/* ==========================================================================
   🎨 雙色劇本全域變數與重設 (全站一致)
   ========================================================================== */
:root {
  --bg-dark: #0c0e12;
  --card-bg: #161920;
  --accent-color: #0071e3;
  --text-main: #f5f5f7;
  --text-muted: #86868b;
  --nav-bg: rgba(12, 14, 18, 0.75);
  --table-th: rgba(255, 255, 255, 0.05);
  --table-border: rgba(255, 255, 255, 0.08);
  --table-hover: rgba(0, 113, 227, 0.05);
  --input-bg: rgba(255, 255, 255, 0.03);
  --input-border: rgba(255, 255, 255, 0.1);
  --footer-bg: #050608;
}

[data-theme="light"] {
  --bg-dark: #f5f5f7;
  --card-bg: #ffffff;
  --accent-color: #0066cc;
  --text-main: #1d1d1f;
  --text-muted: #6e6e73;
  --nav-bg: rgba(245, 245, 247, 0.8);
  --table-th: rgba(0, 0, 0, 0.03);
  --table-border: rgba(0, 0, 0, 0.08);
  --table-hover: rgba(0, 102, 204, 0.04);
  --input-bg: rgba(0, 0, 0, 0.02);
  --input-border: rgba(0, 0, 0, 0.15);
  --footer-bg: #e8e8ed;
}

*, *::before, *::after {
  box-sizing: border-box;
}

body {
  background-color: var(--bg-dark);
  color: var(--text-main);
  font-family: 'Noto Sans TC', sans-serif;
  margin: 0; padding: 0;
  overflow-x: hidden; line-height: 1.8;
  transition: background-color 0.5s ease, color 0.5s ease;
}

.calligraphy-title {
  font-family: "DFKai-SB", "BiauKai", "KaiTi", "標楷體", "全字庫正楷體", "Noto Serif TC", serif !important;
  font-weight: bold !important;
  letter-spacing: 5px !important;
}

.container { max-width: 1200px; margin: 0 auto; padding: 6rem 2rem; }
h2 { font-size: 2.5rem; text-align: center; margin-bottom: 3rem; position: relative; }
h2::after { content: ''; position: absolute; bottom: -10px; left: 50%; transform: translateX(-50%); width: 60px; height: 3px; background: var(--accent-color); }

/* ==========================================================================
   💥 水墨倒影開場 Preloader
   ========================================================================== */
#preloader {
  position: fixed; top: 0; left: 0; width: 100%; height: 100vh;
  background-color: #0b0d11; z-index: 100000; 
  display: flex; justify-content: center; align-items: center;
  transition: transform 0.9s cubic-bezier(0.77, 0, 0.175, 1), opacity 0.9s ease;
  animation: preloaderTimeout 1.8s ease forwards;
}
@keyframes preloaderTimeout {
  0%, 90% { opacity: 1; transform: translateY(0); }
  100% { opacity: 0; transform: translateY(-100vh); }
}
.ink-wrapper { text-align: center; display: flex; flex-direction: column; align-items: center; gap: 15px; }
.loader-logo-img { height: 70px; width: auto; object-fit: contain; opacity: 0; transform: translateY(-10px); animation: logoFadeIn 1.2s ease forwards 0.2s; }
.loader-text-main { font-family: "DFKai-SB", "BiauKai", "標楷體", serif; font-size: 3.8rem; letter-spacing: 8px; font-weight: bold; color: #ffffff; opacity: 0; animation: inkBleed 1.4s ease forwards 0.5s; position: relative; z-index: 2; }
.loader-text-reflection { font-family: "DFKai-SB", "BiauKai", "標楷體", serif; font-size: 3.8rem; letter-spacing: 8px; font-weight: bold; color: #ffffff; margin-top: -5px; transform: scaleY(-1); transform-origin: top center; -webkit-mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.35) 0%, rgba(0, 0, 0, 0) 80%); mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.35) 0%, rgba(0, 0, 0, 0) 80%); filter: blur(1.5px); opacity: 0; animation: inkReflectionBleed 1.4s ease forwards 0.5s; z-index: 1; }
body.loaded #preloader { transform: translateY(-100vh); pointer-events: none; }
@keyframes logoFadeIn { to { opacity: 1; transform: translateY(0); } }
@keyframes inkBleed { to { opacity: 1; transform: scale(1); } }
@keyframes inkReflectionBleed { to { opacity: 0.8; transform: scaleY(-1); } }

/* ==========================================================================
   📱 頂部導覽列 (Navbar) & 跨網頁 RWD 標準化
   ========================================================================== */
.navbar {
  background: var(--nav-bg) !important; backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(128,128,128,0.1); position: fixed; width: 100%; top: 0; z-index: 9999;
  display: flex; justify-content: space-between; align-items: center; padding: 1.5rem 4rem; box-sizing: border-box; transition: all 0.3s ease;
}
.navbar.shrink { padding: 0.8rem 4rem; }
.logo-text { color: var(--text-main) !important; text-decoration: none; font-size: 1.5rem; white-space: nowrap; font-weight: bold; }
.logo-img { height: 45px; width: auto; object-fit: contain; }
.nav-right-wrap { display: flex; align-items: center; gap: 2rem; }
.nav-links { display: flex; list-style: none; gap: 2rem; margin: 0; padding: 0; }
.nav-links a { color: var(--text-muted); text-decoration: none; font-weight: 500; transition: color 0.3s; white-space: nowrap; }
.nav-links a:hover, .nav-links a.active { color: var(--text-main); font-weight: 700; }
.nav-links a.active { color: var(--accent-color); }

.hamburger { display: none; flex-direction: column; gap: 6px; cursor: pointer; }
.hamburger span { width: 25px; height: 3px; background-color: var(--text-main); transition: all 0.3s ease; }
.hamburger.open span:nth-child(1) { transform: rotate(45deg) translate(6px, 6px); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: rotate(-45deg) translate(6px, -6px); }

.theme-toggle-btn {
  background: transparent; border: 1px solid var(--text-muted); color: var(--text-main);
  padding: 0.4rem 1rem; border-radius: 20px; cursor: pointer; font-size: 0.85rem; font-weight: 700;
  display: flex; align-items: center; gap: 6px; transition: all 0.3s ease; white-space: nowrap;
}
.theme-toggle-btn:hover { border-color: var(--accent-color); color: var(--accent-color); }

/* ==========================================================================
   📌 各分頁專屬佈局元素
   ========================================================================== */
/* 按鈕 */
.btn {
  display: inline-block; padding: 0.9rem 2.5rem; background: var(--text-main); color: var(--bg-dark) !important;
  text-decoration: none; font-weight: 700; border-radius: 50px; transition: all 0.3s cubic-bezier(0.165, 0.84, 0.44, 1);
  cursor: pointer; box-shadow: 0 4px 15px rgba(0,0,0,0.1); border: none;
}
.btn:hover { transform: translateY(-3px); background: var(--accent-color); color: #fff !important; box-shadow: 0 10px 25px rgba(0, 113, 227, 0.3); }

/* Banner 區塊 */
.hero-section { height: 90vh; display: flex; align-items: center; justify-content: center; text-align: center; position: relative; background-size: cover; background-position: center; background-attachment: fixed; }
.hero-section::before { content: ''; position: absolute; top:0; left:0; width:100%; height:100%; background: linear-gradient(to bottom, rgba(0,0,0,0.3), var(--bg-dark)); transition: background 0.5s ease; }
.hero-content { position: relative; z-index: 2; max-width: 900px; padding: 0 1rem; }
.hero-content h1 { font-size: 4.5rem; margin-bottom: 1.5rem; color: var(--text-main); }
.hero-content p { font-size: 1.25rem; color: var(--text-muted); margin-bottom: 3rem; letter-spacing: 2px; }

.page-banner { height: 35vh; display: flex; align-items: center; justify-content: center; text-align: center; position: relative; background-size: cover; background-position: center; background-attachment: fixed; }
.page-banner::before { content: ''; position: absolute; top:0; left:0; width:100%; height:100%; background: linear-gradient(to bottom, rgba(0,0,0,0.4), var(--bg-dark)); }
.banner-content { position: relative; z-index: 2; }
.banner-content h1 { font-size: 3rem; margin-bottom: 0.5rem; color: #ffffff; }

/* 首頁企業核心 */
.home-intro { text-align: center; max-width: 800px; }
.home-intro-content p { font-size: 1.15rem; color: var(--text-muted); text-align: justify; }

/* 關於我們區塊 */
.about-main { display: flex; align-items: center; gap: 3rem; margin-top: 2rem; }
.about-text-block { flex: 1.2; }
.about-text-block p { color: var(--text-muted); font-size: 1.1rem; text-align: justify; margin: 0; }
.about-img-block { flex: 0.8; border-radius: 16px; overflow: hidden; border: 1px solid rgba(128,128,128,0.1); box-shadow: 0 10px 25px rgba(0,0,0,0.1); }
.about-img-block img { width: 100%; height: auto; display: block; filter: grayscale(10%) contrast(105%); }

.about-main.reverse { flex-direction: row; }
.dev-text p { color: var(--text-muted); font-size: 1.2rem; margin: 0 0 0.9rem 0; line-height: 1.75; }
.dev-text p:last-child { margin-bottom: 0; }


/* 經營理念跑馬燈 */
.marquee-container { overflow: hidden; width: 100%; padding: 2.5rem 0; position: relative; }
.marquee-container::before, .marquee-container::after { content: ""; height: 100%; position: absolute; top: 0; width: 120px; z-index: 2; pointer-events: none; }
.marquee-container::before { left: 0; background: linear-gradient(to right, var(--bg-dark), rgba(0, 0, 0, 0)); }
.marquee-container::after { right: 0; background: linear-gradient(to left, var(--bg-dark), rgba(0, 0, 0, 0)); }
.marquee-track { display: flex; width: calc(350px * 6 + 2rem * 6); gap: 2rem; animation: marqueeScroll 25s linear infinite; }
.marquee-container:hover .marquee-track { animation-play-state: paused; }
.philosophy-card { flex-shrink: 0; width: 350px; background: var(--card-bg); border: 1px solid rgba(128, 128, 128, 0.1); border-radius: 16px; padding: 2.5rem 2rem; box-sizing: border-box; position: relative; transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.4s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.4s cubic-bezier(0.16, 1, 0.3, 1); }
.philosophy-card:hover { transform: translateY(-8px); border-color: var(--accent-color); box-shadow: 0 20px 40px rgba(0, 113, 227, 0.12), 0 1px 3px rgba(0, 113, 227, 0.2); }
.philosophy-card h3 { margin-top: 0; color: var(--accent-color); font-size: 1.5rem; font-weight: 700; }
.philosophy-card p { margin: 0; color: var(--text-muted); font-size: 0.95rem; text-align: justify; line-height: 1.6; }
@keyframes marqueeScroll { 0% { transform: translateX(0); } 100% { transform: translateX(calc(-350px * 3 - 2rem * 3)); } }

.one-stop-text {
  text-align: center; max-width: 800px; margin: 4rem auto; font-size: 1.2rem; color: var(--text-main); font-weight: 500; background: var(--card-bg); padding: 2.5rem 2rem; border-radius: 12px; position: relative; overflow: hidden; box-shadow: 0 4px 20px rgba(0,0,0,0.05); border-left: 4px solid var(--accent-color); z-index: 1;
}
.one-stop-text::before { content: ""; position: absolute; top: 50%; left: 50%; width: 150px; height: 150px; background: var(--accent-color); border-radius: 50%; filter: blur(90px); opacity: 0.12; transform: translate(-50%, -50%) scale(0.5); transition: transform 1.2s cubic-bezier(0.1, 0.8, 0.2, 1); z-index: -1; }
.one-stop-text.aos-animate::before { transform: translate(-50%, -50%) scale(2.5); }

/* 專業證照與 Lightbox */
.license-list { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 2rem; margin-top: 2rem; }
.license-item { background: var(--card-bg); border: 1px solid rgba(128,128,128,0.1); border-radius: 16px; padding: 1.5rem; text-align: center; cursor: pointer; transition: all 0.4s ease; }
.license-item:hover { transform: translateY(-8px); border-color: var(--accent-color); box-shadow: 0 15px 30px rgba(0,0,0,0.15); }
.license-item img { width: 100%; height: 180px; object-fit: contain; background: #fff; padding: 5px; border-radius: 8px; }
.license-name { font-weight: 700; margin: 1rem 0 0.3rem 0; color: var(--text-main); font-size: 1.05rem; }
.license-valid { color: var(--text-muted); font-size: 0.85rem; margin: 0; }

.lightbox { display: flex; position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(12, 14, 18, 0.6); z-index: 100000; justify-content: center; align-items: center; backdrop-filter: blur(0px); -webkit-backdrop-filter: blur(0px); opacity: 0; pointer-events: none; transition: opacity 0.4s cubic-bezier(0.25, 1, 0.5, 1), backdrop-filter 0.4s cubic-bezier(0.25, 1, 0.5, 1); }
.lightbox.active { opacity: 1; pointer-events: auto; backdrop-filter: blur(15px); -webkit-backdrop-filter: blur(15px); }
.lightbox-img { max-width: 85%; max-height: 85%; border-radius: 12px; box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5); border: 1px solid rgba(255, 255, 255, 0.1); transform: scale(0.92) translateY(15px); transition: transform 0.45s cubic-bezier(0.34, 1.56, 0.64, 1); }
.lightbox.active .lightbox-img { transform: scale(1) translateY(0); }
.lightbox-close { position: absolute; top: 30px; right: 40px; color: rgba(255, 255, 255, 0.6); font-size: 45px; font-weight: 300; cursor: pointer; width: 50px; height: 50px; display: flex; align-items: center; justify-content: center; background: rgba(255, 255, 255, 0.05); border-radius: 50%; border: 1px solid rgba(255, 255, 255, 0.1); transition: all 0.3s ease; }
.lightbox-close:hover { color: #ffffff; background: var(--accent-color); border-color: var(--accent-color); transform: rotate(90deg); }

/* 服務項目 (6宮格與2欄佈局) */
.projects-overview { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 2rem; }
.project-item { background: var(--card-bg); border-radius: 16px; overflow: hidden; border: 1px solid rgba(128,128,128,0.1); padding-bottom: 1.5rem; text-align: center; transition: all 0.4s ease; }
.project-item img { width: 100%; height: 220px; object-fit: cover; transition: all 0.5s ease; }
.project-item:hover { transform: translateY(-10px); box-shadow: 0 15px 30px rgba(0,0,0,0.1); }
.project-item:hover img { transform: scale(1.05); }
.project-item h3 { font-size: 1.25rem; margin-top: 1.5rem; font-weight: 700; color: var(--text-main); }

.service-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 2.5rem; align-items: start; margin-top: 2rem; }
.service-grid-home { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 2.5rem; align-items: start; } /* 首頁專用代表實績網格 */
.service-item { background: var(--card-bg); border: 1px solid rgba(128, 128, 128, 0.1); border-radius: 16px; padding: 2rem; box-sizing: border-box; transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.4s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.4s cubic-bezier(0.16, 1, 0.3, 1); overflow: hidden; }
.service-item:hover { transform: translateY(-8px); border-color: var(--accent-color); box-shadow: 0 25px 50px rgba(0, 113, 227, 0.12); }
.service-item h2 { font-size: 1.6rem; margin-top: 0; margin-bottom: 1.2rem; color: var(--text-main); }
.service-img-wrapper { width: 100%; height: 260px; border-radius: 8px; overflow: hidden; margin-bottom: 1.2rem; position: relative; background: rgba(0, 0, 0, 0.2); }
.service-item img { width: 100%; height: auto; object-fit: cover; display: block; transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1); }
.service-item:hover .service-img-wrapper img { transform: scale(1.06); }
.service-item p { color: var(--text-muted); font-size: 1.05rem; margin: 0; line-height: 1.7; text-align: justify; }

/* 工程實績網格結構 */
.intro-text { text-align: center; color: var(--text-muted); font-size: 1.1rem; margin-bottom: 3rem; }
.project-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem; }
.project-grid .project-item { background: var(--card-bg); border: 1px solid rgba(128, 128, 128, 0.1); border-radius: 16px; overflow: hidden; display: flex; flex-direction: column; padding-bottom: 0; text-align: left; transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.4s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.4s cubic-bezier(0.16, 1, 0.3, 1); }
.project-grid .project-item:hover { transform: translateY(-8px); border-color: var(--accent-color); box-shadow: 0 25px 50px rgba(0, 113, 227, 0.12); }
.project-img-wrapper-grid { width: 100%; height: 220px; overflow: hidden; position: relative; background: rgba(0,0,0,0.2); }
.project-grid .project-item img { width: 100%; height: 100%; object-fit: cover; display: block; transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1); }
.project-grid .project-item:hover .project-img-wrapper-grid img { transform: scale(1.06); }
.project-info { padding: 1.5rem; display: flex; flex-direction: column; flex-grow: 1; }
.project-grid .project-item h3 { font-size: 1.15rem; margin: 0 0 1rem 0; color: var(--text-main); line-height: 1.5; font-weight: 700; text-align: justify; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; height: 3.4rem; }
.project-year { align-self: flex-start; background: rgba(128, 128, 128, 0.08); color: var(--text-muted); font-size: 0.85rem; font-weight: 700; padding: 0.2rem 0.8rem; border-radius: 20px; border: 1px solid rgba(128, 128, 128, 0.15); transition: all 0.3s; }
.project-grid .project-item:hover .project-year { background: rgba(0, 113, 227, 0.1); color: var(--accent-color); border-color: rgba(0, 113, 227, 0.2); }
.btn-wrap { text-align: center; margin: 4rem 0 2rem 0; }
.btn-outline { background: transparent; color: var(--text-main); border: 1px solid var(--text-muted); padding: 0.8rem 2.5rem; font-size: 1.05rem; font-weight: 700; border-radius: 30px; cursor: pointer; transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1); outline: none; }
.btn-outline:hover { border-color: var(--accent-color); color: #ffffff; background: var(--accent-color); box-shadow: 0 10px 20px rgba(0, 113, 227, 0.2); transform: translateY(-2px); }

/* 💥 新升級：全站一體化手風琴過場表格 */
.table-responsive { width: 100%; overflow-x: auto; -webkit-overflow-scrolling: touch; border-radius: 12px; }
.past-projects-wrap { max-height: 0; overflow: hidden; opacity: 0; transition: max-height 0.6s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.5s cubic-bezier(0.16, 1, 0.3, 1); margin-top: 0; }
.past-projects-wrap.active { opacity: 1; margin-top: 4rem; }
.past-projects-table { width: 100%; border-collapse: collapse; background: var(--card-bg); border-radius: 12px; overflow: hidden; border: 1px solid var(--table-border); }
.past-projects-table th { background-color: var(--table-th); color: var(--text-main); font-weight: 700; text-align: left; padding: 1.2rem 1.5rem; font-size: 1.05rem; border-bottom: 2px solid var(--table-border); white-space: nowrap; }
.past-projects-table td { padding: 1.1rem 1.5rem; color: var(--text-muted); border-bottom: 1px solid var(--table-border); font-size: 0.98rem; transition: background 0.2s, color 0.2s; }
.past-projects-table tr:last-child td { border-bottom: none; }
.past-projects-table tr:hover td { background-color: var(--table-hover); color: var(--text-main); }
.past-projects-table tr td:first-child { font-weight: 700; }

/* 聯絡我們表單與地圖佈局 */
.contact-grid { display: grid; grid-template-columns: 5fr 7fr; gap: 3rem; align-items: start; }
.info-panel { display: flex; flex-direction: column; gap: 1.5rem; }
.info-card { background: var(--card-bg); border: 1px solid rgba(128,128,128,0.1); border-radius: 16px; padding: 1.8rem; display: flex; gap: 1.2rem; align-items: flex-start; transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1); }
.info-card:hover { border-color: var(--accent-color); transform: translateX(5px); box-shadow: 0 15px 30px rgba(0, 113, 227, 0.08); }
.info-icon { font-size: 1.6rem; background: rgba(0, 113, 227, 0.1); color: var(--accent-color); width: 50px; height: 50px; border-radius: 12px; display: flex; justify-content: center; align-items: center; flex-shrink: 0; }
.info-detail h3 { margin: 0 0 0.3rem 0; font-size: 1.1rem; color: var(--text-main); }
.info-detail p { margin: 0; color: var(--text-muted); font-size: 0.95rem; word-break: break-all; }
.info-detail a { color: var(--text-muted); text-decoration: none; transition: color 0.2s; }
.info-detail a:hover { color: var(--accent-color); }

.form-panel { background: var(--card-bg); border: 1px solid rgba(128,128,128,0.1); border-radius: 16px; padding: 2.5rem; box-shadow: 0 20px 40px rgba(0,0,0,0.05); }
.form-panel h2 { margin: 0 0 0.5rem 0; font-size: 1.6rem; color: var(--text-main); }
.form-subtitle { color: var(--text-muted); font-size: 0.95rem; margin-bottom: 2rem; }
.form-group { position: relative; margin-bottom: 1.8rem; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; }
.form-label { display: block; font-size: 0.9rem; font-weight: 700; margin-bottom: 0.5rem; color: var(--text-main); }
.form-control { width: 100%; box-sizing: border-box; background: var(--input-bg); border: 1px solid var(--input-border); border-radius: 8px; padding: 0.85rem 1rem; color: var(--text-main); font-size: 1rem; font-family: inherit; transition: all 0.3s; }
.form-control:focus { outline: none; border-color: var(--accent-color); background: var(--card-bg); box-shadow: 0 0 0 3px rgba(0, 113, 227, 0.15); }
select.form-control { cursor: pointer; appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%2386868b' viewBox='0 0 16 16'%3E%3Cpath d='M7.247 11.14 2.451 5.658C1.885 5.013 2.345 4 3.204 4h9.592a1 1 0 0 1 .753 1.659l-4.796 5.48a1 1 0 0 1-1.506 0z'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: calc(100% - 1rem) center; padding-right: 2.5rem; }
.submit-btn { width: 100%; background: var(--accent-color); color: #ffffff; border: none; padding: 1rem; font-size: 1.1rem; font-weight: 700; border-radius: 8px; cursor: pointer; transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1); }
.submit-btn:hover { transform: translateY(-2px); box-shadow: 0 10px 20px rgba(0, 113, 227, 0.3); filter: brightness(1.1); }

.map-container { margin-top: 4rem; border-radius: 16px; overflow: hidden; border: 1px solid rgba(128,128,128,0.1); box-shadow: 0 15px 35px rgba(0,0,0,0.1); height: 450px; }
.map-container iframe { width: 100%; height: 100%; border: 0; display: block; }

/* 頁尾 */
footer { background: var(--footer-bg); padding: 4rem 2rem; text-align: center; border-top: 1px solid rgba(128,128,128,0.1); font-size: 0.9rem; color: var(--text-muted); transition: background 0.5s ease; }
footer a { color: var(--accent-color); text-decoration: none; }

/* ==========================================================================
   📱 智慧響應式邊界 RWD Media Queries
   ========================================================================== */
@media (max-width: 992px) {
  .navbar, .navbar.shrink { padding: 1rem 2rem; }
  .hero-content h1 { font-size: 3rem; }
  .about-main { flex-direction: column; gap: 2rem; }
  .about-img-block { width: 100%; max-width: 400px; }
  .service-grid { gap: 1.8rem; }
  .project-grid { grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }
  .contact-grid { grid-template-columns: 1fr; gap: 2.5rem; }
}

@media (max-width: 768px) {
  .hamburger { display: flex; }
  .nav-links { display: none; position: absolute; top: 100%; left: 0; width: 100%; background: var(--card-bg); flex-direction: column; gap: 0; text-align: center; border-bottom: 1px solid rgba(128,128,128,0.1); box-shadow: 0 10px 15px rgba(0,0,0,0.1); }
  .nav-links.open { display: flex; }
  .nav-links li { width: 100%; }
  .nav-links a { display: block; padding: 1.2rem; border-bottom: 1px solid rgba(128,128,128,0.05); }
  .nav-right-wrap { gap: 1rem; }
  .navbar, .navbar.shrink { padding: 0.8rem 1.5rem; }
  .hero-content h1 { font-size: 2.2rem; }
  .hero-content p { font-size: 1rem; }
  .loader-text-main, .loader-text-reflection { font-size: 2.4rem; letter-spacing: 4px; }
  .container { padding: 4rem 1.2rem; }
  h2 { font-size: 2rem; }
  
  .philosophy-card { width: 280px; padding: 2rem 1.5rem; }
  .marquee-track { width: calc(280px * 6 + 1.5rem * 6); gap: 1.5rem; }
  @keyframes marqueeScroll { 0% { transform: translateX(0); } 100% { transform: translateX(calc(-280px * 3 - 1.5rem * 3)); } }
  
  .service-grid { grid-template-columns: 1fr; gap: 1.5rem; }
  .service-img-wrapper { height: 200px; }
  
  .project-grid { grid-template-columns: 1fr; gap: 1.5rem; }
  .project-img-wrapper-grid { height: 200px; }
  .past-projects-table th, .past-projects-table td { padding: 0.9rem 1rem; font-size: 0.9rem; }
  
  .form-panel { padding: 1.8rem 1.2rem; }
  .form-row { grid-template-columns: 1fr; gap: 0; }
  .map-container { height: 320px; margin-top: 2.5rem; }
}