/*
* Minimalist Website Template CSS - Milk Tea Color Palette
* 簡約風格網站模板樣式表 - 奶茶色系
* Japanese & European Minimalist Design
* Bootstrap 5 + Custom Styles
* Author: 紀孟勳 (Bryantchi.work@gmail.com)
*/

/* ====== VIBRANT MODERN COLOR PALETTE / 活力現代色彩系統 ====== */
:root {
    /* Core Brand Colors - 核心品牌色彩 */
    --primary: #C7A27A;           /* Milk tea caramel - 奶茶焦糖 */
    --secondary: #A67752;         /* Roasted brown - 焦糖棕 */
    --accent: #F4D9B6;            /* Creamy highlight - 奶霜亮點 */
    --tertiary: #8C5A3E;          /* Toasted cacao - 可可烘焙 */

    /* Neutral Palette - 中性色調 */
    --white: #FFFFFF;             /* Pure white - 純白 */
    --cream: #FBF3E4;             /* Milk foam beige - 奶泡米杏 */
    --light-gray: #E8DCCB;        /* Soft clay - 柔和陶土 */
    --medium-gray: #C5B09A;       /* Warm taupe - 溫柔褐灰 */
    --dark-gray: #7B6654;         /* Toasted walnut - 烘烤胡桃 */
    --charcoal: #3F2E24;          /* Deep mocha - 深色摩卡 */
    --sage: #9FB0A0;              /* Herbal sage - 草本鼠尾草 */
    --cocoa: #B35B3F;             /* Spiced cocoa - 香料可可 */

    /* Extended Colors - 擴展色彩 */
    --forest: #6E4A35;            /* Deep roast - 深焙色 */
    --burgundy: #A65C45;          /* Terracotta blush - 赤陶暖粉 */
    --navy: #4E3727;              /* Dark caramel - 深色焦糖 */
    --gold: #F3E1C7;              /* Honey cream - 蜂蜜奶霜 */
    --lavender: #D7C5B6;          /* Smoky mauve - 迷霧裸粉 */
    --mint: #D8E2D3;              /* Whispering mint - 淡薄荷 */

    /* Semantic Color Mapping - 語意色彩映射 */
    --background: var(--white);
    --background-primary: var(--white);
    --background-secondary: var(--cream);
    --background-soft: var(--light-gray);
    --text-primary: var(--charcoal);
    --text-secondary: var(--dark-gray);
    --border: var(--light-gray);
    --border-color: var(--light-gray);
    --primary-color: var(--primary);
    --secondary-color: var(--secondary);
    --accent-color: var(--accent);

    /* Gradient System - 漸層系統 */
    --gradient-primary: linear-gradient(135deg, var(--primary) 0%, var(--tertiary) 100%);
    --gradient-secondary: linear-gradient(135deg, var(--secondary) 0%, var(--burgundy) 100%);
    --gradient-warm: linear-gradient(135deg, var(--accent) 0%, var(--gold) 100%);
    --gradient-cool: linear-gradient(135deg, var(--sage) 0%, var(--mint) 100%);
    --gradient-subtle: linear-gradient(135deg, var(--white) 0%, var(--cream) 100%);
    --gradient-soft: linear-gradient(135deg, var(--cream) 0%, var(--light-gray) 100%);

    /* Brand Colors - 品牌色彩 */
    --brand-primary: var(--primary);
    --brand-secondary: var(--secondary);
    --brand-accent: var(--accent);

    /* Typography - 日系歐系簡約字體 */
    --font-family-primary: 'Inter', 'Noto Sans TC', 'Hiragino Sans', 'Microsoft JhengHei', sans-serif;
    --font-family-heading: 'Inter', 'Noto Sans TC', 'Hiragino Sans', sans-serif;
    --font-size-base: 1rem;
    --line-height-base: 1.7;
    --letter-spacing-base: 0.02em;

    /* Spacing - 簡約間距系統 */
    --section-padding: 4rem 0;
    --container-padding: 1.5rem;
    --element-gap: 2rem;
    --micro-gap: 0.5rem;

    /* Border Radius - 柔和圓角 */
    --border-radius-sm: 0.25rem;
    --border-radius-md: 0.5rem;
    --border-radius-lg: 1rem;
    --border-radius-xl: 1.5rem;

    /* Shadows - 柔和陰影 */
    --shadow-soft: 0 2px 12px rgba(44, 41, 36, 0.08);
    --shadow-medium: 0 4px 20px rgba(44, 41, 36, 0.12);
    --shadow-strong: 0 8px 32px rgba(44, 41, 36, 0.16);
    --shadow-lg: 0 10px 30px rgba(44, 41, 36, 0.15);
    --shadow-md: 0 5px 15px rgba(44, 41, 36, 0.1);
    --shadow-xl: 0 20px 40px rgba(44, 41, 36, 0.2);

    /* Transitions - 溫和過渡 */
    --transition-gentle: 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --transition-swift: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --transition-base: 0.3s ease;
}

/* ====== BASE STYLES / 基礎樣式 ====== */
* {
    box-sizing: border-box;
}

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

body {
    font-family: var(--font-family-primary);
    line-height: var(--line-height-base);
    letter-spacing: var(--letter-spacing-base);
    color: var(--charcoal);
    background-color: var(--white);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-family-heading);
    font-weight: 400;
    line-height: 1.3;
    margin-bottom: 1rem;
    color: var(--charcoal);
    letter-spacing: 0.01em;
}

h1 { font-size: 2.5rem; font-weight: 300; }
h2 { font-size: 2rem; font-weight: 300; }
h3 { font-size: 1.5rem; font-weight: 400; }
h4 { font-size: 1.25rem; font-weight: 400; }
h5 { font-size: 1.125rem; font-weight: 500; }
h6 { font-size: 1rem; font-weight: 500; }

p {
    margin-bottom: 1.5rem;
    color: var(--dark-gray);
    line-height: 1.8;
}

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

a:hover {
    color: var(--secondary);
    text-decoration: none;
}

img {
    max-width: 100%;
    height: auto;
    border-radius: var(--border-radius-sm);
}

/* ====== MINIMALIST BOOTSTRAP OVERRIDES / 簡約 Bootstrap 客製化 ====== */
.btn {
    font-weight: 400;
    font-size: 0.9rem;
    letter-spacing: 0.02em;
    border-radius: var(--border-radius-lg);
    padding: 0.875rem 2rem;
    transition: all var(--transition-gentle);
    border: 1px solid transparent;
    position: relative;
    overflow: hidden;
}

.btn:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-medium);
}

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

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

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

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

.btn-soft {
    background-color: var(--cream);
    border-color: var(--secondary);
    color: var(--charcoal);
}

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

.btn-lg {
    padding: 1rem 2.5rem;
    font-size: 1rem;
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.85rem;
}

/* ====== MINIMALIST NAVIGATION / 簡約導航列 ====== */
.navbar {
    padding: 1.5rem 0;
    transition: all var(--transition-gentle);
    backdrop-filter: blur(20px);
    z-index: 1030;
    background-color: rgba(255, 255, 255, 0.95);
    border-bottom: 1px solid var(--border);
    position: fixed !important;
    top: 0 !important;
    left: 0;
    right: 0;
    width: 100%;
    /* 注意：移除 translateZ 以避免 iOS/Safari 在隱藏網址列時造成 fixed 元素上移抖動 */
}

.navbar.scrolled {
    background-color: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow-soft);
}

.navbar-brand {
    font-size: 1.5rem;
    font-weight: 300;
    letter-spacing: 0.05em;
    color: var(--charcoal);
    transition: all var(--transition-gentle);
}

.navbar-brand:hover {
    color: var(--primary);
}

.nav-link {
    font-weight: 400;
    font-size: 0.9rem;
    padding: 0.75rem 1.25rem;
    position: relative;
    color: var(--dark-gray);
    transition: all var(--transition-gentle);
    letter-spacing: 0.02em;
}

/* .nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 1px;
    background-color: var(--primary);
    transition: all var(--transition-gentle);
    transform: translateX(-50%);
} */

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

.nav-link:hover::after,
.nav-link.active::after {
    width: 60%;
}

.navbar-toggler {
    border: none;
    padding: 0.25rem 0.5rem;
    background-color: transparent;
}

.navbar-toggler:focus {
    box-shadow: none;
}

.navbar-toggler-icon {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='%239ca394' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='m4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

/* Mobile Offcanvas Menu - 手機版側邊選單 */
.offcanvas-end {
    width: 33.333% !important; /* 設定為螢幕寬度的三分之一 */
    min-width: 280px; /* 最小寬度確保內容可讀性 */
    max-width: 400px; /* 最大寬度避免過寬 */
}

.offcanvas {
    background-color: var(--white);
    backdrop-filter: blur(20px);
    border-left: 1px solid var(--light-gray);
    box-shadow: 0 0 20px rgba(44, 41, 36, 0.1);
}

.offcanvas-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--light-gray);
}

.offcanvas-title {
    font-size: 1.2rem;
    font-weight: 300;
    color: var(--charcoal);
}

.offcanvas .nav-link {
    border-bottom: 1px solid var(--light-gray);
    font-size: 1rem;
    padding: 1rem 1.5rem;
    color: var(--dark-gray);
    transition: all var(--transition-gentle);
}

.offcanvas .nav-link:hover,
.offcanvas .nav-link.active {
    background-color: var(--cream);
    color: var(--primary);
    padding-left: 2rem;
}

/* 小螢幕調整 */
@media (max-width: 480px) {
    .offcanvas-end {
        width: 50% !important; /* 小螢幕時調整為一半寬度 */
        min-width: 250px;
    }
}

/* 手機瀏覽器優化：避免 fixed 導覽列在滾動時位移
   - 移除小螢幕下的 backdrop-filter，減少 Safari/Chrome 行為改變導致的抖動
   - 確保頂部固定不受瀏覽器 UI（網址列）伸縮影響 */
@media (max-width: 767px) {
    .navbar {
        -webkit-backdrop-filter: none;
        backdrop-filter: none;
        will-change: auto;
    }
}

/* ====== MINIMALIST HERO SECTION / 簡約主視覺區 ====== */
.hero-section {
    background: var(--cream);
    position: relative;
    overflow: hidden;
    min-height: 90vh;
    display: flex;
    align-items: center;
    padding-top: 100px;
    padding-bottom: var(--section-padding);
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    /* background: radial-gradient(circle at 30% 20%, rgba(156, 163, 148, 0.05) 0%, transparent 50%),
                radial-gradient(circle at 70% 80%, rgba(156, 163, 148, 0.08) 0%, transparent 50%); */
    opacity: 0.5;
    z-index: 1;
}

.hero-section .container {
    position: relative;
    z-index: 2;
}

.hero-content {
    max-width: 600px;
}

.hero-title {
    font-size: 3rem;
    font-weight: 300;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    color: var(--charcoal);
    letter-spacing: -0.01em;
}

.hero-subtitle {
    font-size: 1.25rem;
    font-weight: 300;
    color: var(--dark-gray);
    margin-bottom: 2rem;
    line-height: 1.6;
}

.hero-image-container {
    position: relative;
    text-align: center;
    overflow: hidden;
}

.hero-image {
    border-radius: var(--border-radius-xl);
    transition: all var(--transition-slow);
    box-shadow: 0 10px 30px rgba(90, 67, 50, 0.15);
    max-width: 85%;
}

.hero-image:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(90, 67, 50, 0.25);
}

.hero-decoration {
    position: absolute;
    top: -30px;
    right: 10px;
    width: 120px;
    height: 120px;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(139, 92, 246, 0.05));
    border-radius: 50%;
    opacity: 0.15;
    z-index: -1;
    animation: gentle-float 4s ease-in-out infinite;
}



/* ====== MINIMALIST CARDS / 簡約卡片 ====== */
.feature-card {
    background: transparent;
    border-radius: var(--border-radius-lg);
    transition: all var(--transition-gentle);
    border: none;
    padding: 2rem 1rem;
}

.feature-card:hover {
    transform: translateY(-5px);
    background-color: var(--cream);
}

.feature-icon {
    transition: all var(--transition-gentle);
}

.feature-card:hover .feature-icon {
    transform: translateY(-3px);
}

.service-card {
    background: var(--white);
    border-radius: var(--border-radius-lg);
    transition: all var(--transition-gentle);
    border: 1px solid var(--light-gray);
}

.service-card:hover {
    transform: translateY(-8px);
    background-color: var(--cream);
    box-shadow: 0 10px 30px rgba(44, 41, 36, 0.15);
    border-color: var(--primary);
}

.service-icon {
    transition: all var(--transition-gentle);
}

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

/* Portfolio Items */
.portfolio-item {
    position: relative;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    transition: all var(--transition-gentle);
    background: var(--white);
    box-shadow: 0 5px 15px rgba(44, 41, 36, 0.1);
}

.portfolio-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 35px rgba(44, 41, 36, 0.2);
}

.portfolio-item img {
    transition: all var(--transition-slow);
    aspect-ratio: 4/3;
    object-fit: cover;
}

.portfolio-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.9) 0%, rgba(139, 92, 246, 0.8) 100%);
    opacity: 0;
    transition: all var(--transition-gentle);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--background-primary);
}

.portfolio-item:hover .portfolio-overlay {
    opacity: 1;
}

.portfolio-item:hover img {
    transform: scale(1.08);
}

/* Contact Info */
.contact-info {
    transition: all var(--transition-gentle);
    border-radius: var(--border-radius-lg);
}

.contact-info:hover {
    transform: translateY(-5px);
    background-color: rgba(254, 253, 248, 0.8);
}

.contact-icon {
    transition: all var(--transition-gentle);
}

.contact-info:hover .contact-icon {
    transform: translateY(-3px);
}

/* ====== SERVICE CARDS / 服務卡片 ====== */
.service-card {
    transition: all var(--transition-base);
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 4px;
    background: var(--gradient-primary);
    transition: all var(--transition-base);
}

.service-card:hover::before {
    left: 0;
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.service-icon {
    transition: all var(--transition-base);
}

.service-card:hover .service-icon {
    transform: scale(1.1);
    color: var(--brand-primary);
}

/* ====== SWIPER CUSTOMIZATION / Swiper 客製化 ====== */
.servicesSwiper {
    padding: 2rem 0 3rem;
}

.servicesSwiper .swiper-pagination-bullet {
    width: 12px;
    height: 12px;
    background-color: var(--brand-primary);
    opacity: 0.3;
    transition: all var(--transition-base);
}

.servicesSwiper .swiper-pagination-bullet-active {
    opacity: 1;
    transform: scale(1.2);
}

.servicesSwiper .swiper-button-next,
.servicesSwiper .swiper-button-prev {
    color: var(--brand-primary);
    background-color: var(--white);
    width: 50px;
    height: 50px;
    border-radius: 50%;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
}

.servicesSwiper .swiper-button-next:hover,
.servicesSwiper .swiper-button-prev:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-lg);
}

.servicesSwiper .swiper-button-next::after,
.servicesSwiper .swiper-button-prev::after {
    font-size: 1.2rem;
    font-weight: 600;
}

/* ====== PORTFOLIO SECTION / 作品集 ====== */
.portfolio-item {
    transition: all var(--transition-base);
    cursor: pointer;
}

.portfolio-item:hover {
    transform: translateY(-5px);
}

.portfolio-item img {
    transition: all var(--transition-slow);
    aspect-ratio: 4/3;
    object-fit: cover;
}

.portfolio-overlay {
    background: rgba(199, 162, 122, 0.9);
    opacity: 0;
    transition: all var(--transition-base);
}

.portfolio-item:hover .portfolio-overlay {
    opacity: 1;
}

.portfolio-item:hover img {
    transform: scale(1.1);
}

/* ====== CONTACT SECTION / 聯絡區 ====== */
.contact-info {
    transition: all var(--transition-base);
}

.contact-info:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.contact-icon {
    transition: all var(--transition-base);
}

.contact-info:hover .contact-icon {
    transform: scale(1.1);
    color: var(--brand-primary);
}

/* ====== BACK TO TOP BUTTON / 回到頂部按鈕 ====== */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    border: none;
    color: var(--white);
    font-size: 1.25rem;
    border-radius: 50%;
    box-shadow: var(--shadow-lg);
    transform: translateY(100px);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    z-index: 1020;
}

.back-to-top.show {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

/* ====== FOOTER / 頁尾 ====== */
footer {
    background-color: var(--navy) !important;
    color: var(--white) !important;
}

footer .social-links a {
    transition: all var(--transition-base);
    display: inline-block;
    color: var(--white) !important;
}

footer .social-links a:hover {
    transform: translateY(-3px);
    color: var(--cream) !important;
}

footer a {
    color: var(--white) !important;
}

footer a:hover {
    color: var(--cream) !important;
}

/* ====== MINIMALIST ANIMATIONS / 簡約動畫 ====== */
@keyframes gentle-float {
    0%, 100% {
        transform: translateY(0px) rotate(0deg);
    }
    50% {
        transform: translateY(-15px) rotate(2deg);
    }
}

@keyframes fade-in-up {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes soft-pulse {
    0%, 100% {
        transform: scale(1);
        opacity: 0.8;
    }
    50% {
        transform: scale(1.02);
        opacity: 1;
    }
}

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

/* Gentle entrance animation */
.fade-in {
    animation: fade-in-up 0.8s ease-out;
}

/* Breathing effect for icons */
.breathing {
    animation: soft-pulse 3s ease-in-out infinite;
}

/* ====== UTILITY CLASSES / 工具類 ====== */
.text-gradient {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.shadow-custom {
    box-shadow: var(--shadow-xl);
}

.border-gradient {
    border: 2px solid transparent;
    background: linear-gradient(var(--white), var(--white)) padding-box,
                var(--gradient-primary) border-box;
}

/* ====== RESPONSIVE DESIGN / 響應式設計 ====== */

/* Large Desktop (1400px+) */
@media (min-width: 1400px) {
    .container,
    .container-lg,
    .container-md,
    .container-sm,
    .container-xl,
    .container-xxl {
        max-width: 1320px;
    }

    .display-4 {
        font-size: 3.5rem;
    }

    .display-5 {
        font-size: 3rem;
    }
}

/* Desktop (1200px - 1399px) */
@media (min-width: 1200px) and (max-width: 1399px) {
    .hero-section {
        min-height: 90vh;
    }

    .display-4 {
        font-size: 3rem;
    }
}

/* Large Tablet (992px - 1199px) */
@media (min-width: 992px) and (max-width: 1199px) {
    .hero-section {
        min-height: 85vh;
        padding-top: 100px;
    }

    .display-4 {
        font-size: 2.5rem;
    }

    .display-5 {
        font-size: 2rem;
    }

    .servicesSwiper .swiper-button-next,
    .servicesSwiper .swiper-button-prev {
        display: none;
    }
}

/* Tablet (768px - 991px) */
@media (min-width: 768px) and (max-width: 991px) {
    .hero-section {
        min-height: 80vh;
        text-align: center;
        padding-top: 120px;
    }

    .display-4 {
        font-size: 2.2rem;
    }

    .display-5 {
        font-size: 1.8rem;
    }

    .btn-lg {
        padding: 0.8rem 1.5rem;
        font-size: 1rem;
    }

    .navbar {
        padding: 0.8rem 0;
    }

    .servicesSwiper .swiper-button-next,
    .servicesSwiper .swiper-button-prev {
        display: none;
    }

    .back-to-top {
        bottom: 1.5rem;
        right: 1.5rem;
        width: 45px;
        height: 45px;
    }
}

/* Mobile Large (576px - 767px) */
@media (min-width: 576px) and (max-width: 767px) {
    .hero-section {
        min-height: 75vh;
        text-align: center;
        padding-top: 100px;
        padding-bottom: 2rem;
    }

    .display-4 {
        font-size: 1.8rem;
    }

    .display-5 {
        font-size: 1.5rem;
    }

    .lead {
        font-size: 1rem;
    }

    .btn {
        padding: 0.6rem 1.2rem;
        font-size: 0.9rem;
    }

    .btn-lg {
        padding: 0.8rem 1.4rem;
        font-size: 0.95rem;
    }

    .navbar-brand {
        font-size: 1.5rem;
    }

    .back-to-top {
        bottom: 1rem;
        right: 1rem;
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }

    .shape {
        display: none;
    }
}

/* Mobile (320px - 575px) */
@media (max-width: 575px) {
    .hero-section {
        min-height: 70vh;
        text-align: center;
        padding: 80px 0 2rem;
    }

    .display-4 {
        font-size: 1.6rem;
        line-height: 1.3;
    }

    .display-5 {
        font-size: 1.4rem;
        line-height: 1.3;
    }

    .lead {
        font-size: 0.95rem;
    }

    .btn {
        padding: 0.6rem 1rem;
        font-size: 0.85rem;
        width: 100%;
        margin-bottom: 0.5rem;
    }

    .btn-lg {
        padding: 0.75rem 1.2rem;
        font-size: 0.9rem;
    }

    .navbar {
        padding: 0.5rem 0;
    }

    .navbar-brand {
        font-size: 1.3rem;
    }

    .container {
        padding: 0 15px;
    }

    .py-5 {
        padding: 3rem 0;
    }

    .back-to-top {
        bottom: 1rem;
        right: 1rem;
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }

    .hero-decoration,
    .shape {
        display: none;
    }

    .offcanvas .nav-link {
        font-size: 1rem;
        padding: 1rem;
    }

    .feature-card,
    .service-card,
    .contact-info {
        margin-bottom: 2rem;
    }

    footer .row > div {
        margin-bottom: 2rem;
    }

    .d-flex.gap-3 {
        flex-direction: column;
        gap: 0.5rem !important;
    }
}

/* Ultra Small Mobile (320px and below) */
@media (max-width: 320px) {
    .display-4 {
        font-size: 1.4rem;
    }

    .display-5 {
        font-size: 1.2rem;
    }

    .btn {
        font-size: 0.8rem;
        padding: 0.5rem 0.8rem;
    }

    .navbar-brand {
        font-size: 1.2rem;
    }

    .container {
        padding: 0 10px;
    }
}

/* ====== HIGH DPI / RETINA DISPLAYS / 高解析度螢幕 ====== */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .hero-image,
    .portfolio-item img {
        image-rendering: -webkit-optimize-contrast;
        image-rendering: crisp-edges;
    }
}

/* ====== PRINT STYLES / 列印樣式 ====== */
@media print {
    .navbar,
    .back-to-top,
    .hero-bg-animation,
    .floating-shapes {
        display: none !important;
    }

    .hero-section {
        background: var(--white) !important;
        color: #000000 !important;
        min-height: auto !important;
        padding: 1rem 0 !important;
    }

    body {
        font-size: 12pt;
        line-height: 1.4;
    }

    h1, h2, h3, h4, h5, h6 {
        color: #000000 !important;
        page-break-after: avoid;
    }

    .container {
        max-width: 100% !important;
    }
}

/* ====== ACCESSIBILITY / 無障礙設計 ====== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }

    .floating-shapes,
    .hero-decoration {
        animation: none !important;
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .btn {
        border-width: 3px;
    }

    .nav-link::after {
        height: 3px;
    }

    .feature-card,
    .service-card,
    .contact-info {
        border-width: 2px;
    }
}

/* Focus states for keyboard navigation */
.btn:focus,
.nav-link:focus,
a:focus {
    outline: 2px solid var(--sage);
    outline-offset: 2px;
}

/* 深色模式已停用，保留單一亮色設計 */