/* ════════════════════════════════════════════════════
   CSS Custom Properties
════════════════════════════════════════════════════ */
:root {
  --gold:    #F5C000;
  --gold-dk: #C89A00;
  --dark:    #1A1A1A;
  --dark-2:  #242424;
  --dark-3:  #2E2E2E;
  --cream:   #F5EFE0;
  --cream-2: #EDE6D0;
  --red:     #C0392B;
  --blue:    #2980B9;
  --white:   #FFFFFF;
  --ph-bg:   #2A2A2A;
  --ph-border: #F5C000;
  --section-pad: 80px;
  --inner-max: 1100px;
  --radius: 16px;
  --transition: .25s ease;
}

/* ════════════════════════════════════════════════════
   Reset & Base
════════════════════════════════════════════════════ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: system-ui, -apple-system, 'Helvetica Neue', sans-serif;
  background: #C07500;   /* 深琥珀 — 波浪縫隙透出此色，製造上下雙波浪視覺 */
  color: var(--white);
  overflow-x: hidden;
}
@media (max-width: 750px) {
  body { background-size: calc(284 / 750 * 100dvw) auto; }
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img { display: block; max-width: 100%; }

/* ════════════════════════════════════════════════════
   Placeholder System
════════════════════════════════════════════════════ */
.placeholder {
  background: var(--ph-bg);
  border: 2px dashed var(--ph-border);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  width: 100%;
  height: 100%;
  min-height: 80px;
  color: var(--gold);
  font-family: 'Courier New', monospace;
  text-align: center;
  padding: 12px;
}

.placeholder::before {
  content: attr(data-asset);
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: .05em;
}

.placeholder::after {
  content: attr(data-desc) '\A' attr(data-size);
  white-space: pre;
  font-size: .7rem;
  color: rgba(245,192,0,.65);
  line-height: 1.6;
}

/* ════════════════════════════════════════════════════
   Scroll Animations
════════════════════════════════════════════════════ */
.js-anim { opacity: 0; transition: opacity .7s ease, transform .7s ease; }
.js-anim.fade-in  { transform: none; }
.js-anim.slide-up { transform: translateY(30px); }
.js-anim.is-visible { opacity: 1; transform: none !important; }

@media (prefers-reduced-motion: reduce) {
  .js-anim { opacity: 1; transform: none !important; transition: none; }
}

/* ════════════════════════════════════════════════════
   Section Common
════════════════════════════════════════════════════ */
.section {
  padding: var(--section-pad) 20px;
  position: relative; /* wave_bg 必須 */
}

/* section--dark 只套用在非 wave 的深色區塊 */
.section--dark:not(.is-light) { background: var(--dark-2); }

.section-inner {
  max-width: var(--inner-max);
  margin: 0 auto;
  position: relative; /* 浮在 wave_bg 上方 */
  z-index: 1;
}

/* ════════════════════════════════════════════════════
   WAVE BACKGROUND SYSTEM
   Nintendo ゴエモン スタイル 波浪底層架構
   ─────────────────────────────────────────────────
   素材待補清單（補齊後替換對應 url() 路徑）：
     assets/bg_texture.webp        主底色磚（284×284px，四邊無縫接合）
     assets/bg_texture_b.webp      米褐底色磚
     assets/bg_texture_c.webp      米白底色磚
     assets/mask_wave_top.webp     頂部波浪遮罩（橫向無縫接合）
     assets/mask_wave_bottom.webp  底部波浪遮罩（橫向無縫接合）
════════════════════════════════════════════════════ */

/* ── Wave 尺寸 token（基於 1600px 基準，響應式縮放） ── */
:root {
  --wave-h:     calc(59 / 1600 * 100dvw);    /* 波浪高度 */
  --wave-w:     calc(1407 / 1600 * 100dvw);  /* 波浪圖橫向重複單位寬度 */
  --wave-col:   #F5C000;   /* 橘黃底色（主色系，對應主底色磚） */
  --wave-col-b: #FFEEA0;   /* 米褐底色 */
  --wave-col-c: #FFFBEE;   /* 米白底色 */
  --text-on-wave:  #2A1800; /* 淺底上的正文色 */
  --title-on-wave: #1A1A1A; /* 淺底上的標題色 */
}
@media (min-width: 1600px) {
  :root { --wave-h: 59px; --wave-w: 1407px; }
}
@media (max-width: 750px) {
  :root {
    --wave-h: calc(59 / 750 * 100dvw);
    --wave-w: calc(1407 / 750 * 100dvw);
  }
}

/* ── 波浪底層 div（每個 wave section 的第一個子元素） ── */
/*
 * 架構說明（body 背景 #C07500 深琥珀為波浪間隙色）：
 *   mask_wave.png v2 = 中間白、上下黑，白/黑交界即波浪邊界
 *
 *   ::before  佔滿整個 section（inset:0），3 層 mask-composite: add
 *             Layer1: mask_wave.png 頂端對齊（50% 0）→ 頂部波浪
 *             Layer2: 純黑漸層填實中間（wave-h ~ 100%-wave-h）
 *             Layer3: mask_wave.png 底端對齊（50% 100%）→ 底部波浪
 *             三層 union → section 色出現在所有 WHITE 區，BLACK 露出體色 #C07500
 *
 *   ::after   中間貼材質（top:wave-h ~ bottom:wave-h），不需 mask
 *   ※ wave_bg 本身無 mask，避免遮蔽子偽元素
 */
.wave_bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  --_wc: var(--wave-col);
}
.wave_bg.beige { --_wc: var(--wave-col-b); }
.wave_bg.cream { --_wc: var(--wave-col-c); }

.wave_bg::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--_wc);
  -webkit-mask:
    url(assets/mask_wave.png) repeat-x 50% 0   / var(--wave-w) calc(var(--wave-h) * 2),
    linear-gradient(#000 0 0) 50% var(--wave-h) / 100% calc(100% - var(--wave-h) * 2) no-repeat,
    url(assets/mask_wave.png) repeat-x 50% 100% / var(--wave-w) calc(var(--wave-h) * 2);
  -webkit-mask-composite: source-over, source-over;
  mask:
    url(assets/mask_wave.png) repeat-x 50% 0   / var(--wave-w) calc(var(--wave-h) * 2),
    linear-gradient(#000 0 0) 50% var(--wave-h) / 100% calc(100% - var(--wave-h) * 2) no-repeat,
    url(assets/mask_wave.png) repeat-x 50% 100% / var(--wave-w) calc(var(--wave-h) * 2);
  mask-composite: add, add;
}

.wave_bg::after {
  content: '';
  position: absolute;
  top: var(--wave-h); left: 0; right: 0; bottom: var(--wave-h);
  background:
    url(assets/bg_page_orange.webp) repeat 50% 0 / calc(284 / 1600 * 100dvw) auto,
    var(--_wc);
  pointer-events: none;
}
.wave_bg.beige::after { background-image: url(assets/bg_page_beige.webp), none; }
.wave_bg.cream::after  { background-image: url(assets/bg_page_cream.webp), none; }
.wave_bg.contents::after {
  background: url(assets/bg_contents.webp) repeat-x 50% 0 / auto 100%, var(--_wc);
}
@media (min-width: 1600px) { .wave_bg::after { background-size: 284px auto, auto; } }
@media (max-width: 750px)  { .wave_bg::after { background-size: calc(284 / 750 * 100dvw) auto, auto; } }

/* ── 淺底區段：文字色覆寫（is-light class） ── */
.section.is-light { background: transparent; }

.section.is-light .section-title  { color: var(--title-on-wave); }

/* News */
.section.is-light .news-loading   { color: rgba(0,0,0,.4); }
.section.is-light .news-row       { color: var(--text-on-wave); border-bottom-color: rgba(0,0,0,.1); }
.section.is-light .news-date      { color: rgba(0,0,0,.4); }
.section.is-light .news-headline  { color: var(--text-on-wave); }
.section.is-light .news-arrow     { color: rgba(0,0,0,.25); }
.section.is-light .news-row:hover { color: #7A4E00; }
.section.is-light .news-row:hover .news-arrow { transform: translateX(4px); color: #7A4E00; }

/* Features */
.section.is-light .feature-card  { background: rgba(255,255,255,.65); }
.section.is-light .feature-desc  { color: rgba(0,0,0,.6); }

/* Guest Guide */
.section.is-light .step-label    { color: var(--text-on-wave); }
.section.is-light .step-arrow    { color: #7A4E00; }
.section.is-light .demo-wrap     { background: rgba(255,255,255,.55); border-color: rgba(0,0,0,.1); }
.section.is-light .demo-title    { color: #7A4E00; }
.section.is-light .demo-mode-btn { background: rgba(255,255,255,.7); border-color: rgba(0,0,0,.15); color: var(--text-on-wave); }
.section.is-light .demo-mode-btn.active { background: var(--gold); border-color: var(--gold); color: var(--dark); }
.section.is-light .demo-step-desc { color: rgba(0,0,0,.5); }
.section.is-light .demo-ctrl-btn  { background: rgba(0,0,0,.06); border-color: rgba(0,0,0,.12); color: var(--text-on-wave); }
.section.is-light .demo-step-ind  { color: rgba(0,0,0,.35); }

/* User Guide */
.section.is-light .identity-tab        { background: rgba(255,255,255,.6); border-color: rgba(0,0,0,.12); color: var(--text-on-wave); }
.section.is-light .identity-tab:hover  { color: #7A4E00; border-color: #7A4E00; }
.section.is-light .identity-tab.active { background: var(--gold); border-color: var(--gold); color: var(--dark); font-weight: 700; }
.section.is-light .identity-info h3    { color: #7A4E00; }
.section.is-light .identity-desc       { color: rgba(0,0,0,.62); }
.section.is-light .identity-features li { background: rgba(255,255,255,.55); border-left-color: #7A4E00; color: var(--text-on-wave); }
.section.is-light .phone-frame-sm      { border-color: rgba(0,0,0,.1); background: rgba(255,255,255,.3); }

/* FAQ */
.section.is-light .faq-group-title { color: #7A4E00; border-bottom-color: rgba(122,78,0,.25); }
.section.is-light .faq-q           { color: var(--text-on-wave); }
.section.is-light .faq-item        { border-bottom-color: rgba(0,0,0,.1); }
.section.is-light .faq-icon        { color: #7A4E00; }
.section.is-light .faq-a           { color: rgba(0,0,0,.58); }

/* App Info */
.section.is-light .appinfo-card    { background: rgba(255,255,255,.65); border-color: rgba(0,0,0,.08); }
.section.is-light .appinfo-name    { color: var(--text-on-wave); }
.section.is-light .appinfo-dev     { color: rgba(0,0,0,.4); }
.section.is-light .appinfo-label   { color: rgba(0,0,0,.35); }
.section.is-light .appinfo-value   { color: var(--text-on-wave); }
.section.is-light .appinfo-row     { border-bottom-color: rgba(0,0,0,.06); }
.section.is-light .appinfo-links a { color: #7A4E00; }

/* Download */
.section.is-light .download-note  { color: rgba(0,0,0,.45); }

/* ════════════════════════════════════════════════════ */

.section-title {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 700;
  color: var(--gold);
  text-align: center;
  margin-bottom: 48px;
  letter-spacing: .05em;
}

/* ════════════════════════════════════════════════════
   Image replacements（佔位轉實際圖片後的樣式）
════════════════════════════════════════════════════ */
.hero-char-img  { width: 100%; height: auto; display: block; }
.hero-logo-img  { width: 100%; max-width: 480px; height: auto; display: block; }
.step-img       { width: 100%; aspect-ratio: 16/10; object-fit: cover; border-radius: 10px; }
.identity-img   { width: 100%; aspect-ratio: 2/1; object-fit: cover; border-radius: var(--radius); }
.dl-btn-img     { width: 280px; height: auto; display: block; }
.float-btn-img  { width: 160px; height: auto; display: block; }

/* feature-card img */
.feature-img-wrap img {
  width: 100%;
  aspect-ratio: 16/10;
  object-fit: cover;
  display: block;
}

/* phone-frame img */
.phone-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* ════════════════════════════════════════════════════
   HERO
════════════════════════════════════════════════════ */
#hero {
  position: relative;
  background: var(--dark);
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* background gold radial glow top-right */
#hero::before {
  content: '';
  position: absolute;
  top: -200px; right: -200px;
  width: 700px; height: 700px;
  background: radial-gradient(circle, rgba(245,192,0,.15) 0%, transparent 70%);
  pointer-events: none;
}

.hero-brand-mark {
  position: absolute;
  top: 24px; left: 28px;
  z-index: 2;
  width: 160px;
  height: 40px;
}

.hero-brand-mark .placeholder { min-height: 40px; font-size: .6rem; }

.hero-inner {
  flex: 1;
  display: flex;
  align-items: flex-end;
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
  padding: 40px 40px 40px;
  gap: 40px;
}

/* Character - left 45% */
.hero-character-wrap {
  flex: 0 0 45%;
  max-width: 45%;
  align-self: flex-end;
}

.hero-char-ph { min-height: 500px; aspect-ratio: 4/5; }

/* Copy - right 55% */
.hero-copy {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 20px;
  padding-bottom: 40px;
}

.hero-logo-ph { height: 120px; min-height: 120px; }

.hero-tagline {
  font-size: clamp(1rem, 2vw, 1.3rem);
  color: rgba(255,255,255,.8);
  letter-spacing: .05em;
}

.btn-download-hero {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--gold);
  color: var(--dark);
  font-weight: 700;
  font-size: 1rem;
  padding: 14px 28px;
  border-radius: 50px;
  align-self: flex-start;
  transition: background var(--transition), transform var(--transition);
}

.btn-download-hero:hover {
  background: var(--gold-dk);
  transform: translateY(-2px);
}

/* Phone mockups */
.hero-mockups {
  display: flex;
  gap: 12px;
  align-items: flex-end;
}

.phone-frame {
  flex: 1;
  background: var(--dark-3);
  border: 2px solid rgba(255,255,255,.1);
  border-radius: 24px;
  overflow: hidden;
  aspect-ratio: 9/19;
  transform: rotate(2deg);
  transition: transform var(--transition);
}

.phone-frame--center {
  transform: translateY(-16px) rotate(0deg);
  border-color: var(--gold);
  flex: 1.15;
}

.phone-frame:hover { transform: rotate(0deg) translateY(-4px); }
.phone-frame--center:hover { transform: translateY(-20px); }

.mock-ph { height: 100%; min-height: 200px; font-size: .6rem; }

/* Particles */
#particle-canvas {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.particle {
  position: absolute;
  font-size: var(--p-size, 16px);
  color: var(--gold);
  opacity: 0;
  animation: particleFall var(--p-dur, 8s) var(--p-delay, 0s) linear infinite;
  user-select: none;
}

@keyframes particleFall {
  0%   { transform: translateY(-20px) rotate(0deg); opacity: .8; }
  100% { transform: translateY(110vh) rotate(360deg); opacity: 0; }
}

/* ════════════════════════════════════════════════════
   NAV
════════════════════════════════════════════════════ */
#main-nav {
  background: var(--dark-2);
  border-top: 1px solid rgba(245,192,0,.2);
  border-bottom: 1px solid rgba(245,192,0,.2);
  position: sticky;
  top: 0;
  z-index: 100;
  transition: box-shadow var(--transition);
}

#main-nav.is-fixed {
  box-shadow: 0 4px 24px rgba(0,0,0,.5);
}

.nav-inner {
  max-width: var(--inner-max);
  margin: 0 auto;
  padding: 0 20px;
  height: 56px;
  display: flex;
  align-items: center;
  gap: 20px;
}

.nav-logo { flex-shrink: 0; }
.nav-logo-ph  { min-height: 30px; height: 30px; width: 120px; font-size: .55rem; }
.nav-logo-img { height: 40px; width: auto; display: block; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
}

.nav-links a {
  padding: 6px 12px;
  font-size: .9rem;
  color: rgba(255,255,255,.8);
  border-radius: 8px;
  transition: color var(--transition), background var(--transition);
  white-space: nowrap;
}

.nav-links a:hover { color: var(--gold); }

.nav-links .nav-cta {
  background: var(--gold);
  color: var(--dark);
  font-weight: 700;
  padding: 6px 16px;
}

.nav-links .nav-cta:hover { background: var(--gold-dk); color: var(--dark); }

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
  margin-left: auto;
}

.hamburger span {
  display: block;
  width: 24px; height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

.hamburger.open span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* Mobile menu */
.nav-mobile-menu {
  display: none;
  flex-direction: column;
  background: var(--dark-3);
  border-top: 1px solid rgba(255,255,255,.08);
  padding: 8px 0;
}

.nav-mobile-menu.open { display: flex; }

.nav-mobile-menu a {
  padding: 14px 24px;
  font-size: 1rem;
  color: rgba(255,255,255,.85);
  border-bottom: 1px solid rgba(255,255,255,.05);
  transition: color var(--transition), background var(--transition);
}

.nav-mobile-menu a:hover { color: var(--gold); background: rgba(245,192,0,.05); }

.nav-mobile-menu .nav-cta-mobile {
  color: var(--gold);
  font-weight: 700;
}

/* ════════════════════════════════════════════════════
   NEWS
════════════════════════════════════════════════════ */
/* #news 背景由 .wave_bg 接管 */

.news-loading {
  text-align: center;
  color: rgba(255,255,255,.4);
  padding: 40px;
  font-size: .9rem;
}

.news-list { max-width: 720px; margin: 0 auto; }

.news-row {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid rgba(255,255,255,.08);
  cursor: pointer;
  transition: color var(--transition);
}

.news-row:hover { color: var(--gold); }

.news-date {
  flex-shrink: 0;
  font-size: .85rem;
  color: rgba(255,255,255,.45);
  font-family: 'Courier New', monospace;
}

.news-headline {
  font-size: .95rem;
  flex: 1;
}

.news-arrow {
  flex-shrink: 0;
  color: rgba(255,255,255,.3);
  font-size: .8rem;
  transition: transform var(--transition);
}

.news-row:hover .news-arrow { transform: translateX(4px); color: var(--gold); }

/* ════════════════════════════════════════════════════
   FEATURES
════════════════════════════════════════════════════ */
.features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.feature-card {
  background: var(--dark-3);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform var(--transition);
}

.feature-card:hover { transform: translateY(-4px); }

.feature-img-wrap {
  position: relative;
  aspect-ratio: 16/10;
  overflow: hidden;
}

.feat-ph { aspect-ratio: 16/10; min-height: 180px; }

.feature-title-bar {
  position: absolute;
  top: 0; left: 0; right: 0;
  background: rgba(245,192,0,.9);
  color: var(--dark);
  font-weight: 700;
  font-size: .95rem;
  padding: 8px 14px;
  backdrop-filter: blur(4px);
}

.feature-desc {
  padding: 14px 16px;
  font-size: .88rem;
  color: rgba(255,255,255,.7);
  line-height: 1.5;
}

/* ════════════════════════════════════════════════════
   GUEST GUIDE - Steps
════════════════════════════════════════════════════ */
/* #guest-guide 背景由 .wave_bg 接管 */

.steps-row {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 64px;
}

.step-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.step-badge {
  background: var(--gold);
  color: var(--dark);
  font-weight: 700;
  font-size: .8rem;
  padding: 4px 12px;
  border-radius: 50px;
  letter-spacing: .08em;
}

.step-ph { aspect-ratio: 16/10; min-height: 160px; border-radius: 10px; overflow: hidden; }

.step-label {
  font-weight: 600;
  font-size: .95rem;
  color: rgba(255,255,255,.85);
}

.step-arrow {
  font-size: 1.8rem;
  color: var(--gold);
  flex-shrink: 0;
  margin-top: -20px;
}

/* ════════════════════════════════════════════════════
   DEMO
════════════════════════════════════════════════════ */
.demo-wrap {
  background: var(--dark-3);
  border: 1px solid rgba(245,192,0,.2);
  border-radius: var(--radius);
  padding: 36px;
}

.demo-title {
  text-align: center;
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--gold);
  margin-bottom: 24px;
  letter-spacing: .05em;
}

.demo-modes {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.demo-mode-btn {
  background: var(--dark-2);
  border: 1.5px solid rgba(255,255,255,.15);
  color: rgba(255,255,255,.7);
  font-size: .88rem;
  padding: 8px 18px;
  border-radius: 50px;
  cursor: pointer;
  transition: all var(--transition);
}

.demo-mode-btn:hover { border-color: var(--gold); color: var(--gold); }
.demo-mode-btn.active {
  background: var(--gold);
  border-color: var(--gold);
  color: var(--dark);
  font-weight: 700;
}

.demo-step-desc {
  text-align: center;
  font-size: .92rem;
  color: rgba(255,255,255,.6);
  margin-bottom: 28px;
  min-height: 1.4em;
}

.demo-panels {
  display: flex;
  gap: 24px;
  justify-content: center;
  margin-bottom: 24px;
}

.demo-panel {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
}

.demo-panel-label {
  font-size: .8rem;
  color: rgba(255,255,255,.45);
  letter-spacing: .08em;
  text-transform: uppercase;
}

.demo-phone-wrap {
  width: 220px;
}

.demo-phone-frame {
  background: var(--dark);
  border: 3px solid rgba(255,255,255,.15);
  border-radius: 32px;
  padding: 8px;
  box-shadow: 0 8px 32px rgba(0,0,0,.5);
  position: relative;
}

/* notch */
.demo-phone-frame::before {
  content: '';
  display: block;
  width: 60px; height: 6px;
  background: rgba(255,255,255,.1);
  border-radius: 3px;
  margin: 0 auto 8px;
}

.demo-phone-frame--web {
  border-color: rgba(245,192,0,.3);
}

.demo-phone-screen {
  width: 100%;
  min-height: 380px;
  border-radius: 24px;
  overflow: hidden;
  background: var(--dark-2);
  font-size: .78rem;
}

/* Demo App Screens */
.d-appbar {
  background: var(--dark);
  padding: 10px 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--white);
  font-weight: 700;
  font-size: .8rem;
}

.d-appbar-btn {
  background: var(--gold);
  color: var(--dark);
  font-size: .65rem;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 10px;
}

.d-body {
  background: var(--gold);
  padding: 10px;
  min-height: 320px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.d-card {
  background: var(--cream);
  border-radius: 12px;
  padding: 10px 12px;
  color: var(--dark);
}

.d-card-title {
  font-weight: 700;
  font-size: .75rem;
  margin-bottom: 6px;
  color: var(--dark);
}

.d-qr-box {
  background: var(--gold);
  border-radius: 10px;
  padding: 10px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}

.d-qr-code {
  width: 70px; height: 70px;
  background:
    repeating-linear-gradient(0deg, #000 0, #000 6px, transparent 6px, transparent 12px),
    repeating-linear-gradient(90deg, #000 0, #000 6px, transparent 6px, transparent 12px);
  background-color: #fff;
  border-radius: 4px;
}

.d-qr-label {
  font-size: .7rem;
  font-weight: 700;
  color: var(--dark);
}

.d-toggle-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 0;
  border-bottom: 1px solid rgba(0,0,0,.08);
  gap: 8px;
}

.d-toggle-label { font-size: .7rem; color: var(--dark); flex: 1; }

.d-toggle {
  width: 34px; height: 18px;
  border-radius: 9px;
  background: #ccc;
  flex-shrink: 0;
  position: relative;
  transition: background .2s;
}

.d-toggle.on { background: var(--blue); }

.d-toggle::after {
  content: '';
  position: absolute;
  width: 14px; height: 14px;
  border-radius: 50%;
  background: white;
  top: 2px; left: 2px;
  transition: transform .2s;
  box-shadow: 0 1px 3px rgba(0,0,0,.3);
}

.d-toggle.on::after { transform: translateX(16px); }

.d-notif-overlay {
  position: absolute;
  top: 10px; left: 8px; right: 8px;
  background: rgba(30,30,30,.96);
  border-left: 3px solid var(--gold);
  border-radius: 10px;
  padding: 10px 12px;
  z-index: 10;
  box-shadow: 0 4px 16px rgba(0,0,0,.6);
}

.d-notif-title { font-size: .7rem; font-weight: 700; color: var(--gold); margin-bottom: 2px; }
.d-notif-body  { font-size: .65rem; color: rgba(255,255,255,.8); }

.d-log-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 5px 0;
  border-bottom: 1px solid rgba(0,0,0,.08);
  font-size: .65rem;
  color: var(--dark);
}

.d-log-icon { font-size: .8rem; }
.d-log-time { font-size: .6rem; color: rgba(0,0,0,.4); margin-left: auto; }
.d-log-prize { color: var(--red); font-weight: 700; }

.d-claw-setting {
  background: var(--cream-2);
  border-radius: 8px;
  padding: 8px 10px;
  font-size: .7rem;
  color: var(--dark);
  display: flex;
  align-items: center;
  gap: 6px;
}

.d-claw-val {
  background: var(--gold);
  color: var(--dark);
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 6px;
}

/* Demo Web Screens */
.w-body {
  background: var(--gold);
  min-height: 380px;
  display: flex;
  flex-direction: column;
}

.w-topbar {
  background: var(--dark);
  padding: 6px 10px;
  font-size: .65rem;
  color: rgba(255,255,255,.5);
  text-align: center;
}

.w-scan-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 14px;
  padding: 20px;
  background: var(--dark);
}

.w-scan-qr {
  width: 90px; height: 90px;
  border: 3px solid var(--gold);
  border-radius: 8px;
  background:
    repeating-linear-gradient(0deg, rgba(245,192,0,.3) 0, rgba(245,192,0,.3) 4px, transparent 4px, transparent 8px),
    repeating-linear-gradient(90deg, rgba(245,192,0,.3) 0, rgba(245,192,0,.3) 4px, transparent 4px, transparent 8px);
  animation: scanPulse 1.5s ease-in-out infinite;
}

@keyframes scanPulse {
  0%, 100% { border-color: var(--gold); box-shadow: 0 0 0 rgba(245,192,0,0); }
  50% { border-color: var(--gold); box-shadow: 0 0 16px rgba(245,192,0,.4); }
}

.w-scan-label { font-size: .75rem; color: rgba(255,255,255,.7); text-align: center; }

.w-rate-header {
  background: var(--dark);
  padding: 8px 10px;
  font-size: .7rem;
  color: rgba(255,255,255,.6);
  display: flex;
  gap: 8px;
}

.w-rate-tag {
  background: var(--gold);
  color: var(--dark);
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 10px;
  font-size: .65rem;
}

.w-rate-stats {
  background: var(--dark);
  padding: 6px 10px;
  display: flex;
  justify-content: space-between;
  font-size: .65rem;
  color: rgba(255,255,255,.6);
  border-bottom: 1px solid rgba(255,255,255,.1);
}

.w-start-btn {
  margin: 16px auto;
  background: var(--gold);
  color: var(--dark);
  font-weight: 700;
  font-size: .85rem;
  padding: 10px 24px;
  border-radius: 50px;
  border: none;
  cursor: pointer;
  display: block;
}

/* Demo scratch card */
.w-scratch-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 4px;
  padding: 8px;
  background: var(--gold);
  flex: 1;
}

.w-slot {
  aspect-ratio: 1;
  background: var(--dark);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  cursor: pointer;
  transition: background var(--transition), transform .15s;
  color: transparent;
  font-weight: 700;
  border: none;
}

.w-slot:hover { transform: scale(.96); }
.w-slot.scratched-no  { background: #555; color: rgba(255,255,255,.6); font-size: .9rem; }
.w-slot.scratched-yes { background: var(--red); color: var(--white); font-size: .85rem; }

.w-scratch-done {
  text-align: center;
  padding: 10px;
  background: var(--dark);
  color: var(--gold);
  font-weight: 700;
  font-size: .8rem;
}

/* Demo password/claw screens */
.w-input-screen {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 20px;
  background: var(--cream);
}

.w-input-title { font-weight: 700; font-size: .85rem; color: var(--dark); text-align: center; }
.w-input-sub   { font-size: .7rem; color: rgba(0,0,0,.5); text-align: center; }

.w-input-field {
  width: 100%;
  padding: 8px 12px;
  border: 2px solid var(--dark);
  border-radius: 8px;
  font-size: .85rem;
  text-align: center;
  background: var(--white);
  color: var(--dark);
}

.w-input-btn {
  background: var(--dark);
  color: var(--white);
  font-weight: 700;
  font-size: .85rem;
  padding: 8px 24px;
  border-radius: 50px;
  border: none;
  cursor: pointer;
  width: 100%;
  transition: background var(--transition);
}

.w-input-btn:hover { background: #333; }

/* Demo controls */
.demo-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  margin-top: 8px;
}

.demo-ctrl-btn {
  background: rgba(255,255,255,.08);
  border: 1.5px solid rgba(255,255,255,.15);
  color: rgba(255,255,255,.8);
  font-size: .88rem;
  padding: 8px 20px;
  border-radius: 50px;
  cursor: pointer;
  transition: all var(--transition);
}

.demo-ctrl-btn:hover:not(:disabled) {
  background: var(--gold);
  border-color: var(--gold);
  color: var(--dark);
  font-weight: 700;
}

.demo-ctrl-btn:disabled {
  opacity: .3;
  cursor: not-allowed;
}

.demo-step-ind {
  font-size: .85rem;
  color: rgba(255,255,255,.4);
  font-family: 'Courier New', monospace;
  min-width: 40px;
  text-align: center;
}

/* ════════════════════════════════════════════════════
   USER GUIDE - Identity Tabs
════════════════════════════════════════════════════ */
/* #user-guide 背景由 .wave_bg.cream 接管 */

.identity-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 32px;
  overflow-x: auto;
  padding-bottom: 4px;
  scrollbar-width: none;
}

.identity-tabs::-webkit-scrollbar { display: none; }

.identity-tab {
  flex-shrink: 0;
  background: rgba(255,255,255,.06);
  border: 1.5px solid rgba(255,255,255,.12);
  color: rgba(255,255,255,.65);
  font-size: .88rem;
  padding: 10px 20px;
  border-radius: 50px;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}

.identity-tab:hover { color: var(--gold); border-color: var(--gold); }
.identity-tab.active {
  background: var(--gold);
  border-color: var(--gold);
  color: var(--dark);
  font-weight: 700;
}

.identity-content { display: none; }
.identity-content.active { display: block; }

.identity-inner {
  display: flex;
  gap: 40px;
  align-items: flex-start;
}

.identity-img-wrap { flex: 0 0 42%; }
.identity-ph { aspect-ratio: 2/1; min-height: 200px; border-radius: var(--radius); }

.identity-info {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.identity-info h3 {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--gold);
}

.identity-desc {
  font-size: .95rem;
  color: rgba(255,255,255,.7);
  line-height: 1.6;
}

.identity-features {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.identity-features li {
  font-size: .9rem;
  color: rgba(255,255,255,.85);
  padding: 8px 12px;
  background: rgba(255,255,255,.05);
  border-radius: 8px;
  border-left: 3px solid var(--gold);
}

.identity-shots {
  display: flex;
  gap: 10px;
}

.phone-frame-sm {
  flex: 1;
  background: var(--dark-3);
  border: 2px solid rgba(255,255,255,.1);
  border-radius: 16px;
  overflow: hidden;
  aspect-ratio: 9/19;
}

.shot-ph { height: 100%; min-height: 100px; font-size: .6rem; }

/* ════════════════════════════════════════════════════
   FAQ
════════════════════════════════════════════════════ */
/* #faq 背景由 .wave_bg.beige 接管 */

.faq-group {
  max-width: 760px;
  margin: 0 auto 48px;
}

.faq-group-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--gold);
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 2px solid rgba(245,192,0,.3);
}

.faq-item { border-bottom: 1px solid rgba(255,255,255,.08); }

.faq-q {
  width: 100%;
  background: none;
  border: none;
  color: var(--white);
  font-size: .95rem;
  text-align: left;
  padding: 16px 0;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  transition: color var(--transition);
}

.faq-q:hover { color: var(--gold); }

.faq-icon {
  flex-shrink: 0;
  font-size: 1.2rem;
  color: var(--gold);
  transition: transform var(--transition);
  line-height: 1;
}

.faq-item.open .faq-icon { transform: rotate(45deg); }

.faq-a {
  display: none;
  padding: 0 0 16px;
  font-size: .9rem;
  color: rgba(255,255,255,.6);
  line-height: 1.7;
}

.faq-item.open .faq-a { display: block; }

/* ════════════════════════════════════════════════════
   APP INFO
════════════════════════════════════════════════════ */
/* #app-info 背景由 .wave_bg 接管 */

.appinfo-card {
  max-width: 600px;
  margin: 0 auto;
  background: var(--dark-3);
  border: 1px solid rgba(255,255,255,.08);
  border-radius: var(--radius);
  overflow: hidden;
}

.appinfo-header {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 24px;
  border-bottom: 1px solid rgba(255,255,255,.06);
}

.appinfo-icon-wrap {
  width: 72px; height: 72px;
  border-radius: 16px;
  overflow: hidden;
  flex-shrink: 0;
}

.appinfo-icon-ph { min-height: 72px; height: 72px; font-size: .55rem; }

.appinfo-name {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.appinfo-dev {
  font-size: .85rem;
  color: rgba(255,255,255,.45);
}

.appinfo-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  padding: 8px 24px;
}

.appinfo-row {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 12px 0;
  border-bottom: 1px solid rgba(255,255,255,.05);
}

.appinfo-label {
  font-size: .72rem;
  color: rgba(255,255,255,.35);
  text-transform: uppercase;
  letter-spacing: .06em;
}

.appinfo-value {
  font-size: .9rem;
  color: rgba(255,255,255,.85);
  font-weight: 500;
}

.appinfo-links {
  display: flex;
  gap: 16px;
  padding: 20px 24px;
}

.appinfo-links a {
  font-size: .85rem;
  color: var(--gold);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ════════════════════════════════════════════════════
   DOWNLOAD
════════════════════════════════════════════════════ */
/* #download 背景由 .wave_bg.cream 接管 */
#download { text-align: center; }

.download-btns {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.download-link {
  display: block;
  border-radius: 14px;
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition);
}

.download-link:hover { transform: translateY(-3px); box-shadow: 0 8px 24px rgba(245,192,0,.25); }
.download-link--disabled { cursor: not-allowed; opacity: .5; }
.download-link--disabled:hover { transform: none; box-shadow: none; }

.dl-btn-ph { width: 280px; height: 84px; min-height: 84px; font-size: .7rem; }

.download-note {
  font-size: .85rem;
  color: rgba(255,255,255,.4);
  margin-top: 8px;
}

/* ════════════════════════════════════════════════════
   FOOTER
════════════════════════════════════════════════════ */
#footer {
  background: var(--dark-3);
  border-top: 1px solid rgba(255,255,255,.06);
  padding: 40px 20px 20px;
}

.footer-inner {
  max-width: var(--inner-max);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 24px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.footer-left { display: flex; flex-direction: column; gap: 8px; }
.footer-logo-ph  { width: 120px; height: 30px; min-height: 30px; font-size: .55rem; }
.footer-logo-img { height: 40px; width: auto; display: block; }
.footer-appname { font-size: .8rem; color: rgba(255,255,255,.35); }

.footer-right {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 12px;
}

.footer-line-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: #06C755;
  color: var(--white);
  font-weight: 700;
  font-size: .85rem;
  padding: 6px 16px;
  border-radius: 50px;
  transition: opacity var(--transition);
}

.footer-line-btn:hover { opacity: .85; }

.footer-links {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.footer-links a {
  font-size: .82rem;
  color: rgba(255,255,255,.45);
  transition: color var(--transition);
}

.footer-links a:hover { color: var(--gold); }

.footer-copy {
  text-align: center;
  font-size: .75rem;
  color: rgba(255,255,255,.25);
  padding-top: 16px;
  border-top: 1px solid rgba(255,255,255,.05);
  max-width: var(--inner-max);
  margin: 0 auto;
}

/* ════════════════════════════════════════════════════
   FLOATING BUTTON
════════════════════════════════════════════════════ */
#float-btn {
  position: fixed;
  bottom: 24px; right: 24px;
  z-index: 200;
  border-radius: 14px;
  overflow: hidden;
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
  transition: opacity var(--transition), transform var(--transition);
}

#float-btn.visible {
  opacity: 1;
  pointer-events: auto;
  transform: none;
}

.float-btn-ph { width: 160px; height: 48px; min-height: 48px; font-size: .6rem; }

/* ════════════════════════════════════════════════════
   MODAL
════════════════════════════════════════════════════ */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.75);
  backdrop-filter: blur(4px);
  z-index: 300;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.modal-overlay[hidden] { display: none; }

.modal-box {
  background: var(--dark-2);
  border: 1px solid rgba(255,255,255,.1);
  border-radius: var(--radius);
  width: 100%;
  max-width: 560px;
  max-height: 70vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0,0,0,.6);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid rgba(255,255,255,.08);
  flex-shrink: 0;
}

.modal-title {
  font-weight: 700;
  font-size: .95rem;
  color: var(--gold);
  line-height: 1.4;
}

.modal-close {
  background: rgba(255,255,255,.08);
  border: none;
  color: rgba(255,255,255,.6);
  font-size: 1rem;
  width: 32px; height: 32px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background var(--transition), color var(--transition);
}

.modal-close:hover { background: rgba(255,255,255,.15); color: var(--white); }

.modal-body {
  padding: 20px;
  overflow-y: auto;
  font-size: .9rem;
  color: rgba(255,255,255,.75);
  line-height: 1.7;
  white-space: pre-wrap;
}

/* ════════════════════════════════════════════════════
   RESPONSIVE — 960px breakpoint
════════════════════════════════════════════════════ */
@media (max-width: 960px) {

  :root { --section-pad: 56px; }

  /* Hero */
  .hero-inner {
    flex-direction: column;
    align-items: center;
    padding: 80px 24px 32px;
    text-align: center;
  }

  .hero-character-wrap {
    flex: none;
    max-width: 70%;
    order: 2;
  }

  .hero-char-ph { min-height: 280px; }

  .hero-copy {
    flex: none;
    width: 100%;
    order: 1;
    align-items: center;
    padding-bottom: 0;
  }

  .hero-logo-ph { height: 80px; min-height: 80px; }

  .btn-download-hero { align-self: center; }

  .hero-mockups { order: 3; }
  .phone-frame { display: none; }
  .phone-frame--center { display: block; flex: none; width: 160px; transform: none; }

  /* Nav */
  .nav-links { display: none; }
  .hamburger { display: flex; }

  /* Features */
  .features-grid { grid-template-columns: 1fr; gap: 20px; }

  /* Steps */
  .steps-row {
    flex-direction: column;
    gap: 20px;
  }

  .step-arrow { transform: rotate(90deg); margin: 0; }

  /* Demo */
  .demo-wrap { padding: 20px 16px; }
  .demo-panels { flex-direction: column; align-items: center; }
  .demo-phone-wrap { width: 200px; }

  /* Identity */
  .identity-inner { flex-direction: column; }
  .identity-img-wrap { flex: none; width: 100%; }
  .identity-ph { min-height: 160px; }
  .identity-shots { justify-content: center; }
  .phone-frame-sm { max-width: 100px; }

  /* Footer */
  .footer-inner { flex-direction: column; align-items: flex-start; }
  .footer-right { align-items: flex-start; }
  .footer-links { justify-content: flex-start; }

  /* Float btn */
  #float-btn { bottom: 16px; right: 16px; }
}

@media (max-width: 480px) {
  .demo-modes { flex-direction: column; align-items: stretch; }
  .download-btns { flex-direction: column; align-items: center; }
  .dl-btn-ph { width: 100%; max-width: 280px; }
  .appinfo-grid { grid-template-columns: 1fr; }
}