/* =============================================
   Salmon4neko Studio — 品牌網站樣式（亮色系）
   框架：Tocas UI 5.0  ·  自訂樣式覆寫
   ============================================= */

/* ---- 設計 Token ---- */
:root {
    --s4n-salmon:      #ff6310;
    --s4n-salmon-lt:   #fd7c47;
    --s4n-salmon-dk:   #d94f00;
    --s4n-salmon-pale: #fff3ed;
    --s4n-salmon-bg:   #fef8f5;

    --s4n-white:       #ffffff;
    --s4n-bg:          #ffffff;
    --s4n-bg-alt:      #f8f9fb;
    --s4n-bg-card:     #ffffff;
    --s4n-border:      rgba(0,0,0,0.08);
    --s4n-border-md:   rgba(0,0,0,0.12);

    --s4n-text:        #111518;
    --s4n-text-2:      #687279;
    --s4n-text-light:  #9aa3a9;

    --s4n-radius-sm:   8px;
    --s4n-radius:      14px;
    --s4n-radius-lg:   20px;
    --s4n-transition:  0.25s cubic-bezier(0.4,0,0.2,1);
    --s4n-shadow-sm:   0 2px 8px rgba(0,0,0,0.06);
    --s4n-shadow:      0 4px 20px rgba(0,0,0,0.08);
    --s4n-shadow-lg:   0 12px 40px rgba(0,0,0,0.12);
    --s4n-font:        'Noto Sans TC', system-ui, sans-serif;
}

/* ---- 全域重設 ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

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

body {
    font-family: var(--s4n-font);
    background: var(--s4n-bg);
    color: var(--s4n-text);
    line-height: 1.7;
    overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }

/* =============================================
   通用容器
   ============================================= */
.s4n-container {
    max-width: 1140px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* =============================================
   通用按鈕
   ============================================= */
.s4n-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    padding: 0.7rem 1.75rem;
    font-size: 0.9375rem;
    font-weight: 600;
    border-radius: var(--s4n-radius-sm);
    border: 2px solid transparent;
    cursor: pointer;
    text-decoration: none;
    transition: background var(--s4n-transition), color var(--s4n-transition),
                border-color var(--s4n-transition), transform var(--s4n-transition),
                box-shadow var(--s4n-transition);
    line-height: 1.2;
    white-space: nowrap;
    vertical-align: middle;
}
.s4n-btn:hover { transform: translateY(-2px); }

.s4n-btn-primary {
    background: var(--s4n-salmon);
    color: #fff;
    border-color: var(--s4n-salmon);
}
.s4n-btn-primary:hover {
    background: var(--s4n-salmon-dk);
    border-color: var(--s4n-salmon-dk);
    box-shadow: 0 6px 20px rgba(255,99,16,0.35);
}

.s4n-btn-ghost {
    background: transparent;
    color: var(--s4n-text-2);
    border-color: var(--s4n-border-md);
}
.s4n-btn-ghost:hover {
    background: var(--s4n-bg-alt);
    color: var(--s4n-text);
    border-color: var(--s4n-border-md);
}

.s4n-btn-white {
    background: #fff;
    color: var(--s4n-salmon-dk);
    border-color: #fff;
}
.s4n-btn-white:hover {
    background: var(--s4n-salmon-pale);
    box-shadow: 0 6px 20px rgba(0,0,0,0.15);
}

.s4n-btn-outline-white {
    background: transparent;
    color: #fff;
    border-color: rgba(255,255,255,0.5);
}
.s4n-btn-outline-white:hover {
    background: rgba(255,255,255,0.15);
    border-color: #fff;
}

.s4n-btn-fluid { width: 100%; }

/* =============================================
   導航列
   ============================================= */
.s4n-header {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 1000;
    background: rgba(255,255,255,0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--s4n-border);
    transition: background var(--s4n-transition), box-shadow var(--s4n-transition);
}

.s4n-header.is-scrolled {
    background: rgba(255,255,255,0.97);
    box-shadow: 0 2px 16px rgba(0,0,0,0.08);
}

.s4n-nav-inner {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0 1.5rem;
    height: 64px;
    max-width: 1140px;
    margin: 0 auto;
}

/* LOGO 圖片 */
.s4n-logo {
    display: flex;
    align-items: center;
    flex-shrink: 0;
    transition: opacity var(--s4n-transition);
}
.s4n-logo:hover { opacity: 0.75; }

.s4n-logo-img {
    height: 44px;
    width: auto;
    display: block;
}

.s4n-nav-links {
    display: flex;
    align-items: center;
    gap: 0.125rem;
    margin-left: auto;
}

.s4n-nav-link {
    padding: 0.4rem 0.75rem;
    border-radius: var(--s4n-radius-sm);
    font-size: 0.875rem;
    color: var(--s4n-text-2);
    transition: color var(--s4n-transition), background var(--s4n-transition);
}
.s4n-nav-link:hover,
.s4n-nav-link.is-active {
    color: var(--s4n-salmon);
    background: var(--s4n-salmon-pale);
}

/* 導航 CTA 按鈕 */
.s4n-cta-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.45rem 1.1rem;
    background: var(--s4n-salmon);
    color: #fff;
    font-size: 0.8125rem;
    font-weight: 600;
    border-radius: var(--s4n-radius-sm);
    line-height: 1.2;
    white-space: nowrap;
    transition: background var(--s4n-transition), transform var(--s4n-transition);
    flex-shrink: 0;
}
.s4n-cta-btn:hover {
    background: var(--s4n-salmon-dk);
    transform: translateY(-1px);
}

/* 漢堡按鈕 */
.s4n-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.25rem;
    flex-shrink: 0;
}
.s4n-menu-toggle span {
    display: block;
    width: 22px; height: 2px;
    background: var(--s4n-text-2);
    border-radius: 2px;
    transition: transform var(--s4n-transition), opacity var(--s4n-transition);
}
.s4n-menu-toggle.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.s4n-menu-toggle.is-open span:nth-child(2) { opacity: 0; }
.s4n-menu-toggle.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* 手機選單 */
.s4n-mobile-menu {
    display: none;
    flex-direction: column;
    gap: 0.25rem;
    padding: 0.75rem 1.5rem 1rem;
    border-top: 1px solid var(--s4n-border);
    background: var(--s4n-white);
}
.s4n-mobile-menu.is-open { display: flex; }

.s4n-mobile-link {
    padding: 0.6rem 0.75rem;
    border-radius: var(--s4n-radius-sm);
    color: var(--s4n-text-2);
    font-size: 0.9rem;
    transition: color var(--s4n-transition), background var(--s4n-transition);
}
.s4n-mobile-link:hover {
    color: var(--s4n-salmon);
    background: var(--s4n-salmon-pale);
}

.s4n-mobile-cta {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 0.5rem;
    padding: 0.7rem;
    background: var(--s4n-salmon);
    color: #fff;
    font-weight: 600;
    font-size: 0.875rem;
    border-radius: var(--s4n-radius-sm);
    line-height: 1.2;
    transition: background var(--s4n-transition);
}
.s4n-mobile-cta:hover { background: var(--s4n-salmon-dk); }

/* =============================================
   Hero 區塊
   ============================================= */
.s4n-hero {
    position: relative;
    min-height: 100dvh;
    display: flex;
    align-items: center;
    overflow: hidden;
    padding-top: 64px;
    background: var(--s4n-white);
}

.s4n-hero-bg {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 55% 50% at 80% 40%, rgba(255,99,16,0.08) 0%, transparent 65%),
        radial-gradient(ellipse 40% 35% at 10% 70%, rgba(255,99,16,0.05) 0%, transparent 60%);
    pointer-events: none;
}

.s4n-hero .s4n-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    padding-top: 4rem;
    padding-bottom: 4rem;
}

.s4n-hero-content { max-width: 540px; }

.s4n-hero-badge {
    display: inline-block;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin-bottom: 1.25rem;
    background: var(--s4n-salmon-pale);
    color: var(--s4n-salmon);
    border: 1px solid rgba(255,99,16,0.2);
    padding: 0.3rem 0.8rem;
    border-radius: 999px;
}

.s4n-hero-title {
    font-size: clamp(2rem, 4.5vw, 3.25rem);
    font-weight: 900;
    line-height: 1.1;
    letter-spacing: -0.03em;
    color: var(--s4n-text);
    margin-bottom: 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.s4n-hero-subtitle {
    font-size: 0.55em;
    font-weight: 500;
    color: var(--s4n-salmon);
    letter-spacing: 0.05em;
}

.s4n-hero-desc {
    color: var(--s4n-text-2);
    font-size: 1.0625rem;
    line-height: 1.8;
    margin-bottom: 2rem;
}

.s4n-hero-actions {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

/* Hero 視覺裝飾 */
.s4n-hero-visual {
    position: relative;
    height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.s4n-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(50px);
    animation: float 6s ease-in-out infinite;
}
.s4n-orb-1 {
    width: 280px; height: 280px;
    background: rgba(255,99,16,0.12);
    top: 5%; left: 5%;
    animation-delay: 0s;
}
.s4n-orb-2 {
    width: 200px; height: 200px;
    background: rgba(253,124,71,0.1);
    bottom: 10%; right: 5%;
    animation-delay: -2s;
}
.s4n-orb-3 {
    width: 140px; height: 140px;
    background: rgba(255,99,16,0.08);
    top: 50%; left: 50%;
    transform: translate(-50%,-50%);
    animation-delay: -4s;
}

.s4n-hero-logo-wrap {
    position: relative;
    z-index: 1;
    animation: fishFloat 4s ease-in-out infinite;
    filter: drop-shadow(0 8px 32px rgba(255,99,16,0.25));
}

.s4n-hero-logo-icon {
    width: 240px;
    height: 240px;
    object-fit: contain;
    display: block;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50%       { transform: translateY(-16px); }
}
@keyframes fishFloat {
    0%, 100% { transform: translateY(0) rotate(-3deg); }
    50%       { transform: translateY(-16px) rotate(3deg); }
}

/* 滾動提示 */
.s4n-scroll-hint {
    position: absolute;
    bottom: 2rem; left: 50%;
    transform: translateX(-50%);
    color: var(--s4n-text-light);
    animation: bounce 2s ease-in-out infinite;
    font-size: 1.2rem;
}
@keyframes bounce {
    0%, 100% { transform: translateX(-50%) translateY(0); opacity: 0.5; }
    50%       { transform: translateX(-50%) translateY(8px); opacity: 1; }
}

/* =============================================
   通用區塊
   ============================================= */
.s4n-section { padding: 5rem 0; background: var(--s4n-bg); }
.s4n-section-alt { background: var(--s4n-bg-alt); }
.s4n-section-salmon {
    background: linear-gradient(135deg, var(--s4n-salmon) 0%, var(--s4n-salmon-lt) 100%);
}

.s4n-section-label {
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--s4n-salmon);
    margin-bottom: 0.75rem;
}

.s4n-label-white { color: rgba(255,255,255,0.75); }

.s4n-section-title {
    font-size: clamp(1.75rem, 4vw, 2.75rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.15;
    margin-bottom: 1rem;
    color: var(--s4n-text);
}

.s4n-title-white { color: #fff; }

.s4n-section-lead {
    font-size: 1.0625rem;
    color: var(--s4n-text-2);
    max-width: 560px;
    margin-bottom: 3rem;
    line-height: 1.8;
}

.s4n-lead-white { color: rgba(255,255,255,0.85); max-width: 600px; }

/* =============================================
   關於我們
   ============================================= */
.s4n-about-box {
    background: var(--s4n-white) !important;
    border: 1px solid var(--s4n-border) !important;
    border-radius: var(--s4n-radius) !important;
    box-shadow: var(--s4n-shadow-sm) !important;
}

.s4n-about-text {
    color: var(--s4n-text-2);
    line-height: 1.9;
    margin-bottom: 1rem;
}
.s4n-about-text:last-child { margin-bottom: 0; }

.s4n-link {
    color: var(--s4n-salmon);
    text-decoration: underline;
    text-decoration-color: rgba(255,99,16,0.3);
    text-underline-offset: 3px;
    transition: color var(--s4n-transition);
}
.s4n-link:hover { color: var(--s4n-salmon-dk); }

/* 統計卡片 */
.s4n-stat-box {
    background: var(--s4n-white) !important;
    border: 1px solid var(--s4n-border) !important;
    border-radius: var(--s4n-radius) !important;
    box-shadow: var(--s4n-shadow-sm) !important;
    height: 100%;
    transition: border-color var(--s4n-transition), transform var(--s4n-transition), box-shadow var(--s4n-transition) !important;
}
.s4n-stat-box:hover {
    border-color: rgba(255,99,16,0.3) !important;
    transform: translateY(-5px) !important;
    box-shadow: var(--s4n-shadow-lg) !important;
}

.s4n-stat-value {
    font-size: 1.1rem !important;
    font-weight: 800 !important;
    color: var(--s4n-salmon) !important;
}

.s4n-stat-label {
    font-size: 0.8rem;
    color: var(--s4n-text-light);
    margin-top: 0.25rem;
}

/* =============================================
   服務卡片
   ============================================= */
.s4n-service-card {
    background: var(--s4n-white) !important;
    border: 1px solid var(--s4n-border) !important;
    border-radius: var(--s4n-radius) !important;
    box-shadow: var(--s4n-shadow-sm) !important;
    height: 100%;
    transition: border-color var(--s4n-transition), transform var(--s4n-transition), box-shadow var(--s4n-transition) !important;
    cursor: default;
}
.s4n-service-card:hover {
    border-color: rgba(255,99,16,0.3) !important;
    transform: translateY(-5px) !important;
    box-shadow: var(--s4n-shadow-lg) !important;
}

.s4n-service-icon {
    font-size: 2rem;
    margin-bottom: 0.875rem;
    display: block;
    line-height: 1;
}

.s4n-service-title {
    color: var(--s4n-text) !important;
    font-size: 1rem !important;
    margin-bottom: 0.5rem !important;
}

.s4n-service-desc {
    color: var(--s4n-text-2);
    font-size: 0.875rem;
    line-height: 1.7;
    margin: 0;
}

.s4n-services-cta {
    text-align: center;
    margin-top: 2.5rem;
}

/* =============================================
   夥伴組織
   ============================================= */
.s4n-partner-card {
    display: block !important;
    background: var(--s4n-white) !important;
    border: 1px solid var(--s4n-border) !important;
    border-radius: var(--s4n-radius) !important;
    box-shadow: var(--s4n-shadow-sm) !important;
    height: 100%;
    transition: border-color var(--s4n-transition), transform var(--s4n-transition), box-shadow var(--s4n-transition) !important;
}
.s4n-partner-card:hover {
    border-color: rgba(255,99,16,0.3) !important;
    transform: translateY(-5px) !important;
    box-shadow: var(--s4n-shadow-lg) !important;
}

.s4n-partner-self {
    background: var(--s4n-salmon-pale) !important;
    border-color: rgba(255,99,16,0.15) !important;
}

.s4n-partner-tag {
    display: inline-block;
    font-size: 0.7rem;
    font-weight: 600;
    border-radius: 999px;
    padding: 0.2rem 0.65rem;
    margin-bottom: 0.75rem;
    letter-spacing: 0.04em;
}
.s4n-tag-default  { background: var(--s4n-bg-alt); color: var(--s4n-text-2); border: 1px solid var(--s4n-border); }
.s4n-tag-secondary{ background: #f0f4ff;            color: #4f6fd4;            border: 1px solid #d0dbff; }
.s4n-tag-accent   { background: var(--s4n-salmon-pale); color: var(--s4n-salmon); border: 1px solid rgba(255,99,16,0.25); }

.s4n-partner-name {
    font-size: 1.25rem !important;
    font-weight: 700 !important;
    color: var(--s4n-text) !important;
    margin-bottom: 0.5rem !important;
}

.s4n-partner-desc {
    color: var(--s4n-text-2);
    font-size: 0.875rem;
    line-height: 1.7;
    margin-bottom: 1rem;
}

.s4n-partner-link {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    font-size: 0.8125rem;
    color: var(--s4n-salmon);
    opacity: 0.8;
    transition: opacity var(--s4n-transition);
    font-weight: 500;
}
.s4n-partner-card:hover .s4n-partner-link { opacity: 1; }

/* =============================================
   聯絡我們
   ============================================= */
.s4n-contact-links {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    height: 100%;
}

.s4n-contact-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.25rem;
    background: rgba(255,255,255,0.15);
    border: 1px solid rgba(255,255,255,0.25);
    border-radius: var(--s4n-radius);
    transition: background var(--s4n-transition), transform var(--s4n-transition);
}
.s4n-contact-item:hover {
    background: rgba(255,255,255,0.25);
    transform: translateX(4px);
}

.s4n-contact-item-icon { font-size: 1.5rem; flex-shrink: 0; }
.s4n-contact-item-info { flex: 1; }
.s4n-contact-item-title { font-size: 0.8rem; color: rgba(255,255,255,0.7); margin-bottom: 0.15rem; }
.s4n-contact-item-value { font-size: 0.9375rem; font-weight: 600; color: #fff; }
.s4n-contact-arrow { color: rgba(255,255,255,0.7); font-size: 0.9rem; }

/* 讓聯絡區塊的兩欄等高 */
.s4n-contact-grid.ts-grid { align-items: stretch !important; }
.s4n-contact-grid .column { display: flex; flex-direction: column; }

.s4n-contact-cta-box {
    background: rgba(255,255,255,0.15);
    border: 1px solid rgba(255,255,255,0.25);
    border-radius: var(--s4n-radius);
    padding: 1.75rem;
    height: 100%;
    backdrop-filter: blur(8px);
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.s4n-cta-title {
    color: #fff;
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
}

.s4n-cta-text {
    color: rgba(255,255,255,0.8);
    font-size: 0.875rem;
    line-height: 1.7;
    margin-bottom: 1.5rem;
}

/* =============================================
   頁面 Hero（服務頁）
   ============================================= */
.s4n-page-hero {
    position: relative;
    padding: 7rem 0 5rem;
    margin-top: 64px;
    background: linear-gradient(135deg, var(--s4n-salmon) 0%, var(--s4n-salmon-lt) 60%, #ff9f6b 100%);
    overflow: hidden;
}

.s4n-page-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 60% 70% at 80% 20%, rgba(255,255,255,0.12) 0%, transparent 65%),
        radial-gradient(ellipse 40% 50% at 10% 90%, rgba(0,0,0,0.08) 0%, transparent 55%);
    pointer-events: none;
}

.s4n-page-hero-inner {
    position: relative;
    z-index: 1;
    text-align: center;
}

.s4n-page-hero .s4n-section-label {
    color: rgba(255,255,255,0.75);
}

.s4n-page-hero-title {
    font-size: clamp(2.25rem, 5vw, 3.5rem);
    font-weight: 900;
    letter-spacing: -0.03em;
    color: var(--s4n-text);
    margin-bottom: 1rem;
}

.s4n-page-hero .s4n-page-hero-title {
    color: #fff;
    line-height: 1.1;
}

.s4n-page-hero-desc {
    font-size: 1.0625rem;
    color: var(--s4n-text-2);
    line-height: 1.8;
}

.s4n-page-hero .s4n-page-hero-desc {
    color: rgba(255,255,255,0.85);
}

/* =============================================
   服務詳情佈局（服務頁）
   ============================================= */
.s4n-service-detail-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 5rem;
    align-items: center;
}

.s4n-service-reverse {
    grid-template-areas: "visual content";
}
.s4n-service-reverse .s4n-service-detail-visual { grid-area: visual; }
.s4n-service-reverse .s4n-service-detail-content { grid-area: content; }

.s4n-service-detail-visual {
    display: flex;
    align-items: center;
    justify-content: center;
}

.s4n-service-icon-wrap {
    font-size: 8rem;
    line-height: 1;
    filter: drop-shadow(0 4px 16px rgba(255,99,16,0.2));
    animation: floatSlow 5s ease-in-out infinite;
}
@keyframes floatSlow {
    0%, 100% { transform: translateY(0); }
    50%       { transform: translateY(-12px); }
}

.s4n-highlight { color: var(--s4n-salmon); }

.s4n-feature-list {
    list-style: none;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem 1rem;
    margin: 1.5rem 0 2rem;
}

.s4n-feature-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    color: var(--s4n-text-2);
}

.s4n-feature-check {
    width: 20px; height: 20px;
    background: var(--s4n-salmon);
    color: #fff;
    border-radius: 50%;
    font-size: 0.65rem;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-weight: 700;
}

.s4n-service-note {
    font-size: 0.875rem;
    color: var(--s4n-text-2);
    line-height: 1.7;
    margin-bottom: 1.5rem;
    padding: 1rem 1.25rem;
    background: var(--s4n-bg-alt);
    border-left: 3px solid var(--s4n-salmon);
    border-radius: 0 var(--s4n-radius-sm) var(--s4n-radius-sm) 0;
}

/* CTA 居中（服務頁底部） */
.s4n-cta-center { text-align: center; }
.s4n-cta-center .s4n-section-title { margin: 0 auto 1rem; }
.s4n-cta-center .s4n-section-lead { margin: 0 auto 2.5rem; }

.s4n-cta-actions {
    display: flex;
    gap: 0.75rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* =============================================
   頁尾
   ============================================= */
.s4n-footer {
    background: var(--s4n-bg-alt);
    border-top: 1px solid var(--s4n-border);
    padding: 2.5rem 0;
}

.s4n-footer-inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.25rem;
    text-align: center;
}

.s4n-footer-logo {
    height: 38px;
    width: auto;
    display: block;
    opacity: 0.75;
    transition: opacity var(--s4n-transition);
}
.s4n-footer-logo:hover { opacity: 1; }

.s4n-footer-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 0.25rem;
    justify-content: center;
}
.s4n-footer-nav a {
    padding: 0.3rem 0.6rem;
    font-size: 0.8125rem;
    color: var(--s4n-text-2);
    border-radius: 6px;
    transition: color var(--s4n-transition), background var(--s4n-transition);
}
.s4n-footer-nav a:hover {
    color: var(--s4n-salmon);
    background: var(--s4n-salmon-pale);
}

.s4n-footer-copy {
    font-size: 0.75rem;
    color: var(--s4n-text-light);
}

.s4n-footer-social {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.s4n-social-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--s4n-bg);
    border: 1px solid var(--s4n-border-md);
    color: var(--s4n-text-2);
    transition: background var(--s4n-transition), color var(--s4n-transition),
        border-color var(--s4n-transition), transform var(--s4n-transition);
}

.s4n-social-btn:hover {
    background: var(--s4n-salmon);
    color: #fff;
    border-color: var(--s4n-salmon);
    transform: translateY(-2px);
}

/* =============================================
   進場動畫
   ============================================= */
.s4n-fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.55s ease, transform 0.55s ease;
}
.s4n-fade-in.is-visible {
    opacity: 1;
    transform: translateY(0);
}
.s4n-fade-in:nth-child(2) { transition-delay: 0.08s; }
.s4n-fade-in:nth-child(3) { transition-delay: 0.16s; }
.s4n-fade-in:nth-child(4) { transition-delay: 0.24s; }
.s4n-fade-in:nth-child(5) { transition-delay: 0.32s; }
.s4n-fade-in:nth-child(6) { transition-delay: 0.40s; }

/* =============================================
   Tocas UI 覆寫
   ============================================= */
.ts-box {
    background: var(--s4n-white) !important;
    border: 1px solid var(--s4n-border) !important;
    border-radius: var(--s4n-radius) !important;
    box-shadow: var(--s4n-shadow-sm) !important;
}

.ts-content { padding: 1.5rem !important; }
.ts-header { color: var(--s4n-text) !important; }
.ts-statistic .value { color: var(--s4n-salmon) !important; }

.ts-grid.is-relaxed { gap: 1.5rem !important; }

/* =============================================
   響應式
   ============================================= */
@media (max-width: 960px) {
    .s4n-nav-links { display: none; }
    .s4n-menu-toggle { display: flex; }
    .s4n-cta-btn { margin-left: auto; }

    .s4n-hero .s4n-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2.5rem;
    }
    .s4n-hero-content { max-width: 100%; }
    .s4n-hero-actions { justify-content: center; }
    .s4n-hero-visual { height: 260px; }
    .s4n-hero-logo-icon { width: 180px; height: 180px; }

    .s4n-service-detail-grid {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }
    .s4n-service-reverse {
        grid-template-areas: unset;
    }
    .s4n-service-reverse .s4n-service-detail-visual {
        grid-area: auto;
        order: 1;
    }
    .s4n-service-reverse .s4n-service-detail-content {
        grid-area: auto;
        order: 0;
    }

    .ts-grid.is-3-columns {
        grid-template-columns: 1fr 1fr !important;
    }
}

@media (max-width: 640px) {
    .s4n-section { padding: 3.5rem 0; }
    .s4n-page-hero { padding: 5.5rem 0 3rem; }

    .ts-grid.is-3-columns { grid-template-columns: 1fr 1fr !important; }
    .ts-grid.is-2-columns { grid-template-columns: 1fr 1fr !important; }

    /* 服務卡片格固定 2 欄 */
    .s4n-services-grid {
        grid-template-columns: 1fr 1fr !important;
        display: grid !important;
    }
    .s4n-services-grid .column {
        flex: unset !important;
        max-width: unset !important;
        width: 100% !important;
    }

    .ts-grid.is-relaxed .column.is-8-wide {
        flex: 0 0 100% !important;
        max-width: 100% !important;
    }
    .s4n-contact-grid .column { flex: 0 0 100% !important; max-width: 100% !important; }
    .s4n-about-grid  .column { flex: 0 0 100% !important; max-width: 100% !important; }

    .s4n-feature-list { grid-template-columns: 1fr; }

    .s4n-hero-title { font-size: 1.875rem; }
    .s4n-section-title { font-size: 1.625rem; }
}

/* 極小螢幕（< 400px）仍維持 2 欄服務卡片 */
@media (max-width: 400px) {
    .s4n-services-grid {
        grid-template-columns: 1fr 1fr !important;
        display: grid !important;
        gap: 0.75rem !important;
    }
    .ts-grid.is-3-columns,
    .ts-grid.is-2-columns {
        grid-template-columns: 1fr 1fr !important;
    }
    .s4n-service-icon { font-size: 1.5rem; }
    .s4n-service-title { font-size: 0.875rem !important; }
    .s4n-service-desc { font-size: 0.8rem; }
}