/* ==========================================================================
   CSS Reset & Variables
   ========================================================================== */
:root {
    /* Colors - Blue & White Theme */
    --color-primary: #0A438A; /* Classic Law Firm Blue */
    --color-primary-hover: #072e61;
    --color-secondary: #F0F5FA; /* Very Light Blue for backgrounds */
    --color-white: #ffffff;
    --color-black: #000000;
    
    --color-title: #222222;
    --color-body: #555555;
    --color-border: #E0E0E0;
    --color-border-light: #F0F0F0;
    
    /* Typography */
    --font-heading: 'Noto Sans SC', sans-serif;
    --font-body: 'Noto Sans SC', sans-serif;
    
    /* Layout */
    --container-width: 1200px;
    --section-padding: 80px;
    
    /* Transitions */
    --transition-fast: 0.2s ease-in-out;
    --transition-normal: 0.4s ease-in-out;
}

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

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

body {
    font-family: var(--font-body);
    color: var(--color-body);
    background-color: var(--color-white);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    color: var(--color-title);
    font-weight: 500;
    line-height: 1.3;
}

a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition-fast);
}

ul {
    list-style: none;
}

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

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn {
    display: inline-block;
    padding: 12px 32px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    border: none;
    transition: all var(--transition-fast);
    text-align: center;
}

.btn-primary {
    background-color: var(--color-primary);
    color: var(--color-white);
}

.btn-primary:hover {
    background-color: var(--color-primary-hover);
}

/* ==========================================================================
   Layout & Grid
   ========================================================================== */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: var(--section-padding) 0;
}

.section-light {
    background-color: var(--color-secondary);
}

.grid {
    display: grid;
    gap: 40px;
}

.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid-cols-4 { grid-template-columns: repeat(4, 1fr); }

/* ==========================================================================
   Header & Nav (Double Layer)
   ========================================================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: var(--color-white);
    z-index: 1000;
    transition: box-shadow var(--transition-fast);
    border-bottom: 2px solid var(--color-primary);
}

.header.scrolled {
    box-shadow: 0 4px 15px rgba(0,0,0,0.08);
}

/* Top Bar: Logo & Lang */
.header-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 24px;
    max-width: var(--container-width);
    margin: 0 auto;
}

.logo {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--color-primary);
    letter-spacing: 1px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.lang-switch {
    font-size: 0.85rem;
    color: var(--color-body);
    cursor: pointer;
    display: flex;
    align-items: center;
    transition: opacity var(--transition-fast);
}

.lang-switch:hover {
    opacity: 0.8;
}

.header-top-right {
    display: flex;
    align-items: center;
    gap: 32px;
}

.top-links {
    display: flex;
    gap: 24px;
}

.top-links a {
    font-size: 0.85rem;
    color: var(--color-body);
    transition: color var(--transition-fast);
}

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

/* Bottom Bar: Navigation */
.header-bottom {
    background-color: var(--color-secondary);
    border-top: 1px solid var(--color-border-light);
}

.nav-container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
}

.nav-links {
    display: flex;
    gap: 48px; /* wider gap for prominence */
}

.nav-links a {
    font-size: 1.05rem; /* slightly larger */
    font-weight: 500;
    color: var(--color-title);
    padding: 16px 0;
    display: inline-block;
    position: relative;
}

.nav-links a:hover, .nav-links a.active {
    color: var(--color-primary);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 3px;
    background-color: var(--color-primary);
    transition: width var(--transition-fast);
}

.nav-links a:hover::after, .nav-links a.active::after {
    width: 100%;
}

/* ==========================================================================
   Hero Slider
   ========================================================================== */
.hero {
    margin-top: 135px; /* Offset for double-layer fixed header (approx 78px + 57px) */
    height: 600px;
    position: relative;
    overflow: hidden;
    background-color: var(--color-primary);
}

.hero-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 1s ease-in-out;
    background-size: cover;
    background-position: center;
}

.hero-slide.active {
    opacity: 1;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to right, rgba(10, 67, 138, 0.8) 0%, rgba(10, 67, 138, 0.2) 100%);
}

.hero-content {
    position: relative;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    z-index: 10;
    color: var(--color-white);
}

.hero-content h1 {
    font-size: 3.5rem;
    color: var(--color-white);
    margin-bottom: 24px;
    max-width: 800px;
}

.hero-content p {
    font-size: 1.2rem;
    opacity: 0.9;
    max-width: 600px;
}

/* ==========================================================================
   Section Headers
   ========================================================================== */
.section-header {
    margin-bottom: 48px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 2px solid var(--color-primary);
    padding-bottom: 16px;
}

.section-header h2 {
    font-size: 1.8rem;
    color: var(--color-primary);
}

.section-header .more-link {
    font-size: 0.9rem;
    color: var(--color-body);
}

.section-header .more-link:hover {
    color: var(--color-primary);
}

/* ==========================================================================
   News & Cases (Longan Style)
   ========================================================================== */
.news-tabs {
    display: flex;
    border-bottom: 2px solid var(--color-border);
    margin-bottom: 32px;
}

.news-tab {
    padding: 16px 32px;
    font-size: 1.2rem;
    font-weight: 500;
    color: var(--color-title);
    cursor: pointer;
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px; /* overlap border */
    transition: all var(--transition-fast);
}

.news-tab.active {
    color: var(--color-primary);
    border-bottom-color: var(--color-primary);
}

.news-list {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.news-item {
    display: flex;
    gap: 24px;
    padding-bottom: 24px;
    border-bottom: 1px dashed var(--color-border);
    transition: transform var(--transition-fast);
}

.news-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.news-item:hover {
    transform: translateX(8px);
}

.news-thumb {
    width: 200px;
    height: 130px;
    flex-shrink: 0;
    overflow: hidden;
    background-color: var(--color-border-light);
}

.news-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-normal);
}

.news-item:hover .news-thumb img {
    transform: scale(1.05);
}

.news-content {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.news-content h3 {
    font-size: 1.2rem;
    margin-bottom: 8px;
    transition: color var(--transition-fast);
}

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

.news-date {
    font-size: 0.85rem;
    color: var(--color-primary);
    margin-bottom: 12px;
}

.news-excerpt {
    font-size: 0.95rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* ==========================================================================
   Booking CTA Section
   ========================================================================== */
.cta-section {
    background-color: var(--color-primary);
    color: var(--color-white);
    text-align: center;
    padding: 80px 0;
}

.cta-section h2 {
    color: var(--color-white);
    margin-bottom: 24px;
}

.cta-section p {
    opacity: 0.9;
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.btn-white {
    background-color: var(--color-white);
    color: var(--color-primary);
}

.btn-white:hover {
    background-color: var(--color-secondary);
}

/* ==========================================================================
   Booking Modal (Blue/White Theme)
   ========================================================================== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(10, 67, 138, 0.4);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 2000;
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: var(--color-white);
    width: 100%;
    max-width: 500px;
    padding: 48px;
    position: relative;
    transform: translateY(20px);
    transition: all var(--transition-normal);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
    /* No border radius per preference */
}

.modal-overlay.active .modal-content {
    transform: translateY(0);
}

.modal-close {
    position: absolute;
    top: 24px;
    right: 24px;
    background: none;
    border: none;
    font-size: 2rem;
    color: var(--color-body);
    cursor: pointer;
    line-height: 1;
    transition: color var(--transition-fast);
}

.modal-close:hover {
    color: var(--color-primary);
}

.modal-header h2 {
    font-size: 1.8rem;
    margin-bottom: 12px;
    color: var(--color-primary);
}

.modal-header p {
    color: var(--color-body);
    margin-bottom: 32px;
    font-size: 0.95rem;
}

.form-group {
    position: relative;
    margin-bottom: 32px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 0;
    background: transparent;
    border: none;
    border-bottom: 1px solid var(--color-border);
    font-size: 1rem;
    color: var(--color-title);
    transition: border-color var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-bottom-color: var(--color-primary);
}

.form-group label {
    position: absolute;
    top: 12px;
    left: 0;
    font-size: 1rem;
    color: var(--color-body);
    transition: all var(--transition-fast);
    pointer-events: none;
}

.form-group input:focus ~ label,
.form-group input:valid ~ label,
.form-group textarea:focus ~ label,
.form-group textarea:valid ~ label {
    top: -16px;
    font-size: 0.8rem;
    color: var(--color-primary);
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer {
    background-color: var(--color-primary);
    color: var(--color-white);
    padding: 60px 0 20px;
}

.footer-top {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 60px;
    margin-bottom: 40px;
}

.footer h3 {
    font-size: 1.1rem;
    color: var(--color-white);
    margin-bottom: 24px;
    border-left: 3px solid var(--color-white);
    padding-left: 12px;
}

.footer-logo {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.footer-contact li {
    margin-bottom: 12px;
    font-size: 0.95rem;
    opacity: 0.8;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255,255,255,0.1);
    font-size: 0.85rem;
    opacity: 0.6;
}

/* ==========================================================================
   Mobile Responsiveness (V2)
   ========================================================================== */
@media (max-width: 768px) {
    /* Grids */
    .grid-cols-2, .grid-cols-3, .grid-cols-4 {
        grid-template-columns: 1fr !important;
        gap: 32px !important;
    }

    /* Typography */
    h1 { font-size: 2.2rem; }
    h2 { font-size: 1.8rem; }
    
    /* Header - Double Layer Adaptation */
    .header {
        position: relative; /* Remove fixed to avoid complexity with double layer on mobile */
    }
    
    .hero {
        margin-top: 0; /* Remove offset */
        height: 400px;
    }

    .top-links {
        display: none; /* Hide utility links on mobile for a cleaner header */
    }

    .nav-links {
        gap: 20px;
        overflow-x: auto;
        white-space: nowrap;
        padding-bottom: 8px; /* For scrollbar */
        -webkit-overflow-scrolling: touch;
    }
    
    .nav-links::-webkit-scrollbar {
        height: 4px;
    }
    .nav-links::-webkit-scrollbar-thumb {
        background-color: var(--color-primary);
    }

    /* News & Cases - Stacked layout */
    .news-item {
        flex-direction: column;
    }
    
    .news-thumb {
        width: 100%;
        height: 200px;
    }

    /* Stats Grid */
    .about-stats {
        grid-template-columns: 1fr 1fr !important; /* Keep 2 cols for stats on mobile */
        gap: 20px !important;
    }
    
    .stat-number {
        font-size: 2.2rem !important;
    }

    /* Footer */
    .footer-top {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    /* Modal */
    .modal-content {
        padding: 32px 24px;
        margin: 0 16px;
    }
}

/* ==========================================================================
   Page Layouts (About, etc.)
   ========================================================================== */
.page-banner {
    margin-top: 135px; /* Offset for double-layer fixed header */
    height: 350px;
    background-size: cover;
    background-position: center;
    position: relative;
    display: flex;
    align-items: center;
}

.page-banner::before {
    content: '';
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(10, 67, 138, 0.65);
}

.page-banner h1 {
    position: relative;
    color: var(--color-white);
    font-size: 2.8rem;
    z-index: 1;
}

.page-layout {
    display: grid;
    grid-template-columns: 240px 1fr;
    gap: 80px;
    padding: 80px 24px;
}

.sidebar-nav ul {
    border-top: 2px solid var(--color-primary);
    padding-top: 24px;
}

.sidebar-nav li {
    margin-bottom: 20px;
}

.sidebar-nav a {
    display: block;
    font-size: 1.15rem;
    color: var(--color-title);
    transition: all var(--transition-fast);
}

.sidebar-nav li.active a, .sidebar-nav a:hover {
    color: var(--color-primary);
    font-weight: 500;
}

.main-article .article-title {
    font-size: 2.2rem;
    color: var(--color-primary);
    margin-bottom: 32px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--color-border);
}

.article-content h3 {
    font-size: 1.3rem;
    color: var(--color-primary);
    margin: 40px 0 20px;
}

.article-content p {
    margin-bottom: 24px;
    font-size: 1.05rem;
    color: var(--color-body);
    line-height: 1.8;
}

@media (max-width: 768px) {
    .page-banner {
        margin-top: 0;
        height: 200px;
    }
    .page-banner h1 {
        font-size: 2rem;
    }
    .page-layout {
        grid-template-columns: 1fr;
        gap: 40px;
        padding: 40px 16px;
    }
    .sidebar-nav ul {
        display: flex;
        overflow-x: auto;
        white-space: nowrap;
        gap: 32px;
        padding-bottom: 12px;
    }
    .sidebar-nav li {
        margin-bottom: 0;
    }
}

/* ==========================================================================
   Subpages Specific Layouts (Practice, Team, News)
   ========================================================================== */

/* Practice Areas Grid */
.v2-practice-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
}

.v2-practice-card {
    background: var(--color-white);
    border: 1px solid var(--color-border);
    padding: 32px 24px;
    transition: all var(--transition-fast);
}

.v2-practice-card:hover {
    border-color: var(--color-primary);
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
    transform: translateY(-4px);
}

.v2-practice-card h3 {
    font-size: 1.25rem;
    color: var(--color-primary);
    margin-bottom: 12px;
}

.v2-practice-card p {
    font-size: 0.95rem;
    color: var(--color-body);
    line-height: 1.6;
}

/* Team Grid */
.v2-team-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.v2-team-card {
    background: var(--color-white);
    border: 1px solid var(--color-border);
    overflow: hidden;
    transition: all var(--transition-fast);
}

.v2-team-card:hover {
    box-shadow: 0 15px 35px rgba(0,0,0,0.1);
}

.v2-team-img {
    width: 100%;
    aspect-ratio: 3/4;
    overflow: hidden;
    background: var(--color-border-light);
}

.v2-team-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.v2-team-card:hover .v2-team-img img {
    transform: scale(1.05);
}

.v2-team-info {
    padding: 24px;
    text-align: center;
}

.v2-team-info h3 {
    font-size: 1.25rem;
    color: var(--color-primary);
    margin-bottom: 8px;
}

.v2-team-info p {
    font-size: 0.95rem;
    color: var(--color-body);
}

/* Subpage Media Queries */
@media (max-width: 768px) {
    .v2-practice-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    
    .v2-team-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }

    .v2-team-info {
        padding: 16px 8px;
    }

    .v2-team-info h3 {
        font-size: 1.1rem;
    }

    .v2-team-info p {
        font-size: 0.85rem;
    }
}