:root {
    --lake-teal: #5C9CA6;
    --lake-teal-dark: #3A6F78;
    --lake-teal-deeper: #2A555C;
    --lake-teal-light: #A8D5DB;
    --lake-teal-pale: #D4ECF0;
    --lake-teal-bg: #E8F4F6;
    --lake-teal-surface: #F3F9FA;
    --warm-accent: #F0A868;
    --warm-accent-hover: #E8954D;
    --text-dark: #1C2B2D;
    --text-medium: #3D5255;
    --text-light: #5C7073;
    --white: #FFFFFF;
    --shadow-sm: 0 1px 3px rgba(42, 85, 92, 0.06), 0 1px 2px rgba(42, 85, 92, 0.04);
    --shadow-md: 0 4px 16px rgba(42, 85, 92, 0.08), 0 2px 6px rgba(42, 85, 92, 0.04);
    --shadow-lg: 0 12px 32px rgba(42, 85, 92, 0.10), 0 4px 12px rgba(42, 85, 92, 0.05);
    --shadow-xl: 0 20px 48px rgba(42, 85, 92, 0.12), 0 8px 20px rgba(42, 85, 92, 0.06);
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-smooth: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: 0.45s cubic-bezier(0.34, 1.56, 0.64, 1);
    --font-heading: 'PingFang SC', 'Noto Sans SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
    --font-body: 'PingFang SC', 'Noto Sans SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
    --max-width: 1280px;
    --header-height: 72px;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-body);
    color: var(--text-dark);
    background-color: var(--white);
    line-height: 1.7;
    overflow-x: hidden;
    min-height: 100vh;
}

/* ============ HEADER / NAV ============ */
.header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(92, 156, 166, 0.12);
    transition: all var(--transition-smooth);
    height: var(--header-height);
    display: flex;
    align-items: center;
}

.header.scrolled {
    box-shadow: var(--shadow-md);
    background: rgba(255, 255, 255, 0.97);
}

.header-inner {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 28px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}

.logo-area {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
    text-decoration: none;
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--lake-teal), var(--lake-teal-dark));
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-weight: 700;
    font-size: 18px;
    letter-spacing: 1px;
    flex-shrink: 0;
    box-shadow: 0 3px 10px rgba(58, 111, 120, 0.25);
}

.logo-text {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--lake-teal-deeper);
    letter-spacing: 0.02em;
    white-space: nowrap;
    line-height: 1.3;
}

.logo-text .logo-brand {
    display: block;
    font-size: 1.05rem;
}

.logo-text .logo-sub {
    display: block;
    font-size: 0.78rem;
    font-weight: 500;
    color: var(--lake-teal);
    letter-spacing: 0.04em;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 6px;
    list-style: none;
}

.nav-links li a {
    display: inline-block;
    padding: 10px 18px;
    text-decoration: none;
    color: var(--text-medium);
    font-weight: 500;
    font-size: 0.95rem;
    border-radius: 30px;
    transition: all var(--transition-fast);
    position: relative;
    letter-spacing: 0.02em;
    white-space: nowrap;
}

.nav-links li a:hover,
.nav-links li a.active {
    color: var(--lake-teal-dark);
    background: var(--lake-teal-bg);
}

.header-phone {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--lake-teal-deeper);
    font-weight: 700;
    font-size: 1.05rem;
    text-decoration: none;
    white-space: nowrap;
    letter-spacing: 0.03em;
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

.header-phone:hover {
    color: var(--lake-teal);
}

.header-phone .phone-icon {
    width: 36px;
    height: 36px;
    background: var(--lake-teal);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: all var(--transition-smooth);
}

.header-phone:hover .phone-icon {
    background: var(--lake-teal-dark);
    transform: scale(1.08);
}

.phone-icon svg {
    width: 17px;
    height: 17px;
    fill: #fff;
}

/* 汉堡菜单 */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    background: none;
    border: none;
    padding: 8px;
    z-index: 1001;
}

.hamburger span {
    display: block;
    width: 26px;
    height: 2.5px;
    background: var(--lake-teal-deeper);
    border-radius: 2px;
    transition: all var(--transition-fast);
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}
.hamburger.active span:nth-child(2) {
    opacity: 0;
}
.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ============ BANNER ============ */
.banner {
    position: relative;
    background: linear-gradient(160deg, #2A555C 0%, #3A6F78 25%, #5C9CA6 55%, #7DBDC7 80%, #A8D5DB 100%);
    min-height: 520px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    overflow: hidden;
    padding: 60px 28px;
}

.banner::before {
    content: '';
    position: absolute;
    top: -20%;
    right: -10%;
    width: 500px;
    height: 500px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.04);
    animation: floatBubble 12s ease-in-out infinite;
    pointer-events: none;
}

.banner::after {
    content: '';
    position: absolute;
    bottom: -15%;
    left: -8%;
    width: 380px;
    height: 380px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.03);
    animation: floatBubble 15s ease-in-out infinite reverse;
    pointer-events: none;
}

@keyframes floatBubble {
    0%,
    100% {
        transform: translate(0, 0) scale(1);
    }
    25% {
        transform: translate(30px, -25px) scale(1.06);
    }
    50% {
        transform: translate(-15px, -40px) scale(1.03);
    }
    75% {
        transform: translate(-25px, 10px) scale(1.07);
    }
}

.banner-particles {
    position: absolute;
    inset: 0;
    pointer-events: none;
    overflow: hidden;
}

.banner-particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: rgba(255, 255, 255, 0.5);
    border-radius: 50%;
    animation: particleDrift 7s ease-in-out infinite;
}

.banner-particle:nth-child(1) {
    top: 15%;
    left: 10%;
    animation-delay: 0s;
}
.banner-particle:nth-child(2) {
    top: 25%;
    right: 15%;
    animation-delay: 1.5s;
    width: 3px;
    height: 3px;
}
.banner-particle:nth-child(3) {
    bottom: 30%;
    left: 20%;
    animation-delay: 3s;
    width: 5px;
    height: 5px;
}
.banner-particle:nth-child(4) {
    top: 40%;
    right: 25%;
    animation-delay: 4.5s;
    width: 3px;
    height: 3px;
}
.banner-particle:nth-child(5) {
    bottom: 20%;
    right: 10%;
    animation-delay: 2s;
    width: 4px;
    height: 4px;
}
.banner-particle:nth-child(6) {
    top: 55%;
    left: 30%;
    animation-delay: 5s;
    width: 3px;
    height: 3px;
}

@keyframes particleDrift {
    0%,
    100% {
        transform: translateY(0) translateX(0);
        opacity: 0.5;
    }
    25% {
        transform: translateY(-40px) translateX(15px);
        opacity: 1;
    }
    50% {
        transform: translateY(-20px) translateX(-10px);
        opacity: 0.6;
    }
    75% {
        transform: translateY(-50px) translateX(8px);
        opacity: 0.9;
    }
}

.banner-content {
    position: relative;
    z-index: 2;
    max-width: 720px;
}

.banner-subtitle {
    display: inline-block;
    font-size: 0.9rem;
    letter-spacing: 0.1em;
    color: rgba(255, 255, 255, 0.85);
    text-transform: uppercase;
    margin-bottom: 16px;
    animation: fadeInUp 0.8s ease forwards;
    animation-delay: 0.15s;
    opacity: 0;
}

.banner-title {
    font-family: var(--font-heading);
    font-size: 2.8rem;
    font-weight: 700;
    color: #fff;
    letter-spacing: 0.03em;
    line-height: 1.3;
    margin-bottom: 10px;
    animation: fadeInUp 0.8s ease forwards;
    animation-delay: 0.3s;
    opacity: 0;
}

.banner-desc {
    font-size: 1.15rem;
    color: rgba(255, 255, 255, 0.9);
    letter-spacing: 0.04em;
    margin-bottom: 28px;
    animation: fadeInUp 0.8s ease forwards;
    animation-delay: 0.45s;
    opacity: 0;
}

.banner-phone-badge {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: rgba(255, 255, 255, 0.18);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    padding: 14px 28px;
    border-radius: 50px;
    color: #fff;
    font-weight: 700;
    font-size: 1.3rem;
    letter-spacing: 0.05em;
    text-decoration: none;
    animation: fadeInUp 0.8s ease forwards;
    animation-delay: 0.6s;
    opacity: 0;
    transition: all var(--transition-smooth);
}

.banner-phone-badge:hover {
    background: rgba(255, 255, 255, 0.28);
    transform: translateY(-3px);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.18);
}

.banner-phone-badge .bp-icon {
    width: 22px;
    height: 22px;
    fill: #fff;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(28px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 波浪装饰 */
.banner-wave {
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 100%;
    z-index: 1;
    pointer-events: none;
}

.banner-wave svg {
    display: block;
    width: 100%;
    height: auto;
}

/* ============ SECTION COMMON ============ */
.section {
    padding: 80px 28px;
}

.section-inner {
    max-width: var(--max-width);
    margin: 0 auto;
}

.section-label {
    display: inline-block;
    font-size: 0.82rem;
    letter-spacing: 0.08em;
    color: var(--lake-teal);
    font-weight: 600;
    text-transform: uppercase;
    margin-bottom: 8px;
}

.section-title {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 700;
    color: var(--lake-teal-deeper);
    letter-spacing: 0.03em;
    margin-bottom: 16px;
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 50px;
    height: 3px;
    background: var(--lake-teal);
    border-radius: 2px;
    margin-top: 10px;
}

.section-subtitle {
    color: var(--text-light);
    font-size: 1rem;
    letter-spacing: 0.02em;
    margin-bottom: 40px;
    max-width: 600px;
}

/* ============ ABOUT SECTION ============ */
.about-section {
    background: var(--lake-teal-surface);
    position: relative;
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.about-text {
    color: var(--text-medium);
    font-size: 0.98rem;
    line-height: 1.9;
}

.about-text p {
    line-height: 1.9;
    margin-bottom: 16px;
}

.about-text .highlight-phone {
    display: inline-block;
    color: var(--lake-teal-dark);
    font-weight: 700;
    font-size: 1.1rem;
    letter-spacing: 0.04em;
    background: var(--lake-teal-bg);
    padding: 6px 16px;
    border-radius: 20px;
    margin: 4px 2px;
    transition: all var(--transition-fast);
}

.about-image-wrapper {
    display: flex;
    justify-content: center;
    align-items: center;
}

.about-image-wrapper img {
    width: 100%;
    max-width: 600px;
    height: auto;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    transition: all var(--transition-smooth);
}

.about-image-wrapper img:hover {
    transform: translateY(-6px);
    box-shadow: 0 24px 56px rgba(42, 85, 92, 0.16), 0 10px 24px rgba(42, 85, 92, 0.08);
}

/* ============ PRODUCTS SECTION ============ */
.products-section {
    background: var(--white);
}

.product-series {
    margin-bottom: 56px;
}

.product-series:last-child {
    margin-bottom: 0;
}

.product-series-title {
    font-family: var(--font-heading);
    font-size: 1.55rem;
    font-weight: 700;
    color: var(--lake-teal-deeper);
    letter-spacing: 0.03em;
    margin-bottom: 28px;
    padding-left: 16px;
    border-left: 4px solid var(--lake-teal);
    display: flex;
    align-items: center;
    gap: 4px;
}

.product-series-title .series-tag {
    color: var(--lake-teal);
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.product-card {
    background: var(--white);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-bounce);
    cursor: pointer;
    position: relative;
    border: 1px solid rgba(92, 156, 166, 0.08);
}

.product-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: rgba(92, 156, 166, 0.2);
}

.product-card-img {
    width: 100%;
    aspect-ratio: 1 / 1;
    object-fit: cover;
    display: block;
    transition: transform 0.5s ease;
}

.product-card:hover .product-card-img {
    transform: scale(1.06);
}

.product-card-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(42, 85, 92, 0.75));
    padding: 24px 16px 12px;
    opacity: 0;
    transition: opacity var(--transition-smooth);
    pointer-events: none;
}

.product-card:hover .product-card-overlay {
    opacity: 1;
}

.product-card-overlay span {
    color: #fff;
    font-weight: 600;
    font-size: 0.9rem;
    letter-spacing: 0.03em;
}

/* ============ CONTACT STRIP ============ */
.contact-strip {
    background: linear-gradient(135deg, var(--lake-teal-dark), var(--lake-teal-deeper));
    padding: 48px 28px;
    text-align: center;
    color: #fff;
    position: relative;
    overflow: hidden;
}

.contact-strip::before {
    content: '';
    position: absolute;
    top: -40px;
    right: -40px;
    width: 200px;
    height: 200px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.04);
    pointer-events: none;
}

.contact-strip-inner {
    max-width: 600px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.contact-strip h3 {
    font-size: 1.6rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    margin-bottom: 8px;
}

.contact-strip .cs-phone {
    display: inline-block;
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    color: #fff;
    text-decoration: none;
    padding: 12px 32px;
    border: 2px solid rgba(255, 255, 255, 0.5);
    border-radius: 50px;
    transition: all var(--transition-smooth);
    margin-top: 12px;
}

.contact-strip .cs-phone:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: #fff;
    transform: scale(1.04);
}

/* ============ FRIEND LINKS ============ */
.links-section {
    background: var(--lake-teal-surface);
    padding: 48px 28px;
}

.links-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    text-align: center;
}

.links-title {
    font-size: 0.9rem;
    letter-spacing: 0.06em;
    color: var(--text-light);
    margin-bottom: 20px;
    font-weight: 600;
}

.friend-links,
.all-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
    margin-bottom: 12px;
}

.friend-links a,
.all-links a {
    display: inline-block;
    padding: 8px 18px;
    background: var(--white);
    color: var(--text-medium);
    text-decoration: none;
    border-radius: 24px;
    font-size: 0.88rem;
    letter-spacing: 0.02em;
    transition: all var(--transition-fast);
    border: 1px solid rgba(92, 156, 166, 0.12);
    white-space: nowrap;
}

.friend-links a:hover,
.all-links a:hover {
    color: var(--lake-teal-dark);
    border-color: var(--lake-teal);
    background: var(--lake-teal-bg);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.all-links {
    margin-bottom: 0;
}

.data-empty{
    padding:42px;
    border:1px dashed #d5e1ee;
    border-radius:14px;
    text-align:center;
    color:var(--geo-muted);
    background:#fff
}

/* ============ FOOTER ============ */
.footer {
    background: var(--lake-teal-deeper);
    color: rgba(255, 255, 255, 0.8);
    text-align: center;
    padding: 32px 28px;
    font-size: 0.88rem;
    letter-spacing: 0.03em;
}

.footer strong {
    color: #fff;
    font-weight: 600;
}

/* ============ MOBILE CALL BUTTON ============ */
.mobile-call-btn {
    display: none;
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 999;
    width: 58px;
    height: 58px;
    background: var(--warm-accent);
    border-radius: 50%;
    box-shadow: 0 8px 28px rgba(240, 168, 104, 0.45);
    align-items: center;
    justify-content: center;
    text-decoration: none;
    transition: all var(--transition-bounce);
    animation: pulseCall 2.4s ease-in-out infinite;
}

.mobile-call-btn:hover {
    background: var(--warm-accent-hover);
    transform: scale(1.1);
    box-shadow: 0 12px 36px rgba(240, 168, 104, 0.55);
}

.mobile-call-btn svg {
    width: 26px;
    height: 26px;
    fill: #fff;
}

@keyframes pulseCall {
    0%,
    100% {
        box-shadow: 0 8px 28px rgba(240, 168, 104, 0.45);
    }
    50% {
        box-shadow: 0 8px 40px rgba(240, 168, 104, 0.7), 0 0 0 16px rgba(240, 168, 104, 0.12);
    }
}

/* ============ SCROLL REVEAL ============ */
.reveal {
    opacity: 0;
    transform: translateY(36px);
    transition: opacity 0.7s ease, transform 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

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

.reveal-delay-1 {
    transition-delay: 0.1s;
}
.reveal-delay-2 {
    transition-delay: 0.2s;
}
.reveal-delay-3 {
    transition-delay: 0.3s;
}
.reveal-delay-4 {
    transition-delay: 0.4s;
}
.reveal-delay-5 {
    transition-delay: 0.5s;
}

/* ============ RESPONSIVE ============ */
@media (max-width: 1024px) {
    .product-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 16px;
    }
    .about-grid {
        gap: 36px;
    }
    .banner-title {
        font-size: 2.2rem;
    }
    .section-title {
        font-size: 1.7rem;
    }
}

@media (max-width: 768px) {
    .header {
        height: 60px;
    }
    .header-inner {
        padding: 0 16px;
        gap: 12px;
    }
    .logo-text {
        font-size: 0.9rem;
    }
    .logo-text .logo-brand {
        font-size: 0.88rem;
    }
    .logo-text .logo-sub {
        font-size: 0.68rem;
    }
    .logo-icon {
        width: 32px;
        height: 32px;
        font-size: 15px;
    }
    .header-phone {
        font-size: 0.85rem;
    }
    .header-phone .phone-icon {
        width: 28px;
        height: 28px;
    }
    .phone-icon svg {
        width: 14px;
        height: 14px;
    }
    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 260px;
        height: 100vh;
        background: #fff;
        flex-direction: column;
        padding: 80px 24px 40px;
        gap: 4px;
        box-shadow: var(--shadow-xl);
        transition: right var(--transition-smooth);
        z-index: 999;
    }
    .nav-links.open {
        right: 0;
    }
    .nav-links li a {
        display: block;
        padding: 14px 18px;
        border-radius: var(--radius-sm);
        font-size: 1rem;
        text-align: center;
    }
    .hamburger {
        display: flex;
    }
    .header-phone span {
        display: none;
    }
    .banner {
        min-height: 400px;
        padding: 40px 20px;
    }
    .banner-title {
        font-size: 1.7rem;
    }
    .banner-desc {
        font-size: 0.95rem;
    }
    .banner-phone-badge {
        font-size: 1.05rem;
        padding: 10px 20px;
    }
    .about-grid {
        grid-template-columns: 1fr;
        gap: 28px;
    }
    .about-image-wrapper img {
        max-width: 100%;
    }
    .product-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }
    .section {
        padding: 56px 16px;
    }
    .section-title {
        font-size: 1.45rem;
    }
    .product-series-title {
        font-size: 1.25rem;
    }
    .mobile-call-btn {
        display: flex;
    }
    .contact-strip .cs-phone {
        font-size: 1.4rem;
        padding: 10px 22px;
    }
    .banner-wave {
        bottom: -1px;
    }
    .friend-links,
    .all-links {
        gap: 8px;
    }
    .friend-links a,
    .all-links a {
        padding: 6px 14px;
        font-size: 0.8rem;
    }
}

@media (max-width: 480px) {
    .banner-title {
        font-size: 1.4rem;
    }
    .banner-desc {
        font-size: 0.85rem;
    }
    .banner-phone-badge {
        font-size: 0.95rem;
        padding: 8px 16px;
    }
    .product-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
    }
    .section-title {
        font-size: 1.3rem;
    }
    .product-series-title {
        font-size: 1.1rem;
    }
    .about-text {
        font-size: 0.9rem;
    }
    .section {
        padding: 40px 12px;
    }
    .contact-strip {
        padding: 36px 16px;
    }
    .contact-strip h3 {
        font-size: 1.3rem;
    }
    .contact-strip .cs-phone {
        font-size: 1.2rem;
    }
    .footer {
        padding: 24px 16px;
        font-size: 0.78rem;
    }
}