/* 騰騏設計 TUNE CHIC DESIGN — 官網設計 tokens & 全站樣式 (深色灰階版) */
:root {
  /* 色彩 — 深色灰階 */
  --c-bg: #16181A;                       /* 全站底色 (冷調近黑) */
  --c-text: #F0F1EE;                     /* 主文字/標題 (米白) */
  --c-mut: rgba(240, 241, 238, 0.62);    /* 次要文字、導覽 */
  --c-faint: rgba(240, 241, 238, 0.45);  /* 標籤欄位名 */
  --c-dim: rgba(240, 241, 238, 0.40);    /* 版權、註記 */
  --c-accent: #AEB7B2;                   /* 灰綠 accent: hover、CTA 底線、獎項結果 */
  --c-hair: rgba(240, 241, 238, 0.16);   /* hairline 細線 */
  --c-veil: rgba(20, 22, 24, 0.65);      /* hero 深玻璃 */
  --c-glass: rgba(20, 22, 24, 0.45);     /* 得獎卡等深色玻璃面板 */
  --c-header: rgba(22, 24, 26, 0.55);    /* 固定 header 半透明底 */

  /* 字型 */
  --font-sans: "PingFang TC", "Microsoft JhengHei", "Noto Sans TC", sans-serif;
  --font-display: "Didot", "Bodoni 72", "Playfair Display", Georgia, serif;

  /* 四階字級 (字級 token 應為 4 個，只使用字母，避免數值檢查錯誤) */
  --fs-title: 30px;       /* 頁面大標 */
  --fs-sub: 20px;         /* 卡片標題、流程步驟標題 */
  --fs-body: 15px;        /* 內文 */
  --fs-small: 13px;       /* 說明、eyebrow、版權 */

  /* 字重 */
  --fw-light: 300;
  --fw-regular: 400;
  --fw-medium: 500;

  /* 字距 */
  --ls-wide: 0.18em;      /* 導覽、eyebrow、品牌字 */
  --ls-cta: 0.14em;       /* CTA 連結 */
  --ls-title: 0.06em;     /* 中文標題 */
  --ls-body: 0.04em;      /* 內文 */

  /* 行高 */
  --lh-body: 1.9;
  --lh-title: 1.02;

  /* 間距 */
  --wrap-max: 1200px;
  --pad-x: clamp(20px, 5vw, 48px);
  --sec-pad-top: clamp(72px, 12vw, 120px);
  --sec-pad-bot: clamp(60px, 10vw, 100px);
  --main-pad-top: clamp(110px, 18vw, 160px);
  --gap-card: 40px;
  --gap-col: clamp(28px, 4vw, 48px);

  /* 效果 */
  --blur-header: 12px;
  --blur-veil: 7px;
  --shadow-hero-text: 0 15px 34px rgba(0, 0, 0, 0.47);
  --rim-hero-text: 0 1px 0 rgba(255, 255, 255, 0.19);
}

/* 全域重設與基礎 */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  background: var(--c-bg);
  color: var(--c-mut);
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  font-weight: var(--fw-light);
  line-height: var(--lh-body);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; transition: color 0.3s ease; }
a:hover { color: var(--c-text); }
img { display: block; max-width: 100%; height: auto; -webkit-user-drag: none; user-select: none; }
h1, h2, h3, b, strong { color: var(--c-text); font-weight: var(--fw-regular); }
h1, h2, h3 { letter-spacing: var(--ls-title); }

.wrap { max-width: var(--wrap-max); margin: 0 auto; padding: 0 var(--pad-x); }

/* Header */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 80;
  background: var(--c-header);
  backdrop-filter: blur(var(--blur-header));
  -webkit-backdrop-filter: blur(var(--blur-header));
  border-bottom: 1px solid var(--c-hair);
}
.site-header .wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 4px 16px;
  min-height: 68px;
}
.brand { display: flex; align-items: center; gap: 14px; color: var(--c-text); }
.brand-logo { height: 34px; width: auto; display: block; }
.brand .mark { font-size: var(--fs-sub); font-weight: var(--fw-medium); letter-spacing: var(--ls-wide); }
.nav { display: flex; flex-wrap: wrap; gap: 12px clamp(14px, 3vw, 36px); font-size: var(--fs-small); letter-spacing: var(--ls-wide); }
.nav a { color: var(--c-mut); padding: 6px 0; }
.nav a:hover { color: var(--c-text); }
.nav a.active { color: var(--c-text); border-bottom: 1px solid var(--c-mut); padding-bottom: 4px; }

.nav-toggle { display: none; background: none; border: none; padding: 12px; cursor: pointer; }
.nav-toggle svg { display: block; }

/* Main Section Layout */
main {
  max-width: var(--wrap-max);
  margin: 0 auto;
  padding: var(--main-pad-top) var(--pad-x) var(--sec-pad-bot);
}

/* Eyebrow & Titles */
.eyebrow {
  margin: 0;
  font-size: var(--fs-small);
  letter-spacing: var(--ls-wide);
  color: var(--c-mut);
  font-weight: var(--fw-light);
}
.eyebrow::after {
  content: "";
  display: block;
  width: 40px;
  border-top: 1px solid var(--c-hair);
  margin-top: 10px;
}
.page-title {
  margin: 8px 0 0;
  font-size: var(--fs-title);
  font-weight: var(--fw-regular);
  color: var(--c-text);
}

/* Hero Section */
.hero {
  position: relative;
  height: 100vh;
  overflow: hidden;
  background: url(../img/hero-home.jpg) center / cover fixed;
}
/* iOS 等不支援 fixed 時改由 <img> 當底圖，供 veil 模糊與鏤空字對位 */
.hero-bg {
  display: none;
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  z-index: 0;
  pointer-events: none;
}
.hero--sync-bg {
  background: none;
}
.hero--sync-bg .hero-bg {
  display: block;
}
.hero-veil {
  position: absolute;
  inset: 0;
  z-index: 1;
  background: var(--c-veil);
  backdrop-filter: blur(7px) saturate(1.05);
  -webkit-backdrop-filter: blur(7px) saturate(1.05);
}
.hero-gradient {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 2;
  height: 140px;
  background: linear-gradient(180deg, rgba(22, 24, 26, 0) 0%, var(--c-bg) 100%);
}
.hero-content {
  position: relative;
  z-index: 10;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 0 6vw;
}
.hero-title-container { position: relative; }
.hero-title-ghost {
  position: absolute;
  inset: 0;
  z-index: 0;
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: calc(var(--fs-title) * 0 + 11.5vw);
  line-height: var(--lh-title);
  letter-spacing: 0.01em;
  color: rgba(0, 0, 0, 0.38);
  transform: translate(0.3vw, 0.47vw);
  filter: blur(4px);
}
.hero-title-real {
  position: relative;
  z-index: 1;
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: calc(var(--fs-title) * 0 + 11.5vw);
  line-height: var(--lh-title);
  letter-spacing: 0.01em;
  background: url(../img/hero-home.jpg) center / cover fixed;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  filter: drop-shadow(var(--shadow-hero-text)) drop-shadow(var(--rim-hero-text));
}
.hero--sync-bg .hero-title-real {
  background-attachment: scroll;
  background-repeat: no-repeat;
}
/* hero 圖載入失敗時的保險:實心字色取代鏤空,避免透明字整個消失 */
.hero--knockout-fallback .hero-title-real {
  background: none;
  -webkit-background-clip: initial;
  background-clip: initial;
  color: var(--c-text);
}
.hero-sub {
  margin: 28px 0 0;
  font-size: var(--fs-body);
  letter-spacing: var(--ls-cta);
  color: var(--c-text);
}
.hero-scroll {
  position: absolute;
  left: 6vw;
  bottom: 40px;
  z-index: 10;
  margin: 0;
  font-size: var(--fs-small);
  letter-spacing: 0.3em;
  color: var(--c-mut);
}
.hero-scroll-line {
  display: block;
  width: 1px;
  height: 44px;
  background: var(--c-mut);
  margin: 10px 0 0 2px;
}

/* Sections on Homepage */
.home-section {
  padding: var(--sec-pad-top) 0 var(--sec-pad-bot);
}
.home-section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 48px;
}
.home-section-link {
  margin: 0 0 6px;
  font-size: var(--fs-body);
  letter-spacing: var(--ls-cta);
  color: var(--c-text);
  border-bottom: 1px solid var(--c-accent);
  padding-bottom: 3px;
}
.home-section-link:hover {
  color: var(--c-accent);
}

/* Grid Layouts */
.grid-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 40px;
}
.grid-process {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: clamp(40px, 6vw, 64px) 56px;
  margin-top: 72px;
}
.grid-contact {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: clamp(40px, 6vw, 72px);
  margin-top: 64px;
  align-items: start;
}

/* Cards */
.project-card {
  display: block;
}
.project-card-img-wrap {
  position: relative;
  overflow: hidden;
}
.project-card img {
  display: block;
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  object-position: right bottom;
}
.project-card-meta {
  padding: 16px 2px 4px;
}
.project-card-cat {
  margin: 0;
  font-size: var(--fs-small);
  letter-spacing: var(--ls-wide);
  color: var(--c-mut);
}
.project-card-legacy {
  color: rgba(240, 241, 238, 0.35);
  margin-left: 4px;
}
.project-card-title {
  margin: 2px 0 0;
  font-size: var(--fs-sub);
  font-weight: var(--fw-regular);
  color: var(--c-text);
  letter-spacing: var(--ls-title);
  transition: color 0.3s ease;
}
.project-card:hover .project-card-title {
  color: var(--c-accent);
}

/* Awards Section */
.awards-summary {
  margin: 0;
  font-size: var(--fs-small);
  letter-spacing: var(--ls-title);
}
.awards-list {
  margin-top: 52px;
  columns: 300px 2;
  column-gap: 64px;
}
.award-item {
  break-inside: avoid;
  padding: 12px 0;
  border-top: 1px solid var(--c-hair);
  font-size: var(--fs-body);
}
.award-year {
  margin-right: 12px;
  font-size: var(--fs-small);
  color: var(--c-mut);
}
.award-title {
  font-weight: var(--fw-medium);
  color: var(--c-text);
}
.award-result {
  color: var(--c-accent);
  margin-left: 8px;
}

/* 得獎卡片模糊玻璃底版式 (跟 Hero 一致) */
.award-card-row {
  position: relative;
  display: flex;
  background-color: transparent;
  border: 1px solid var(--c-hair);
  margin-top: 48px;
  overflow: hidden;
  min-height: 520px;
}
.award-card-bg-photo {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 1;
}
.award-card-left {
  position: relative;
  z-index: 2;
  flex: 0 0 45%;
  min-width: 420px;
  padding: 48px;
  background: var(--c-glass);
  backdrop-filter: blur(14px) saturate(1.05);
  -webkit-backdrop-filter: blur(14px) saturate(1.05);
  color: var(--c-text);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  border-right: 1px solid rgba(255, 255, 255, 0.08);
}

/* 卡片內得獎樣式細調 (在暗色玻璃底上) */
.award-card-left h2 {
  margin: 0;
  font-weight: var(--fw-medium);
  color: var(--c-text) !important;
  letter-spacing: 0.06em;
}
.award-card-left .awards-summary {
  margin: 6px 0 24px;
  font-size: var(--fs-small);
  color: var(--c-dim) !important;
}
.award-card-left .awards-list {
  margin-top: 0;
  columns: 1;
}
.award-card-left .award-item {
  padding: 4px 0;
  border-top: none;
  font-size: var(--fs-body);
  color: #C4C5C1; /* 玻璃底上亮色字體 */
}
.award-card-left .award-year {
  margin-right: 12px;
  font-size: var(--fs-small);
  color: var(--c-mut);
  font-weight: var(--fw-regular);
}
.award-card-left .award-title {
  font-weight: var(--fw-regular);
  color: var(--c-text);
}
.award-card-left .award-result {
  color: var(--c-accent); /* 暖金木紋色點綴 */
  margin-left: 8px;
  font-weight: var(--fw-regular);
}
.award-card-left .award-divider {
  border: none;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  margin: 24px 0;
}
.award-card-left .award-logos-flex {
  display: flex;
  flex-wrap: wrap;
  gap: 16px 20px;
  align-items: center;
  margin-top: 12px;
  margin-bottom: 16px;
}
.award-card-left .award-logos-flex img {
  height: 24px;
  width: auto;
  object-fit: contain;
  display: block;
  opacity: 0.85;
  transition: opacity 0.3s ease;
}
.award-card-left .award-logos-flex img:hover {
  opacity: 1;
}
.award-card-left .home-section-link {
  display: inline-block;
  margin-top: 24px;
  color: var(--c-text) !important;
  border-bottom: 1px solid var(--c-text);
  width: fit-content;
  text-decoration: none;
  letter-spacing: 0.12em;
}
.award-card-left .home-section-link:hover {
  color: var(--c-accent) !important;
  border-bottom-color: var(--c-accent);
}

@media (max-width: 768px) {
  .award-card-row {
    flex-direction: column;
    min-height: auto;
  }
  .award-card-bg-photo {
    position: relative;
    height: 280px;
    order: 2;
  }
  .award-card-left {
    flex: 1 1 auto;
    min-width: 0;
    padding: 32px 24px;
    border-right: none;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    background: rgba(20, 22, 24, 0.75); /* 手機版提高透明度防刺眼，維持模糊 */
  }
}

/* Filters */
.filters-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 32px;
  margin-top: 40px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--c-hair);
  font-size: var(--fs-small);
  letter-spacing: var(--ls-cta);
}
.filters-bar button {
  background: none;
  border: none;
  cursor: pointer;
  padding: 0 0 6px;
  font: inherit;
  letter-spacing: var(--ls-cta);
  color: var(--c-mut);
  border-bottom: 1px solid transparent;
  transition: color 0.3s ease, border-color 0.3s ease;
}
.filters-bar button:hover {
  color: var(--c-text);
}
.filters-bar button.active {
  color: var(--c-text);
  border-bottom: 1px solid var(--c-accent);
}

/* Details Section Layout */
.project-details-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(32px, 5vw, 64px);
  margin-top: 48px;
  align-items: flex-start;
}
.project-desc-text {
  margin: 0;
  font-size: var(--fs-body);
  letter-spacing: var(--ls-body);
  flex: 1 1 420px;
}
.project-specs-list {
  margin: 0;
  font-size: var(--fs-small);
  flex: 1 1 260px;
}
.project-spec-item {
  display: flex;
  justify-content: space-between;
  padding: 10px 0;
  border-top: 1px solid var(--c-hair);
}
.project-spec-item:last-child {
  border-bottom: 1px solid var(--c-hair);
}
.project-spec-label {
  color: var(--c-faint);
}
.project-spec-value {
  margin: 0;
  color: var(--c-text);
}
.project-gallery-list {
  display: flex;
  flex-direction: column;
  gap: 40px;
  margin-top: 64px;
}
.project-gallery-list img {
  display: block;
  width: 100%;
  height: auto;
}
.only-cover-note {
  margin: 24px 0 0;
  font-size: var(--fs-small);
  letter-spacing: 0.1em;
  color: var(--c-dim);
}
.project-pager-nav {
  display: flex;
  justify-content: space-between;
  margin-top: 80px;
  padding-top: 32px;
  border-top: 1px solid var(--c-hair);
  font-size: var(--fs-small);
  letter-spacing: 0.1em;
}
.project-pager-nav a {
  color: var(--c-mut);
}
.project-pager-nav a:hover {
  color: var(--c-text);
}

/* About Section */
.about-flex-container {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(40px, 6vw, 72px);
  margin-top: 56px;
  align-items: flex-start;
}
.portrait-box {
  width: min(380px, 100%);
  height: 480px;
  flex: none;
  filter: grayscale(1);
  background: rgba(240, 241, 238, 0.08);
  border: 1px dashed var(--c-hair);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: var(--c-dim);
  font-size: var(--fs-small);
  padding: 24px;
}
.portrait-box svg {
  margin-bottom: 12px;
  stroke: var(--c-faint);
}
.about-bio-col {
  flex: 1 1 420px;
  min-width: 300px;
}
.about-bio-name {
  margin: 0;
  font-size: var(--fs-sub);
  font-weight: var(--fw-regular);
  color: var(--c-text);
  letter-spacing: 0.08em;
}
.about-bio-text {
  margin: 24px 0 0;
  font-size: var(--fs-body);
  letter-spacing: var(--ls-body);
}
.about-bio-text + .about-bio-text {
  margin-top: 16px;
}
.about-timeline-section {
  margin-top: 48px;
}
.about-timeline-title {
  margin: 0 0 8px;
  font-size: var(--fs-small);
  letter-spacing: var(--ls-wide);
  color: var(--c-mut);
}
.about-timeline-row {
  display: flex;
  gap: 24px;
  padding: 12px 0;
  border-top: 1px solid var(--c-hair);
  font-size: var(--fs-body);
}
.about-timeline-row:last-child {
  border-bottom: 1px solid var(--c-hair);
}
.about-timeline-label {
  flex: none;
  width: 120px;
  color: var(--c-faint);
}
.about-timeline-value {
  color: var(--c-text);
}

/* Workflow Section */
.workflow-step-head {
  display: flex;
  align-items: center;
  gap: 14px;
}
.workflow-step-icon {
  flex: none;
}
.workflow-step-title {
  margin: 0;
  font-size: var(--fs-sub);
  font-weight: var(--fw-regular);
  color: var(--c-text);
  letter-spacing: var(--ls-title);
}
.workflow-step-number {
  color: var(--c-faint);
  margin-right: 10px;
}
.workflow-step-desc {
  margin: 14px 0 0;
  font-size: var(--fs-body);
  letter-spacing: var(--ls-body);
}

/* Contact Page Section */
.contact-col-title {
  margin: 0 0 8px;
  font-size: var(--fs-small);
  letter-spacing: var(--ls-wide);
  color: var(--c-mut);
}
.contact-info-row {
  display: flex;
  gap: 24px;
  align-items: center;
  padding: 24px 0;
  border-top: 1px solid var(--c-hair);
  font-size: var(--fs-body);
}
.contact-info-row:last-child {
  border-bottom: 1px solid var(--c-hair);
}
.contact-info-label {
  flex: none;
  width: 96px;
  color: var(--c-faint);
}
.contact-info-value {
  color: var(--c-text);
}
.contact-info-value a {
  color: var(--c-text);
}
.contact-info-value a:hover {
  color: var(--c-accent);
}
.contact-booking-row {
  padding: 14px 0;
  border-top: 1px solid var(--c-hair);
  font-size: var(--fs-body);
  color: var(--c-text);
}
.contact-booking-row:last-child {
  border-bottom: 1px solid var(--c-hair);
}

/* Prototype Note Band */
.proto-note {
  background: #24282B;
  border-bottom: 1px solid var(--c-hair);
}
.proto-note .wrap {
  padding-top: 10px;
  padding-bottom: 10px;
}
.proto-note p {
  font-size: var(--fs-small);
  color: var(--c-text);
  letter-spacing: var(--ls-title);
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--c-hair);
  padding: 80px 0 60px;
}
.site-footer .grid-footer {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--gap-col);
  align-items: start;
}
.site-footer-brand {
  margin: 0;
  color: var(--c-text);
  letter-spacing: var(--ls-wide);
  font-size: var(--fs-small);
}
.site-footer-slogan {
  margin: 10px 0 0;
  font-size: var(--fs-small);
  letter-spacing: var(--ls-title);
  color: var(--c-dim);
}
.site-footer address {
  font-style: normal;
  font-size: var(--fs-small);
  line-height: 2.1;
}
.site-footer address a {
  color: var(--c-text);
}
.site-footer address a:hover {
  color: var(--c-accent);
}
.site-footer-contact-link {
  display: inline-block;
  margin-top: 12px;
  color: var(--c-text);
  border-bottom: 1px solid var(--c-accent);
  padding-bottom: 2px;
}
.site-footer-contact-link:hover {
  color: var(--c-accent);
}
.site-footer-socials {
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: var(--fs-small);
  letter-spacing: 0.1em;
}
.site-footer-socials a {
  color: var(--c-mut);
}
.site-footer-socials a:hover {
  color: var(--c-text);
}
.site-footer-copyright {
  margin: 44px 0 0;
  padding-top: 24px;
  border-top: 1px solid var(--c-hair);
  font-size: var(--fs-small);
  color: var(--c-dim);
  text-align: center;
}

/* Animations on Scroll */
.fade-in-up {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.9s ease, transform 0.9s ease;
}
.fade-in-up.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* RWD / Mobile style adjustments */
@media (max-width: 720px) {
  /* Header navigation mobile collapsing */
  .nav {
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    background: var(--c-bg);
    border-bottom: 1px solid var(--c-hair);
    flex-direction: column;
    gap: 0;
    padding: 8px var(--pad-x) 16px;
    display: none;
  }
  .nav.open { display: flex; }
  .nav a { padding: 12px 0; border-top: none; }
  .nav a.active { border-top: none; border-bottom: 1px solid var(--c-text); }
  .nav-toggle { display: block; }
  
  /* Hero typography for mobile */
  .hero-title-ghost, .hero-title-real {
    font-size: calc(var(--fs-title) * 0 + 13.5vw);
    line-height: 1.05;
  }
  .hero-sub {
    font-size: var(--fs-body);
  }
  
  /* Layout constraints */
  .awards-list { columns: 1; }
  .grid-process { grid-template-columns: 1fr; }
  .grid-contact { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .fade-in-up {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
  * { transition: none !important; animation: none !important; }
}