/* ==============================
   全站色系與基礎變數（與原站一致）
   ============================== */
:root{
  --c-bg: #f8f0e6;    /* 米色背景 */
  --c-text: #5a4a3f;  /* 主要深棕文字 */
  --c-mute: #8a8a8a;  /* 次要灰文字 */
  --c-line: #d9cfc4;  /* 淺米棕分隔線 */
  --c-accent: #a08974;/* 暖棕重點色(hover/重點) */

  --bs-body-font-family: "Noto Serif TC","PingFang TC","Heiti TC",
                         "Source Han Sans TC",system-ui,-apple-system,sans-serif;

  /* 文字層級（保留相容） */
  --text-default: var(--c-text);
  --text-muted: #6c757d;                   /* bootstrap muted */
  --text-faint: rgba(90,74,63,0.65);
  --text-ghost: rgba(90,74,63,0.5);
  --para-letter: 0.08em;                   /* 英文/大標題字距 */

  /* 自訂滾動條 */
  --scrollbar-width: 12px;
  --scrollbar-thumb: rgba(160,136,116,0.85);
  --scrollbar-thumb-hover: rgba(160,136,116,1);
  --scrollbar-track: rgba(0,0,0,0.04);
  --scrollbar-transition: 200ms;

  /* 墨色（在米色背景上更柔和） */
  --ink: #62595096;
}

/* 三個層級的 class（全站可用） */
.text-muted { color: var(--text-muted) !important; }
.text-faint { color: var(--text-faint) !important; }
.text-ghost { color: var(--text-ghost) !important; }
.text-spacing { letter-spacing: var(--para-letter); }
.text-h2s { font-size: 20px; }
.text-14 { font-size: 14px; }
.text-12 { font-size: 12px; }

/* ==============================
   全域排版基礎
   ============================== */
body{
  background-color: var(--c-bg);
  font-family: var(--bs-body-font-family);
  color: var(--c-text);
  -webkit-text-size-adjust: 100%;
  text-rendering: optimizeLegibility;
}

/* ==============================
   首屏遮罩（進場淡出）
   ============================== */
#splash {
  position: fixed;
  inset: 0;
  background-color: var(--c-bg);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 1;
  animation: splash-sequence 2s forwards; /* 總長 2 秒 */
  pointer-events: auto; /* 顯示時擋住點擊 */
}

@keyframes splash-sequence {
  0%, 80% { opacity: 1; visibility: visible; pointer-events: auto; }
  100%    { opacity: 0; visibility: hidden; pointer-events: none; }
}

/* 中間 Logo / 文字 */
.splash-logo {
  font-size: 1.5rem;
  font-weight: 300;
  color: var(--ink);
  opacity: 1;
  animation: fadeIn 1s ease forwards;
}
.splash-logo .title{
  line-height: 1.5;
  font-size: 3rem;
}
.splash-logo .title img{
  width: 100%;
}

/* 隱藏遮罩（結束狀態保險） */
#splash.hide { opacity: 0; pointer-events: none; }

@media (max-width:1200px){
  #splash .splash-logo .title img{ transform: scale(1.2); }
}
@media (max-width:992px){
  #splash .splash-logo .title img{ transform: scale(1.5); }
}
@media (max-width:768px){
  #splash .splash-logo .title img{ transform: scale(2.0); }
}
@media (max-width:576px){
  #splash .splash-logo .title img{ transform: scale(3.0); }
  .navbar-transparent .navbar-collapse {
    background-color: transparent !important;    
  }  
}

/* ==============================
   Navbar（透明/著色 + 質感 Hover 動畫）
   ============================== */
/* 容器與配色 */
.navbar-custom{ transition: background-color .3s ease, box-shadow .3s ease; }
.navbar-transparent{ background-color: transparent !important; color: #f8f0e6 !important; }
.navbar-colored{
  background-color: var(--c-bg) !important;
  box-shadow: 0 6px 14px rgba(0,0,0,.06);
}
.navbar-brand img{ height:45px; transition: all .3s ease; }

/* 預設 nav-link 樣式（含質感 hover 動畫） */
.navbar-custom .nav-link{
  position: relative;
  display: inline-block;
  font-size: .85rem;
  padding-top: .2rem;
  padding-bottom: .2rem;                 /* 騰出下劃線空間 */
  letter-spacing: 0.02em;
  transition: color .28s ease, letter-spacing .28s ease;
}

/* 著色 Navbar（滾動後）回到站內文字色 */
.navbar-colored .nav-link{ color: var(--c-text) !important; }

/* 中心展開下劃線（質感 hover） */
.navbar-custom .nav-link::after{
  content:"";
  position:absolute;
  left:50%;
  bottom:-4px;
  width:0;
  height:2px;
  background: var(--c-accent);
  transform: translateX(-50%);
  border-radius: 2px;
  transition: width .32s ease;
  box-shadow: 0 0 6px rgba(160,137,116,.35);
}

/* Hover：色彩微變、字距微張、下劃線展開 */
.navbar-custom .nav-link:hover{
  color: var(--c-accent) !important;
  letter-spacing: 0.04em;
}
.navbar-custom .nav-link:hover::after{ width: 72%; }

/* Active：維持下劃線顯示 */
.navbar-custom .nav-link.active{
  color: var(--c-accent) !important;
}
.navbar-custom .nav-link.active::after{ width: 72%; }

/* Icon（漢堡）對應配色 */
.navbar-custom .bi-list { color:#fff; }
.navbar-custom.navbar-colored .bi-list { color: var(--c-text); }

/* 行動版展開：確保可讀性 */
@media (max-width: 991.98px) {
  .navbar-collapse{ background-color: var(--c-bg); }
  .navbar-custom .nav-link { color: var(--ink) !important; }
  .navbar-custom .nav-link.active{
    color: var(--c-accent) !important;
  }
}

/* 動畫可及性：偏好減少動態時關閉過場 */
@media (prefers-reduced-motion: reduce){
  .navbar-custom .nav-link,
  .navbar-custom .nav-link::after,
  .navbar-custom { transition: none !important; }
}

/* ==============================
   版塊間距與標題
   ============================== */
.top-section { padding: 5rem 1rem 1rem; }
.top-section.text-center{ padding: 2rem 1rem; }
.top-section.text-center .section-title { padding-bottom: 20px; }

.section-spacing-sm{ padding:2rem 0; letter-spacing: 0.015rem; }

.section-spacing-lg .container{
  padding:4rem 0;
  letter-spacing: 0.06rem;
  border-bottom: 1px solid #8a8a8a34;
}

/* 注意：原選擇器 `section .section-spacing-lg .section-title,h2` 會同時選中所有 h2；
   改成更精準的寫法，避免全站 h2 被放大 */
.section-spacing-lg .section-title,
.section-spacing-lg h2{
  font-size: 2.2rem;
  margin-bottom: 2rem;
  font-weight: 700;
}

h2.smaller{ font-size: 1.6rem; }
h2.small{ font-size: 1.5rem; }

.vs-container .section-title{
  padding-top: 20px;
  padding-bottom: 20px;
}

.carousel-inner { width: auto; }

.Copyright{
  text-align: center;
  color: rgba(90,74,63,0.6);
}

/* ==============================
   右下角社群浮動按鈕（質感玻璃）
   ============================== */
/* 加到 index.css / common.css */
.social-fixed{
  position: fixed;
  right: 24px;
  bottom: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  z-index: 1100;             /* 確保在最上層 */
  pointer-events: none;       /* 外層關閉事件，讓內部 a 可點擊 */
}
.social-fixed .social-btn{
  pointer-events: auto;
  width: 56px; height: 56px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center; justify-content: center;
  text-decoration: none;
  background: rgba(255,255,255,0.06);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  border: 1px solid rgba(255,255,255,0.10);
  color: #ffffff; /* icon 顏色 */
  box-shadow: 0 6px 18px rgba(0,0,0,0.25);
  transition: transform .14s ease, box-shadow .14s ease, background .14s ease;
}
/* icon size */
.social-fixed .social-btn i{
  font-size: 20px; line-height: 1; display: block;
}
/* hover / focus */
.social-fixed .social-btn:hover,
.social-fixed .social-btn:focus{
  transform: translateY(-3px) scale(1.03);
  box-shadow: 0 10px 26px rgba(0,0,0,0.32);
  background: rgba(255,255,255,0.10);
  outline: none;
}

/* 可選：品牌色淡化 */
.social-fixed .social-line{ color: rgba(132,189,0,0.25); }
.social-fixed .social-fb{   color: rgba(59,89,152,0.25); }
.social-fixed .social-ig{   color: rgba(225,48,108,0.25); }

.social-fixed .social-line:hover{ color: rgba(132,189,0,0.6); }
.social-fixed .social-fb:hover{   color: rgba(59,89,152,0.6); }
.social-fixed .social-ig:hover{   color: rgba(225,48,108,0.6); }

/* RWD：縮小 */
@media (max-width: 767.98px){
  .social-fixed{ right: 12px; bottom: 12px; gap: 8px; }
  .social-fixed .social-btn{ width: 48px; height: 48px; }
  .social-fixed .social-btn i{ font-size: 18px; }
}
@media (max-width: 420px){
  .social-fixed{ right: 10px; bottom: 10px; gap: 6px; }
  .social-fixed .social-btn{ width: 44px; height: 44px; }
  .social-fixed .social-btn i{ font-size: 16px; }
}
/* 可選：當視窗寬度變很小時，改成水平排列（如果你希望） */
/* 
@media (max-width: 420px){
  .social-fixed{ flex-direction: row; right: 50%; transform: translateX(50%); }
}
*/
@media print{ .social-fixed{ display: none; } }
/* 鍵盤可見 */
.social-fixed .social-btn:focus{
  box-shadow: 0 0 0 4px rgba(255,255,255,0.06), 0 10px 26px rgba(0,0,0,0.32);
  transform: translateY(-3px) scale(1.03);
}

/* ==============================
   自訂捲動條（WebKit/Chromium）
   ============================== */
*::-webkit-scrollbar { width: var(--scrollbar-width); height: var(--scrollbar-width); }
*::-webkit-scrollbar-track {
  background: var(--scrollbar-track);
  border-radius: 999px;
}
*::-webkit-scrollbar-thumb {
  background: var(--scrollbar-thumb);
  border-radius: 999px;
  border: 3px solid transparent;          /* 內距讓 thumb 看起來不貼邊 */
  background-clip: padding-box;
  transition: background var(--scrollbar-transition), transform var(--scrollbar-transition), box-shadow var(--scrollbar-transition);
  box-shadow: inset 0 0 0 1px rgba(255,255,255,0.03);
}
*::-webkit-scrollbar-thumb:hover {
  background: var(--scrollbar-thumb-hover);
  transform: scale(1.05);
  box-shadow: 0 4px 14px rgba(0,0,0,0.08);
}

/* 可選：脈衝提示 */
.scrollbar-pulse *::-webkit-scrollbar-thumb {
  animation: thumb-pulse 1.6s ease-in-out infinite;
}
@keyframes thumb-pulse {
  0%   { box-shadow: 0 0 0 0 rgba(160,136,116,0.18); }
  70%  { box-shadow: 0 0 0 8px rgba(160,136,116,0); }
  100% { box-shadow: 0 0 0 0 rgba(160,136,116,0); }
}

/* Firefox 基礎捲動條樣式 */
html{
  scrollbar-width: thin; /* auto | thin | none */
  scrollbar-color: var(--scrollbar-thumb) var(--scrollbar-track);
}