@import url("https://fonts.googleapis.com/css?family=Nunito+Sans");

:root {
  --main: #1d2129;
  --white: #fff;
  --primary: #86909c;
  --primary-dark: #6b7480;
  --primary-light: #a1a9b3;
  --menu-shadow: rgba(0, 0, 0, 0.15);
}

html,
body {
  height: 100%;
}

body {
  display: -webkit-box;
  display: flex;
  -webkit-box-align: center;
  align-items: center;
  -webkit-box-pack: center;
  justify-content: center;
  font-family: "Nunito Sans";
  color: var(--main);
  font-size: 1em;
}

button {
  font-family: "Nunito Sans";
}

ul {
  list-style-type: none;
  -webkit-padding-start: 35px;
  padding-inline-start: 35px;
}

svg {
  width: 100%;
  visibility: hidden;
  max-height: 450px;
  margin: 0 auto;
  display: block;
}

h1 {
  font-size: 7.5em;
  margin: 15px 0px;
  font-weight: bold;
}

h2 {
  font-weight: bold;
  margin-bottom: 15px;
}

.text-content {
  padding: 20px 0;
}

main {
  min-height: 100vh;
  width: 100vw;
  background: var(--white);
  display: -webkit-box;
  display: flex;
  -webkit-box-align: center;
  align-items: center;
  -webkit-box-pack: center;
  justify-content: center;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
  flex-direction: column;
  padding: 20px;
  box-sizing: border-box;
}

.hamburger-menu {
  border: none;
  position: absolute;
  top: 0;
  left: 0;
  padding: 35px;
  z-index: 2;
  transition: all 0.3s ease;
}

.hamburger-menu button {
  position: relative;
  width: 30px;
  height: 22px;
  border: none;
  background: none;
  padding: 0;
  cursor: pointer;
  border-radius: 50%;
  transition: transform 0.3s ease;
}

.hamburger-menu button span {
  position: absolute;
  height: 3px;
  background: var(--primary-dark);
  width: 100%;
  left: 0px;
  top: 0px;
  -webkit-transition: 0.3s ease-in-out;
  transition: 0.3s ease-in-out;
  border-radius: 2px;
}

.hamburger-menu button span:nth-child(2) {
  top: 9px;
}

.hamburger-menu button span:nth-child(3) {
  top: 18px;
}

.hamburger-menu [data-state="open"] span:first-child {
  -webkit-transform: rotate(45deg);
  transform: rotate(45deg);
  top: 10px;
  background: var(--white);
}

.hamburger-menu [data-state="open"] span:nth-child(2) {
  width: 0%;
  opacity: 0;
}

.hamburger-menu [data-state="open"] span:nth-child(3) {
  -webkit-transform: rotate(-45deg);
  transform: rotate(-45deg);
  top: 10px;
  background: var(--white);
}

.hamburger-menu button:focus {
  outline: none;
}

.hamburger-menu button:hover {
  /* 移除放大效果 */
  transform: none;
}

.hamburger-menu button:hover span {
  background: var(--primary);
}

nav {
  position: absolute;
  height: 100%;
  top: 0;
  left: 0;
  background: linear-gradient(135deg, var(--primary-light), var(--primary), var(--primary-dark));
  color: var(--white);
  width: 300px;
  z-index: 1;
  padding-top: 80px;
  -webkit-transform: translateX(-100%);
  transform: translateX(-100%);
  -webkit-transition: 0.4s cubic-bezier(0.52, 0.01, 0.8, 1);
  transition: 0.4s cubic-bezier(0.52, 0.01, 0.8, 1);
  border-right: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  flex-direction: column;
}

nav li {
  -webkit-transform: translateX(-20px);
  transform: translateX(-20px);
  -webkit-transition: 0.4s cubic-bezier(0.44, 0.09, 0.46, 0.84);
  transition: 0.4s cubic-bezier(0.44, 0.09, 0.46, 0.84);
  opacity: 0;
  margin-bottom: 0;
  position: relative;
  list-style: none;
}

nav a {
  display: flex;
  align-items: center;
  font-size: 1.3em;
  font-weight: bold;
  text-decoration: none;
  color: var(--white);
  -webkit-transition: 0.3s ease-in-out;
  transition: 0.3s ease-in-out;
  padding: 5px 15px;
  border-radius: 4px;
  position: relative;
  overflow: hidden;
  z-index: 1;
}

nav a svg {
  margin-right: 10px;
  min-width: 16px;
}

nav a:hover {
  text-decoration: none;
  color: var(--white);
  text-shadow: 0 0 5px rgba(255, 255, 255, 0.5);
}

nav a:before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: rgba(255, 255, 255, 0.1);
  transition: 0.3s ease-in-out;
  z-index: -1;
  border-radius: 4px;
}

nav a:hover:before {
  left: 0;
}

nav[data-state="open"] {
  -webkit-transform: translateX(0%);
  transform: translateX(0%);
  box-shadow: 2px 0 15px var(--menu-shadow);
}

nav[data-state="open"] ul li:nth-child(1) {
  -webkit-transition-delay: 0.1s;
  transition-delay: 0.1s;
  -webkit-transform: translateX(0px);
  transform: translateX(0px);
  opacity: 1;
}

nav[data-state="open"] ul li:nth-child(2) {
  -webkit-transition-delay: 0.2s;
  transition-delay: 0.2s;
  -webkit-transform: translateX(0px);
  transform: translateX(0px);
  opacity: 1;
}

nav[data-state="open"] ul li:nth-child(3) {
  -webkit-transition-delay: 0.3s;
  transition-delay: 0.3s;
  -webkit-transform: translateX(0px);
  transform: translateX(0px);
  opacity: 1;
}

nav[data-state="open"] ul li:nth-child(4) {
  -webkit-transition-delay: 0.4s;
  transition-delay: 0.4s;
  -webkit-transform: translateX(0px);
  transform: translateX(0px);
  opacity: 1;
}

nav ul {
  padding: 0 20px;
  margin: 20px 0;
  flex: 1;
}

.menu-header,
.menu-footer {
  padding: 0 20px;
}

.menu-header h3 {
  color: var(--white);
  font-size: 1.5em;
  margin: 0;
  padding: 10px 0;
}

.menu-divider {
  height: 1px;
  background: linear-gradient(to right, rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0.3), rgba(255, 255, 255, 0.1));
  margin: 5px 0;
}

.menu-footer {
  margin-top: auto;
  padding: 0 20px 20px;
}

.menu-footer p {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.9em;
  text-align: center;
  padding: 10px 0;
  margin: 0;
}

.btn {
  overflow: hidden;
  background: transparent;
  position: relative;
  padding: 8px 50px;
  border-radius: 30px;
  cursor: pointer;
  font-size: 1em;
  letter-spacing: 2px;
  -webkit-transition: 0.2s ease;
  transition: 0.2s ease;
  font-weight: bold;
  margin: 5px 0px;
}

.btn.green {
  border: 4px solid var(--primary);
  color: var(--main);
}

.btn.green:before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 0%;
  height: 100%;
  background: var(--primary);
  z-index: -1;
  -webkit-transition: 0.2s ease;
  transition: 0.2s ease;
}

.btn.green:hover {
  color: var(--white);
  background: var(--primary);
  -webkit-transition: 0.2s ease;
  transition: 0.2s ease;
}

@media screen and (max-width: 768px) {
  body {
    display: block;
  }

  .container {
    margin-top: 70px;
    margin-bottom: 70px;
    padding-left: 30px;
    padding-right: 30px;
  }

  h1 {
    font-size: 5em;
  }

  h2 {
    font-size: 1.5em;
  }

  .btn {
    padding: 8px 30px;
    font-size: 0.9em;
  }

  .hamburger-menu {
    padding: 30px;
  }

  nav {
    width: 250px;
  }
}

@media screen and (max-width: 480px) {
  h1 {
    font-size: 4em;
  }

  h2 {
    font-size: 1.2em;
  }

  p {
    font-size: 0.9em;
  }

  .btn {
    padding: 6px 25px;
    font-size: 0.8em;
  }

  nav {
    width: 100%;
  }

  nav a {
    font-size: 1.1em;
    padding: 8px 15px;
  }

  nav ul {
    padding: 0 30px;
  }

  .menu-footer {
    padding: 0 30px 20px;
  }

  .hamburger-menu {
    padding: 30px;
  }

  .container {
    padding-left: 25px;
    padding-right: 25px;
    margin-top: 50px;
    margin-bottom: 50px;
  }

  .text-content {
    padding: 25px 0;
  }

  svg {
    max-height: 350px;
  }
}

@media screen and (max-width: 360px) {
  h1 {
    font-size: 3.5em;
  }

  .btn {
    padding: 5px 20px;
    letter-spacing: 1px;
  }

  .container {
    padding-left: 20px;
    padding-right: 20px;
    margin-top: 30px;
    margin-bottom: 30px;
  }

  svg {
    max-height: 300px;
  }

  .text-content {
    padding: 20px 0;
  }
  
  .hamburger-menu {
    padding: 30px;
  }
}