/* ============================================================
   微壤科技官網
   色彩語言：暖黑的土壤、暖金的人、青綠的 AI。
   金色是「人」的顏色，青綠只給 AI 相關的東西用，兩者面積都要克制。
   ============================================================ */
:root {
  /* 土壤（基底）：暗沉的褐，不是純黑；主視覺場景本身仍是 #0a0807，底部漸層接到 --soil */
  --bg-0: #1a140f;
  --soil: #1a140f;
  --bg-1: #110e0b;
  --bg-2: #18130f;
  --line: #2a231d;
  --line-2: #3a3027;

  /* 文字 */
  --text-1: #efe6d8;
  --text-2: #b8ab98;
  --text-3: #85796b;

  /* 人：暖金 */
  --gold: #f2b35c;
  --gold-2: #f7cd8d;
  --ember: #ff7a3d;
  /* AI：青綠（--ai-rgb 給 rgba() 用；產品區塊會覆寫這兩個變數換成自己的顏色） */
  --ai: #3ee6c8;
  --ai-rgb: 62,230,200;

  --font-sans: 'Noto Sans TC', 'Microsoft JhengHei', 'PingFang TC', system-ui, sans-serif;
  --font-serif: 'Noto Serif TC', 'Songti TC', 'PMingLiU', serif;

  --wrap: 1120px;
  --gutter: 24px;
  --radius: 14px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0; background: var(--bg-0); color: var(--text-1);
  font: 400 16px/1.85 var(--font-sans); letter-spacing: .02em;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; }
[hidden] { display: none !important; }
svg { fill: currentColor; }

.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 var(--gutter); }
.wrap.narrow { max-width: 820px; }
.center { text-align: center; }

/* ---------- 疊層：背景網格（最底）→ 內容 → 主視覺（不透明，蓋住背景）→ 導覽列 ---------- */
.bgfx {
  /* 不透明的土壤就畫在這張 canvas 上；中間淡、兩側濃的處理在 bg.js 繪製時做 */
  position: fixed; inset: 0; width: 100%; height: 100%; z-index: 0; pointer-events: none;
}
main, .foot { position: relative; z-index: 1; }
.hero { z-index: 2; }
/* 底片顆粒：讓大面積暗色不像純色塊 */
body::after {
  content: ''; position: fixed; inset: 0; z-index: 15; pointer-events: none; opacity: .1; mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ---------- 按鈕 ---------- */
.btn {
  display: inline-flex; align-items: center; gap: .5em;
  padding: .72em 1.4em; border-radius: 999px; font-size: 15px; font-weight: 500; letter-spacing: .06em;
  border: 1px solid transparent; transition: background .3s, border-color .3s, color .3s, box-shadow .3s;
}
.btn svg { width: 18px; height: 18px; }
.btn-gold { background: var(--gold); color: #1a120a; box-shadow: 0 0 0 0 rgba(242,179,92,0); }
.btn-gold:hover { background: var(--gold-2); box-shadow: 0 0 32px rgba(242,179,92,.35); }
.btn-ghost { border-color: var(--line-2); color: var(--text-1); }
.btn-ghost:hover { border-color: var(--gold); color: var(--gold); }
.btn-lg { padding: .9em 2em; font-size: 17px; }
:focus-visible { outline: 2px solid var(--gold); outline-offset: 3px; }

/* ---------- 頂部導覽 ---------- */
.top {
  position: fixed; inset: 0 0 auto 0; z-index: 20;
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px var(--gutter); transition: background .4s, padding .4s, border-color .4s;
  border-bottom: 1px solid transparent;
}
.top.scrolled { background: rgba(10,8,7,.78); backdrop-filter: blur(10px); padding: 12px var(--gutter); border-bottom-color: var(--line); }
.brand { display: flex; align-items: center; gap: 10px; }
.brand-mark { height: 52px; width: 53.33px; display: block; flex: none; }
.brand-mark img, .brand-mark canvas { display: block; width: 100%; height: 100%; }
.brand-mark [hidden] { display: none; }   /* C1 網點芽 logo 完整網點版；規範最小 49px，再縮會糊（勿改回實心小尺寸版，使用者 10-01 拍板） */
.brand-name { font-family: var(--font-serif); font-weight: 600; font-size: 22px; letter-spacing: .18em; }   /* 配平 52px 網點 logo */
.nav { display: flex; align-items: center; gap: 30px; font-size: 14px; letter-spacing: .12em; color: var(--text-2); }
.nav a:not(.btn):hover { color: var(--gold); }
.nav .btn { padding: .5em 1.2em; font-size: 14px; }
/* 手機版選單：右上角開合鈕，點開後導覽列下方展開直式選單 */
.nav-toggle { display: none; width: 42px; height: 42px; border-radius: 10px; border: 1px solid var(--line-2); background: rgba(10,8,7,.4); color: var(--text-1); cursor: pointer; align-items: center; justify-content: center; padding: 0; }
.nav-toggle svg { width: 22px; height: 22px; }
.nav-toggle .i-close { display: none; }
.top.open .nav-toggle .i-open { display: none; }
.top.open .nav-toggle .i-close { display: block; }
@media (max-width: 820px) {
  .nav-toggle { display: inline-flex; }
  .nav {
    position: absolute; left: 0; right: 0; top: 100%; flex-direction: column; align-items: stretch; gap: 0;
    padding: 8px var(--gutter) 20px; background: rgba(16,12,9,.97); backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--line); font-size: 16px;
    opacity: 0; visibility: hidden; transform: translateY(-8px); transition: opacity .25s, transform .25s, visibility .25s;
  }
  .nav a:not(.btn) { padding: 14px 4px; border-bottom: 1px solid var(--line); }
  .nav .btn { margin-top: 16px; justify-content: center; padding: .8em 1em; font-size: 15px; }
  .top.open { background: rgba(16,12,9,.97); border-bottom-color: var(--line); }
  .top.open .nav { opacity: 1; visibility: visible; transform: none; }
}
@media (max-width: 820px) and (prefers-reduced-motion: reduce) { .nav { transition: none; } }
/* 桌機寬度但選單放不下（app.js 量過後加 .compact）：比照手機版的收合選單 */
.top.compact .nav-toggle { display: inline-flex; }
.top.compact .nav {
  position: absolute; left: 0; right: 0; top: 100%; flex-direction: column; align-items: stretch; gap: 0;
  padding: 8px var(--gutter) 20px; background: rgba(16,12,9,.97); backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line); font-size: 16px;
  opacity: 0; visibility: hidden; transform: translateY(-8px); transition: opacity .25s, transform .25s, visibility .25s;
}
.top.compact .nav a:not(.btn) { padding: 14px 4px; border-bottom: 1px solid var(--line); }
.top.compact .nav .btn { margin-top: 16px; justify-content: center; padding: .8em 1em; font-size: 15px; }
.top.compact.open { background: rgba(16,12,9,.97); border-bottom-color: var(--line); }
.top.compact.open .nav { opacity: 1; visibility: visible; transform: none; }
.top.compact .lang-switch { padding: 14px 0 2px; gap: 6px; font-size: 14px; }
.top.compact .nav .lang-switch a { padding: 6px 10px; border-bottom: 0; }
@media (prefers-reduced-motion: reduce) { .top.compact .nav { transition: none; } }
.top.measuring .nav { transition: none !important; }

/* ---------- 多語系 ---------- */
/* 語言切換：桌機是導覽列裡一組小字，手機選單裡橫排一列 */
.lang-switch { display: flex; align-items: center; gap: 2px; font-size: 12px; letter-spacing: .04em; }
.lang-switch a { padding: 3px 7px; border-radius: 6px; color: var(--text-2); }
.lang-switch a[aria-current] { color: var(--gold); background: rgba(242,179,92,.1); }
@media (max-width: 820px) {
  .lang-switch { padding: 14px 0 2px; gap: 6px; font-size: 14px; }
  .nav .lang-switch a { padding: 6px 10px; border-bottom: 0; }   /* 蓋掉手機選單連結的大間距與底線 */
}
/* 各語言字型：日文漢字、韓文要用該語言字型，繁中字型的字形會不對；外語頁只載自己的字型（build-i18n.py 換 <link>） */
html[lang="en"] { --font-sans: 'Noto Sans', system-ui, sans-serif; --font-serif: 'Noto Serif', Georgia, serif; }
html[lang="ja"] { --font-sans: 'Noto Sans JP', 'Hiragino Sans', 'Yu Gothic', system-ui, sans-serif; --font-serif: 'Noto Serif JP', 'Hiragino Mincho ProN', 'Yu Mincho', serif; }
html[lang="ko"] { --font-sans: 'Noto Sans KR', 'Apple SD Gothic Neo', 'Malgun Gothic', system-ui, sans-serif; --font-serif: 'Noto Serif KR', 'AppleMyungjo', serif; }
html[lang="ko"] body { word-break: keep-all; }   /* 韓文以詞為單位換行，不從詞中間斷 */
html[lang="en"] .brand-name { letter-spacing: .08em; }
.title .word { display: inline-block; white-space: nowrap; }   /* 英文、韓文標題逐字動畫：詞內不斷行 */

/* ---------- 主視覺 ---------- */
.hero { position: relative; height: 100vh; height: 100svh; min-height: 560px; overflow: hidden; }
.hero-stage, .hero-poster { position: absolute; inset: 0; width: 100%; height: 100%; }
.hero-poster { object-fit: cover; }
/* 主視覺底部漸漸透明，直接融進下面的土壤背景（bg.js），不留接縫 */
.hero-stage, .hero-poster {
  -webkit-mask-image: linear-gradient(180deg, #000 70%, transparent 100%);
          mask-image: linear-gradient(180deg, #000 70%, transparent 100%);
}
.hero-stage canvas { display: block; }
.hero-scrim {
  position: absolute; inset: 0; pointer-events: none;
  background:
    linear-gradient(180deg, rgba(10,8,7,.55) 0%, rgba(10,8,7,0) 22%),
    linear-gradient(0deg, rgba(26,20,15,.45) 0%, rgba(26,20,15,.4) 22%, rgba(10,8,7,0) 52%);
}
.hero-text {
  position: absolute; left: 0; right: 0; bottom: 11vh;
  max-width: var(--wrap); margin: 0 auto; padding: 0 var(--gutter);
}
.kicker { font-size: 12px; letter-spacing: .38em; color: var(--gold); text-transform: uppercase; margin-bottom: 18px; }
.hero-title {
  font-family: var(--font-serif); font-weight: 600; margin: 0 0 20px;
  font-size: clamp(30px, 4.6vw, 58px); line-height: 1.32; letter-spacing: .06em;
  text-shadow: 0 2px 30px rgba(10,8,7,.8);
}
.hero-title .line { display: block; }
.hero-title .line:last-child {
  background: linear-gradient(100deg, var(--text-1) 0%, var(--gold-2) 55%, var(--gold) 100%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-sub { max-width: 560px; color: var(--text-2); font-size: 16px; margin: 0 0 30px; }
.hero-cta { display: flex; gap: 14px; flex-wrap: wrap; }
.scroll-hint { position: absolute; left: 50%; bottom: 26px; width: 1px; height: 48px; background: linear-gradient(var(--line-2), transparent); overflow: hidden; }
.scroll-hint span { position: absolute; left: 0; top: -20px; width: 1px; height: 20px; background: var(--gold); animation: drip 2.4s ease-in-out infinite; }
@keyframes drip { to { top: 48px; } }
@media (prefers-reduced-motion: reduce) { .scroll-hint span { animation: none; top: 14px; } }
@media (max-width: 700px) {
  .hero-text { bottom: 8vh; }
  .hero-title { font-size: min(7vw, 30px); letter-spacing: .02em; }   /* 第二行 12 個字要擠在一行 */
  .hero-sub { font-size: 15px; }
  .scroll-hint { display: none; }
}

/* ---------- 區塊共用 ---------- */
.block { padding: 128px 0; position: relative; }
.title {
  font-family: var(--font-serif); font-weight: 600; margin: 0 0 28px;
  font-size: clamp(26px, 3.2vw, 40px); line-height: 1.45; letter-spacing: .06em;
}
.lead { color: var(--text-2); font-size: 17px; max-width: 760px; margin: 0 0 48px; }
.center .lead { margin-left: auto; margin-right: auto; }
@media (max-width: 700px) { .block { padding: 88px 0; } }

/* 區塊之間的根系線：一條細線，偶爾有一顆光點往下流 */
.rootline { position: relative; height: 90px; width: 1px; margin: 0 auto; background: linear-gradient(transparent, var(--line-2), transparent); overflow: hidden; }
.rootline i { position: absolute; left: -1px; top: -24px; width: 3px; height: 24px; border-radius: 3px; background: linear-gradient(transparent, var(--ai)); box-shadow: 0 0 10px var(--ai); animation: root 3.8s ease-in infinite; }
@keyframes root { 0%, 30% { top: -24px; opacity: 0; } 40% { opacity: 1; } 100% { top: 90px; opacity: 0; } }
@media (prefers-reduced-motion: reduce) { .rootline i { display: none; } }

/* ---------- 理念 ---------- */
.belief .title { font-size: clamp(26px, 3.4vw, 42px); }
.belief-body p { color: var(--text-2); font-size: 17px; margin: 0 0 1em; }
.belief-body b { color: var(--gold); font-weight: 500; }
/* 文字＋動態網點 logo 兩欄；手機改成 logo 在上 */
.belief-grid { max-width: 1060px; display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 64px; align-items: center; }
.belief-mark img, .belief-mark canvas { display: block; width: 100%; height: auto; }
.belief-mark [hidden] { display: none; }
@media (max-width: 860px) {
  .belief-grid { grid-template-columns: 1fr; gap: 36px; }
  .belief-mark { order: -1; width: 200px; }
}
/* ?tune 參數面板（只在網址帶 ?tune 時出現） */
.dots-tuner { grid-column: 1 / -1; display: grid; gap: 8px; padding: 14px; border: 1px solid var(--line-2); border-radius: 10px; font-size: 13px; color: var(--text-2); }
.dots-tuner label { display: grid; grid-template-columns: 120px 1fr 48px; gap: 10px; align-items: center; }

/* ---------- 服務卡 ---------- */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
@media (max-width: 960px) { .cards { grid-template-columns: 1fr; } }
.card {
  position: relative; padding: 32px 30px 34px; border-radius: var(--radius);
  background: linear-gradient(180deg, var(--bg-2), var(--bg-1)); border: 1px solid var(--line);
  transition: border-color .4s, transform .4s;
}
.card:hover { border-color: var(--line-2); transform: translateY(-3px); }
.card::before {  /* 卡片頂端一道細細的金光 */
  content: ''; position: absolute; left: 30px; right: 30px; top: -1px; height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold), transparent); opacity: .45;
}
.card-feature { border-color: rgba(var(--ai-rgb),.25); }
.card-feature::before { background: linear-gradient(90deg, transparent, var(--ai), transparent); opacity: .7; }
.card-top { display: flex; justify-content: space-between; align-items: center; margin-bottom: 26px; }
.num { font-family: var(--font-serif); font-size: 15px; color: var(--text-3); letter-spacing: .2em; }
.ico { width: 28px; height: 28px; color: var(--gold); }
.card-feature .ico { color: var(--ai); }
.card h3 { font-family: var(--font-serif); font-weight: 600; font-size: 22px; letter-spacing: .08em; margin: 0 0 6px; }
.card-sub { color: var(--gold); font-size: 14px; letter-spacing: .1em; margin: 0 0 16px; }
.card-feature .card-sub { color: var(--ai); }
.card p { color: var(--text-2); font-size: 15px; margin: 0; }
.card-link { display: inline-flex; align-items: center; gap: 6px; margin-top: 22px; font-size: 14px; color: var(--ai); letter-spacing: .1em; }
.card-link svg { width: 16px; height: 16px; transition: transform .3s; }
.card-link:hover svg { transform: translateX(4px); }

/* ---------- 數位攝影棚 ---------- */
.studio { background: radial-gradient(80% 60% at 50% 0%, rgba(var(--ai-rgb),.06), transparent 70%), rgba(17,14,11,.55); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.studio .kicker { color: var(--ai); }
.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px; margin-bottom: 64px; }
@media (max-width: 960px) { .features { grid-template-columns: 1fr; gap: 28px; } }
.feature { border-left: 1px solid var(--line-2); padding-left: 22px; }
.f-num { font-family: var(--font-serif); font-style: italic; color: var(--ai); font-size: 15px; letter-spacing: .1em; }
.feature h3 { font-family: var(--font-serif); font-weight: 600; font-size: 19px; letter-spacing: .06em; margin: 6px 0 10px; }
.feature p { color: var(--text-2); font-size: 15px; margin: 0; }

/* 出圖流程：六個節點串在一條線上，AI 那一站用青綠 */
.flow { list-style: none; margin: 0 0 22px; padding: 0; display: grid; grid-auto-flow: column; grid-auto-columns: 1fr; position: relative; }
.flow::before { content: ''; position: absolute; left: 8%; right: 8%; top: 9px; height: 1px; background: linear-gradient(90deg, var(--gold), var(--ai) 60%, var(--gold)); opacity: .5; }
.flow li { position: relative; text-align: center; padding-top: 34px; font-size: 14px; color: var(--text-2); letter-spacing: .06em; }
.flow li::before { content: ''; position: absolute; left: 50%; top: 3px; width: 13px; height: 13px; margin-left: -6.5px; border-radius: 50%; background: var(--bg-1); border: 1px solid var(--gold); box-shadow: 0 0 12px rgba(242,179,92,.4); }
.flow li.ai::before { border-color: var(--ai); background: var(--ai); box-shadow: 0 0 16px var(--ai); }
.flow li.ai { color: var(--ai); }
@media (max-width: 760px) {
  .flow { grid-auto-flow: row; grid-template-columns: 1fr; gap: 18px; padding-left: 8px; }
  .flow::before { left: 14px; right: auto; top: 10px; bottom: 10px; width: 1px; height: auto; background: linear-gradient(180deg, var(--gold), var(--ai) 60%, var(--gold)); }
  .flow li { text-align: left; padding: 0 0 0 34px; }
  .flow li::before { left: 0; top: 7px; margin-left: 0; }
}
.note { color: var(--text-3); font-size: 13px; margin: 18px 0 0; }

/* ---------- 自有產品：首頁兩張入口卡 ---------- */
.prods { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
@media (max-width: 860px) { .prods { grid-template-columns: 1fr; } }
.prod {
  position: relative; display: block; padding: 34px 32px 32px; border-radius: var(--radius);
  background: linear-gradient(160deg, rgba(34,27,21,.85), rgba(20,16,12,.85)); border: 1px solid var(--line);
  transition: border-color .4s, transform .4s;
}
.prod:hover { border-color: rgba(var(--ai-rgb),.35); transform: translateY(-3px); }
.prod-kicker { font-size: 12px; letter-spacing: .3em; color: var(--ai); margin-bottom: 14px; display: flex; align-items: center; flex-wrap: wrap; gap: 10px; }
.prod h3 { font-family: var(--font-serif); font-weight: 600; font-size: 26px; letter-spacing: .08em; margin: 0 0 6px; }
.prod-sub { color: var(--gold); font-size: 15px; letter-spacing: .08em; margin: 0 0 14px; }
.prod p { color: var(--text-2); font-size: 15px; margin: 0; }
.prod .card-link { margin-top: 22px; }
.badge {
  display: inline-block; font-size: 12px; letter-spacing: .12em; padding: 3px 10px; border-radius: 999px; margin-left: 12px;
  color: var(--ai); border: 1px solid rgba(var(--ai-rgb),.45); background: rgba(var(--ai-rgb),.08); text-transform: none;
}
.prod-kicker .badge { margin-left: 0; }

/* ---------- 產品頁 ---------- */
.page-sub main { padding-top: 60px; }
.page-head { padding-bottom: 72px; }
.page-title { font-size: clamp(30px, 4vw, 50px); }
.prod-jump { display: flex; gap: 28px; flex-wrap: wrap; font-size: 15px; letter-spacing: .1em; color: var(--text-2); }
.prod-jump a { display: inline-flex; align-items: center; gap: 10px; }
.prod-jump a:hover { color: var(--gold); }
.prod-jump .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--gold); box-shadow: 0 0 10px var(--gold); }
.prod-jump .dot.ai { background: var(--ai); box-shadow: 0 0 10px var(--ai); }
.product-cs { border-bottom: 1px solid var(--line); }
.product-cs .kicker { color: var(--ai); }
.fit {
  margin: 0 0 60px; padding: 28px 32px; border-radius: var(--radius);
  border: 1px solid var(--line); background: rgba(17,14,11,.55);
}
.fit h3 { font-family: var(--font-serif); font-weight: 600; font-size: 19px; letter-spacing: .08em; margin: 0 0 12px; }
.fit ul { margin: 0; padding-left: 1.2em; color: var(--text-2); font-size: 15px; }
.fit li { margin: 6px 0; }
.fit li::marker { color: var(--gold); }
.prod-cta { margin-top: 36px; }
.nav a[aria-current="page"] { color: var(--gold); }

/* ---------- 產品主題色：區塊內覆寫 --ai，底下所有用 var(--ai) 的元件自動換色 ----------
   品牌色（土壤／暖金／AI 青綠）掌管整站；產品色只在自己的區塊與入口卡出現。
   數位攝影棚＝珊瑚橘（攝影棚打光的暖色，和品牌暖金同一家族），輔色淡紫、奶油
   LINE AI 客服＝接近 LINE 的綠 */
.theme-studio { --ai: #ff8a65; --ai-rgb: 255,138,101; --ai-2: #b9a3ff; }
.theme-cs { --ai: #06c755; --ai-rgb: 6,199,85; --cs-green-deep: #06a64a; }
:root { --cs-green-deep: #06a64a; }

/* 捲到哪個產品，整個畫面暈染上那個產品的色調（兩層固定遮罩交叉淡入淡出） */
.zone-tint { position: fixed; inset: 0; z-index: 0; pointer-events: none; opacity: 0; transition: opacity 1.1s ease; }
.zone-tint.studio { background: radial-gradient(70% 60% at 85% 20%, rgba(255,138,101,.16), transparent 70%), radial-gradient(60% 50% at 10% 90%, rgba(185,163,255,.12), transparent 70%); }
.zone-tint.cs { background: radial-gradient(70% 60% at 15% 25%, rgba(6,199,85,.15), transparent 70%), radial-gradient(60% 50% at 90% 85%, rgba(6,199,85,.08), transparent 70%); }
html[data-zone="studio"] .zone-tint.studio, html[data-zone="cs"] .zone-tint.cs { opacity: 1; }
@media (prefers-reduced-motion: reduce) { .zone-tint { transition: none; } }

/* 攝影棚區塊背景：傾斜的拼貼牆（寫實、卡通、3D 底圖穿插色塊），緩慢飄移＋捲動視差，上面壓暗色漸層保證可讀 */
.studio.theme-studio { overflow: hidden; background: rgba(17,14,11,.5); }
.studio.theme-studio > .wrap { position: relative; z-index: 1; }
.collage { position: absolute; inset: 0; z-index: 0; pointer-events: none; overflow: hidden; }
.collage-track {
  position: absolute; left: 50%; top: 50%; width: 170%; transform: translate(-50%, calc(-50% + var(--shift, 0px))) rotate(-9deg);
  display: grid; grid-template-columns: repeat(6, 1fr); gap: 16px;
}
.collage-col { display: flex; flex-direction: column; gap: 16px; animation: drift 46s ease-in-out infinite alternate; }
.collage-col:nth-child(even) { animation-direction: alternate-reverse; animation-duration: 58s; }
.collage-col > * { border-radius: 14px; overflow: hidden; }
.collage-col img { display: block; width: 100%; height: auto; }
.collage .blk { aspect-ratio: 1 / 1; }
.collage .blk.tall { aspect-ratio: 3 / 4; }
.blk.c1 { background: #ff8a65; } .blk.c2 { background: #b9a3ff; } .blk.c3 { background: #f3e2c7; }
.blk.c4 { background: #f2b35c; } .blk.c5 { background: #2b2019; border: 1px solid #3a3027; }
@keyframes drift { from { transform: translateY(-4%); } to { transform: translateY(4%); } }
.collage::after {
  content: ''; position: absolute; inset: 0;
  background:
    linear-gradient(180deg, rgba(20,15,11,.9) 0%, rgba(20,15,11,.6) 18%, rgba(20,15,11,.64) 60%, rgba(20,15,11,.92) 100%),
    radial-gradient(60% 40% at 50% 30%, rgba(20,15,11,.3), transparent);
}
@media (prefers-reduced-motion: reduce) { .collage-col { animation: none; } }
@media (max-width: 700px) { .collage-track { grid-template-columns: repeat(4, 1fr); width: 220%; } }
/* 拼貼上的內容卡片加厚底色 */
.theme-studio .mode, .theme-studio .fit { background: rgba(20,15,11,.86); backdrop-filter: blur(6px); }

/* 首頁產品入口卡也用各自的產品色 */
.prod.theme-studio .prod-sub, .prod.theme-cs .prod-sub { color: var(--ai); }

/* ---------- 燈箱 ---------- */
.lb { position: fixed; inset: 0; z-index: 50; display: flex; flex-direction: column; align-items: center; justify-content: center; padding: 64px 72px 96px; }
.lb[hidden] { display: none !important; }
.lb-backdrop { position: absolute; inset: 0; background: rgba(16,12,9,.9); backdrop-filter: blur(14px); opacity: 0; transition: opacity .35s ease; }
.lb.open .lb-backdrop { opacity: 1; }
.lb-stage { position: relative; flex: 1; width: 100%; display: flex; align-items: center; justify-content: center; min-height: 0; }
.lb-img { max-width: 100%; max-height: 100%; border-radius: 10px; box-shadow: 0 30px 90px rgba(0,0,0,.6); transform-origin: top left; will-change: transform; user-select: none; -webkit-user-drag: none; }
.lb-cap { position: absolute; left: 0; right: 0; bottom: 26px; text-align: center; color: var(--text-2); font-size: 14px; padding: 0 20px; opacity: 0; transition: opacity .3s .15s; }
.lb.open .lb-cap { opacity: 1; }
.lb-cap b { color: var(--text-1); font-weight: 500; margin-right: 8px; }
.lb-count { color: var(--text-3); margin-left: 10px; letter-spacing: .1em; }
.lb-btn {
  position: absolute; width: 46px; height: 46px; border-radius: 50%; border: 1px solid var(--line-2); background: rgba(20,15,11,.7);
  color: var(--text-1); cursor: pointer; display: flex; align-items: center; justify-content: center; transition: border-color .25s, color .25s;
}
.lb-btn:hover { border-color: var(--ai); color: var(--ai); }
.lb-btn svg { width: 24px; height: 24px; }
.lb-close { top: 16px; right: 16px; }
.lb-prev { left: 16px; top: 50%; margin-top: -23px; }
.lb-next { right: 16px; top: 50%; margin-top: -23px; }
@media (max-width: 700px) { .lb { padding: 64px 12px 90px; } .lb-prev, .lb-next { top: auto; bottom: 18px; margin: 0; } .lb-prev { left: 16px; } .lb-next { right: 16px; } .lb-cap { bottom: 72px; } }
/* 可點開的圖：游標與提示 */
[data-lightbox] { cursor: zoom-in; display: block; }
.cmp-zoom {
  position: absolute; top: 10px; right: 10px; z-index: 2; width: 36px; height: 36px; border-radius: 50%;
  border: 1px solid rgba(255,255,255,.2); background: rgba(10,8,7,.65); color: var(--text-1); cursor: zoom-in;
  display: flex; align-items: center; justify-content: center; backdrop-filter: blur(4px); transition: border-color .25s, color .25s;
}
.cmp-zoom:hover { border-color: var(--ai); color: var(--ai); }
.mode:not(.mode-toon) .cmp-zoom:hover { border-color: var(--gold); color: var(--gold); }
.cmp-zoom svg { width: 18px; height: 18px; }

/* ---------- 產品頁：數位攝影棚兩種模式＋前後對照滑桿 ---------- */
.modes { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; margin: 8px 0 64px; }
@media (max-width: 900px) { .modes { grid-template-columns: 1fr; } }
.mode { padding: 22px; border-radius: var(--radius); border: 1px solid var(--line); background: rgba(17,14,11,.6); }
.mode-head { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; flex-wrap: wrap; }
.mode-tag { font-size: 13px; letter-spacing: .14em; padding: 4px 12px; border-radius: 999px; color: var(--gold); border: 1px solid rgba(242,179,92,.5); background: rgba(242,179,92,.08); }
.mode-tag.ai { color: var(--ai); border-color: rgba(var(--ai-rgb),.5); background: rgba(var(--ai-rgb),.08); }
.mode-use { font-size: 13px; color: var(--text-3); letter-spacing: .08em; }
.mode-promise { color: var(--text-2); font-size: 15px; margin: 18px 0 6px; }
.mode-promise b { color: var(--text-1); font-weight: 500; }
.mode-source { color: var(--text-3); font-size: 13px; margin: 0; }

.compare {
  --pos: 50%; position: relative; aspect-ratio: 1 / 1; border-radius: 10px; overflow: hidden;
  cursor: ew-resize; touch-action: pan-y; user-select: none; background: var(--bg-2);
}
.compare img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; pointer-events: none; -webkit-user-drag: none; }
.cmp-top { position: absolute; inset: 0; clip-path: inset(0 0 0 var(--pos)); }
.cmp-bar { position: absolute; top: 0; bottom: 0; left: var(--pos); width: 2px; margin-left: -1px; background: var(--gold); box-shadow: 0 0 14px rgba(242,179,92,.7); pointer-events: none; }
.mode-toon .cmp-bar { background: var(--ai); box-shadow: 0 0 14px rgba(var(--ai-rgb),.7); }
.cmp-bar span { position: absolute; top: 50%; left: 50%; width: 34px; height: 34px; margin: -17px 0 0 -17px; border-radius: 50%; background: rgba(10,8,7,.75); border: 1.5px solid currentColor; color: var(--gold); backdrop-filter: blur(4px); }
.mode-toon .cmp-bar span { color: var(--ai); }
.cmp-bar span::before, .cmp-bar span::after { content: ''; position: absolute; top: 50%; width: 0; height: 0; margin-top: -5px; border: 5px solid transparent; }
.cmp-bar span::before { left: 5px; border-right-color: currentColor; }
.cmp-bar span::after { right: 5px; border-left-color: currentColor; }
.cmp-label { position: absolute; bottom: 12px; font-size: 12px; letter-spacing: .12em; padding: 3px 10px; border-radius: 999px; background: rgba(10,8,7,.7); color: var(--text-1); pointer-events: none; }
.cmp-label.l { left: 12px; } .cmp-label.r { right: 12px; }
.cmp-range { position: absolute; inset: auto 0 0 0; width: 100%; opacity: 0; height: 1px; pointer-events: none; }
.compare:focus-within { outline: 2px solid var(--gold); outline-offset: 3px; }

/* 同一場景、多種尺寸：依比例排成一列，高度對齊 */
.sizes { margin: 0 0 64px; }
.sizes-head h3 { font-family: var(--font-serif); font-weight: 600; font-size: 20px; letter-spacing: .06em; margin: 0 0 4px; }
.sizes-head p { color: var(--text-3); font-size: 14px; margin: 0 0 18px; }
/* 每張的寬度依比例分配（--r＝寬/高），四張高度自動對齊、剛好排滿一列 */
.sizes-row { display: flex; gap: 14px; align-items: flex-start; }
.sizes-row figure { margin: 0; flex: var(--r) 1 0; min-width: 0; }
.sizes-row img { display: block; width: 100%; height: auto; border-radius: 8px; border: 1px solid var(--line-2); }
.sizes-row figcaption { font-size: 12px; color: var(--text-3); margin-top: 8px; letter-spacing: .08em; }
@media (max-width: 700px) {
  .sizes-row { overflow-x: auto; padding-bottom: 6px; }
  .sizes-row figure { flex: 0 0 auto; }
  .sizes-row img { height: 180px; width: auto; }
}

/* ---------- 產品頁：LINE AI 客服對話重播＋透視面板 ---------- */
.cs-demo { display: grid; grid-template-columns: 380px 1fr; gap: 56px; align-items: center; margin: 8px 0 72px; }
@media (max-width: 900px) { .cs-demo { grid-template-columns: 1fr; gap: 40px; } }
.cs-demo figure { margin: 0; }
.cs-demo figcaption { color: var(--text-3); font-size: 13px; margin-top: 14px; line-height: 1.7; }
.cs-demo figcaption b { color: var(--text-1); font-weight: 500; }
.cs-phone-wrap { justify-self: center; width: 100%; max-width: 380px; }
.cs-phone {
  position: relative; height: 640px; border-radius: 42px; padding: 14px; display: flex; flex-direction: column;
  background: linear-gradient(160deg, #2a221b, #120e0b); border: 1px solid var(--line-2);
  box-shadow: 0 30px 80px rgba(0,0,0,.55), 0 0 60px rgba(var(--ai-rgb),.08), inset 0 0 0 1px rgba(255,255,255,.03);
}
.cs-phone > * { background: #f4f1ec; }
.cs-top { border-radius: 30px 30px 0 0; padding: 22px 20px 12px; border-bottom: 1px solid #e3ddd4; }
.cs-store { font-weight: 700; color: #1d1813; font-size: 16px; }
.cs-store span { display: block; font-weight: 400; color: #8b8076; font-size: 12px; margin-top: 2px; }
.cs-scene { margin-top: 8px; font-size: 12px; color: var(--cs-green-deep); letter-spacing: .08em; min-height: 1em; }
.cs-chat { flex: 1; overflow: hidden; padding: 14px 12px; display: flex; flex-direction: column; gap: 10px; scroll-behavior: smooth; }
.cs-msg { display: flex; align-items: flex-end; gap: 6px; animation: csIn .35s ease-out; }
.cs-msg.user { justify-content: flex-end; }
.cs-bubble { max-width: 82%; padding: 9px 12px; border-radius: 16px; font-size: 13px; line-height: 1.6; white-space: pre-line; letter-spacing: 0; }
.cs-msg.user .cs-bubble { background: var(--cs-green-deep); color: #fff; border-bottom-right-radius: 5px; }
.cs-msg.bot .cs-bubble { background: #fff; color: #231c16; border: 1px solid #e7e1d8; border-bottom-left-radius: 5px; }
.cs-meta { font-size: 11px; color: #9a8f84; white-space: nowrap; }
.cs-handoff { margin-top: 8px; padding: 5px 9px; border-radius: 8px; background: #fdf1e6; color: #a8521d; font-size: 12px; }
.cs-typing { display: inline-flex; gap: 4px; padding: 12px 14px; }
.cs-typing i { width: 6px; height: 6px; border-radius: 50%; background: #b3a89c; animation: csDot 1.1s infinite; }
.cs-typing i:nth-child(2) { animation-delay: .18s; } .cs-typing i:nth-child(3) { animation-delay: .36s; }
@keyframes csDot { 0%, 60%, 100% { opacity: .35; transform: translateY(0); } 30% { opacity: 1; transform: translateY(-3px); } }
@keyframes csIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
.cs-compose { border-radius: 0 0 30px 30px; padding: 12px 14px 18px; display: flex; gap: 8px; align-items: center; border-top: 1px solid #e3ddd4; }
.cs-compose span { flex: 1; border: 1.5px solid var(--cs-green-deep); border-radius: 12px; padding: 8px 12px; font-size: 12px; color: #9a8f84; }
.cs-compose i { width: 34px; height: 34px; border-radius: 10px; background: var(--cs-green-deep); }
.cs-see img { width: 100%; max-width: 560px; border-radius: 16px; border: 1px solid var(--line-2); box-shadow: 0 24px 70px rgba(0,0,0,.5); }
@media (prefers-reduced-motion: reduce) { .cs-msg { animation: none; } .cs-typing i { animation: none; } }

/* ---------- 合作方式 ---------- */
.steps { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
@media (max-width: 960px) { .steps { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .steps { grid-template-columns: 1fr; } }
.step { padding: 26px 24px; border-top: 1px solid var(--line-2); }
.s-num { display: block; font-family: var(--font-serif); font-size: 44px; line-height: 1; color: transparent; -webkit-text-stroke: 1px var(--gold); margin-bottom: 18px; }
.step h3 { font-family: var(--font-serif); font-weight: 600; font-size: 19px; letter-spacing: .08em; margin: 0 0 8px; }
.step p { color: var(--text-2); font-size: 15px; margin: 0; }

/* ---------- 為什麼選擇微壤 ---------- */
.why { background: rgba(17,14,11,.5); border-top: 1px solid var(--line); }
.whys { display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px; }
@media (max-width: 860px) { .whys { grid-template-columns: 1fr; gap: 30px; } }
.why-item .ico { margin-bottom: 14px; }
.why-item h3 { font-family: var(--font-serif); font-weight: 600; font-size: 20px; letter-spacing: .08em; margin: 0 0 8px; }
.why-item p { color: var(--text-2); font-size: 15px; margin: 0; }

/* ---------- 聯絡 ---------- */
.contact { background: radial-gradient(60% 70% at 50% 100%, rgba(242,179,92,.10), transparent 70%); }
.mail { margin-top: 16px; color: var(--text-3); font-size: 14px; letter-spacing: .08em; }

/* ---------- 頁尾 ---------- */
.foot { border-top: 1px solid var(--line); padding: 34px 0; font-size: 13px; color: var(--text-3); }
.foot-row { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.foot-brand { font-family: var(--font-serif); letter-spacing: .14em; color: var(--text-2); }

/* ---------- 進場動畫的初始狀態（JS 有跑才套用；沒跑或關動畫時直接顯示） ---------- */
.js-anim .reveal { opacity: 0; transform: translateY(18px); }
.js-anim .hero-text > * { opacity: 0; transform: translateY(14px); }
.title .ch { display: inline-block; }
.js-anim .title.split .ch { opacity: 0; }

/* ---------- 捲動互動 ---------- */
.hero-text { will-change: transform, opacity; }

/* 服務卡：滑鼠傾斜時轉場要短，不然會黏；光跟著游標 */
.card.lit { transition: transform .12s ease-out, border-color .4s; }
.card::after {
  content: ''; position: absolute; inset: 0; border-radius: inherit; pointer-events: none; opacity: 0; transition: opacity .4s;
  background: radial-gradient(360px circle at var(--mx, 50%) var(--my, 50%), rgba(242,179,92,.10), transparent 60%);
}
.card-feature::after { background: radial-gradient(360px circle at var(--mx, 50%) var(--my, 50%), rgba(var(--ai-rgb),.10), transparent 60%); }
.card.lit::after { opacity: 1; }

/* 攝影棚流程：亮線隨捲動填滿（--flow 0～1），節點依序點亮 */
.flow::before { background: var(--line-2); opacity: 1; }
.flow::after {
  content: ''; position: absolute; left: 8%; right: 8%; top: 9px; height: 1px;
  background: linear-gradient(90deg, var(--gold), var(--ai) 60%, var(--gold)); box-shadow: 0 0 8px rgba(242,179,92,.5);
  transform: scaleX(var(--flow, 1)); transform-origin: left center;
}
.flow li::before { border-color: var(--line-2); box-shadow: none; transition: border-color .5s, box-shadow .5s, background .5s; }
.flow li { transition: color .5s; color: var(--text-3); }
.flow li.lit { color: var(--text-2); }
.flow li.lit::before { border-color: var(--gold); box-shadow: 0 0 12px rgba(242,179,92,.45); }
.flow li.ai { color: var(--text-3); }
.flow li.ai:not(.lit)::before { background: var(--bg-1); border-color: var(--line-2); box-shadow: none; }   /* 蓋掉舊樣式：沒點亮前不能先亮 */
.flow li.ai.lit { color: var(--ai); }
.flow li.ai.lit::before { border-color: var(--ai); background: var(--ai); box-shadow: 0 0 18px var(--ai); }
@media (max-width: 760px) {
  .flow::after { left: 14px; right: auto; top: 10px; bottom: 10px; width: 1px; height: auto; background: linear-gradient(180deg, var(--gold), var(--ai) 60%, var(--gold)); transform: scaleY(var(--flow, 1)); transform-origin: center top; }
}

/* 合作方式：空心數字依序填滿金色 */
.s-num { transition: color .6s, text-shadow .6s; }
.step.lit .s-num { color: var(--gold); text-shadow: 0 0 24px rgba(242,179,92,.35); }
.step { transition: border-color .6s; }
.step.lit { border-top-color: rgba(242,179,92,.5); }

/* 深度指示：右側一條根，光點隨捲動往下；段落名稱滑過才出現 */
.depth {
  position: fixed; right: 26px; top: 50%; transform: translateY(-50%); z-index: 12; height: 44vh; width: 14px;
  opacity: 0; pointer-events: none; transition: opacity .6s;
}
.depth.show { opacity: 1; pointer-events: auto; }
.depth-line { position: absolute; left: 6px; top: 0; bottom: 0; width: 1px; background: linear-gradient(transparent, var(--line-2) 8%, var(--line-2) 92%, transparent); }
.depth-dot { position: absolute; left: -3px; width: 7px; height: 7px; margin-top: -3.5px; border-radius: 50%; background: var(--gold); box-shadow: 0 0 12px var(--gold); }
.depth-tick { position: absolute; right: 0; width: 14px; height: 14px; margin-top: -7px; display: flex; align-items: center; justify-content: flex-end; }
.depth-tick::before { content: ''; width: 5px; height: 1px; background: var(--text-3); position: absolute; left: 4px; transition: width .3s, background .3s; }
.depth-tick span { position: absolute; right: 22px; white-space: nowrap; font-size: 12px; letter-spacing: .14em; color: var(--text-3); opacity: 0; transform: translateX(6px); transition: opacity .3s, transform .3s, color .3s; }
.depth-tick:hover span, .depth-tick.active span { opacity: 1; transform: none; }
.depth-tick.active span { color: var(--gold); }
.depth-tick.active::before { background: var(--gold); width: 9px; left: 2px; }
@media (max-width: 1100px) { .depth { display: none; } }

/* ── AI 助理對話窗（chat-widget.js，只在中文頁）──────────────── */
.hc-fab {
  position: fixed; right: 20px; bottom: 20px; z-index: 30;
  display: inline-flex; align-items: center; gap: 8px; padding: 12px 18px 12px 14px;
  border: 1px solid rgba(var(--ai-rgb), .45); border-radius: 999px; cursor: pointer;
  background: rgba(17, 14, 11, .92); color: var(--text-1); font: 500 15px/1 var(--font-sans);
  box-shadow: 0 6px 24px rgba(0,0,0,.45), 0 0 0 0 rgba(var(--ai-rgb), .0);
  transition: border-color .2s, box-shadow .2s, transform .2s;
}
.hc-fab:hover, .hc-fab:focus-visible { border-color: var(--ai); box-shadow: 0 6px 24px rgba(0,0,0,.45), 0 0 18px rgba(var(--ai-rgb), .25); }
.hc-fab svg, .hc-x svg, .hc-send svg { width: 20px; height: 20px; fill: currentColor; flex: none; }
.hc-fab svg { color: var(--ai); }
.hc-fab.hc-hidden { opacity: 0; pointer-events: none; transform: translateY(8px); }
.hc-panel {
  position: fixed; right: 20px; bottom: 20px; z-index: 31;
  width: min(380px, calc(100vw - 40px)); height: min(560px, calc(100vh - 120px));
  display: flex; flex-direction: column; overflow: hidden;
  background: var(--bg-1); color: var(--text-1); border: 1px solid var(--line-2); border-radius: var(--radius);
  box-shadow: 0 18px 48px rgba(0,0,0,.6); font-family: var(--font-sans);
  animation: hc-in .22s ease-out;
}
.hc-panel[hidden] { display: none; }
@keyframes hc-in { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }
.hc-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; padding: 14px 14px 12px 18px; border-bottom: 1px solid var(--line); }
.hc-head strong { display: block; font-size: 16px; color: var(--text-1); }
.hc-sub { display: block; margin-top: 3px; font-size: 12.5px; color: var(--text-3); }
.hc-x { border: 0; background: none; color: var(--text-2); cursor: pointer; padding: 4px; border-radius: 6px; }
.hc-x:hover, .hc-x:focus-visible { color: var(--text-1); background: var(--bg-2); }
.hc-log { flex: 1; overflow-y: auto; padding: 14px 14px 6px; display: flex; flex-direction: column; gap: 10px; }
.hc-msg { max-width: 86%; padding: 9px 13px; border-radius: 12px; font-size: 14.5px; line-height: 1.65; white-space: pre-wrap; word-break: break-word; }
.hc-bot { align-self: flex-start; background: var(--bg-2); border: 1px solid var(--line); }
.hc-me { align-self: flex-end; background: rgba(var(--ai-rgb), .14); border: 1px solid rgba(var(--ai-rgb), .3); }
.hc-wait { color: var(--text-3); }
.hc-actions { display: flex; flex-wrap: wrap; gap: 8px; }
.hc-act {
  border: 1px solid var(--gold); border-radius: 999px; padding: 6px 14px; background: none; cursor: pointer;
  color: var(--gold-2); font: 500 13.5px/1.2 var(--font-sans); text-decoration: none;
}
.hc-act:hover, .hc-act:focus-visible { background: rgba(242,179,92,.12); }
.hc-cbbar { display: flex; justify-content: flex-end; padding: 8px 12px 0; }
.hc-lead { align-self: stretch; display: flex; flex-direction: column; gap: 8px; padding: 12px; border-radius: 12px; background: var(--bg-2); border: 1px solid rgba(242,179,92,.35); }
.hc-lead-intro { margin: 0; font-size: 13.5px; line-height: 1.6; color: var(--text-2); }
.hc-field { display: flex; flex-direction: column; gap: 4px; font-size: 12.5px; color: var(--text-3); }
.hc-field .hc-input { flex: none; }
.hc-consent { display: flex; gap: 8px; align-items: flex-start; font-size: 12px; line-height: 1.55; color: var(--text-2); }
.hc-consent input { margin-top: 3px; accent-color: var(--gold); }
.hc-err { margin: 0; min-height: 1em; font-size: 12.5px; color: var(--ember); }
.hc-primary { background: var(--gold); color: #1a140f; }
.hc-primary:hover, .hc-primary:focus-visible { background: var(--gold-2); }
.hc-primary:disabled { opacity: .6; cursor: wait; }
.hc-note { margin: 0; padding: 8px 16px; font-size: 11.5px; line-height: 1.55; color: var(--text-3); border-top: 1px solid var(--line); }
.hc-form { display: flex; align-items: flex-end; gap: 8px; padding: 10px 12px 12px; border-top: 1px solid var(--line); }
.hc-input {
  flex: 1; resize: none; max-height: 120px; padding: 9px 12px; border-radius: 10px;
  border: 1px solid var(--line-2); background: var(--bg-0); color: var(--text-1); font: 14.5px/1.5 var(--font-sans);
}
.hc-input:focus { outline: none; border-color: var(--ai); }
.hc-send { border: 0; border-radius: 10px; padding: 9px; background: var(--ai); color: #0d1a17; cursor: pointer; }
.hc-send:disabled, .hc-input:disabled { opacity: .5; cursor: not-allowed; }
@media (max-width: 520px) {
  .hc-fab { right: 14px; bottom: 14px; }
  /* 手機：左右貼邊不用 100vw；高度用 dvh（跟著網址列伸縮），舊瀏覽器退回 vh */
  .hc-panel {
    left: 0; right: 0; bottom: 0; width: auto;
    height: 85vh; height: 85dvh; max-height: 85dvh;
    border-radius: var(--radius) var(--radius) 0 0;
  }
  /* iOS Safari 遇到字級 < 16px 的輸入框會自動放大整頁，放大後對話窗就超出螢幕 */
  .hc-input { font-size: 16px; }
}
@media (prefers-reduced-motion: reduce) { .hc-panel { animation: none; } .hc-fab { transition: none; } }