@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@300;400;500;600&family=Satisfy&display=swap');

:root {
    --primary: #0277BD; /* 泉水蓝 */
    --secondary: #4DB6AC; /* 矿泉青 */
    --accent: #8BC34A; /* 自然绿 */
    --deep-blue: #013458;
    --bg-water: #E1F5FE;
    --bg-snow: #FAFAFA;
    --bg-ice: #F0FBFF;
    --text-primary: #01579B;
    --text-secondary: #1D425C;
    --text-muted: #5F7B91;
    --border-soft: rgba(2, 119, 189, 0.15);
    --shadow-soft: 0 20px 40px rgba(1, 53, 88, 0.12);
    --shadow-card: 0 24px 50px rgba(2, 119, 189, 0.18);
    --radius-sm: 10px;
    --radius-md: 18px;
    --radius-lg: 32px;
    --spacing-xs: 0.4rem;
    --spacing-sm: 0.8rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2.5rem;
    --spacing-xl: 4rem;
    --spacing-xxl: 6rem;
    --transition-base: all 0.3s ease;

    /* 兼容旧版变量 */
    --color-primary: var(--primary);
    --color-secondary: var(--secondary);
    --color-accent: var(--accent);
    --color-background: #ffffff;
    --color-text-dark: var(--text-secondary);
    --color-text-light: #ffffff;
    --color-link: var(--primary);
    --color-link-hover: var(--accent);
    --font-family-main: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    --font-family-heading: 'Noto Sans SC', sans-serif;
    --font-size-base: 16px;
    --border-radius: var(--radius-md);
    --box-shadow-light: 0 12px 24px rgba(1, 87, 155, 0.12);
    --box-shadow-medium: 0 20px 40px rgba(1, 52, 88, 0.18);
    --transition-speed: var(--transition-base);
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    color: var(--text-secondary);
    background: linear-gradient(180deg, #f6fbff 0%, #ffffff 45%, #f0f8ff 100%);
    line-height: 1.7;
    min-height: 100vh;
}

img,
video {
    max-width: 100%;
    height: auto;
    display: block;
    border-radius: var(--radius-md);
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: var(--transition-base);
}

a:hover {
    color: var(--accent);
}

ul {
    list-style: none;
}

.container {
    width: min(1200px, 92vw);
    margin: 0 auto;
}

.section {
    padding: var(--spacing-xxl) 0;
    position: relative;
}

.section-tight {
    padding: var(--spacing-xl) 0 var(--spacing-lg);
}

.section-light {
    background: var(--bg-water);
}

.section-snow {
    background: var(--bg-snow);
}

.section-wave {
    position: relative;
    background: linear-gradient(180deg, rgba(225, 245, 254, 0.8), #fff);
    overflow: hidden;
}

.section-wave::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 30% 20%, rgba(77, 182, 172, 0.15), transparent 50%),
                radial-gradient(circle at 80% 10%, rgba(139, 195, 74, 0.12), transparent 55%);
    pointer-events: none;
}

.section-title {
    font-size: 2.5rem;
    color: var(--text-primary);
    text-align: center;
    margin: 0 auto var(--spacing-md);
    position: relative;
    display: inline-block;
    padding-bottom: 0.75rem;
    letter-spacing: 0.04em;
}

.section-title::after {
    content: '';
    position: absolute;
    left: 50%;
    bottom: 0;
    transform: translateX(-50%);
    width: 90px;
    height: 4px;
    border-radius: 999px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
}

.section-lead {
    text-align: center;
    max-width: 760px;
    margin: 0 auto var(--spacing-xl);
    color: rgba(29, 66, 92, 0.75);
    font-size: 1.05rem;
}

.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.35rem 1rem;
    border-radius: 999px;
    background: rgba(77, 182, 172, 0.18);
    color: var(--primary);
    font-size: 0.85rem;
    margin: 0 var(--spacing-xs) var(--spacing-xs) 0;
}

.pill {
    display: inline-flex;
    align-items: center;
    padding: 0.3rem 0.9rem;
    border-radius: 999px;
    border: 1px solid var(--border-soft);
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    padding: 0.85rem 1.8rem;
    border-radius: 999px;
    border: none;
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition-base);
}

.btn-spring {
    background: linear-gradient(120deg, var(--primary), #00A8E8);
    color: #fff;
    box-shadow: var(--shadow-soft);
}

.btn-spring:hover {
    transform: translateY(-3px);
}

.btn-spring-outline {
    border: 1px solid rgba(255, 255, 255, 0.6);
    color: #fff;
    background: transparent;
}

.btn-ghost {
    border: 1px solid var(--border-soft);
    color: var(--primary);
    background: rgba(255, 255, 255, 0.8);
}

.grid-2 {
    display: grid;
    gap: var(--spacing-xl);
}

.grid-3 {
    display: grid;
    gap: var(--spacing-lg);
}

/* legacy grid helpers */
.grid {
    display: grid;
    gap: var(--spacing-lg);
}

.grid-2-col {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.grid-3-col {
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.grid-4-col {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

@media (min-width: 768px) {
    .grid-2 {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
    .grid-3 {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
}

.card {
    background: #fff;
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-soft);
    border: 1px solid rgba(2, 119, 189, 0.05);
}

.card-glass {
    backdrop-filter: blur(8px);
    background: rgba(255, 255, 255, 0.7);
}

.main-content {
    padding: var(--spacing-xxl) 0;
}

.hero-spring-source {
    position: relative;
    min-height: 90vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: #fff;
    overflow: hidden;
    margin-bottom: var(--spacing-xl);
}

.volcano-snow-bg {
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(1, 20, 36, 0.8), rgba(2, 55, 86, 0.7)),
                url('../images/source_winter_5.jpg') center/cover no-repeat;
    filter: saturate(110%);
}

.snow-particles,
.water-ripple {
    position: absolute;
    inset: 0;
}

.snow-particles {
    background: radial-gradient(circle, rgba(255, 255, 255, 0.8) 2px, transparent 3px);
    background-size: 120px 120px;
    opacity: 0.4;
    animation: snowfall 16s linear infinite;
}

.water-ripple {
    background: radial-gradient(circle at 50% 50%, rgba(77, 182, 172, 0.25), transparent 55%);
    animation: ripple 12s ease-in-out infinite;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 780px;
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    background: rgba(1, 30, 54, 0.55);
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 35px 70px rgba(1, 20, 36, 0.45);
    backdrop-filter: blur(6px);
}

.water-drop-icon {
    font-size: 3rem;
}

.hero-content h1 {
    font-size: clamp(2.4rem, 5vw, 3.6rem);
    margin: var(--spacing-md) 0;
    font-weight: 600;
}

.hero-content p {
    font-size: 1.25rem;
    opacity: 0.9;
}

.hero-badges {
    margin: var(--spacing-lg) 0;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.5rem;
}

.hero-badges .badge {
    background: rgba(255, 255, 255, 0.15);
    color: #fff;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.cta-row {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-sm);
}

.advantages-water .water-grid {
    display: grid;
    gap: var(--spacing-lg);
}

@media (min-width: 992px) {
    .advantages-water .water-grid {
        grid-template-columns: repeat(4, minmax(0, 1fr));
    }
}

.water-card {
    background: linear-gradient(180deg, rgba(225, 245, 254, 0.9), #fff);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    text-align: center;
    box-shadow: var(--shadow-soft);
    border: 1px solid rgba(2, 119, 189, 0.08);
}

.drop-shape {
    width: 78px;
    height: 96px;
    margin: 0 auto var(--spacing-md);
    background: linear-gradient(180deg, #fff, rgba(225, 245, 254, 0.6));
    border-radius: 50% 50% 50% 50% / 60% 60% 40% 40%;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid rgba(2, 119, 189, 0.2);
    box-shadow: inset 0 10px 20px rgba(2, 119, 189, 0.12);
}

.link-water {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    color: var(--primary);
    font-weight: 600;
    margin-top: var(--spacing-sm);
}

.products-showcase-water .product-carousel {
    display: grid;
    gap: var(--spacing-lg);
}

@media (min-width: 900px) {
    .products-showcase-water .product-carousel {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

.product-item {
    background: #fff;
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(2, 119, 189, 0.08);
    box-shadow: var(--shadow-soft);
    text-align: center;
}

.water-card,
.stat-card,
.product-item,
.news-card {
    transition: transform 0.35s ease, box-shadow 0.35s ease;
}

.water-card:hover,
.stat-card:hover,
.product-item:hover,
.news-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-card);
}

.product-image {
    position: relative;
    margin-bottom: var(--spacing-md);
}

.water-reflection {
    position: absolute;
    inset: auto 0 -20px;
    height: 50px;
    background: radial-gradient(circle, rgba(77, 182, 172, 0.2), transparent 70%);
    filter: blur(10px);
}

.source-explore .source-video {
    position: relative;
    overflow: hidden;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
}

.source-explore .play-button {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: rgba(2, 119, 189, 0.85);
    color: #fff;
    display: grid;
    place-items: center;
    font-size: 1.5rem;
    box-shadow: var(--shadow-soft);
}

.source-info ul,
.feature-list {
    list-style: none;
    margin-top: var(--spacing-md);
    display: grid;
    gap: var(--spacing-sm);
}

.source-info li,
.feature-list li {
    padding-left: 1.5rem;
    position: relative;
}

.source-info li::before,
.feature-list li::before {
    content: '';
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent);
    position: absolute;
    left: 0;
    top: 0.55rem;
}

.water-science .science-data {
    display: grid;
    gap: var(--spacing-lg);
}

@media (min-width: 992px) {
    .water-science .science-data {
        grid-template-columns: 1.2fr 1fr;
    }
}

.ph-scale {
    height: 220px;
    border-radius: var(--radius-lg);
    background: linear-gradient(90deg, #8BC34A, #FFC107, #F44336);
    position: relative;
    overflow: hidden;
}

.ph-marker {
    position: absolute;
    top: 40px;
    transform: translateX(-50%);
    text-align: center;
    color: #fff;
}

.ph-marker::after {
    content: '';
    display: block;
    width: 2px;
    height: 160px;
    margin: 0.5rem auto 0;
    background: rgba(255, 255, 255, 0.8);
}

.mineral-list li {
    display: flex;
    justify-content: space-between;
    padding: 0.8rem 0;
    border-bottom: 1px dashed rgba(1, 87, 155, 0.2);
}

.stat-grid {
    display: grid;
    gap: var(--spacing-lg);
}

@media (min-width: 768px) {
    .stat-grid {
        grid-template-columns: repeat(4, minmax(0, 1fr));
    }
}

.stat-card {
    text-align: center;
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    background: linear-gradient(160deg, rgba(255, 255, 255, 0.98), rgba(225, 245, 254, 0.85));
    border: 1px solid rgba(2, 119, 189, 0.08);
    box-shadow: var(--shadow-soft);
    position: relative;
    overflow: hidden;
}

.stat-card h3 {
    font-size: 2rem;
    color: var(--primary);
    margin-bottom: var(--spacing-xs);
}

.page-hero {
    position: relative;
    padding: 160px 0 120px;
    color: #fff;
    overflow: hidden;
}

.page-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(120deg, rgba(1, 52, 88, 0.95), rgba(2, 119, 189, 0.8));
    mix-blend-mode: multiply;
}

.page-hero .container {
    position: relative;
    z-index: 1;
}

.page-hero h1 {
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: var(--spacing-sm);
}

.page-hero p {
    max-width: 780px;
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: var(--spacing-md);
}

.tab-nav {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-lg);
}

.tab-nav a {
    padding: 0.6rem 1.2rem;
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, 0.5);
    color: #fff;
}

.tab-nav a.active {
    background: #fff;
    color: var(--primary);
}

.info-panel {
    display: grid;
    gap: var(--spacing-xl);
}

.story-block {
    padding: var(--spacing-lg);
    background: #fff;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-soft);
}

.timeline {
    border-left: 2px solid rgba(1, 87, 155, 0.15);
    padding-left: var(--spacing-lg);
}

.timeline-item {
    margin-bottom: var(--spacing-lg);
    position: relative;
}

.timeline-item::before {
    content: '';
    width: 14px;
    height: 14px;
    border-radius: 50%;
    border: 3px solid #fff;
    background: var(--secondary);
    position: absolute;
    left: calc(-1 * var(--spacing-lg) - 7px);
    top: 6px;
}

.award-grid,
.gallery-grid,
.case-grid,
.news-grid,
.job-grid,
.membership-grid,
.contact-grid {
    display: grid;
    gap: var(--spacing-lg);
}

.news-grid {
    align-items: stretch;
}

@media (min-width: 900px) {
    .award-grid,
    .gallery-grid,
    .case-grid,
    .news-grid,
    .job-grid,
    .membership-grid,
    .contact-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (min-width: 900px) {
    .news-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
}

.case-card,
.news-card,
.job-card,
.contact-card {
    background: #fff;
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-soft);
    height: 100%;
}

.news-card img,
.case-card img {
    margin-bottom: var(--spacing-md);
}

.news-section {
    background: linear-gradient(140deg, rgba(225, 245, 254, 0.75), rgba(255, 255, 255, 0.95));
    overflow: hidden;
}

.news-section::before {
    content: '';
    position: absolute;
    top: 12%;
    left: 8%;
    right: 8%;
    height: 70%;
    border-radius: 60px;
    background: radial-gradient(circle at 20% 20%, rgba(2, 119, 189, 0.15), transparent 55%),
                radial-gradient(circle at 80% 35%, rgba(77, 182, 172, 0.18), transparent 60%);
    pointer-events: none;
    z-index: 0;
}

.news-section .container {
    position: relative;
    z-index: 1;
}

.news-card {
    background: linear-gradient(180deg, #fff, rgba(225, 245, 254, 0.6));
    border: 1px solid rgba(2, 119, 189, 0.08);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    position: relative;
    overflow: hidden;
}

.news-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(2, 119, 189, 0.08), transparent 70%);
    opacity: 0;
    transition: opacity 0.35s ease;
}

.news-card:hover::before {
    opacity: 1;
}

.news-card > * {
    position: relative;
    z-index: 1;
}

.news-card img {
    margin-bottom: 0;
    border-radius: var(--radius-md);
}

.news-card h3 {
    margin: 0;
    font-size: 1.2rem;
}

.news-card h3 a {
    color: var(--text-primary);
}

.news-card h3 a:hover {
    color: var(--secondary);
}

.news-card p {
    color: rgba(29, 66, 92, 0.78);
    margin-top: auto;
    margin-bottom: 0;
    flex-grow: 1;
}

.news-meta {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-xs);
}

.process-steps {
    display: grid;
    gap: var(--spacing-lg);
}

@media (min-width: 768px) {
    .process-steps {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
}

.step {
    text-align: center;
    padding: var(--spacing-lg);
    background: #fff;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-soft);
}

.step-number {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: rgba(2, 119, 189, 0.15);
    display: grid;
    place-items: center;
    color: var(--primary);
    font-weight: 600;
    margin: 0 auto var(--spacing-sm);
}

.table {
    width: 100%;
    border-collapse: collapse;
}

.table th,
.table td {
    padding: 0.9rem 1rem;
    border-bottom: 1px solid rgba(2, 119, 189, 0.1);
    text-align: left;
}

.table th {
    color: var(--text-primary);
    font-weight: 600;
    background: rgba(225, 245, 254, 0.6);
}

.cta-panel {
    background: linear-gradient(120deg, #0277BD, #4DB6AC);
    border-radius: var(--radius-lg);
    color: #fff;
    padding: var(--spacing-xl);
    display: grid;
    gap: var(--spacing-lg);
    align-items: center;
    box-shadow: var(--shadow-card);
    position: relative;
    overflow: hidden;
}

.cta-panel::before,
.cta-panel::after {
    content: '';
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.15);
    filter: blur(4px);
}

.cta-panel::before {
    width: 140px;
    height: 140px;
    left: -50px;
    bottom: -50px;
}

.cta-panel::after {
    width: 200px;
    height: 200px;
    right: -80px;
    top: -80px;
}

.cta-panel > * {
    position: relative;
    z-index: 1;
}

@media (min-width: 900px) {
    .cta-panel {
        grid-template-columns: 2fr 1fr;
    }
}

.contact-card {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.contact-form {
    display: grid;
    gap: var(--spacing-md);
}

.contact-form input,
.contact-form textarea,
.contact-form select {
    padding: 0.85rem 1rem;
    border-radius: var(--radius-md);
    border: 1px solid rgba(1, 87, 155, 0.2);
    font-family: inherit;
}

.contact-form textarea {
    min-height: 140px;
    resize: vertical;
}

.accordion {
    border-top: 1px solid rgba(1, 87, 155, 0.15);
}

.accordion-item {
    border-bottom: 1px solid rgba(1, 87, 155, 0.15);
}

.accordion-toggle {
    width: 100%;
    background: none;
    border: none;
    text-align: left;
    padding: var(--spacing-md) 0;
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-primary);
    cursor: pointer;
}

.accordion-content {
    display: none;
    padding-bottom: var(--spacing-md);
    color: var(--text-secondary);
}

.accordion-item.active .accordion-content {
    display: block;
}

.membership-tier {
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(77, 182, 172, 0.3);
}

.badge-green {
    background: rgba(139, 195, 74, 0.18);
    color: var(--accent);
}

.note-box {
    background: rgba(2, 119, 189, 0.08);
    border-left: 4px solid var(--secondary);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
}

@keyframes snowfall {
    from { transform: translateY(-10%); }
    to { transform: translateY(10%); }
}

@keyframes ripple {
    0% { transform: scale(0.95); opacity: 0.6; }
    50% { transform: scale(1.05); opacity: 0.9; }
    100% { transform: scale(0.95); opacity: 0.6; }
}

@media (max-width: 767px) {
    .hero-content {
        padding: var(--spacing-lg);
    }
    .btn {
        width: 100%;
    }
    .tab-nav {
        flex-direction: column;
    }
    .grid-2,
    .grid-3,
    .award-grid,
    .news-grid,
    .case-grid,
    .job-grid,
    .contact-grid {
        grid-template-columns: 1fr;
    }
    .cta-panel {
        grid-template-columns: 1fr;
    }
}