/*  Reset（只保留必要的） ============ */
html, body, div, span, h1, p, a, img, hr {
  margin: 0;
  padding: 0;
  border: 0;
  font-size: 100%;
  font: inherit;
  vertical-align: baseline;
}

body {
  line-height: 1;
  overflow-x: hidden;
  -webkit-text-size-adjust: none;
  background: #fff;
  margin: 0 auto;
  max-width: 800px;
}

*, *:before, *:after { box-sizing: border-box; }

/* ============ 容器 ============ */
.container {
  margin-left: auto;
  margin-right: auto;
  width: 51em;
}
.container.\37 5\25 { width: 38.25em; }   /* 你 HTML 里用的 container 75% */

/* 响应式：只改容器宽度 */
@media screen and (max-width: 1280px) {
  .container { width: 48em; }
  .container.\37 5\25 { width: 36em; }
}
@media screen and (max-width: 980px) {
  .container { width: 95%; }
  .container.\37 5\25 { width: 71.25%; }
}
@media screen and (max-width: 840px) {
  .container { width: 95% !important; }
  .container.\37 5\25 { width: 71.25%; }
}
@media screen and (max-width: 736px) {
  .container { width: 90% !important; }
  .container.\37 5\25 { width: 67.5%; }
}
@media screen and (max-width: 480px) {
  .container { width: 100% !important; }
  .container.\37 5\25 { width: 75%; }
}

/* ============ Basic ============ */
html, body { height: 100%; }

body, input, select, textarea {
  color: #6e6e6e;
  font-family: 'Source Sans Pro', sans-serif;
  font-size: 16pt;
  font-weight: 400;
  line-height: 1.75em;
}

a {
  transition: color .2s ease-in-out, border-bottom-color .2s ease-in-out;
  border-bottom: dotted 1px;
  color: #4eb980;
  text-decoration: none;
}
a:hover { border-bottom-color: transparent; }

p { margin: 0 0 1em; line-height: 22px; }

h1 {
  color: #5b5b5b;
  font-weight: 700;
  letter-spacing: .125em;
  line-height: 1.75em;
  margin-bottom: 1em;
  text-align: center;
}
h1 a { color: inherit; text-decoration: none; }

hr {
  border: 0;
  border-top: solid 1px rgba(224,224,224,.75);
  margin-bottom: 1.5em;
}

/* ============ Header（你页面的主区域） ============ */
#header {
  background-attachment: scroll, scroll, fixed;
  background-image: url("top-3200.svg"), url("overlay-1.png"), url("header.jpg");
  background-position: bottom center, top left, center center;
  background-repeat: repeat-x, repeat, no-repeat;
  background-size: 3200px 460px, auto, cover;
  color: rgba(255,255,255,.8);
  padding: 10em 0 16em;
  position: relative;
  text-align: center;
  margin-top: -16px;/*头顶距离缩小*/
}

#header:before, #header:after {
  background: rgba(224,224,224,.75);
  content: '';
  left: 50%;
  position: absolute;
  width: 1px;
  z-index: 0;
}
#header:before { height: calc(100% - 50px); opacity: .15; top: 0; }
#header:after  { bottom: 0; height: 50px; }

#header a { border-bottom-color: rgba(255,255,255,.35); color: #4eb980; }
#header a:hover { border-bottom-color: transparent; color: #fff; }

#header h1 { color: #fff; font-size: 2.5em; margin: 0; }
#header h1 a { color: #fff; }
#header p  { font-size: 1.5em; line-height: 1.5em; margin: .25em 0 0; }

#header > p:last-of-type {
  margin-top: 38px;
  margin-bottom: -38px;
}

/* 响应式：只改字号/间距 ============ */
@media screen and (max-width: 1680px) {
  body, input, select, textarea { font-size: 14pt; }
  #header { padding: 8em 0 16em; }
  #header h1 { font-size: 2.25em; }
  #header p  { font-size: 1.25em; line-height: 1.65em; }
}

@media screen and (max-width: 1280px) {
  body, input, select, textarea { font-size: 13pt; }
  #header {
    background-attachment: scroll, scroll, scroll;
    background-image: url("top-1600.svg"), url("overlay-1.png"), url("header.jpg");
    background-size: 1600px 230px, auto, cover;
    padding: 6em 0 12em;
  }
  #header:before { height: calc(100% - 25px); }
  #header:after  { height: 25px; }
  #header h1 { font-size: 2em; }
  #header p  { font-size: 1.15em; }
}

@media screen and (max-width: 980px) {
  body, input, select, textarea { font-size: 12pt; }
}

@media screen and (max-width: 736px) {
  #header {
    background-image: url("top-1280.svg"), url("overlay-1.png"), url("header.jpg");
    background-size: 1280px 184px, auto, cover;
    padding: 3em 0 7em;
  }
  #header:before { height: calc(100% - 20px); }
  #header:after  { height: 20px; }
  #header h1 { font-size: 1.25em; }
  #header p  { font-size: 1em; }
}

@media screen and (max-width: 480px) {
  #header { padding-left: 2em; padding-right: 2em; }
  #header br { display: none; }
}