@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+TC:wght@300;400;500;700&family=Noto+Serif+TC:wght@300;400;500;600;700;900&display=swap');

/* ==========================================================================
   瀚周工作室 - V12 中式禪意、水墨留白與古籍宣紙版專用樣式表
   設計哲學：古典東方智庫與精實科學。宣紙信札質地，思源宋體，朱砂印泥紅點綴，竹青墨暈擴散。
   ========================================================================== */

/* 1. 設計系統變數 */
:root {
    /* 色板 */
    --primary-color: #1C1D1F;     /* 深水墨黑：主要標題與字體美學 */
    --secondary-color: #5B7065;   /* 竹青綠：古典雅致點綴與 Hover 高光 */
    --accent-color: #A93224;      /* 朱砂印泥紅：診斷警示與 CTA 玺印紅 */
    --bg-color: #F6F3EB;          /* 仿古宣紙象牙黃：溫潤有溫度的紙質大底色 */
    --text-color: #1C1D1F;        /* 水墨黑內文色 */
    --text-muted: #4B5056;        /* 淡水墨灰輔助文字 */
    --border-color: #DCD6CD;      /* 淡淡的竹絲欄/古籍木質框線 */
    --card-bg: #FCFAF5;           /* 宣紙信箋米白卡片背景 */
    --white: #FFFFFF;
    
    /* 字體 */
    --font-serif: 'Noto Serif TC', 'Noto Serif', serif;
    --font-sans: 'Noto Sans TC', 'Noto Sans', sans-serif;
    
    /* 佈局與過渡 */
    --max-width: 1200px;
    --transition-smooth: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    --transition-fast: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

/* 2. 基礎重設 & 通用樣式 */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

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

body {
    background-color: var(--bg-color);
    font-family: var(--font-sans);
    color: var(--text-color);
    line-height: 1.7;
    overflow-x: hidden;
}

/* 容器與版面結構 */
.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 1.5rem;
}

.max-width-md {
    max-width: 800px;
}

section {
    padding: 7rem 0;
    position: relative;
}

.grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
}

/* 標題與標籤 */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-serif);
    color: var(--primary-color);
    line-height: 1.3;
    font-weight: 700;
}

.section-label {
    display: inline-block;
    font-family: var(--font-sans);
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.15em;
    color: var(--secondary-color);
    margin-bottom: 0.8rem;
    text-transform: uppercase;
}

.section-title {
    font-size: 2.25rem;
    margin-bottom: 1.2rem;
    letter-spacing: -0.02em;
}

.section-desc {
    font-size: 1.1rem;
    color: var(--text-muted);
    max-width: 650px;
    margin-bottom: 3rem;
}

.align-center {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.align-center .section-desc {
    margin-left: auto;
    margin-right: auto;
}

/* 3. 按鈕系統 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.9rem 2rem;
    font-family: var(--font-sans);
    font-size: 0.95rem;
    font-weight: 500;
    text-decoration: none;
    border-radius: 4px;
    border: 1.5px solid transparent;
    transition: var(--transition-smooth);
    cursor: pointer;
    letter-spacing: 0.05em;
}

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

.btn-primary:hover {
    background-color: #8D271B;
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(169, 50, 36, 0.15);
}

.btn-outline {
    border-color: var(--secondary-color);
    color: var(--primary-color);
    background-color: transparent;
}

.btn-outline:hover {
    background-color: rgba(91, 112, 101, 0.08);
    color: var(--primary-color);
    transform: translateY(-2px);
}

.btn-text {
    color: var(--primary-color);
    padding: 0.5rem 1rem;
    background: transparent;
}

.btn-text:hover {
    color: var(--accent-color);
    text-decoration: underline;
}

.btn-block {
    display: block;
    width: 100%;
}

/* 4. 導覽列 (Floating Navbar) */
.navbar-header {
    position: fixed;
    top: 1.25rem;
    left: 1.25rem;
    right: 1.25rem;
    z-index: 1000;
    transition: var(--transition-smooth);
}

.navbar-container {
    max-width: var(--max-width);
    margin: 0 auto;
    background-color: rgba(252, 250, 245, 0.93);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 0.6rem 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: 0 4px 25px rgba(28, 29, 31, 0.04);
}

/* 滾動時導覽列收縮效果 */
.navbar-header.scrolled .navbar-container {
    padding: 0.4rem 1.8rem;
    background-color: rgba(252, 250, 245, 0.98);
    box-shadow: 0 6px 30px rgba(28, 29, 31, 0.08);
    border-color: var(--secondary-color);
}

/* 語系切換按鈕 (V12 禪意直角版) */
.lang-switch-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-color);
    padding: 0.35rem 0.8rem;
    border-radius: 4px;
    font-family: var(--font-sans);
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
    margin-left: 0.8rem;
}

.lang-switch-btn:hover {
    border-color: var(--secondary-color);
    color: var(--secondary-color);
    background: rgba(91, 112, 101, 0.05);
}

.mobile-lang-switch {
    margin-top: 0.5rem;
    align-self: flex-start;
    margin-left: 0;
}

.logo-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    color: var(--primary-color);
}

.logo-svg {
    transition: var(--transition-smooth);
}

.logo-link:hover .logo-svg {
    transform: rotate(15deg);
}

.logo-text {
    display: flex;
    flex-direction: column;
}

.logo-title {
    font-family: var(--font-serif);
    font-size: 1.15rem;
    font-weight: 700;
    letter-spacing: 0.05em;
}

.logo-subtitle {
    font-size: 0.75rem;
    color: var(--text-muted);
    letter-spacing: 0.1em;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.nav-item {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-color);
    text-decoration: none;
    position: relative;
    padding: 0.5rem 0;
    transition: var(--transition-fast);
}

.nav-item::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1.5px;
    background-color: var(--accent-color);
    transition: var(--transition-smooth);
}

.nav-item:hover {
    color: var(--accent-color);
}

.nav-item:hover::after {
    width: 100%;
}

.nav-cta {
    padding: 0.5rem 1.2rem;
    font-size: 0.85rem;
}

/* Mobile Toggle Hamburger */
.mobile-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    flex-direction: column;
    gap: 5px;
    padding: 5px;
}

.hamburger-bar {
    width: 22px;
    height: 2px;
    background-color: var(--primary-color);
    transition: var(--transition-smooth);
}

/* Mobile Nav Dropdown */
.mobile-nav {
    display: none;
    position: fixed;
    top: 5.5rem;
    left: 1.25rem;
    right: 1.25rem;
    background-color: rgba(252, 250, 245, 0.98);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
    z-index: 999;
    box-shadow: 0 10px 25px rgba(28, 29, 31, 0.08);
    flex-direction: column;
    gap: 1.2rem;
}

.mobile-nav.open {
    display: flex;
    animation: fadeInSlideDown 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

.mobile-nav-item {
    font-size: 1.05rem;
    color: var(--text-color);
    text-decoration: none;
    font-weight: 500;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-color);
}

.mobile-cta {
    margin-top: 0.5rem;
}

/* 5. Hero 區 */
.hero-section {
    min-height: 85vh;
    display: flex;
    align-items: center;
    background-color: var(--bg-color);
    padding-top: 10rem;
    padding-bottom: 5rem;
    border-bottom: 1px solid var(--border-color);
}

.hero-container-v12 {
    max-width: var(--max-width);
    margin: 0 auto;
    width: 100%;
}

.hero-grid-v12 {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 3.5rem;
    width: 100%;
}

.hero-left-v12 {
    grid-column: span 8;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    text-align: left;
}

.hero-right-v12 {
    grid-column: span 4;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: flex-start;
}

@media (max-width: 991px) {
    .hero-left-v12 {
        grid-column: span 12;
    }
    .hero-right-v12 {
        grid-column: span 12;
        padding-top: 2rem;
        margin-top: 2rem;
    }
}

.v12-hero-label {
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--accent-color);
    margin-bottom: 1.5rem;
}

.v12-hero-title {
    font-family: var(--font-serif);
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.3;
    letter-spacing: -0.01em;
    color: var(--primary-color);
    margin-bottom: 2rem;
}

.v12-hero-title .accent-text {
    color: var(--accent-color);
}

.v12-hero-subtitle {
    font-size: 1.15rem;
    line-height: 1.8;
    color: var(--text-color);
    max-width: 680px;
    margin-bottom: 3rem;
    opacity: 0.85;
}

.v12-hero-actions {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

/* 禪意書卷今日病理卡 */
.daily-card-v12 {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-left: 3px solid var(--accent-color);
    border-radius: 8px;
    padding: 2.2rem;
    width: 100%;
    transition: var(--transition-smooth);
}

.daily-card-v12:hover {
    border-color: var(--secondary-color);
    box-shadow: 0 12px 30px rgba(91, 112, 101, 0.08);
    transform: translateY(-2px);
}

.daily-card-v12-badge {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--accent-color);
    margin-bottom: 1rem;
}

.daily-card-v12-title {
    font-family: var(--font-serif);
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 1.2rem;
    letter-spacing: -0.01em;
}

.daily-card-v12-body {
    font-size: 0.95rem;
    line-height: 1.7;
    color: var(--text-muted);
}

/* 6. 痛點診斷區 */
.symptoms-section {
    background-color: var(--bg-color);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.symptoms-intro-text {
    max-width: 800px;
    margin: 0 auto 4rem auto;
    text-align: center;
    font-size: 1.1rem;
    color: var(--text-color);
    line-height: 1.8;
}

.checklist-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
}

.checklist-item {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-left: 3px solid var(--accent-color);
    padding: 2rem;
    border-radius: 8px;
    display: flex;
    gap: 1.2rem;
    transition: var(--transition-smooth);
}

.checklist-item:hover {
    border-color: var(--secondary-color);
    box-shadow: 0 10px 25px rgba(91, 112, 101, 0.08);
    transform: translateY(-2px);
}

.checklist-icon {
    flex-shrink: 0;
    margin-top: 0.2rem;
}

.checklist-content h3 {
    font-family: var(--font-serif);
    font-size: 1.2rem;
    margin-bottom: 0.6rem;
    font-weight: 700;
}

.checklist-content p {
    font-size: 0.95rem;
    color: var(--text-muted);
    line-height: 1.6;
}

.symptoms-outro-container {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
    border-top: 1px dashed var(--border-color);
    padding-top: 3rem;
}

.outro-highlight {
    font-family: var(--font-serif);
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--accent-color);
}

/* 7. 瀚周體系區 */
.framework-section {
    background-color: var(--bg-color);
}

.framework-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 5rem;
}

.framework-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-left: 3px solid var(--accent-color);
    border-radius: 8px;
    padding: 2.5rem 2rem;
    transition: var(--transition-smooth);
    display: flex;
    flex-direction: column;
}

.framework-card:hover {
    border-color: var(--secondary-color);
    box-shadow: 0 10px 25px rgba(91, 112, 101, 0.08);
    transform: translateY(-2px);
}

.card-icon-box {
    margin-bottom: 1.5rem;
    display: inline-block;
    transition: var(--transition-smooth);
}

.framework-card:hover .card-icon-box {
    transform: scale(1.1);
}

.framework-card h3 {
    font-family: var(--font-serif);
    font-size: 1.35rem;
    margin-bottom: 0.8rem;
    font-weight: 700;
}

.card-lead {
    font-size: 0.9rem;
    font-style: italic;
    color: var(--accent-color);
    margin-bottom: 1rem;
    line-height: 1.4;
    font-weight: 600;
}

.framework-card p {
    font-size: 0.95rem;
    color: var(--text-muted);
    line-height: 1.6;
}

.system-intro-quote {
    text-align: center;
    margin-bottom: 5rem;
}

.system-intro-quote .quote-text {
    font-family: var(--font-serif);
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary-color);
    position: relative;
    display: inline-block;
    padding: 0 2rem;
}

.interactive-flow-box {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-left: 3px solid var(--accent-color);
    border-radius: 8px;
    padding: 3.5rem 3rem;
}

.flow-title {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    margin-bottom: 2rem;
    text-align: center;
    letter-spacing: 0.05em;
    font-weight: 700;
}

.flow-steps-container {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    margin-bottom: 3.5rem;
}

.flow-stage {
    border-top: 3px solid var(--border-color);
    padding-top: 1.5rem;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.flow-stage.active {
    border-top-color: var(--accent-color);
}

.stage-number {
    font-family: var(--font-serif);
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
    transition: var(--transition-fast);
}

.flow-stage.active .stage-number {
    color: var(--accent-color);
}

.stage-name {
    font-family: var(--font-serif);
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.8rem;
}

.stage-detail {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.6;
    opacity: 0.7;
    transition: var(--transition-smooth);
}

.flow-stage.active .stage-detail {
    opacity: 1;
}

.flow-cta-wrapper {
    text-align: center;
}

/* 8. 關於我區 */
.about-section {
    background-color: var(--bg-color);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

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

.silhouette-box {
    width: 100%;
    max-width: 320px;
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-left: 3px solid var(--accent-color);
    border-radius: 8px;
    padding: 1.5rem;
    text-align: center;
    box-shadow: 0 6px 20px rgba(28, 29, 31, 0.03);
    transition: var(--transition-smooth);
}

.silhouette-box:hover {
    border-color: var(--secondary-color);
    box-shadow: 0 10px 25px rgba(91, 112, 101, 0.08);
}

.portrait-svg {
    display: block;
    margin: 0 auto 1rem auto;
}

.visual-caption {
    font-family: var(--font-serif);
    font-size: 0.85rem;
    font-style: italic;
    color: var(--secondary-color);
}

.about-content {
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.about-lead {
    font-family: var(--font-serif);
    font-size: 1.35rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}

.about-story p {
    margin-bottom: 1.2rem;
    color: var(--text-muted);
}

.credentials-badge {
    display: flex;
    gap: 2rem;
    margin: 2rem 0;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
    padding: 1.5rem 0;
}

.badge-item {
    display: flex;
    flex-direction: column;
}

.badge-num {
    font-family: var(--font-serif);
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--accent-color);
    line-height: 1.2;
}

.badge-txt {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 500;
}

.about-gold-quote {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-color);
    border-left: 3px solid var(--accent-color);
    padding-left: 1.2rem;
    margin: 1.5rem 0 2rem 0;
    line-height: 1.6;
}

.about-framework-philosophy {
    font-size: 0.95rem;
    font-style: italic;
    color: var(--text-muted);
    border-top: 1px dashed var(--border-color);
    padding-top: 1.5rem;
}

/* 9. 部落格區 */
.blog-section {
    background-color: var(--bg-color);
}

.editorial-trust-banner {
    background-color: rgba(91, 112, 101, 0.08);
    color: var(--primary-color);
    border: 1px solid var(--secondary-color);
    border-left: 4px solid var(--accent-color);
    border-radius: 8px;
    padding: 2.5rem;
    text-align: center;
    margin-bottom: 4rem;
}

.trust-banner-text {
    font-family: var(--font-serif);
    font-size: 1.4rem;
    font-weight: 700;
    letter-spacing: 0.05em;
}

.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.blog-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-left: 3px solid var(--accent-color);
    border-radius: 8px;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    transition: var(--transition-smooth);
}

.blog-card:hover {
    border-color: var(--secondary-color);
    box-shadow: 0 10px 25px rgba(91, 112, 101, 0.08);
    transform: translateY(-2px);
}

.blog-meta {
    display: flex;
    justify-content: space-between;
    font-size: 0.8rem;
    color: var(--secondary-color);
    font-weight: 600;
    margin-bottom: 1rem;
}

.blog-card-title {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    line-height: 1.4;
}

.blog-card-title a {
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition-fast);
}

.blog-card-title a:hover {
    color: var(--accent-color);
}

.blog-excerpt {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.6;
    margin-bottom: 1.5rem;
    flex-grow: 1;
}

.read-more {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
}

.read-more:hover {
    color: var(--accent-color);
}

.read-more .arrow {
    transition: var(--transition-fast);
}

.read-more:hover .arrow {
    transform: translateX(4px);
}

/* 10. 行動呼籲與聯絡表單區 */
.contact-section {
    background-color: var(--bg-color);
    border-top: 1px solid var(--border-color);
}

.contact-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-left: 3px solid var(--accent-color);
    border-radius: 8px;
    padding: 4rem 3.5rem;
}

.contact-lead-text {
    text-align: center;
    font-size: 1.15rem;
    font-family: var(--font-serif);
    color: var(--primary-color);
    margin-bottom: 3rem;
}

.diagnosis-form {
    display: flex;
    flex-direction: column;
    gap: 1.8rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.form-group label {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--primary-color);
}

.form-group label .required {
    color: var(--accent-color);
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="tel"],
.form-group textarea {
    font-family: var(--font-sans);
    font-size: 0.95rem;
    padding: 0.85rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(169, 50, 36, 0.15);
}

/* 複選框群組樣式 */
.checkbox-group {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-top: 0.4rem;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-size: 0.9rem;
    cursor: pointer;
    font-weight: 500;
}

.checkbox-label input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: var(--accent-color);
}

.form-submit-box {
    margin-top: 1rem;
}

/* 表單成功送出提示 */
.form-success-message {
    text-align: center;
    padding: 2rem 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

.success-icon {
    animation: pulse 2s infinite;
}

.form-success-message h3 {
    font-size: 1.6rem;
    color: var(--primary-color);
}

.form-success-message p {
    font-size: 1.05rem;
    color: var(--text-muted);
    max-width: 500px;
}

.hidden {
    display: none !important;
}

/* 11. 頁尾 */
.footer {
    background-color: #eae5db;
    color: var(--primary-color);
    padding: 5rem 0 2rem 0;
    font-family: var(--font-sans);
    border-top: 1px solid var(--border-color);
}

.footer-container {
    display: flex;
    justify-content: space-between;
    gap: 4rem;
    margin-bottom: 4rem;
}

.footer-brand {
    max-width: 350px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-family: var(--font-serif);
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 1.2rem;
}

.footer-tagline {
    font-family: var(--font-serif);
    font-size: 0.95rem;
    color: var(--secondary-color);
    font-style: italic;
}

.footer-links {
    display: flex;
    gap: 5rem;
}

.footer-link-group {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.footer-link-group h4 {
    color: var(--secondary-color);
    font-size: 0.9rem;
    letter-spacing: 0.1em;
    margin-bottom: 0.5rem;
    text-transform: uppercase;
}

.footer-link-group a,
.footer-link-group span {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    transition: var(--transition-fast);
}

.footer-link-group a:hover {
    color: var(--accent-color);
}

.footer-bottom {
    border-top: 1px solid rgba(28, 29, 31, 0.08);
    padding-top: 2rem;
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* 12. 動畫定義 */
@keyframes fadeInSlideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
    100% {
        transform: scale(1);
    }
}

/* 13. 響應式佈局斷點 (Responsive Design) */

@media (max-width: 1024px) {
    .grid-2 {
        gap: 2rem;
    }
    
    .hero-title {
        font-size: 2.8rem;
    }
    
    .flow-steps-container {
        grid-template-columns: repeat(2, 1fr);
        gap: 2rem;
    }
}

@media (max-width: 768px) {
    section {
        padding: 5rem 0;
    }
    
    .grid-2 {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .nav-menu {
        display: none;
    }
    
    .mobile-toggle {
        display: flex;
    }
    
    .hero-section {
        min-height: auto;
        padding-top: 7rem;
    }
    
    .hero-title {
        font-size: 2.25rem;
    }
    
    .hero-subtitle {
        font-size: 1.25rem;
    }
    
    .hero-actions {
        flex-direction: column;
        align-items: stretch;
        gap: 1rem;
    }
    
    .hero-actions .btn {
        width: 100%;
    }
    
    .checklist-grid {
        grid-template-columns: 1fr;
    }
    
    .flow-steps-container {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .flow-stage {
        border-top: none;
        border-left: 3px solid var(--border-color);
        padding-top: 0;
        padding-left: 1.5rem;
    }
    
    .flow-stage.active {
        border-left-color: var(--accent-color);
    }
    
    .about-visual {
        order: 2;
    }
    
    .about-content {
        order: 1;
    }
    
    .contact-card {
        padding: 2.5rem 1.5rem;
    }
    
    .checkbox-group {
        grid-template-columns: 1fr;
    }
    
    .footer-container {
        flex-direction: column;
        gap: 3rem;
    }
    
    .footer-links {
        flex-direction: column;
        gap: 2rem;
    }
}

@media (max-width: 480px) {
    .stage-name {
        font-size: 0.95rem;
    }
    
    .section-title {
        font-size: 1.75rem;
    }
}

/* ==========================================================================
   V7 專屬層疊卡片 (Stacking Cards Layout) 與細線高亮樣式
   ========================================================================== */

.stacking-card-container {
    display: flex;
    flex-direction: column;
    gap: 4rem;
    padding-bottom: 6rem;
    position: relative;
    max-width: 900px;
    margin: 4rem auto 0 auto;
}

.stacking-card {
    position: sticky;
    top: 140px; /* 黏附在頂部以下，留出 Navbar 空間 */
    background: var(--card-bg);
    border: 1.5px solid var(--border-color);
    border-radius: 16px;
    padding: 3.5rem;
    box-shadow: 0 10px 40px rgba(142, 124, 106, 0.05);
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), filter 0.4s, border-color 0.3s;
    transform-origin: center top;
}

.stacking-card:hover {
    border-color: var(--secondary-color);
    box-shadow: 0 15px 45px rgba(142, 124, 106, 0.1);
}

.stacking-card h3 {
    font-size: 1.6rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
    font-family: var(--font-serif);
}

.stacking-card p {
    font-size: 1.05rem;
    color: var(--text-muted);
    line-height: 1.7;
}

.stacking-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.stacking-card-badge {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--accent-color);
    border: 1px solid rgba(5, 150, 105, 0.2);
    padding: 0.25rem 0.6rem;
    border-radius: 50px;
    background-color: rgba(5, 150, 105, 0.05);
}

.stacking-card-num {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--border-color);
}

/* 為了讓堆疊卡片有不同的頂部 offset，我們可以用 nth-child 設定稍微不同的 top offset，造成露出的梯形重疊感 */
.stacking-card:nth-child(1) { top: 140px; }
.stacking-card:nth-child(2) { top: 165px; }
.stacking-card:nth-child(3) { top: 190px; }
.stacking-card:nth-child(4) { top: 215px; }
.stacking-card:nth-child(5) { top: 240px; }
.stacking-card:nth-child(6) { top: 265px; }

/* 關於我與解法區的微調 */
.typography-hero-title {
    font-size: 3.5rem;
    line-height: 1.25;
    font-family: var(--font-serif);
    font-weight: 900;
    letter-spacing: -0.02em;
    margin-bottom: 2rem;
}

.typography-highlight {
    background: linear-gradient(120deg, rgba(5, 150, 105, 0.1) 0%, rgba(5, 150, 105, 0.1) 100%);
    background-repeat: no-repeat;
    background-size: 100% 40%;
    background-position: 0 80%;
}

.editorial-block-v7 {
    border-left: 2px solid var(--accent-color);
    padding-left: 1.5rem;
    margin-bottom: 3rem;
    max-width: 800px;
}

/* ==========================================================================
   V10 專屬黑白高對比徽章與網格樣式
   ========================================================================== */

.monogram-container {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 2.5rem;
}

.monogram-seal-img,
.monogram-seal-svg {
    transition: var(--transition-smooth);
    cursor: pointer;
}

.monogram-container:hover .monogram-seal-img,
.monogram-container:hover .monogram-seal-svg {
    transform: scale(1.03);
}

.logo-img {
    object-fit: contain;
    transition: var(--transition-fast);
}

.logo-link:hover .logo-img {
    transform: scale(1.05);
}

/* ==========================================================================
   V10 專屬症狀診斷區標頭 (Symptoms Header) 樣式
   ========================================================================== */
.symptoms-header-v10 {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    border-bottom: 2px solid var(--primary-color);
    padding-bottom: 1rem;
    margin-bottom: 3rem;
}

.symptoms-header-left-v10 {
    display: flex;
    flex-direction: column;
}

.symptoms-header-right-v10 {
    font-size: 0.9rem;
    color: var(--accent-color);
    font-family: var(--font-sans);
    font-weight: 700;
    padding-bottom: 0.2rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

@media (max-width: 768px) {
    .symptoms-header-v10 {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
        padding-bottom: 1rem;
    }
}

/* ==========================================================================
   V12 專屬中式水墨柔和淡入動效 (Zen Scroll Fade-in)
   ========================================================================== */
.zen-fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 1s cubic-bezier(0.16, 1, 0.3, 1), transform 1s cubic-bezier(0.16, 1, 0.3, 1);
}

.zen-fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}