:root {
    --primary-color: #8B7355;
    --primary-dark: #5D4E37;
    --primary-light: #A89070;
    --secondary-color: #2C3E50;
    --accent-color: #7B9E89;
    --accent-dark: #5A7A63;
    --gold-color: #B8860B;
    --gold-light: #D4A84B;
    --jade-color: #5B8C5A;
    --ink-color: #2C2C2C;
    --rice-color: #F5F0E6;
    --cream-color: #FAF7F2;
    --warm-gray: #E8E0D5;
    --text-color: #3D3D3D;
    --text-light: #6B6B6B;
    --text-muted: #8C8C8C;
    --white: #FFF;
    --shadow: 0 2px 12px rgba(93, 78, 55, 0.1);
    --shadow-lg: 0 8px 32px rgba(93, 78, 55, 0.15);
    --shadow-xl: 0 16px 48px rgba(93, 78, 55, 0.2);
    --border-radius: 12px;
    --border-radius-sm: 8px;
    --transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    --font-serif: 'Noto Serif SC', 'Songti SC', serif;
    --font-sans: 'Noto Sans SC', 'PingFang SC', sans-serif;
    --touch-target-min: 44px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

html {
    scroll-behavior: smooth;
    font-size: 14px;
}

body {
    font-family: var(--font-sans);
    background-color: var(--cream-color);
    color: var(--text-color);
    line-height: 1.7;
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle at 20% 80%, rgba(123, 158, 137, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(184, 134, 11, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 50% 50%, rgba(139, 115, 85, 0.03) 0%, transparent 70%);
    pointer-events: none;
    z-index: -1;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 12px;
}

.header {
    background: linear-gradient(135deg, rgba(45, 45, 45, 0.95) 0%, rgba(60, 50, 40, 0.95) 100%);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    color: var(--white);
    padding: 10px 0;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.15);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    min-height: var(--touch-target-min);
}

.logo-icon {
    font-size: 1.6rem;
    animation: rotate 20s linear infinite;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.3));
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.logo h1 {
    font-family: var(--font-serif);
    font-size: 1.1rem;
    font-weight: 600;
    letter-spacing: 1px;
    background: linear-gradient(135deg, #fff 0%, #e0d5c5 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav {
    display: flex;
    position: fixed;
    top: 56px;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(45, 45, 45, 0.98) 0%, rgba(60, 50, 40, 0.98) 100%);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 20px 16px calc(40px + env(safe-area-inset-bottom));
    gap: 12px;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity 0.3s ease, visibility 0.3s ease, transform 0.3s ease;
    pointer-events: none;
    align-items: stretch;
    justify-content: flex-start;
    box-sizing: border-box;
    min-height: 100vh;
}

.nav.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    pointer-events: auto;
}

.nav-link {
    color: rgba(255, 255, 255, 0.85);
    text-decoration: none;
    font-size: clamp(1rem, 4vw, 1.2rem);
    padding: 16px 20px;
    border-radius: var(--border-radius);
    transition: var(--transition);
    position: relative;
    font-weight: 500;
    min-height: max(56px, var(--touch-target-min));
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    width: 100%;
    max-width: 100%;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.05);
    white-space: nowrap;
    overflow: visible;
    text-overflow: clip;
    flex-shrink: 0;
    box-sizing: border-box;
    margin: 0;
}

.nav-link:active {
    color: var(--white);
    background-color: rgba(255, 255, 255, 0.15);
    transform: scale(0.98);
}

.nav-link:focus {
    outline: 2px solid var(--gold-light);
    outline-offset: 2px;
}

.nav-link.active {
    color: var(--white);
    background-color: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.1);
}

.mobile-menu-btn {
    display: flex;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 10px;
    border-radius: var(--border-radius-sm);
    transition: var(--transition);
    width: var(--touch-target-min);
    height: var(--touch-target-min);
    align-items: center;
    justify-content: center;
    min-width: var(--touch-target-min);
    min-height: var(--touch-target-min);
    z-index: 1001;
    position: relative;
    flex-shrink: 0;
}

.mobile-menu-btn:active {
    background-color: rgba(255, 255, 255, 0.1);
    transform: scale(0.95);
}

.mobile-menu-btn:focus {
    outline: 2px solid var(--gold-light);
    outline-offset: 2px;
}

.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2.5px;
    background-color: var(--white);
    border-radius: 2px;
    transition: var(--transition);
    transform-origin: center;
}

.mobile-menu-btn.active span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.mobile-menu-btn.active span:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}

.mobile-menu-btn.active span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

.main {
    margin-top: 56px;
}

.section {
    display: none;
    padding: 30px 0;
    min-height: auto;
}

.section.active {
    display: block;
}

.section-title {
    font-family: var(--font-serif);
    font-size: 1.3rem;
    color: var(--ink-color);
    text-align: center;
    margin-bottom: 12px;
    position: relative;
    letter-spacing: 2px;
}

.section-desc {
    text-align: center;
    color: var(--text-muted);
    margin-bottom: 24px;
    font-size: 0.95rem;
    padding: 0 8px;
}

.hero-section {
    background: linear-gradient(180deg, var(--cream-color) 0%, var(--rice-color) 100%);
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    padding: 30px 0 40px;
}

.hero-section.active {
    display: flex;
}

.hero-bg-images {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
    z-index: 0;
}

.hero-bg-img {
    position: absolute;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    opacity: 0;
    transition: opacity 1.5s ease;
}

.hero-bg-img.loaded {
    opacity: 1;
}

.hero-bg-img-1 {
    top: -5%;
    right: -10%;
    width: 50%;
    height: 60%;
    background-image: url('../images/1.jpg');
    mask-image: linear-gradient(135deg, transparent 0%, rgba(0,0,0,0.12) 25%, rgba(0,0,0,0.18) 45%, transparent 65%);
    -webkit-mask-image: linear-gradient(135deg, transparent 0%, rgba(0,0,0,0.12) 25%, rgba(0,0,0,0.18) 45%, transparent 65%);
    filter: sepia(0.25) saturate(0.85) brightness(1.08);
    transform: rotate(-3deg);
}

.hero-bg-img-2 {
    bottom: -10%;
    left: -8%;
    width: 45%;
    height: 55%;
    background-image: url('../images/2.jpg');
    mask-image: linear-gradient(45deg, transparent 0%, rgba(0,0,0,0.15) 35%, rgba(0,0,0,0.12) 55%, transparent 75%);
    -webkit-mask-image: linear-gradient(45deg, transparent 0%, rgba(0,0,0,0.15) 35%, rgba(0,0,0,0.12) 55%, transparent 75%);
    filter: sepia(0.35) saturate(0.75) brightness(1.05);
    transform: rotate(5deg);
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(ellipse at center, transparent 0%, var(--cream-color) 70%);
    z-index: 1;
    pointer-events: none;
}

.hero-content {
    text-align: center;
    width: 100%;
    position: relative;
    z-index: 2;
}

.hero-title {
    margin-bottom: 30px;
}

.bagua-symbol {
    display: block;
    font-size: 1.6rem;
    letter-spacing: 4px;
    color: var(--primary-color);
    margin-bottom: 16px;
    animation: pulse 3s ease-in-out infinite;
    text-shadow: 0 2px 8px rgba(139, 115, 85, 0.2);
}

@keyframes pulse {
    0%, 100% { opacity: 0.6; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.02); }
}

.hero-title h2 {
    font-family: var(--font-serif);
    font-size: 1.6rem;
    color: var(--ink-color);
    margin-bottom: 10px;
    letter-spacing: 3px;
    font-weight: 600;
}

.subtitle {
    font-size: 1rem;
    color: var(--text-light);
    letter-spacing: 1px;
}

.hero-features {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
    margin-bottom: 30px;
}

.feature-card {
    background: linear-gradient(135deg, var(--white) 0%, var(--cream-color) 100%);
    padding: 24px 20px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid rgba(139, 115, 85, 0.1);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-color), var(--jade-color), var(--accent-color));
    opacity: 0;
    transition: var(--transition);
}

.feature-card:active {
    transform: scale(0.98);
}

.feature-icon {
    font-size: 2.2rem;
    margin-bottom: 12px;
    display: block;
}

.feature-card h3 {
    font-family: var(--font-serif);
    font-size: 1.1rem;
    color: var(--primary-dark);
    margin-bottom: 8px;
    letter-spacing: 1px;
}

.feature-card p {
    color: var(--text-muted);
    font-size: 0.9rem;
    line-height: 1.6;
}

.quick-search {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.quick-search input {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--warm-gray);
    border-radius: var(--border-radius);
    font-size: 1rem;
    outline: none;
    transition: var(--transition);
    background: var(--white);
    font-family: var(--font-sans);
    min-height: var(--touch-target-min);
}

.quick-search input:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 4px rgba(123, 158, 137, 0.15);
}

.quick-search button {
    width: 100%;
    padding: 12px 24px;
    background: linear-gradient(135deg, var(--accent-color) 0%, var(--accent-dark) 100%);
    color: var(--white);
    border: none;
    border-radius: var(--border-radius);
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
    font-weight: 500;
    letter-spacing: 1px;
    box-shadow: 0 4px 12px rgba(123, 158, 137, 0.3);
    min-height: var(--touch-target-min);
}

.quick-search button:active {
    transform: scale(0.98);
}

.search-section {
    background: linear-gradient(180deg, var(--rice-color) 0%, var(--cream-color) 100%);
    position: relative;
    overflow: hidden;
}

.section-bg-decoration {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
    pointer-events: none;
    z-index: 0;
}

.bg-img-accent {
    position: absolute;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    opacity: 0;
    transition: opacity 1.2s ease;
}

.bg-img-accent.loaded {
    opacity: 1;
}

.bg-img-accent-1 {
    top: 10%;
    right: -15%;
    width: 40%;
    height: 50%;
    background-image: url('../images/3.jpg');
    mask-image: radial-gradient(ellipse at 30% 50%, rgba(0,0,0,0.1) 0%, rgba(0,0,0,0.15) 30%, transparent 60%);
    -webkit-mask-image: radial-gradient(ellipse at 30% 50%, rgba(0,0,0,0.1) 0%, rgba(0,0,0,0.15) 30%, transparent 60%);
    filter: sepia(0.3) saturate(0.8) brightness(1.1);
}

.bg-img-accent-2 {
    bottom: 5%;
    left: -10%;
    width: 35%;
    height: 45%;
    background-image: url('../images/4.jpg');
    mask-image: radial-gradient(ellipse at 70% 40%, rgba(0,0,0,0.12) 0%, rgba(0,0,0,0.1) 25%, transparent 55%);
    -webkit-mask-image: radial-gradient(ellipse at 70% 40%, rgba(0,0,0,0.12) 0%, rgba(0,0,0,0.1) 25%, transparent 55%);
    filter: sepia(0.35) saturate(0.75) brightness(1.08);
}

.bg-img-accent-3 {
    top: 20%;
    right: -12%;
    width: 38%;
    height: 48%;
    background-image: url('../images/1.jpg');
    mask-image: linear-gradient(180deg, transparent 0%, rgba(0,0,0,0.08) 20%, rgba(0,0,0,0.12) 50%, transparent 80%);
    -webkit-mask-image: linear-gradient(180deg, transparent 0%, rgba(0,0,0,0.08) 20%, rgba(0,0,0,0.12) 50%, transparent 80%);
    filter: sepia(0.4) saturate(0.7) brightness(1.05);
}

.search-section .container,
.relations-section .container {
    position: relative;
    z-index: 1;
}

.search-panel {
    background: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    max-width: 860px;
    margin: 0 auto;
    border: 1px solid rgba(139, 115, 85, 0.08);
}

.search-tabs {
    display: flex;
    background: linear-gradient(135deg, var(--rice-color) 0%, var(--warm-gray) 100%);
    border-bottom: 1px solid rgba(139, 115, 85, 0.15);
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.tab-btn {
    flex: none;
    padding: 14px 16px;
    background: none;
    border: none;
    font-size: 0.9rem;
    color: var(--text-light);
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    font-family: var(--font-sans);
    font-weight: 500;
    white-space: nowrap;
    min-height: var(--touch-target-min);
    display: flex;
    align-items: center;
}

.tab-btn:active {
    color: var(--accent-color);
    background-color: rgba(123, 158, 137, 0.05);
}

.tab-btn.active {
    color: var(--accent-dark);
    background: var(--white);
}

.tab-btn.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-color), var(--jade-color));
}

.tab-content {
    display: none;
    padding: 20px 16px;
}

.tab-content.active {
    display: block;
}

.search-box {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.search-box select,
.search-box input {
    width: 100%;
    padding: 12px 14px;
    border: 2px solid var(--warm-gray);
    border-radius: var(--border-radius);
    font-size: 1rem;
    outline: none;
    transition: var(--transition);
    background: var(--white);
    font-family: var(--font-sans);
    color: var(--text-color);
    min-height: var(--touch-target-min);
}

.search-box select:focus,
.search-box input:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 4px rgba(123, 158, 137, 0.1);
}

.search-box button {
    width: 100%;
    padding: 12px 20px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: var(--white);
    border: none;
    border-radius: var(--border-radius);
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
    font-weight: 500;
    box-shadow: 0 4px 12px rgba(139, 115, 85, 0.25);
    min-height: var(--touch-target-min);
}

.search-box button:active {
    transform: scale(0.98);
}

.binary-input-container {
    text-align: center;
}

.binary-hint {
    color: var(--text-muted);
    margin-bottom: 24px;
    font-size: 0.95rem;
}

.yao-selector {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 24px;
    max-width: 320px;
    margin-left: auto;
    margin-right: auto;
}

.yao-line {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: var(--transition);
    background: linear-gradient(135deg, var(--rice-color) 0%, var(--warm-gray) 100%);
    border: 1px solid transparent;
    min-height: var(--touch-target-min);
}

.yao-line:active {
    background: linear-gradient(135deg, var(--warm-gray) 0%, #ddd5c8 100%);
    border-color: var(--accent-color);
    transform: scale(0.98);
}

.yao-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    width: 36px;
    font-family: var(--font-serif);
}

.yao-visual {
    font-family: monospace;
    font-size: 1.4rem;
    letter-spacing: 3px;
    flex: 1;
    text-align: center;
}

.yao-visual.yang {
    color: var(--primary-dark);
}

.yao-visual.yin {
    color: var(--accent-dark);
}

.yao-visual.yin::before {
    content: '━━  ━━';
}

.binary-input-container > button {
    width: 100%;
    padding: 12px 32px;
    background: linear-gradient(135deg, var(--accent-color) 0%, var(--accent-dark) 100%);
    color: var(--white);
    border: none;
    border-radius: var(--border-radius);
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
    font-weight: 500;
    box-shadow: 0 4px 12px rgba(123, 158, 137, 0.3);
    min-height: var(--touch-target-min);
}

.binary-input-container > button:active {
    transform: scale(0.98);
}

.search-result {
    margin-top: 36px;
}

.trigrams-section {
    background: linear-gradient(180deg, var(--cream-color) 0%, var(--rice-color) 100%);
    position: relative;
    overflow: hidden;
}

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

.trigram-selector {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 20px;
    position: relative;
    z-index: 1;
}

.trigram-panel {
    background: linear-gradient(135deg, var(--white) 0%, var(--cream-color) 100%);
    padding: 20px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    width: 100%;
    max-width: 320px;
    border: 1px solid rgba(139, 115, 85, 0.1);
}

.trigram-panel h3 {
    font-family: var(--font-serif);
    font-size: 1rem;
    color: var(--primary-dark);
    text-align: center;
    margin-bottom: 16px;
    letter-spacing: 2px;
}

.trigram-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 6px;
}

.trigram-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 10px 6px;
    border: 2px solid var(--warm-gray);
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: var(--transition);
    background: var(--white);
    min-height: var(--touch-target-min);
    justify-content: center;
}

.trigram-item:active {
    border-color: var(--accent-color);
    background: linear-gradient(135deg, var(--rice-color) 0%, var(--warm-gray) 100%);
    transform: scale(0.98);
}

.trigram-item.selected {
    border-color: var(--accent-color);
    background: linear-gradient(135deg, var(--accent-color) 0%, var(--accent-dark) 100%);
}

.trigram-item.selected .trigram-symbol,
.trigram-item.selected .trigram-name {
    color: var(--white);
}

.trigram-symbol {
    font-size: 1.6rem;
    color: var(--primary-color);
    margin-bottom: 4px;
}

.trigram-name {
    font-size: 0.8rem;
    color: var(--text-color);
    font-family: var(--font-serif);
}

.trigram-combine {
    display: flex;
    align-items: center;
    justify-content: center;
}

.combine-symbol {
    font-size: 1.8rem;
    color: var(--accent-color);
    font-weight: 300;
}

.combined-result {
    margin-top: 24px;
    text-align: center;
    position: relative;
    z-index: 1;
}

.combine-preview {
    background: linear-gradient(135deg, var(--white) 0%, var(--cream-color) 100%);
    padding: 24px 20px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    display: inline-block;
    width: calc(100% - 24px);
    max-width: 320px;
    border: 1px solid rgba(139, 115, 85, 0.1);
}

.preview-text {
    color: var(--text-muted);
    font-size: 1rem;
}

.hexagrams-section {
    background: linear-gradient(180deg, var(--rice-color) 0%, var(--cream-color) 100%);
    position: relative;
    overflow: hidden;
}

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

.hexagram-filter {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-bottom: 24px;
    flex-wrap: wrap;
    padding: 0 4px;
    position: relative;
    z-index: 1;
}

.filter-btn {
    padding: 10px 18px;
    background: var(--white);
    border: 2px solid var(--warm-gray);
    border-radius: 25px;
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition);
    font-weight: 500;
    color: var(--text-color);
    min-height: var(--touch-target-min);
}

.filter-btn:active {
    border-color: var(--accent-color);
    background: var(--rice-color);
}

.filter-btn.active {
    border-color: var(--accent-color);
    background: linear-gradient(135deg, var(--accent-color) 0%, var(--accent-dark) 100%);
    color: var(--white);
}

.filter-options {
    display: none;
    justify-content: center;
    gap: 8px;
    margin-bottom: 24px;
    flex-wrap: wrap;
    padding: 0 4px;
    position: relative;
    z-index: 1;
}

.filter-options.active {
    display: flex;
}

.filter-option {
    padding: 8px 14px;
    background: var(--white);
    border: 1px solid var(--warm-gray);
    border-radius: 25px;
    font-size: 0.85rem;
    cursor: pointer;
    transition: var(--transition);
    color: var(--text-color);
    min-height: var(--touch-target-min);
}

.filter-option:active {
    background: var(--rice-color);
    border-color: var(--accent-color);
}

.filter-option.active {
    background: var(--accent-color);
    color: var(--white);
    border-color: var(--accent-color);
}

.hexagrams-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
    position: relative;
    z-index: 1;
}

.hexagram-card {
    background: linear-gradient(135deg, var(--white) 0%, var(--cream-color) 100%);
    padding: 14px 10px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    border: 1px solid rgba(139, 115, 85, 0.08);
    position: relative;
    overflow: hidden;
    min-height: var(--touch-target-min);
}

.hexagram-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color), var(--primary-color));
    opacity: 0;
    transition: var(--transition);
}

.hexagram-card:active {
    transform: scale(0.98);
}

.hexagram-number {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-bottom: 6px;
    letter-spacing: 1px;
}

.hexagram-symbol {
    font-size: 1.8rem;
    color: var(--primary-color);
    margin-bottom: 8px;
    display: block;
}

.hexagram-name {
    font-family: var(--font-serif);
    font-size: 1rem;
    color: var(--ink-color);
    margin-bottom: 4px;
    letter-spacing: 2px;
}

.hexagram-full-name {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.relations-section {
    background: linear-gradient(180deg, var(--cream-color) 0%, var(--rice-color) 100%);
    position: relative;
}

.relations-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: url('../images/4.jpg');
    background-size: cover;
    background-position: center;
    opacity: 0.05;
}

.relation-selector {
    max-width: 420px;
    margin: 0 auto 36px;
    position: relative;
    z-index: 1;
}

.relation-selector select {
    width: 100%;
    padding: 12px 14px;
    border: 2px solid var(--warm-gray);
    border-radius: var(--border-radius);
    font-size: 1rem;
    outline: none;
    background: var(--white);
    font-family: var(--font-sans);
    color: var(--text-color);
    cursor: pointer;
    transition: var(--transition);
    min-height: var(--touch-target-min);
}

.relation-selector select:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 4px rgba(123, 158, 137, 0.1);
}

.relation-graph {
    background: linear-gradient(135deg, var(--white) 0%, var(--cream-color) 100%);
    padding: 20px 16px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    min-height: 300px;
    border: 1px solid rgba(139, 115, 85, 0.08);
    position: relative;
    z-index: 1;
}

.graph-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 200px;
    color: var(--text-muted);
    font-size: 1rem;
}

.relation-center {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 24px 16px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: var(--white);
    border-radius: var(--border-radius);
    margin-bottom: 24px;
    box-shadow: var(--shadow-lg);
}

.relation-center .hexagram-symbol {
    font-size: 2.8rem;
    color: var(--white);
    margin-bottom: 10px;
    opacity: 0.95;
}

.relation-center .hexagram-name {
    font-size: 1.3rem;
    color: var(--white);
    letter-spacing: 3px;
}

.relation-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
}

.relation-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 14px 10px;
    background: linear-gradient(135deg, var(--rice-color) 0%, var(--warm-gray) 100%);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    border: 1px solid transparent;
    min-height: var(--touch-target-min);
    justify-content: center;
}

.relation-item:active {
    background: linear-gradient(135deg, var(--warm-gray) 0%, #ddd5c8 100%);
    transform: scale(0.98);
    border-color: var(--accent-color);
}

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(44, 44, 44, 0.75);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 2000;
    align-items: flex-end;
    justify-content: center;
    padding: 0;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: linear-gradient(135deg, var(--white) 0%, var(--cream-color) 100%);
    border-radius: 20px 20px 0 0;
    max-width: 100%;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    box-shadow: var(--shadow-xl);
    border: 1px solid rgba(139, 115, 85, 0.15);
    transition: transform 0.3s ease;
    padding-bottom: max(0px, env(safe-area-inset-bottom));
}

.modal-close {
    position: absolute;
    top: 12px;
    right: 16px;
    font-size: 1.8rem;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-muted);
    transition: var(--transition);
    z-index: 10;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    min-width: 36px;
    min-height: 36px;
}

.modal-close:active {
    color: var(--accent-color);
    background: var(--warm-gray);
}

.modal-body {
    padding: 20px 12px;
    max-height: calc(90vh - 48px);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
}

.hexagram-detail {
    text-align: center;
}

.detail-header {
    margin-bottom: 24px;
    padding-bottom: 20px;
    border-bottom: 2px solid var(--warm-gray);
    position: relative;
}

.detail-header::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-color), var(--jade-color));
}

.detail-symbol {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 12px;
    display: block;
}

.detail-name {
    font-family: var(--font-serif);
    font-size: 1.4rem;
    color: var(--ink-color);
    margin-bottom: 8px;
    letter-spacing: 2px;
}

.detail-full-name {
    font-size: 1rem;
    color: var(--text-light);
    margin-bottom: 12px;
    letter-spacing: 1px;
}

.detail-info {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-top: 16px;
    align-items: center;
}

.info-item {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.85rem;
    color: var(--text-muted);
    background: var(--rice-color);
    padding: 6px 12px;
    border-radius: 20px;
}

.detail-section {
    text-align: left;
    margin-bottom: 20px;
}

.detail-section h3 {
    font-family: var(--font-serif);
    font-size: 1.1rem;
    color: var(--primary-dark);
    margin-bottom: 12px;
    padding-left: 14px;
    border-left: 3px solid var(--accent-color);
    letter-spacing: 1px;
}

.detail-section p {
    color: var(--text-color);
    line-height: 1.8;
    font-size: 0.95rem;
}

.detail-section p strong {
    color: var(--ink-color);
    font-weight: 500;
}

.lines-container {
    text-align: left;
}

.line-item {
    background: linear-gradient(135deg, var(--rice-color) 0%, var(--warm-gray) 100%);
    padding: 14px 12px;
    border-radius: var(--border-radius-sm);
    margin-bottom: 10px;
    transition: var(--transition);
    border: 1px solid transparent;
}

.line-item:active {
    background: linear-gradient(135deg, var(--warm-gray) 0%, #ddd5c8 100%);
    border-color: var(--accent-color);
}

.line-position {
    font-weight: 600;
    color: var(--accent-dark);
    margin-bottom: 4px;
    font-size: 0.9rem;
}

.line-text {
    font-family: var(--font-serif);
    color: var(--ink-color);
    margin-bottom: 4px;
    font-size: 1rem;
    letter-spacing: 1px;
}

.line-meaning {
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.7;
}

.line-modern {
    font-size: 0.85rem;
    color: var(--accent-dark);
    line-height: 1.7;
    margin-top: 8px;
    padding-top: 8px;
    border-top: 1px dashed var(--warm-gray);
    background: linear-gradient(135deg, rgba(123, 158, 137, 0.05) 0%, transparent 100%);
    padding: 8px 10px;
    border-radius: var(--border-radius-sm);
}

.modern-section {
    background: linear-gradient(135deg, rgba(123, 158, 137, 0.08) 0%, rgba(123, 158, 137, 0.02) 100%);
    padding: 16px;
    border-radius: var(--border-radius);
    margin-bottom: 20px;
}

.modern-section h3 {
    border-left-color: var(--jade-color);
    color: var(--accent-dark);
}

.modern-content {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.modern-item {
    background: var(--white);
    padding: 12px 14px;
    border-radius: var(--border-radius-sm);
    border-left: 3px solid var(--accent-color);
}

.modern-label {
    display: inline-block;
    font-weight: 600;
    color: var(--accent-dark);
    margin-bottom: 6px;
    font-size: 0.85rem;
}

.modern-item p {
    margin: 0;
    color: var(--text-color);
    font-size: 0.9rem;
}

.guidance-section {
    background: linear-gradient(135deg, rgba(184, 134, 11, 0.08) 0%, rgba(184, 134, 11, 0.02) 100%);
    padding: 16px;
    border-radius: var(--border-radius);
    margin-bottom: 20px;
}

.guidance-section h3 {
    border-left-color: var(--gold-color);
    color: var(--primary-dark);
}

.guidance-content {
    background: var(--white);
    padding: 14px;
    border-radius: var(--border-radius-sm);
    border-left: 3px solid var(--gold-color);
}

.guidance-content p {
    margin: 0;
    color: var(--text-color);
    line-height: 1.8;
    font-size: 0.9rem;
}

.footer {
    background: linear-gradient(135deg, #2a2a2a 0%, #1a1a1a 100%);
    color: var(--white);
    padding: 32px 0 20px;
    margin-top: 40px;
}

.footer-content {
    display: flex;
    flex-direction: column;
    text-align: center;
    gap: 24px;
    margin-bottom: 24px;
}

.footer-logo {
    font-family: var(--font-serif);
    font-size: 1.2rem;
    display: block;
    margin-bottom: 12px;
    letter-spacing: 2px;
}

.footer-info p {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.95rem;
}

.footer-links {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 16px;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.6);
    text-decoration: none;
    font-size: 0.9rem;
    transition: var(--transition);
    min-height: var(--touch-target-min);
    display: flex;
    align-items: center;
}

.footer-links a:active {
    color: var(--white);
}

.footer-copyright {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-copyright p {
    color: rgba(255, 255, 255, 0.4);
    font-size: 0.8rem;
}

.decoration-circle:nth-child(1) {
    width: 250px;
    height: 250px;
    top: -80px;
    right: -80px;
}

.decoration-circle:nth-child(2) {
    width: 180px;
    height: 180px;
    bottom: -40px;
    left: -40px;
}

.bagua-wrapper {
    display: inline-block;
    position: relative;
    padding: 16px 24px;
}

.bagua-wrapper::before,
.bagua-wrapper::after {
    content: '';
    position: absolute;
    width: 40px;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent-color), transparent);
    top: 50%;
}

.bagua-wrapper::before {
    left: -20px;
}

.bagua-wrapper::after {
    right: -20px;
}

.page-wrapper {
    position: relative;
    min-height: 100vh;
}

.hero-decoration {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
    pointer-events: none;
    z-index: 0;
}

.decoration-circle {
    position: absolute;
    border-radius: 50%;
    border: 1px solid rgba(123, 158, 137, 0.15);
}

.decoration-circle:nth-child(1) {
    width: 250px;
    height: 250px;
    top: -80px;
    right: -80px;
    animation: float 8s ease-in-out infinite;
}

.decoration-circle:nth-child(2) {
    width: 180px;
    height: 180px;
    bottom: -40px;
    left: -40px;
    animation: float 10s ease-in-out infinite reverse;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    25% { transform: translate(10px, -10px) rotate(5deg); }
    50% { transform: translate(0, -20px) rotate(0deg); }
    75% { transform: translate(-10px, -10px) rotate(-5deg); }
}

@media (min-width: 480px) {
    html {
        font-size: 15px;
    }
    
    .container {
        padding: 0 16px;
    }
    
    .header {
        padding: 12px 0;
    }
    
    .logo-icon {
        font-size: 1.8rem;
    }
    
    .logo h1 {
        font-size: 1.2rem;
        letter-spacing: 1px;
    }
    
    .section {
        padding: 40px 0;
    }
    
    .hero-bg-img-1,
    .hero-bg-img-2 {
        opacity: 0;
    }
    
    .hero-bg-img-1.loaded,
    .hero-bg-img-2.loaded {
        opacity: 0.6;
    }
    
    .section-title {
        font-size: 1.5rem;
        letter-spacing: 2px;
    }
    
    .section-desc {
        font-size: 0.95rem;
        margin-bottom: 24px;
    }
    
    .hero-title h2 {
        font-size: 1.8rem;
    }
    
    .bagua-symbol {
        font-size: 2rem;
        letter-spacing: 6px;
    }
    
    .feature-card {
        padding: 24px 20px;
    }
    
    .feature-icon {
        font-size: 2.2rem;
    }
    
    .hexagrams-grid {
        gap: 12px;
    }
    
    .hexagram-card {
        padding: 16px 12px;
    }
    
    .hexagram-symbol {
        font-size: 2rem;
    }
    
    .hexagram-name {
        font-size: 1.1rem;
    }
    
    .trigram-panel {
        padding: 20px;
    }
    
    .trigram-grid {
        gap: 8px;
    }
    
    .trigram-item {
        padding: 12px 8px;
    }
    
    .trigram-symbol {
        font-size: 1.8rem;
    }
    
    .relation-list {
        gap: 12px;
    }
    
    .relation-item {
        padding: 16px 12px;
    }
    
    .modal-body {
        padding: 24px 16px;
    }
    
    .detail-symbol {
        font-size: 3rem;
    }
    
    .detail-name {
        font-size: 1.6rem;
    }
    
    .modern-section,
    .guidance-section {
        padding: 20px;
    }
    
    .line-item {
        padding: 16px 14px;
    }
}

@media (min-width: 768px) {
    html {
        font-size: 16px;
    }
    
    .container {
        padding: 0 24px;
    }
    
    .header {
        padding: 16px 0;
    }
    
    .logo-icon {
        font-size: 2.2rem;
    }
    
    .logo h1 {
        font-size: 1.4rem;
        letter-spacing: 2px;
    }
    
    .nav {
        position: static;
        background: transparent;
        flex-direction: row;
        padding: 0;
        gap: 8px;
        overflow: visible;
        opacity: 1;
        visibility: visible;
        transform: none;
        pointer-events: auto;
    }
    
    .nav-link {
        padding: 10px 20px;
        font-size: 0.95rem;
        min-height: auto;
        white-space: nowrap;
        overflow: visible;
        text-overflow: clip;
        width: auto;
        max-width: none;
        flex-shrink: 0;
    }
    
    .nav-link:hover {
        color: var(--white);
        background-color: rgba(255, 255, 255, 0.1);
    }
    
    .nav-link::after {
        content: '';
        position: absolute;
        bottom: 6px;
        left: 50%;
        transform: translateX(-50%);
        width: 0;
        height: 2px;
        background: linear-gradient(90deg, var(--gold-color), var(--gold-light));
        transition: var(--transition);
        border-radius: 1px;
    }
    
    .nav-link:hover::after,
    .nav-link.active::after {
        width: 60%;
    }
    
    .mobile-menu-btn {
        display: none;
    }
    
    .main {
        margin-top: 68px;
    }
    
    .section {
        padding: 80px 0;
        min-height: calc(100vh - 68px);
    }
    
    .section-title {
        font-size: 2.2rem;
        letter-spacing: 4px;
        margin-bottom: 16px;
    }
    
    .section-title::before,
    .section-title::after {
        content: '☰';
        font-size: 1rem;
        color: var(--accent-color);
        margin: 0 20px;
        opacity: 0.6;
    }
    
    .section-title::after {
        content: '☷';
    }
    
    .section-desc {
        font-size: 1.05rem;
        margin-bottom: 48px;
    }
    
    .hero-section {
        padding: 60px 0;
    }
    
    .hero-bg-img-1 {
        top: -8%;
        right: -8%;
        width: 48%;
        height: 58%;
    }
    
    .hero-bg-img-2 {
        bottom: -12%;
        left: -5%;
        width: 42%;
        height: 52%;
    }
    
    .bg-img-accent-1,
    .bg-img-accent-2,
    .bg-img-accent-3 {
        opacity: 0;
    }
    
    .bg-img-accent-1.loaded,
    .bg-img-accent-2.loaded,
    .bg-img-accent-3.loaded {
        opacity: 1;
    }
    
    .hero-title {
        margin-bottom: 48px;
    }
    
    .bagua-symbol {
        font-size: 2.8rem;
        letter-spacing: 12px;
        margin-bottom: 24px;
    }
    
    .hero-title h2 {
        font-size: 3.2rem;
        letter-spacing: 8px;
        margin-bottom: 16px;
    }
    
    .subtitle {
        font-size: 1.2rem;
        letter-spacing: 2px;
    }
    
    .hero-features {
        grid-template-columns: repeat(3, 1fr);
        gap: 32px;
        margin-bottom: 48px;
        max-width: 1000px;
        margin-left: auto;
        margin-right: auto;
    }
    
    .feature-card {
        padding: 36px 28px;
    }
    
    .feature-icon {
        font-size: 2.8rem;
        margin-bottom: 16px;
    }
    
    .feature-card h3 {
        font-size: 1.15rem;
        margin-bottom: 12px;
    }
    
    .feature-card p {
        font-size: 0.95rem;
    }
    
    .quick-search {
        flex-direction: row;
        gap: 12px;
        max-width: 520px;
        margin: 0 auto;
    }
    
    .quick-search input {
        flex: 1;
    }
    
    .quick-search button {
        width: auto;
    }
    
    .search-panel {
        margin: 0 auto;
        border-radius: var(--border-radius);
    }
    
    .search-tabs {
        flex-direction: row;
        overflow: visible;
    }
    
    .tab-btn {
        padding: 18px;
        font-size: 0.95rem;
        white-space: normal;
        flex: 1;
    }
    
    .tab-content {
        padding: 36px;
    }
    
    .search-box {
        flex-direction: row;
        gap: 12px;
    }
    
    .search-box select,
    .search-box input {
        padding: 14px 18px;
    }
    
    .search-box button {
        padding: 14px 32px;
        width: auto;
    }
    
    .yao-selector {
        gap: 10px;
        max-width: 320px;
    }
    
    .yao-line {
        padding: 12px 16px;
    }
    
    .yao-label {
        font-size: 0.9rem;
        width: 44px;
    }
    
    .yao-visual {
        font-size: 1.6rem;
    }
    
    .trigram-selector {
        flex-direction: row;
        gap: 40px;
    }
    
    .trigram-panel {
        min-width: 300px;
        padding: 28px;
    }
    
    .trigram-panel h3 {
        font-size: 1.1rem;
        margin-bottom: 20px;
    }
    
    .trigram-grid {
        gap: 12px;
    }
    
    .trigram-item {
        padding: 16px 12px;
    }
    
    .trigram-symbol {
        font-size: 2.2rem;
        margin-bottom: 6px;
    }
    
    .trigram-name {
        font-size: 0.9rem;
    }
    
    .trigram-combine {
        transform: rotate(90deg);
        margin: 20px 0;
    }
    
    .combine-symbol {
        font-size: 2.2rem;
    }
    
    .combined-result {
        margin-top: 48px;
    }
    
    .combine-preview {
        padding: 36px 48px;
        min-width: 320px;
        width: auto;
    }
    
    .hexagram-filter {
        gap: 12px;
        margin-bottom: 24px;
    }
    
    .filter-btn {
        padding: 12px 28px;
        font-size: 0.95rem;
    }
    
    .filter-options {
        gap: 10px;
    }
    
    .filter-option {
        padding: 10px 20px;
        font-size: 0.9rem;
    }
    
    .hexagrams-grid {
        grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
        gap: 24px;
    }
    
    .hexagram-card {
        padding: 24px;
    }
    
    .hexagram-number {
        font-size: 0.8rem;
    }
    
    .hexagram-symbol {
        font-size: 2.4rem;
        margin-bottom: 12px;
    }
    
    .hexagram-name {
        font-size: 1.3rem;
        margin-bottom: 6px;
    }
    
    .hexagram-full-name {
        font-size: 0.85rem;
    }
    
    .relation-selector {
        max-width: 420px;
    }
    
    .relation-selector select {
        padding: 14px 20px;
    }
    
    .relation-graph {
        padding: 48px;
        min-height: 420px;
    }
    
    .graph-placeholder {
        height: 320px;
    }
    
    .relation-center {
        padding: 36px;
        margin-bottom: 36px;
    }
    
    .relation-center .hexagram-symbol {
        font-size: 3.5rem;
        margin-bottom: 12px;
    }
    
    .relation-center .hexagram-name {
        font-size: 1.6rem;
    }
    
    .relation-list {
        grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
        gap: 16px;
    }
    
    .relation-item {
        padding: 24px 16px;
    }
    
    .modal {
        padding: 24px;
        align-items: center;
    }
    
    .modal-content {
        max-width: 840px;
        width: 100%;
        border-radius: var(--border-radius);
    }
    
    .modal-close {
        top: 20px;
        right: 24px;
        font-size: 2rem;
        width: 40px;
        height: 40px;
    }
    
    .modal-body {
        padding: 48px;
        max-height: calc(90vh - 48px);
    }
    
    .detail-header {
        margin-bottom: 36px;
        padding-bottom: 28px;
    }
    
    .detail-symbol {
        font-size: 4.5rem;
        margin-bottom: 20px;
    }
    
    .detail-name {
        font-size: 2.2rem;
        letter-spacing: 4px;
    }
    
    .detail-full-name {
        font-size: 1.15rem;
        margin-bottom: 16px;
    }
    
    .detail-info {
        flex-direction: row;
        justify-content: center;
        gap: 24px;
        flex-wrap: wrap;
        margin-top: 20px;
    }
    
    .info-item {
        font-size: 0.9rem;
        padding: 8px 16px;
    }
    
    .detail-section {
        margin-bottom: 28px;
    }
    
    .detail-section h3 {
        font-size: 1.2rem;
        margin-bottom: 14px;
        padding-left: 18px;
    }
    
    .detail-section p {
        font-size: 1rem;
        line-height: 1.9;
    }
    
    .modern-section {
        padding: 24px;
        margin-bottom: 28px;
    }
    
    .modern-item {
        padding: 16px 20px;
    }
    
    .modern-label {
        font-size: 0.9rem;
        margin-bottom: 8px;
    }
    
    .modern-item p {
        font-size: 1rem;
    }
    
    .guidance-section {
        padding: 24px;
        margin-bottom: 28px;
    }
    
    .guidance-content {
        padding: 20px;
    }
    
    .guidance-content p {
        font-size: 1rem;
    }
    
    .line-item {
        padding: 18px 22px;
        margin-bottom: 12px;
    }
    
    .line-position {
        font-size: 0.95rem;
        margin-bottom: 6px;
    }
    
    .line-text {
        font-size: 1.05rem;
        margin-bottom: 6px;
    }
    
    .line-meaning {
        font-size: 0.9rem;
    }
    
    .line-modern {
        font-size: 0.9rem;
        padding: 10px 12px;
        margin-top: 10px;
    }
    
    .footer {
        padding: 48px 0 24px;
        margin-top: 80px;
    }
    
    .footer-content {
        flex-direction: row;
        justify-content: space-between;
        align-items: flex-start;
        gap: 36px;
        margin-bottom: 32px;
    }
    
    .footer-logo {
        font-size: 1.4rem;
    }
    
    .footer-links {
        gap: 24px;
    }
    
    .footer-links a {
        font-size: 0.95rem;
    }
    
    .footer-copyright {
        padding-top: 24px;
    }
    
    .footer-copyright p {
        font-size: 0.85rem;
    }
    
    .decoration-circle:nth-child(1) {
        width: 400px;
        height: 400px;
        top: -100px;
        right: -100px;
    }
    
    .decoration-circle:nth-child(2) {
        width: 300px;
        height: 300px;
        bottom: -50px;
        left: -50px;
    }
    
    .bagua-wrapper {
        padding: 20px 40px;
    }
    
    .bagua-wrapper::before,
    .bagua-wrapper::after {
        width: 60px;
    }
    
    .bagua-wrapper::before {
        left: -30px;
    }
    
    .bagua-wrapper::after {
        right: -30px;
    }
}

@media (min-width: 992px) {
    .hero-features {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .detail-info {
        flex-wrap: wrap;
        gap: 12px;
    }
    
    .modern-section,
    .guidance-section {
        padding: 20px;
    }
}

@media (hover: hover) {
    .hexagram-card:hover,
    .feature-card:hover,
    .trigram-item:hover,
    .relation-item:hover,
    .line-item:hover {
        transform: translateY(-6px);
        box-shadow: var(--shadow-lg);
    }
    
    .hexagram-card:hover::before {
        opacity: 1;
    }
    
    .feature-card:hover::before {
        opacity: 1;
    }
    
    .feature-card:hover {
        transform: translateY(-8px);
        box-shadow: var(--shadow-lg);
    }
    
    .trigram-item:hover {
        border-color: var(--accent-color);
        background: linear-gradient(135deg, var(--rice-color) 0%, var(--warm-gray) 100%);
        transform: translateY(-3px);
    }
    
    .relation-item:hover {
        background: linear-gradient(135deg, var(--warm-gray) 0%, #ddd5c8 100%);
        transform: translateY(-4px);
        box-shadow: var(--shadow);
        border-color: var(--accent-color);
    }
    
    .line-item:hover {
        background: linear-gradient(135deg, var(--warm-gray) 0%, #ddd5c8 100%);
        border-color: var(--accent-color);
    }
    
    .nav-link:hover {
        background-color: rgba(255, 255, 255, 0.1);
    }
    
    .yao-line:hover {
        background: linear-gradient(135deg, var(--warm-gray) 0%, #ddd5c8 100%);
        border-color: var(--accent-color);
    }
    
    .filter-btn:hover {
        border-color: var(--accent-color);
        background: var(--rice-color);
    }
    
    .filter-option:hover {
        background: var(--rice-color);
        border-color: var(--accent-color);
    }
    
    .quick-search button:hover {
        transform: translateY(-2px);
        box-shadow: 0 6px 20px rgba(123, 158, 137, 0.4);
    }
    
    .search-box button:hover {
        transform: translateY(-2px);
        box-shadow: 0 6px 16px rgba(139, 115, 85, 0.35);
    }
    
    .binary-input-container > button:hover {
        transform: translateY(-2px);
        box-shadow: 0 6px 16px rgba(123, 158, 137, 0.4);
    }
    
    .modal-close:hover {
        color: var(--accent-color);
        background: var(--warm-gray);
    }
}

@media (max-width: 768px) and (orientation: landscape) {
    .modal {
        align-items: center;
    }
    
    .modal-content {
        max-height: 95vh;
        border-radius: var(--border-radius);
        margin: 10px;
    }
    
    .modal-body {
        max-height: calc(95vh - 48px);
    }
    
    .nav {
        padding-bottom: 20px;
    }
    
    .nav-link {
        min-height: 48px;
        padding: 12px 16px;
    }
}

@supports (padding: max(0px)) {
    .header {
        padding-top: max(10px, env(safe-area-inset-top));
    }
    
    .footer {
        padding-bottom: max(20px, env(safe-area-inset-bottom));
    }
    
    .modal-content {
        padding-bottom: max(0px, env(safe-area-inset-bottom));
    }
    
    .nav {
        padding-top: 20px;
        padding-bottom: max(30px, env(safe-area-inset-bottom));
    }
}

::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--rice-color);
}

::-webkit-scrollbar-thumb {
    background: var(--primary-light);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-color);
}

::selection {
    background: var(--accent-color);
    color: var(--white);
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateX(-50%) translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
}

@keyframes slideUp {
    from {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
    to {
        opacity: 0;
        transform: translateX(-50%) translateY(-20px);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(100%);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal.active .modal-content {
    animation: slideInUp 0.3s ease forwards;
}

.notification {
    font-family: var(--font-sans);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .modal.active .modal-content {
        animation: none;
    }
}