(74, 128, 232, 0.14);
    --glow-green: 0 0 18px rgba(6, 225, 53, 0.10);

    /* 渐变文字（浅色下反转） */
    --grad-hero: linear-gradient(100deg, #16305e 10%, #3b6fd4 55%, #7b3fbf);
    --grad-heading: linear-gradient(100deg, #16305e 20%, #3b6fd4 55%, #7b3fbf);
    --grad-title: linear-gradient(100deg, #16305e, #7b3fbf);
    --grad-logo: linear-gradient(100deg, #16305e, #3b6fd4);

    /* 导航 / 页脚 */
    --nav-bg: rgba(255, 255, 255, 0.85);
    --nav-bg-scrolled: rgba(255, 255, 255, 0.96);
    --footer-bg: linear-gradient(180deg, rgba(233, 237, 245, 0.6), rgba(210, 218, 232, 0.95));
}

html[data-theme="light"] .navbar {
    border-bottom-color: rgba(210, 218, 232, 0.9);
}

html[data-theme="light"] .hero::before {
    background:
        radial-gradient(620px 300px at 12% 10%, rgba(74, 128, 232, 0.12), transparent 65%),
        radial-gradient(520px 280px at 90% 20%, rgba(161, 91, 237, 0.10), transparent 60%),
        linear-gradient(rgba(30, 40, 70, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(30, 40, 70, 0.03) 1px, transparent 1px);
    background-size: auto, auto, var(--bg-grid-size) var(--bg-grid-size), var(--bg-grid-size) var(--bg-grid-size);
}

/* ========== 响应式 ========== */
@media (max-width: 1024px) {
    .hero {
        flex-direction: column;
        text-align: center;
    }

    .hero-content {
        max-width: 100%;
    }

    .hero-buttons {
        justify-content: center;
    }

    .hero-panel {
        margin: 48px auto 0;
        width: 100%;
        max-width: 460px;
    }

    .prod-detail-wrap,
    .about-intro {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .section {
        padding: 64px 0;
    }

    .section-header h2 {
        font-size: 27px;
    }

    .hero-content h2 {
        font-size: 36px;
    }

    .hero-banner h1 {
        font-size: 30px;
    }

    .menu-toggle {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: 0;
        right: -280px;
        width: 280px;
        height: 100vh;
        background: var(--bg-card);
        border-left: 1px solid var(--border);
        padding: 80px 24px 24px;
        transition: right var(--duration) var(--ease-out);
        z-index: 1001;
    }

    .nav-menu.open {
        right: 0;
    }

    .nav-menu ul {
        flex-direction: column;
        align-items: stretch;
        gap: 10px;
    }

    .nav-menu a {
        padding: 13px 16px;
    }

    .nav-overlay.show {
        display: block;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .article-body {
        padding: 28px 22px;
    }

    .news-row {
        flex-direction: column;
        gap: 14px;
    }

    .news-date-block {
        display: flex;
        align-items: center;
        gap: 10px;
        width: auto;
        text-align: left;
    }

    .news-date-block .d {
        font-size: 18px;
    }

    .footer-content {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    .hero-content h2 {
        font-size: 30px;
    }

    .error-code {
        font-size: 100px;
    }
}