/*
* LittleLink
* https://littlelink.io
* Free to use under the MIT license
* http://www.opensource.org/licenses/mit-license.php
*/

/* Base Typography Settings
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:root {
	font-size:16px;
}

/* Grid
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  .container {
	position:relative;
	width:100%;
	max-width:60rem;    				/* 960px */
    text-align:center;
	margin:0 auto;
	padding:3rem 1.25rem 0 1.25rem;
	box-sizing:border-box;
	z-index: 3;
	pointer-events: none;
}
.container-left {
	position:relative;
	width:100%;
	max-width:37.5rem;
	text-align:left;
	margin:0 auto;
	padding:0 1.25rem;
	box-sizing:border-box;
}
.container-left p {
	margin-bottom: 1rem;  				/* 16px space between paragraphs */
  }
.column {
	position:center;
	width:100%;
	float:center;
	box-sizing:border-box;
}
/* For devices larger than 400px */
  @media (min-width:25rem) {            /* 400px */
    .container {
	width:85%;
	padding-left:0;
	padding-right:0;
}
}/* For devices larger than 550px */
  @media (min-width:34.375rem) {        /* 550px */
    .container {
	width:80%;
}
.column,.columns {
	margin-left:0;
}
.column:first-child,.columns:first-child {
	margin-left:0;
}
}

/* Base Styles
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  body {
	margin:0;
	padding:0;
	background-color:transparent;
	color:#ffffff;
	font-family: "LXGW WenKai", "Open Sans", system-ui, sans-serif;
	font-size:1.125rem;    				/* 18px */
    font-weight:400;
	line-height:1.6;
	overflow-x: hidden;
}

/* 2.5D Living Anime Sky Canvas */
.sky-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: 0;
    pointer-events: none;
    overflow: hidden;
}

#sky-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: block;
    pointer-events: none;
}

/* Airplane Animation */
.airplane-wrapper {
    position: fixed;
    top: 25%; 
    left: 0;
    width: 96px;
    z-index: 2;
    animation: flyAirplane 35s linear infinite;
    pointer-events: none;
    will-change: transform;
}

.airplane {
    width: 100%;
    display: block;
    pointer-events: auto;
    opacity: 0.9;
    cursor: pointer;
    user-select: none;
    -webkit-user-drag: none;
    z-index: 2;
    position: relative;
}

@keyframes flyAirplane {
    0% {
        transform: translate(-150px, 0px) rotate(2deg);
    }
    50% {
        transform: translate(calc(50vw - 150px), -20px) rotate(0deg);
    }
    100% {
        transform: translate(calc(100vw + 150px), 10px) rotate(1deg);
    }
}

/* Typography
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  h1 {
	margin:0 0 0.5rem 0;
	font-size:3rem;         		/* 48px */
    font-weight:800;
	line-height:1;
	letter-spacing:0;
	word-wrap:break-word;
	overflow-wrap:break-word;
	hyphens:auto;           		/* Delete this to remove automatic hyphen on line break */
}
.container p {
	margin:0 0 2rem 0;
}

/* Base Typography Settings
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/* Base size - 16px browser default */
:root {
  font-size:16px;           /* Using a 1.25 modular scale for typography */
  --scale-0:1rem;           /* 16px */
  --scale-1:1.25rem;        /* 20px */
  --scale-2:1.563rem;       /* 25px */
  --scale-3:1.953rem;       /* 31px */
  --scale-4:2.441rem;       /* 39px */
  --scale-5:3.052rem;       /* 49px */

  /* Spacing units */
  --spacing-xs:0.5rem;      /* 8px */
  --spacing-s:1rem;         /* 16px */
  --spacing-m:1.5rem;       /* 24px */
  --spacing-l:2rem;         /* 32px */
  --spacing-xl:3rem;        /* 48px */
  --spacing-xxl:4rem;       /* 64px */
}

/* Avatar */
.avatar {
	width: 8rem;             /* 128px */
	height: 8rem;
	border-radius: 50%;
	object-fit: cover;
	background-position: center;
	margin-bottom: var(--spacing-l);
	margin-left: auto;
	margin-right: auto;
	display: block;
  }

/* Typography Scale */
h1 {
	margin:0 0 var(--spacing-m) 0;
	font-size:var(--scale-5);           /* ~49px */
  	font-weight:800;
	line-height:1.1;
	letter-spacing:-0.02em;
	word-wrap:break-word;
	overflow-wrap:break-word;
	pointer-events: auto;
}
h1 a,
h1 a:not(.button),
:root.theme-dark h1 a,
:root.theme-dark h1 a:not(.button),
:root.theme-auto h1 a,
:root.theme-auto h1 a:not(.button) {
	color: #ffffff;
	text-decoration: none;
	transition: color 0.2s ease;
	text-shadow: 0 2px 4px rgba(0,0,0,0.5);
}
h1 a:hover,
h1 a:not(.button):hover,
:root.theme-dark h1 a:hover,
:root.theme-dark h1 a:not(.button):hover,
:root.theme-auto h1 a:hover,
:root.theme-auto h1 a:not(.button):hover {
	color: #4899F7;
}
body {
	font-size:var(--scale-1);           /* 20px */
  	line-height:1.6;
}
.container p {
	margin:0 0 var(--spacing-xl) 0;
	font-size:var(--scale-1);
	line-height:1.6;
	color: #ffffff;
	text-shadow: 0 1px 3px rgba(0,0,0,0.5);
	pointer-events: auto;
}

/* Container spacing */
.container {
	padding:var(--spacing-xl) var(--spacing-m) 0 var(--spacing-m);
	text-align:center;
}

/* Footer */
footer {
	margin:var(--spacing-xxl) 0;            /* 4rem (64px) top and bottom */
    font-size:var(--scale-0);
    text-align: center;
}

/* Responsive adjustments */
@media (max-width:34.375rem) {              /* 550px */
  h1 {
	font-size:var(--scale-4);
}
body {
	font-size:var(--scale-0);
}
.container p {
	font-size:var(--scale-0);
}
.avatar {
	margin-bottom:var(--spacing-m);
}
footer {
	margin:var(--spacing-xl) 0;         	/* 3rem (48px) top and bottom */
}
}

/* Links
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  a {
	color:#2457F5;
	text-decoration:underline;
	pointer-events: auto;
}
a:hover {
	color:#083BDA;
}

/* Buttons
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/* Background Image behind title and subtitle
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.title-background {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  z-index: -1;
  pointer-events: none;
  margin-top: 2rem;
}

.title-background img {
  width: auto;
  height: auto;
  max-width: 100%;
  opacity: 0.15;
}

/* Button Stack - Grid Layout
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.button-stack {
	display: grid;
	grid-template-columns: repeat(3, 1fr);
	gap: 1rem;
	justify-content: center;
	justify-items: center;
	max-width: 60rem;
	margin: 0 auto;
}

.button,button {
	display:inline-flex;
	align-items:center;
	justify-content:center;
	width:100%;
	max-width: 18.75rem;
	min-height:3rem;
	padding:0.75rem 1rem;
	font-size:1.125rem;
	font-weight:700;
	text-decoration:none;
	white-space:normal;
	background-color:rgba(45, 156, 240, 0.7);
	color:#ffffff;
	border:1px solid #ffffff;
	border-radius:0.5rem;
	cursor:pointer;
	box-sizing:border-box;
	hyphens:auto;
	text-align:center;
	line-height:1.3;
	box-shadow: 0 2px 4px rgba(0,0,0,0.05);
	text-shadow: none;
	transition: all 0.3s ease;
	pointer-events: auto;
}

.button:hover,button:hover {
	background-color:rgba(255, 255, 255, 0.7);
	border-color: rgba(255, 255, 255, 0.6);
	color: #1a1a1a;
	text-shadow: none;
	box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

/* Center the last button when it's alone in the row (odd number of buttons) */
/* Rule removed for 3-column layout */

/* Middle Footer - between two rows of buttons */
.middle-footer {
	text-align: center;
	font-size: var(--scale-0);
	margin: var(--spacing-l) 0;
	padding: var(--spacing-s) 0;
	color: #ffffff;
	text-shadow: 0 1px 3px rgba(0, 0, 0, 0.4);
}

.middle-footer a,
footer a,
:root.theme-dark .middle-footer a,
:root.theme-auto .middle-footer a {
	color: #ffffff !important;
	text-decoration: underline;
	transition: opacity 0.2s ease;
}

.middle-footer a:hover,
footer a:hover,
:root.theme-dark .middle-footer a:hover,
:root.theme-auto .middle-footer a:hover {
	color: #ffffff !important;
	opacity: 0.8;
}

/* Facebook Link - inline-block to restrict click area */
.facebook-link {
	display: inline-block;
}

/* Icons
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.icon {
	width:1.25rem;
	height:1.25rem;
	margin-right:0.5rem;
	flex-shrink:0;
}

/* Avatar
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.avatar {
	width: 8rem;             /* 128px */
	height: 8rem;
	object-fit: cover;
	background-position: center;
	margin-bottom: var(--spacing-l);
  }

   /* Modifier for no avatar rounding */
   .avatar--none {
	border-radius: 0%;
  }

  /* Modifier for rounded avatar */
  .avatar--rounded {
	border-radius: 50%;
  }

  /* Modifier for slightly rounded corners */
  .avatar--soft {
	border-radius: 0.5rem;   /* 8px rounded corners */
  }

/* Theme System
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/* Light theme is default above */

/* Dark theme */
:root.theme-dark {
	color-scheme:dark;
	background-color:transparent;
}
:root.theme-dark :focus-visible {
	outline: 2px solid #4899F7;
	outline-offset: 2px;
  }
:root.theme-dark body {
	background-color:transparent;
	color:#ffffff;
}
:root.theme-dark .button,
:root.theme-dark button {
	background-color:rgba(45, 156, 240, 0.7);
	color:#ffffff;
	border:1px solid #ffffff;
	text-shadow: none;
}
:root.theme-dark .button:hover,
:root.theme-dark button:hover {
	background-color:rgba(255, 255, 255, 0.7);
	border-color:rgba(255, 255, 255, 0.6);
	color:#1a1a1a;
	text-shadow: none;
}
:root.theme-dark a:not(.button) {
	color:#ffffff;
}
:root.theme-dark a:not(.button):hover {
	color:#7AB8FF;
}

/* Auto theme */
:root.theme-auto {
	color-scheme:light dark;
	background-color:transparent;
}
@media (prefers-color-scheme:dark) {
	:root.theme-auto {
	background-color:transparent;
	}
	:root.theme-auto body {
	background-color:transparent;
	color:#ffffff;
}
:root.theme-auto .button,
:root.theme-auto button {
	background-color:rgba(45, 156, 240, 0.7);
	color:#ffffff;
	border:1px solid #ffffff;
	text-shadow: none;
}
:root.theme-auto .button:hover,
:root.theme-auto button:hover {
	background-color:rgba(255, 255, 255, 0.7);
	border-color:rgba(255, 255, 255, 0.6);
	color:#1a1a1a;
	text-shadow: none;
}
:root.theme-auto :focus-visible {
    outline: 2px solid #4899F7;
    outline-offset: 2px;
  }
:root.theme-auto a:not(.button) {
	color:#ffffff;
}
:root.theme-auto a:not(.button):hover {
	color:#7AB8FF;
}
}

/* Button Text Color Override
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    .button:hover,button:hover {
	color:var(--button-text);
}

/* Responsive Typography
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  @media (max-width:34.375rem) {            /* 550px */
    h1 {
	font-size:2rem;                         /* 32px */
	}
	body {
	font-size:1rem;                     		/* 16px */
	}
}

/* Responsive Button Stack - Tablet Two Columns
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@media (max-width:62rem) {                  /* 992px */
	.button-stack {
		grid-template-columns: repeat(2, 1fr);
		max-width: 40rem;
	}
}

/* Responsive Button Stack - Mobile Single Column
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@media (max-width:48rem) {                  /* 768px */
	.button-stack {
		grid-template-columns: 1fr;
		gap: 0.75rem;
		justify-items: center;
	}
	/* Middle footer responsive adjustment */
	.middle-footer {
		margin: var(--spacing-m) 0;
		padding: var(--spacing-xs) 0;
	}
	/* Reduce airplane size on mobile */
	.airplane-wrapper {
		width: 64px;
	}
}

/* Privacy Page Styles
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nav {
	margin:var(--spacing-l) 0;
	text-align:left;
}
section {
	margin:var(--spacing-xl) 0;
	text-align:left;
}
h2 {
	font-size:var(--scale-3);
	font-weight:700;
	margin-bottom:var(--spacing-m);
}
h3 {
	font-size:var(--scale-2);
	font-weight:600;
	margin:var(--spacing-l) 0 var(--spacing-s) 0;
}
ul {
	list-style:none;
	padding:0;
	margin:0 0 var(--spacing-m) 0;
}
ul li {
	margin-bottom:var(--spacing-xs);
}

/* Privacy page specific responsive adjustments */
  @media (max-width:34.375rem) {
	h2 {
	font-size:var(--scale-2);
	}
	h3 {
	font-size:var(--scale-1);
	}
	section {
	margin:var(--spacing-l) 0;
	}
}

/* Font Face Definitions
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@font-face {
	font-display:swap;
	font-family:'Open Sans';
	font-style:normal;
	font-weight:400;
	src:url('../fonts/open-sans-v34-vietnamese_latin-ext_latin_hebrew_greek-ext_greek_cyrillic-ext_cyrillic-regular.eot');
	src:url('../fonts/open-sans-v34-vietnamese_latin-ext_latin_hebrew_greek-ext_greek_cyrillic-ext_cyrillic-regular.eot?#iefix') format('embedded-opentype'),url('../fonts/open-sans-v34-vietnamese_latin-ext_latin_hebrew_greek-ext_greek_cyrillic-ext_cyrillic-regular.woff2') format('woff2'),url('../fonts/open-sans-v34-vietnamese_latin-ext_latin_hebrew_greek-ext_greek_cyrillic-ext_cyrillic-regular.woff') format('woff'),url('../fonts/open-sans-v34-vietnamese_latin-ext_latin_hebrew_greek-ext_greek_cyrillic-ext_cyrillic-regular.ttf') format('truetype'),url('../fonts/open-sans-v34-vietnamese_latin-ext_latin_hebrew_greek-ext_greek_cyrillic-ext_cyrillic-regular.svg#OpenSans') format('svg');
}
@font-face {
	font-display:swap;
	font-family:'Open Sans';
	font-style:normal;
	font-weight:600;
	src:url('../fonts/open-sans-v34-vietnamese_latin-ext_latin_hebrew_greek-ext_greek_cyrillic-ext_cyrillic-600.eot');
	src:url('../fonts/open-sans-v34-vietnamese_latin-ext_latin_hebrew_greek-ext_greek_cyrillic-ext_cyrillic-600.eot?#iefix') format('embedded-opentype'),url('../fonts/open-sans-v34-vietnamese_latin-ext_latin_hebrew_greek-ext_greek_cyrillic-ext_cyrillic-600.woff2') format('woff2'),url('../fonts/open-sans-v34-vietnamese_latin-ext_latin_hebrew_greek-ext_greek_cyrillic-ext_cyrillic-600.woff') format('woff'),url('../fonts/open-sans-v34-vietnamese_latin-ext_latin_hebrew_greek-ext_greek_cyrillic-ext_cyrillic-600.ttf') format('truetype'),url('../fonts/open-sans-v34-vietnamese_latin-ext_latin_hebrew_greek-ext_greek_cyrillic-ext_cyrillic-600.svg#OpenSans') format('svg');
}
@font-face {
	font-display:swap;
	font-family:'Open Sans';
	font-style:normal;
	font-weight:700;
	src:url('../fonts/open-sans-v34-vietnamese_latin-ext_latin_hebrew_greek-ext_greek_cyrillic-ext_cyrillic-700.eot');
	src:url('../fonts/open-sans-v34-vietnamese_latin-ext_latin_hebrew_greek-ext_greek_cyrillic-ext_cyrillic-700.eot?#iefix') format('embedded-opentype'),url('../fonts/open-sans-v34-vietnamese_latin-ext_latin_hebrew_greek-ext_greek_cyrillic-ext_cyrillic-700.woff2') format('woff2'),url('../fonts/open-sans-v34-vietnamese_latin-ext_latin_hebrew_greek-ext_greek_cyrillic-ext_cyrillic-700.woff') format('woff'),url('../fonts/open-sans-v34-vietnamese_latin-ext_latin_hebrew_greek-ext_greek_cyrillic-ext_cyrillic-700.ttf') format('truetype'),url('../fonts/open-sans-v34-vietnamese_latin-ext_latin_hebrew_greek-ext_greek_cyrillic-ext_cyrillic-700.svg#OpenSans') format('svg');
}
@font-face {
	font-display:swap;
	font-family:'Open Sans';
	font-style:normal;
	font-weight:800;
	src:url('../fonts/open-sans-v34-vietnamese_latin-ext_latin_hebrew_greek-ext_greek_cyrillic-ext_cyrillic-800.eot');
	src:url('../fonts/open-sans-v34-vietnamese_latin-ext_latin_hebrew_greek-ext_greek_cyrillic-ext_cyrillic-800.eot?#iefix') format('embedded-opentype'),url('../fonts/open-sans-v34-vietnamese_latin-ext_latin_hebrew_greek-ext_greek_cyrillic-ext_cyrillic-800.woff2') format('woff2'),url('../fonts/open-sans-v34-vietnamese_latin-ext_latin_hebrew_greek-ext_greek_cyrillic-ext_cyrillic-800.woff') format('woff'),url('../fonts/open-sans-v34-vietnamese_latin-ext_latin_hebrew_greek-ext_greek_cyrillic-ext_cyrillic-800.ttf') format('truetype'),url('../fonts/open-sans-v34-vietnamese_latin-ext_latin_hebrew_greek-ext_greek_cyrillic-ext_cyrillic-800.svg#OpenSans') format('svg');
}

.highlight-title {
  background: linear-gradient(to top, rgba(255, 235, 59, 0.9) 0%, rgba(255, 235, 59, 0) 100%);
  background-repeat: no-repeat;
  background-size: 100% 75%;
  background-position: bottom;
  padding: 0 4px;
  border-radius: 2px;
  text-decoration: none;
  color: inherit;
}

/* 引入 LXGW WenKai 字体 */
h1,
.container p,
.middle-footer,
.button {
  font-family: 'LXGW WenKai', "Open Sans", system-ui, sans-serif;
}

/* Hide scrollbar for Chrome, Safari and Opera */
::-webkit-scrollbar {
  display: none;
}

/* Hide scrollbar for IE, Edge and Firefox */
html, body {
  -ms-overflow-style: none;
  scrollbar-width: none;
}