@font-face {
	font-family: 'Ubuntu'; 
	src: url(Ubuntu-Regular.html); 
  font-display: swap;
}

@font-face {
	font-family: 'Ubuntu Bold'; 
	src: url(Ubuntu-Bold.html); 
  font-display: swap;
}

:root {
  /* 孟加拉国旗灵感：深绿底 + 红圆（点缀）+ 节庆金 */
  --bd-green-flag: #4499ee;
  --bd-red-flag: #99ccff;
  --bg-base: #003399;
  --bg-mid: #1166cc;
  --bg-top: #1166cc;
  --accent-mint: #d0e8ff;
  --accent-gold: #99ccff;
  --accent-red: #d0e8ff;
  --text: #f0f8ff;
  --text-soft: #d0e8ff;
  --glass: rgba(17,102,204,0.52);
  --glass-border: rgba(153,204,255,0.18);
  --shadow-deep: 0 24px 48px rgba(0,51,153,0.55);
}

* {
  box-sizing: border-box;
  padding: 0;
  margin: 0;
}

html {
  scroll-behavior: smooth;
  height: 100%;
  background-color: var(--bg-base);
}

body {
  font-family: 'Ubuntu', sans-serif;
  font-size: 0.875rem;
  color: var(--text);
  min-height: 100%;
  height: 100%;
  position: relative;
  background-color: var(--bg-base);
  background-image:
    radial-gradient(circle at 1px 1px, rgba(240,248,255,0.04) 1px, transparent 0),
    linear-gradient(110deg, rgba(68,153,238,0.14) 0%, transparent 45%),
    linear-gradient(-130deg, rgba(153,204,255,0.07) 0%, transparent 40%),
    radial-gradient(ellipse 95% 70% at 50% -5%, rgba(68,153,238,0.22), transparent 52%),
    radial-gradient(ellipse 70% 55% at 92% 35%, rgba(153,204,255,0.1), transparent 50%),
    radial-gradient(ellipse 75% 50% at 8% 75%, rgba(68,153,238,0.16), transparent 48%),
    linear-gradient(168deg, var(--bg-base) 0%, var(--bg-mid) 40%, var(--bg-top) 70%, #003399 100%);
  background-size:
    28px 28px,
    100% 100%,
    100% 100%,
    100% 100%,
    100% 100%,
    100% 100%,
    100% 100%;
  background-attachment: fixed;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background:
    radial-gradient(ellipse 120% 80% at 50% 100%, rgba(0,51,153,0.92), transparent 55%),
    radial-gradient(ellipse 55% 40% at 50% 12%, rgba(153,204,255,0.06), transparent 55%),
    radial-gradient(ellipse 90% 55% at 50% 0%, rgba(240,248,255,0.025), transparent 45%);
}

.wrapper_1_m2_v12 {
  position: relative;
  z-index: 1;
  min-height: 100%;
  display: flex;
  flex-direction: column;
}

h1 {
  font-family: 'Ubuntu Bold', sans-serif;
  font-size: 1.5rem;
}

p {
  line-height: 160%;
}

ul {
  list-style: none;
}

a {
  text-decoration: none;
}

.container {
  max-width: 1240px;
  margin-right: 1.5rem;
  margin-left: 1.5rem;
}

.section {
  padding: 2rem 0;
}

.grid {
  display: grid;
  gap: 1.5rem;
}

.main {
  overflow: hidden;
  flex: 1 1 auto;
}

.header_1_m2_v12 {
  width: 100%;
  position: fixed;
  top: 0;
  left: 0;
  z-index: 100;
  background: linear-gradient(
    180deg,
    rgba(17,102,204,0.94) 0%,
    rgba(0,51,153,0.9) 100%
  );
  backdrop-filter: blur(16px) saturate(1.12);
  -webkit-backdrop-filter: blur(16px) saturate(1.12);
  border-bottom: 1px solid rgba(68,153,238,0.28);
  box-shadow:
    0 4px 28px rgba(0,51,153,0.5),
    0 1px 0 rgba(153,204,255,0.12) inset;
}

.nav_1_m2_v12 {
  height: 5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav__toggle_1_m2_v12 {
  cursor: pointer;
}

@media screen and (max-width: 1200px) {
  .nav__menu_1_m2_v12 {
    position: fixed;
    background: linear-gradient(195deg, #1166cc 0%, #1166cc 50%, #003399 100%);
    top: 0;
    right: -100%;
    width: 50%;
    height: 100%;
    transition: right .4s;
    padding-left: 2rem;
    border-left: 1px solid rgba(153,204,255,0.22);
    box-shadow: -12px 0 40px rgba(0,51,153,0.6);
  }
}

.nav__list_1_m2_v12 {
  padding: 4rem 0 3rem;
  display: flex;
  flex-direction: column;
  row-gap: 1rem;
}

.nav__link_1_m2_v12 {
  color: #f0f8ff;
  transition: color .6s;
  font-family: 'Ubuntu Bold', sans-serif;
  font-size: 1rem;
}

.nav__link_1_m2_v12:hover {
  color: var(--accent-mint);
}

.nav__close_1_m2_v12 {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  cursor: pointer;
}

.show-menu {
  right: 0;
}

.nav__buttons_1_m2_v12 {
  display: flex;
  gap: .25rem;
  width: 100%;
  max-width: 200px;
}

.nav__button__first_1_m2_v12 {
  display: inline-block;
  background: linear-gradient(135deg, #4499ee 0%, #4499ee 55%, #4499ee 100%);
  padding: .75rem .75rem;
  color: #f0f8ff;
  font-family: 'Ubuntu Bold', sans-serif;
  font-size: 1rem;
  cursor: pointer;
  transition: background 0.35s, box-shadow 0.35s, transform 0.2s;
  border-radius: .5rem;
  box-shadow: 0 2px 18px rgba(68,153,238,0.45);
}

.nav__button__first_1_m2_v12:hover {
  background: linear-gradient(135deg, #4499ee 0%, #4499ee 50%, #4499ee 100%);
  box-shadow: 0 4px 22px rgba(68,153,238,0.5);
}

.nav__button__second_1_m2_v12 {
  display: inline-block;
  background: linear-gradient(135deg, #d0e8ff 0%, #99ccff 50%, #4499ee 100%);
  padding: .75rem 1rem;
  color: #f0f8ff;
  font-family: 'Ubuntu Bold', sans-serif;
  font-size: 1rem;
  cursor: pointer;
  transition: background 0.35s, box-shadow 0.35s;
  border-radius: .5rem;
  box-shadow: 0 2px 16px rgba(153,204,255,0.4);
}

.nav__button__second_1_m2_v12:hover {
  background: linear-gradient(135deg, #d0e8ff 0%, #99ccff 55%, #99ccff 100%);
}

.button_1_m2_v12 {
  display: inline-block;
  background: linear-gradient(135deg, #4499ee 0%, #4499ee 45%, #4499ee 100%);
  padding: 1.25rem 2rem;
  color: #f0f8ff;
  font-family: 'Ubuntu Bold', sans-serif;
  cursor: pointer;
  transition: background 0.35s, box-shadow 0.35s, transform 0.2s;
  text-align: center;
  margin-top: .5rem;
  border-radius: 1rem;
  font-size: 1rem;
  box-shadow: 0 4px 26px rgba(68,153,238,0.45);
}

.button_1_m2_v12:hover {
  background: linear-gradient(135deg, #4499ee 0%, #4499ee 40%, #4499ee 100%);
  box-shadow: 0 8px 34px rgba(68,153,238,0.4);
}

.second__button_1_m2_v12 {
  background: linear-gradient(135deg, #99ccff 0%, #99ccff 100%);
  color: #1166cc;
  box-shadow: 0 4px 22px rgba(153,204,255,0.35);
}

.second__button_1_m2_v12:hover {
  background: linear-gradient(135deg, #d0e8ff 0%, #99ccff 100%);
  box-shadow: 0 8px 30px rgba(153,204,255,0.4);
}

.large__button_1_m2_v12 {
  position: fixed;
  left: 0;
  bottom: 0;
  width: 100%;
  background: linear-gradient(92deg, #1166cc 0%, #4499ee 35%, #4499ee 70%, #1166cc 100%);
  color: #f0f8ff;
  padding: 1.5rem;
  font-family: 'Ubuntu Bold', sans-serif;
  cursor: pointer;
  text-align: center;
  border-top: 1px solid rgba(153,204,255,0.35);
  box-shadow:
    0 -10px 40px rgba(0,51,153,0.55),
    0 -1px 0 rgba(153,204,255,0.15) inset;
}

.main__screen__container_1_m2_v12 {
  margin-top: 5rem;
}

.main__screen__container_1_m2_v12 > .grid {
  padding: 1.5rem 1.75rem;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: 1.25rem;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 8px 32px rgba(0,51,153,0.25);
  align-content: center;
}

.main__screen__container_1_m2_v12 > img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 1.25rem;
  border: 1px solid rgba(240,248,255,0.08);
  box-shadow:
    var(--shadow-deep),
    0 0 0 1px rgba(68,153,238,0.12) inset;
  object-fit: cover;
}

.main h1 {
  color: #f0f8ff;
  text-shadow: 0 1px 28px rgba(68,153,238,0.2);
}

.main p {
  color: var(--text-soft);
}

.main .container > h1,
.main .container > p {
  max-width: 52rem;
}

.main .container > h1 {
  margin-bottom: 0.75rem;
  color: #f0f8ff;
}

.main .container > p {
  color: var(--text-soft);
  margin-bottom: 1rem;
}

.main h2 {
  font-family: 'Ubuntu Bold', sans-serif;
  font-size: 1.2rem;
  color: #f0f8ff;
  margin-top: 1.25rem;
  margin-bottom: 0.5rem;
}

.main p a {
  color: var(--accent-mint);
  text-decoration: underline;
  text-underline-offset: 0.15em;
}

.main p a:hover {
  color: #d0e8ff;
}


@media screen and (max-width: 340px) {

  .container {
    margin-left: 1rem;
    margin-right: 1rem;
  }


}

@media screen and (max-width: 768px) {

  .large__button_1_m2_v12 {
    font-size: 1.25rem;
  }

}

@media screen and (min-width: 768px) {

h1 {
  font-size: 3rem;
}

.main h2 {
  font-size: 1.65rem;
}

p {
  font-size: 1rem;
}



.large__button_1_m2_v12 {
  font-size: 2rem;
}

}


@media screen and (min-width: 1200px) {
  
  .nav__menu_1_m2_v12 {
    width: initial;
  }

  .nav__toggle_1_m2_v12,
  .nav__close_1_m2_v12 {
    display: none;
  }

  .nav_1_m2_v12 {
    display: flex;
    align-items: center;
    height: 5rem;
  }

  .nav__list_1_m2_v12 {
    height: 100%;
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
    padding: 0;
    align-items: center;
    column-gap: 1rem;
  }

  .main__screen__container_1_m2_v12 {
    grid-template-columns: repeat(2, 1fr);
    align-items: center;
  }

}

@media screen and (min-width: 1240px) {
  
  .container {
    margin-left: auto;
    margin-right: auto;
  }


}


.download__wrapp {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 20px;

  max-width: 220px;
  margin: 25px auto;
}

.download__link {
  display: flex;
  max-width: max-content;
  align-items: center;
  gap: 15px;
  padding: 0px 15px;
  border-radius: 50px;
  color: #f0f8ff;
  overflow: hidden;
  font-weight: 600;
  background: linear-gradient(135deg, #d0e8ff 0%, #4499ee 100%);
  transition: all 0.3s ease-in-out;
  margin: 0 auto;
  box-shadow: 0 4px 20px rgba(153,204,255,0.35);
}

.download__link img {
  border-radius: 0;
}

.download__img {
  padding: 10px 10px 10px 20px;
  margin-left: -16px;
  background: linear-gradient(135deg, #4499ee 0%, #4499ee 100%);
  transition: all 0.3s ease-in-out;
}


.download__link:hover {
  background: linear-gradient(135deg, #99ccff 0%, #99ccff 100%);
  color: #1166cc;
}
.download__link:hover .download__img {
  background: linear-gradient(135deg, #4499ee 0%, #4499ee 100%);
}