/* ============================================
   I3C Lab Website - Modern Single Page Design
   Color Palette:
   - SYSU Green: #00573F (dark), #006B3F (primary), #E8F5E9 (light)
   - i3C Blue:   #1565C0 (accent), #E3F2FD (light)
   - Hero Dark:  #0D1B2A, #1B2838
   - Neutral:    #F8F9FA, #FFFFFF, #333, #666
   ============================================ */

:root {
    --green-dark: #00573F;
    --green-primary: #006B3F;
    --green-light: #E8F5E9;
    --green-50: #f0faf5;
    --blue-accent: #1565C0;
    --blue-light: #E3F2FD;
    --hero-dark: #0D1B2A;
    --hero-mid: #1B2838;
    --text-primary: #1a1a1a;
    --text-secondary: #555;
    --text-muted: #888;
    --bg-white: #FFFFFF;
    --bg-light: #F7F9FB;
    --bg-alt: #F0F4F3;
    --border-light: #e0e6e3;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.10);
    --shadow-lg: 0 8px 32px rgba(0,0,0,0.12);
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --font-main: 'Noto Sans SC', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

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

html { scroll-behavior: smooth; scroll-padding-top: 70px; zoom: 1.25; }

body {
    font-family: var(--font-main);
    color: var(--text-primary);
    background: var(--bg-white);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}

.hidden { display: none !important; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ---- NAVBAR ---- */
#navbar {
    position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
    background: rgba(255,255,255,0.0);
    backdrop-filter: blur(0px);
    transition: var(--transition);
    border-bottom: 1px solid transparent;
}
#navbar.scrolled {
    background: rgba(255,255,255,0.96);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-light);
    box-shadow: var(--shadow-sm);
}
.nav-container {
    max-width: 1200px; margin: 0 auto; padding: 0 24px;
    display: flex; align-items: center; justify-content: space-between;
    height: 64px;
}
.nav-logo {
    display: flex; align-items: center; gap: 10px;
    text-decoration: none; color: #fff;
    transition: var(--transition);
}
#navbar.scrolled .nav-logo { color: var(--green-dark); }
.nav-logo img { height: 36px; width: auto; }
.nav-logo-sysu { height: 36px !important; }
.logo-text { font-weight: 700; font-size: 1.15rem; letter-spacing: 0.5px; }
.nav-links {
    display: flex; list-style: none; gap: 4px; align-items: center;
}
.nav-links a {
    text-decoration: none; color: rgba(255,255,255,0.85);
    font-size: 0.9rem; font-weight: 500;
    padding: 6px 14px; border-radius: var(--radius-sm);
    transition: var(--transition); white-space: nowrap;
}
.nav-links a:hover, .nav-links a.active {
    color: #fff; background: rgba(255,255,255,0.15);
}
#navbar.scrolled .nav-links a {
    color: var(--text-secondary);
}
#navbar.scrolled .nav-links a:hover,
#navbar.scrolled .nav-links a.active {
    color: var(--green-primary); background: var(--green-light);
}
.nav-right { display: flex; align-items: center; gap: 10px; }
.hamburger { display: none; }
.lang-btn {
    background: rgba(255,255,255,0.15); color: #fff;
    border: 1px solid rgba(255,255,255,0.3);
    padding: 4px 12px; border-radius: var(--radius-sm);
    font-size: 0.8rem; font-weight: 600; cursor: pointer;
    transition: var(--transition);
}
#navbar.scrolled .lang-btn {
    background: var(--green-light); color: var(--green-primary);
    border-color: var(--green-primary);
}

/* ---- HERO SECTION ---- */
#hero {
    position: relative; min-height: 100vh;
    display: flex; align-items: center; justify-content: center;
    overflow: hidden; text-align: center;
}
.hero-bg-slides {
    position: absolute; inset: 0; z-index: 0;
}
.hero-bg {
    position: absolute; inset: 0;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    opacity: 0;
    transition: opacity 1.8s ease-in-out;
    will-change: opacity;
}
.hero-bg.active { opacity: 1; }
.hero-overlay {
    position: absolute; inset: 0; z-index: 1;
    background: linear-gradient(135deg, rgba(0,87,63,0.88) 0%, rgba(13,27,42,0.92) 50%, rgba(21,101,192,0.80) 100%);
}
.hero-content {
    position: relative; z-index: 2; color: #fff;
    padding: 20px; max-width: 800px;
}
.hero-badge {
    margin-bottom: 24px;
    display: flex; align-items: center; justify-content: center; gap: 24px;
}
.hero-logo {
    width: 100px; height: 100px; object-fit: contain;
    filter: drop-shadow(0 4px 20px rgba(0,0,0,0.3));
    animation: float 3s ease-in-out infinite;
}
.hero-logo-sysu {
    width: 100px; height: 100px;
}
@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}
.hero-title {
    font-size: clamp(1.8rem, 4vw, 2.8rem);
    font-weight: 700; margin-bottom: 12px;
    letter-spacing: 2px; line-height: 1.3;
}
.hero-subtitle {
    font-size: clamp(0.95rem, 2vw, 1.2rem);
    font-weight: 300; opacity: 0.9; margin-bottom: 28px;
    letter-spacing: 1px;
}
.hero-keywords {
    display: flex; flex-wrap: wrap; justify-content: center;
    gap: 8px; align-items: center;
    font-size: 0.95rem; opacity: 0.85; margin-bottom: 40px;
}
.kw { padding: 4px 16px; background: rgba(255,255,255,0.12); border-radius: 20px; }
.kw-sep { opacity: 0.4; }
.hero-scroll-btn {
    display: inline-flex; align-items: center; justify-content: center;
    width: 44px; height: 44px; border-radius: 50%;
    border: 2px solid rgba(255,255,255,0.4);
    color: #fff; text-decoration: none;
    animation: bounce 2s infinite; transition: var(--transition);
}
.hero-scroll-btn:hover { background: rgba(255,255,255,0.15); border-color: #fff; }
@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
    40% { transform: translateY(-8px); }
    60% { transform: translateY(-4px); }
}

/* ---- SECTIONS ---- */
.section { padding: 80px 0; }
.section-alt { background: var(--bg-alt); }
.section-highlight {
    background: linear-gradient(135deg, var(--green-dark) 0%, var(--hero-mid) 100%);
    color: #fff;
}

/* ---- JOIN US BG IMAGE ---- */
.joinus-bg-section { padding: 80px 0; }
.section-title {
    text-align: center; font-size: 1.8rem; font-weight: 700;
    margin-bottom: 48px; position: relative; color: var(--text-primary);
}
.section-title span {
    position: relative; display: inline-block;
    padding-bottom: 12px;
}
.section-title span::after {
    content: ''; position: absolute; bottom: 0;
    left: 50%; transform: translateX(-50%);
    width: 50px; height: 3px;
    background: linear-gradient(90deg, var(--green-primary), var(--blue-accent));
    border-radius: 2px;
}
.section-title.light { color: #fff; }
.section-title.light span::after {
    background: linear-gradient(90deg, #66BB6A, #42A5F5);
}

/* ---- ABOUT SECTION ---- */
.about-grid {
    display: grid; grid-template-columns: 280px 1fr;
    gap: 48px; align-items: start;
}
.about-photo {
    text-align: center; position: sticky; top: 90px;
}
.about-photo img {
    width: 220px; height: 280px; object-fit: cover;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    border: 4px solid #fff;
}
.about-name { margin-top: 16px; }
.about-name h3 { font-size: 1.4rem; font-weight: 700; color: var(--green-dark); }
.about-name p { font-size: 0.9rem; color: var(--text-secondary); margin-top: 4px; }
.about-links {
    margin-top: 12px; display: flex; gap: 12px; justify-content: center;
}
.about-links a {
    display: flex; align-items: center; justify-content: center;
    width: 40px; height: 40px; border-radius: 50%;
    background: var(--green-light); color: var(--green-primary);
    text-decoration: none; transition: var(--transition);
    font-size: 1.1rem;
}
.about-links a:hover {
    background: var(--green-primary); color: #fff;
    transform: translateY(-2px); box-shadow: var(--shadow-md);
}
.about-bio {
    font-size: 0.95rem; line-height: 1.9; color: var(--text-secondary);
    margin-bottom: 32px;
}
.about-bio p { margin-bottom: 12px; }
.about-highlights {
    display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
}
.highlight-card {
    background: var(--bg-white); border-radius: var(--radius-md);
    padding: 20px; border: 1px solid var(--border-light);
    transition: var(--transition); text-align: center;
}
.highlight-card:hover {
    transform: translateY(-3px); box-shadow: var(--shadow-md);
    border-color: var(--green-primary);
}
.highlight-card .num {
    font-size: 2rem; font-weight: 700;
    background: linear-gradient(135deg, var(--green-primary), var(--blue-accent));
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    background-clip: text;
}
.highlight-card .label {
    font-size: 0.85rem; color: var(--text-muted); margin-top: 4px;
}

/* ---- RESEARCH SECTION ---- */
.research-grid {
    display: grid; grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}
.research-card {
    background: var(--bg-white); border-radius: var(--radius-md);
    padding: 32px 28px; border: 1px solid var(--border-light);
    transition: var(--transition); position: relative; overflow: hidden;
}
.research-card::before {
    content: ''; position: absolute; top: 0; left: 0;
    width: 4px; height: 100%;
    background: linear-gradient(180deg, var(--green-primary), var(--blue-accent));
    opacity: 0; transition: var(--transition);
}
.research-card:hover {
    transform: translateY(-4px); box-shadow: var(--shadow-lg);
}
.research-card:hover::before { opacity: 1; }
.research-card .card-icon {
    font-size: 2.2rem; margin-bottom: 16px;
    background: linear-gradient(135deg, var(--green-primary), var(--blue-accent));
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    background-clip: text;
}
.research-card h3 { font-size: 1.15rem; font-weight: 600; margin-bottom: 10px; color: var(--text-primary); }
.research-card p { font-size: 0.9rem; color: var(--text-secondary); line-height: 1.7; }
.research-card .tags { margin-top: 14px; display: flex; flex-wrap: wrap; gap: 6px; }
.research-card .tag {
    font-size: 0.75rem; padding: 2px 10px; border-radius: 12px;
    background: var(--green-light); color: var(--green-dark);
}

/* ---- PROJECTS / TIMELINE ---- */
.timeline { position: relative; max-width: 900px; margin: 0 auto; }
.timeline::before {
    content: ''; position: absolute; left: 20px; top: 0; bottom: 0;
    width: 2px; background: linear-gradient(180deg, var(--green-primary), var(--blue-accent));
}
.timeline-item {
    position: relative; padding-left: 56px; margin-bottom: 32px;
}
.timeline-item::before {
    content: ''; position: absolute; left: 13px; top: 6px;
    width: 16px; height: 16px; border-radius: 50%;
    background: var(--bg-white); border: 3px solid var(--green-primary);
    z-index: 1;
}
.timeline-item .year {
    font-size: 0.8rem; font-weight: 600; color: var(--green-primary);
    margin-bottom: 6px; letter-spacing: 0.5px;
}
.timeline-item h4 { font-size: 1rem; font-weight: 600; margin-bottom: 6px; }
.timeline-item p { font-size: 0.88rem; color: var(--text-secondary); line-height: 1.7; }
.timeline-item .project-type {
    display: inline-block; font-size: 0.72rem; padding: 2px 8px;
    border-radius: 4px; margin-bottom: 8px;
    background: var(--blue-light); color: var(--blue-accent); font-weight: 500;
}

/* ---- PUBLICATIONS ---- */
.pub-tabs {
    display: flex; gap: 8px; justify-content: center;
    flex-wrap: wrap; margin-bottom: 32px;
}
.pub-tab {
    padding: 8px 20px; border-radius: 20px;
    border: 1px solid var(--border-light); background: var(--bg-white);
    font-size: 0.88rem; cursor: pointer; transition: var(--transition);
    font-weight: 500; color: var(--text-secondary);
}
.pub-tab.active, .pub-tab:hover {
    background: var(--green-primary); color: #fff; border-color: var(--green-primary);
}
.pub-list { list-style: none; }
.pub-item {
    padding: 16px 20px; margin-bottom: 12px;
    background: var(--bg-white); border-radius: var(--radius-sm);
    border: 1px solid var(--border-light);
    transition: var(--transition); font-size: 0.9rem;
    line-height: 1.7;
}
.pub-item:hover { border-color: var(--green-primary); box-shadow: var(--shadow-sm); }
.pub-item .pub-title { font-weight: 600; color: var(--text-primary); }
.pub-item .pub-authors { color: var(--text-secondary); font-size: 0.85rem; }
.pub-item .pub-venue {
    color: var(--green-primary); font-style: italic; font-size: 0.85rem;
}
.pub-item .pub-year {
    display: inline-block; background: var(--green-light); color: var(--green-dark);
    padding: 1px 8px; border-radius: 4px; font-size: 0.75rem; font-weight: 600;
    margin-right: 8px;
}

/* ---- TEAM SECTION ---- */
.team-category { margin-bottom: 40px; }
.team-category-title {
    font-size: 1.1rem; font-weight: 600; color: var(--green-dark);
    margin-bottom: 24px; margin-top: 0; padding-bottom: 8px;
    border-bottom: 2px solid var(--green-light);
}
/* Faculty cards */
.faculty-grid { display: flex; flex-direction: column; gap: 20px; }
.faculty-card {
    display: flex; gap: 24px; align-items: flex-start;
    background: var(--bg-white); border-radius: var(--radius-md);
    padding: 24px; border: 1px solid var(--border-light);
    transition: var(--transition);
}
.faculty-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.faculty-avatar {
    width: 96px; height: 96px; border-radius: 50%;
    object-fit: cover; flex-shrink: 0;
    border: 3px solid var(--green-light);
}
.faculty-info { flex: 1; min-width: 0; }
.faculty-name {
    font-size: 1.1rem; font-weight: 700; color: var(--text-primary);
    margin-bottom: 4px;
}
.faculty-title {
    font-size: 0.85rem; font-weight: 400; color: var(--green-primary);
    margin-left: 8px;
}
.faculty-dept { font-size: 0.85rem; color: var(--text-muted); margin-bottom: 10px; }
.faculty-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 12px; }
.faculty-links { display: flex; flex-wrap: wrap; gap: 12px; }
.faculty-links a {
    font-size: 0.82rem; color: var(--green-primary); text-decoration: none;
    display: flex; align-items: center; gap: 5px;
}
.faculty-links a:hover { color: var(--green-dark); text-decoration: underline; }
/* Staff grid */
.team-grid {
    display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 16px;
}
.team-member {
    background: var(--bg-white); border-radius: var(--radius-md);
    padding: 20px 16px; text-align: center;
    border: 1px solid var(--border-light); transition: var(--transition);
}
.team-member:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.team-member .avatar {
    width: 64px; height: 64px; border-radius: 50%;
    background: var(--green-light); color: var(--green-primary);
    display: flex; align-items: center; justify-content: center;
    margin: 0 auto 12px; font-size: 1.5rem; font-weight: 700;
}
.team-member .name { font-weight: 600; font-size: 0.95rem; }
.team-member .role { font-size: 0.8rem; color: var(--text-muted); margin-top: 4px; }
@media (max-width: 640px) {
    .faculty-card { flex-direction: column; align-items: center; text-align: center; }
    .faculty-links { justify-content: center; }
    .faculty-tags { justify-content: center; }
}

/* ---- TEACHING ---- */
.teaching-grid {
    display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 20px;
}
.teaching-card {
    background: var(--bg-white); border-radius: var(--radius-md);
    padding: 28px 24px; border: 1px solid var(--border-light);
    transition: var(--transition);
}
.teaching-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.teaching-card .course-icon {
    font-size: 1.8rem; margin-bottom: 12px;
}
.teaching-card h4 { font-size: 1rem; font-weight: 600; margin-bottom: 6px; }
.teaching-card p { font-size: 0.85rem; color: var(--text-secondary); }

/* ---- JOIN US ---- */
.joinus-content {
    max-width: 800px; margin: 0 auto; text-align: center;
}
.joinus-content p {
    font-size: 1.05rem; line-height: 1.9; opacity: 0.9; margin-bottom: 16px;
}
.joinus-cards {
    display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px; margin-top: 32px;
}
.joinus-card {
    background: rgba(255,255,255,0.15);
    border: 1px solid rgba(255,255,255,0.35);
    border-radius: var(--radius-md); padding: 24px;
    transition: var(--transition);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    color: #fff;
}
.joinus-card:hover {
    background: rgba(255,255,255,0.25);
    transform: translateY(-3px);
    box-shadow: 0 8px 32px rgba(0,0,0,0.2);
}
.joinus-card .jc-icon {
    font-size: 2rem; margin-bottom: 12px;
    color: rgba(255,255,255,0.95);
    text-shadow: 0 1px 4px rgba(0,0,0,0.3);
}
.joinus-card h4 {
    font-size: 1rem; font-weight: 600; margin-bottom: 8px;
    color: #fff; text-shadow: 0 1px 3px rgba(0,0,0,0.3);
}
.joinus-card p {
    font-size: 0.85rem; line-height: 1.6;
    color: rgba(255,255,255,0.88);
}

/* ---- CONTACT ---- */
.contact-grid {
    display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 32px; max-width: 900px; margin: 0 auto;
}
.contact-item {
    display: flex; align-items: flex-start; gap: 16px;
}
.contact-item .ci-icon {
    width: 48px; height: 48px; min-width: 48px;
    border-radius: var(--radius-sm); display: flex;
    align-items: center; justify-content: center;
    background: var(--green-light); color: var(--green-primary);
    font-size: 1.2rem;
}
.contact-item h4 { font-size: 0.95rem; font-weight: 600; margin-bottom: 4px; }
.contact-item p { font-size: 0.88rem; color: var(--text-secondary); line-height: 1.6; }

/* ---- FOOTER ---- */
#footer {
    background: var(--hero-dark); color: rgba(255,255,255,0.7);
    padding: 32px 0; font-size: 0.85rem;
}
.footer-content {
    display: flex; align-items: center; justify-content: space-between;
    flex-wrap: wrap; gap: 16px;
}
.footer-logo {
    display: flex; align-items: center; gap: 10px;
}
.footer-logo img { height: 32px; opacity: 0.8; }
.footer-logo span { font-weight: 500; }
.footer-info { text-align: right; }
.footer-info p { margin: 4px 0; }

/* ---- BACK TO TOP ---- */
.back-to-top {
    position: fixed; bottom: 32px; right: 32px;
    width: 44px; height: 44px; border-radius: 50%;
    background: var(--green-primary); color: #fff;
    border: none; cursor: pointer; font-size: 1rem;
    box-shadow: var(--shadow-md); z-index: 999;
    opacity: 0; transform: translateY(20px);
    transition: var(--transition);
}
.back-to-top.visible { opacity: 1; transform: translateY(0); }
.back-to-top:hover { background: var(--green-dark); transform: translateY(-3px); }

/* ---- SCROLL ANIMATIONS ---- */
.fade-in { opacity: 0; transform: translateY(30px); transition: all 0.6s ease-out; }
.fade-in.visible { opacity: 1; transform: translateY(0); }

/* ---- RESPONSIVE ---- */
@media (max-width: 900px) {
    .about-grid { grid-template-columns: 1fr; text-align: center; }
    .about-photo { position: static; }
    .research-grid { grid-template-columns: repeat(2, 1fr); }
    .nav-links {
        display: none; position: fixed;
        top: 64px; left: 0; right: 0;
        background: rgba(255,255,255,0.98); flex-direction: column;
        padding: 20px; gap: 4px;
        box-shadow: var(--shadow-lg); border-top: 1px solid var(--border-light);
    }
    .nav-links.open { display: flex; }
    .nav-links a { color: var(--text-primary) !important; padding: 10px 16px; }
    .nav-links a:hover, .nav-links a.active {
        background: var(--green-light) !important; color: var(--green-primary) !important;
    }
    .hamburger { display: block; } .hamburger i { font-size: 1.2rem; color: var(--green-dark); }
    .footer-content { flex-direction: column; text-align: center; }
    .footer-info { text-align: center; }
}

@media (max-width: 600px) {
    .section { padding: 60px 0; }
    .section-title { font-size: 1.5rem; margin-bottom: 32px; }
    .hero-title { letter-spacing: 0; }
    .container { padding: 0 16px; }
    .about-photo img { width: 160px; height: 200px; }
    .research-grid { grid-template-columns: 1fr; }
    .team-grid { grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); }
    .teaching-grid { grid-template-columns: 1fr; }
    .contact-grid { grid-template-columns: 1fr; }
    .project-table { font-size: 0.8rem; }
}

/* ---- PROJECT TABLE ---- */
.project-table-wrap { overflow-x: auto; margin-top: 8px; }
.project-table {
    width: 100%; border-collapse: collapse;
    font-size: 0.92rem; background: var(--bg-white);
    border-radius: var(--radius-md); overflow: hidden;
    box-shadow: 0 1px 8px rgba(0,0,0,0.06);
}
.project-table thead tr {
    background: var(--green-dark); color: #fff;
}
.project-table th {
    padding: 12px 14px; font-weight: 600;
    text-align: left; white-space: nowrap;
}
.project-table tbody tr {
    border-bottom: 1px solid var(--border-light);
    transition: background 0.15s;
}
.project-table tbody tr:last-child { border-bottom: none; }
.project-table tbody tr:hover { background: var(--green-light); }
.project-table td {
    padding: 11px 14px; color: var(--text-secondary);
    vertical-align: top; line-height: 1.6;
}
.project-table td:first-child { color: var(--text-muted); text-align: center; }
.project-type.past {
    background: #f0f0f0; color: var(--text-muted);
}

/* ========== News Section ========== */
.news-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}
.news-card {
    display: flex;
    background: #fff;
    border-radius: var(--radius);
    box-shadow: 0 2px 12px rgba(0,0,0,0.07);
    overflow: hidden;
    transition: transform 0.2s, box-shadow 0.2s;
    height: 160px;
}
.news-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 24px rgba(0,0,0,0.13);
}
.news-img-wrap {
    flex: 0 0 240px;
    max-width: 240px;
    overflow: hidden;
    background: var(--green-light);
}
.news-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.3s;
}
.news-card:hover .news-img {
    transform: scale(1.05);
}
.news-body {
    flex: 1;
    padding: 0 28px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 10px;
}
.news-date {
    font-size: 0.78rem;
    font-weight: 700;
    color: var(--green-primary);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    font-variant-numeric: tabular-nums;
}
.news-title {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1.55;
    margin: 0;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
@media (max-width: 700px) {
    .news-card { flex-direction: column; height: auto; }
    .news-img-wrap { flex: 0 0 180px; max-width: 100%; height: 180px; }
    .news-body { padding: 16px 18px; }
}
.news-more-wrap {
    text-align: center;
    margin-top: 12px;
}
.news-more-btn {
    display: inline-block;
    padding: 10px 36px;
    border: 2px solid var(--green-primary);
    color: var(--green-primary);
    border-radius: 999px;
    font-size: 0.95rem;
    font-weight: 600;
    text-decoration: none;
    transition: background 0.2s, color 0.2s;
    letter-spacing: 0.04em;
}
.news-more-btn:hover {
    background: var(--green-primary);
    color: #fff;
}

/* ---- 子页面 Hero ---- */
.page-hero {
    padding: 120px 0 48px;
    background: linear-gradient(135deg, var(--green-dark) 0%, #1a3a2a 100%);
    color: #fff;
    text-align: center;
}
.page-hero h1 {
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 12px;
    letter-spacing: 0.02em;
}
.page-hero p {
    font-size: 1rem;
    color: rgba(255,255,255,0.75);
    margin: 0;
}