/*
 * icons.css — 内联 SVG 图标，替代 Bootstrap Icons 字体
 * 用法与 bi bi-xxx 完全一致，零字体请求
 */

/* 基础样式 */
.bi {
  display: inline-block;
  width: 1em;
  height: 1em;
  vertical-align: -0.125em;
  fill: currentColor;
  flex-shrink: 0;
}

/* ── 各图标 SVG ── */

.bi-arrow-right::before { content: none; }
.bi-arrow-right {
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath fill-rule='evenodd' d='M1 8a.5.5 0 0 1 .5-.5h11.793l-3.147-3.146a.5.5 0 0 1 .708-.708l4 4a.5.5 0 0 1 0 .708l-4 4a.5.5 0 0 1-.708-.708L13.293 8.5H1.5A.5.5 0 0 1 1 8'/%3E%3C/svg%3E") center/contain no-repeat;
}

.bi-book {
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M1 2.828c.885-.37 2.154-.769 3.388-.893 1.33-.134 2.458.063 3.112.752v9.746c-.935-.53-2.12-.603-3.213-.493-1.18.12-2.37.461-3.287.811zm7.5-.141c.654-.689 1.782-.886 3.112-.752 1.234.124 2.503.523 3.388.893v9.923c-.918-.35-2.107-.692-3.287-.81-1.094-.111-2.278-.039-3.213.492zM8 1.783C7.015.936 5.587.81 4.287.94c-1.514.153-3.042.672-3.994 1.105A.5.5 0 0 0 0 2.5v11a.5.5 0 0 0 .707.455c.882-.4 2.303-.881 3.68-1.02 1.409-.142 2.59.087 3.223.877a.5.5 0 0 0 .78 0c.633-.79 1.814-1.019 3.222-.877 1.378.139 2.8.62 3.681 1.02A.5.5 0 0 0 16 13.5v-11a.5.5 0 0 0-.293-.455c-.952-.433-2.48-.952-3.994-1.105C10.413.809 8.985.936 8 1.783'/%3E%3C/svg%3E") center/contain no-repeat;
}

.bi-box {
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M8.186 1.113a.5.5 0 0 0-.372 0L1.846 3.5 8 5.961 14.154 3.5zM15 4.239l-6.5 2.6v7.922l6.5-2.6V4.24zM7.5 14.762V6.838L1 4.239v7.923zM7.443.184a1.5 1.5 0 0 1 1.114 0l7.129 2.852A.5.5 0 0 1 16 3.5v8.662a1 1 0 0 1-.629.928l-7.185 2.874a.5.5 0 0 1-.372 0L.63 13.09a1 1 0 0 1-.63-.928V3.5a.5.5 0 0 1 .314-.464z'/%3E%3C/svg%3E") center/contain no-repeat;
}

.bi-broadcast {
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M3.05 3.05a7 7 0 0 0 0 9.9.5.5 0 0 1-.707.707 8 8 0 0 1 0-11.314.5.5 0 0 1 .707.707m2.122 2.122a4 4 0 0 0 0 5.656.5.5 0 1 1-.708.708 5 5 0 0 1 0-7.072.5.5 0 0 1 .708.708m5.656-.708a.5.5 0 0 1 .708 0 5 5 0 0 1 0 7.072.5.5 0 1 1-.708-.708 4 4 0 0 0 0-5.656.5.5 0 0 1 0-.708m2.122-2.12a.5.5 0 0 1 .707 0 8 8 0 0 1 0 11.313.5.5 0 0 1-.707-.707 7 7 0 0 0 0-9.9.5.5 0 0 1 0-.707zM10 8a2 2 0 1 1-4 0 2 2 0 0 1 4 0'/%3E%3C/svg%3E") center/contain no-repeat;
}

.bi-card-list {
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M14.5 3a.5.5 0 0 1 .5.5v9a.5.5 0 0 1-.5.5h-13a.5.5 0 0 1-.5-.5v-9a.5.5 0 0 1 .5-.5zm-13-1A1.5 1.5 0 0 0 0 3.5v9A1.5 1.5 0 0 0 1.5 14h13a1.5 1.5 0 0 0 1.5-1.5v-9A1.5 1.5 0 0 0 14.5 2z'/%3E%3Cpath d='M5 8a.5.5 0 0 1 .5-.5h7a.5.5 0 0 1 0 1h-7A.5.5 0 0 1 5 8m0-2.5a.5.5 0 0 1 .5-.5h7a.5.5 0 0 1 0 1h-7a.5.5 0 0 1-.5-.5m0 5a.5.5 0 0 1 .5-.5h7a.5.5 0 0 1 0 1h-7a.5.5 0 0 1-.5-.5m-1-5a.5.5 0 1 1-1 0 .5.5 0 0 1 1 0M4 8a.5.5 0 1 1-1 0 .5.5 0 0 1 1 0m0 2.5a.5.5 0 1 1-1 0 .5.5 0 0 1 1 0'/%3E%3C/svg%3E") center/contain no-repeat;
}

.bi-chat-dots {
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M5 8a1 1 0 1 1-2 0 1 1 0 0 1 2 0m4 0a1 1 0 1 1-2 0 1 1 0 0 1 2 0m3 1a1 1 0 1 0 0-2 1 1 0 0 0 0 2'/%3E%3Cpath d='m2.165 15.803.02-.004c1.83-.363 2.948-.842 3.468-1.105A9 9 0 0 0 8 15c4.418 0 8-3.134 8-7s-3.582-7-8-7-8 3.134-8 7c0 1.76.743 3.37 1.97 4.6a10.4 10.4 0 0 1-.524 2.318l-.003.011a11 11 0 0 1-.244.637c-.079.186.074.394.273.362a22 22 0 0 0 .693-.125m.8-3.108a1 1 0 0 0-.287-.801C1.618 10.83 1 9.468 1 8c0-3.192 3.004-6 7-6s7 2.808 7 6-3.004 6-7 6a8 8 0 0 1-2.088-.272 1 1 0 0 0-.711.074c-.387.196-1.24.57-2.634.893a11 11 0 0 0 .398-2'/%3E%3C/svg%3E") center/contain no-repeat;
}

.bi-clock {
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M8 3.5a.5.5 0 0 0-1 0V9a.5.5 0 0 0 .252.434l3.5 2a.5.5 0 0 0 .496-.868L8 8.71z'/%3E%3Cpath d='M8 16A8 8 0 1 0 8 0a8 8 0 0 0 0 16m7-8A7 7 0 1 1 1 8a7 7 0 0 1 14 0'/%3E%3C/svg%3E") center/contain no-repeat;
}

.bi-display {
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M0 4s0-2 2-2h12s2 0 2 2v6s0 2-2 2h-4q0 1 .25 1.5H11a.5.5 0 0 1 0 1H5a.5.5 0 0 1 0-1h.75Q6 13 6 12H2s-2 0-2-2zm1.398-.855a.76.76 0 0 0-.254.302A1.5 1.5 0 0 0 1 4.01V10c0 .325.078.502.145.602q.105.156.302.254a1.5 1.5 0 0 0 .538.143L2.01 11H14c.325 0 .502-.078.602-.145a.76.76 0 0 0 .254-.302 1.5 1.5 0 0 0 .143-.538L15 9.99V4c0-.325-.078-.502-.145-.602a.76.76 0 0 0-.302-.254A1.5 1.5 0 0 0 13.99 3H2c-.325 0-.502.078-.602.145'/%3E%3C/svg%3E") center/contain no-repeat;
}

.bi-exclamation-triangle {
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M7.938 2.016A.13.13 0 0 1 8.002 2a.13.13 0 0 1 .063.016.15.15 0 0 1 .054.057l6.857 11.667c.036.06.035.124.002.183a.2.2 0 0 1-.054.06.1.1 0 0 1-.066.017H1.146a.1.1 0 0 1-.066-.017.2.2 0 0 1-.054-.06.18.18 0 0 1 .002-.183L7.884 2.073a.15.15 0 0 1 .054-.057m1.044-.45a1.13 1.13 0 0 0-1.96 0L.165 13.233c-.457.778.091 1.767.98 1.767h13.713c.889 0 1.438-.99.98-1.767z'/%3E%3Cpath d='M7.002 12a1 1 0 1 1 2 0 1 1 0 0 1-2 0M7.1 5.995a.905.905 0 1 1 1.8 0l-.35 3.507a.552.552 0 0 1-1.1 0z'/%3E%3C/svg%3E") center/contain no-repeat;
}

.bi-file-text {
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M5 4a.5.5 0 0 0 0 1h6a.5.5 0 0 0 0-1zm-.5 2.5A.5.5 0 0 1 5 6h6a.5.5 0 0 1 0 1H5a.5.5 0 0 1-.5-.5M5 8a.5.5 0 0 0 0 1h6a.5.5 0 0 0 0-1zm0 2a.5.5 0 0 0 0 1h3a.5.5 0 0 0 0-1z'/%3E%3Cpath d='M2 2a2 2 0 0 1 2-2h8a2 2 0 0 1 2 2v12a2 2 0 0 1-2 2H4a2 2 0 0 1-2-2zm10-1H4a1 1 0 0 0-1 1v12a1 1 0 0 0 1 1h8a1 1 0 0 0 1-1V2a1 1 0 0 0-1-1'/%3E%3C/svg%3E") center/contain no-repeat;
}

.bi-github {
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M8 0C3.58 0 0 3.58 0 8c0 3.54 2.29 6.53 5.47 7.59.4.07.55-.17.55-.38 0-.19-.01-.82-.01-1.49-2.01.37-2.53-.49-2.69-.94-.09-.23-.48-.94-.82-1.13-.28-.15-.68-.52-.01-.53.63-.01 1.08.58 1.23.82.72 1.21 1.87.87 2.33.66.07-.52.28-.87.51-1.07-1.78-.2-3.64-.89-3.64-3.95 0-.87.31-1.59.82-2.15-.08-.2-.36-1.02.08-2.12 0 0 .67-.21 2.2.82.64-.18 1.32-.27 2-.27s1.36.09 2 .27c1.53-1.04 2.2-.82 2.2-.82.44 1.1.16 1.92.08 2.12.51.56.82 1.27.82 2.15 0 3.07-1.87 3.75-3.65 3.95.29.25.54.73.54 1.48 0 1.07-.01 1.93-.01 2.2 0 .21.15.46.55.38A8.01 8.01 0 0 0 16 8c0-4.42-3.58-8-8-8'/%3E%3C/svg%3E") center/contain no-repeat;
}

.bi-journal-text {
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M5 10.5a.5.5 0 0 1 .5-.5h2a.5.5 0 0 1 0 1h-2a.5.5 0 0 1-.5-.5m0-2a.5.5 0 0 1 .5-.5h5a.5.5 0 0 1 0 1h-5a.5.5 0 0 1-.5-.5m0-2a.5.5 0 0 1 .5-.5h5a.5.5 0 0 1 0 1h-5a.5.5 0 0 1-.5-.5m0-2a.5.5 0 0 1 .5-.5h5a.5.5 0 0 1 0 1h-5a.5.5 0 0 1-.5-.5'/%3E%3Cpath d='M3 0h10a2 2 0 0 1 2 2v12a2 2 0 0 1-2 2H3a2 2 0 0 1-2-2v-1h1v1a1 1 0 0 0 1 1h10a1 1 0 0 0 1-1V2a1 1 0 0 0-1-1H3a1 1 0 0 0-1 1v1H1V2a2 2 0 0 1 2-2'/%3E%3Cpath d='M1 5v-.5a.5.5 0 0 1 1 0V5h.5a.5.5 0 0 1 0 1h-2a.5.5 0 0 1 0-1zm0 3v-.5a.5.5 0 0 1 1 0V8h.5a.5.5 0 0 1 0 1h-2a.5.5 0 0 1 0-1zm0 3v-.5a.5.5 0 0 1 1 0v.5h.5a.5.5 0 0 1 0 1h-2a.5.5 0 0 1 0-1z'/%3E%3C/svg%3E") center/contain no-repeat;
}

.bi-key {
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M0 8a4 4 0 0 1 7.465-2H14a.5.5 0 0 1 .354.146l1.5 1.5a.5.5 0 0 1 0 .708l-1.5 1.5a.5.5 0 0 1-.708 0L13 9.207l-.646.647a.5.5 0 0 1-.708 0L11 9.207l-.646.647a.5.5 0 0 1-.708 0L9 9.207l-.646.647A.5.5 0 0 1 8 10h-.535A4 4 0 0 1 0 8m4-3a3 3 0 1 0 2.712 4.285A.5.5 0 0 1 7.163 9h.63l.853-.854a.5.5 0 0 1 .708 0l.646.647.646-.647a.5.5 0 0 1 .708 0l.646.647.646-.647a.5.5 0 0 1 .708 0l.646.647.793-.793-1-1h-6.63a.5.5 0 0 1-.451-.285A3 3 0 0 0 4 5'/%3E%3Cpath d='M4 8a1 1 0 1 1-2 0 1 1 0 0 1 2 0'/%3E%3C/svg%3E") center/contain no-repeat;
}

.bi-lightning-charge-fill {
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M11.251.068a.5.5 0 0 1 .227.58L9.677 6.5H13a.5.5 0 0 1 .364.843l-8 8.5a.5.5 0 0 1-.842-.49L6.323 9.5H3a.5.5 0 0 1-.364-.843l8-8.5a.5.5 0 0 1 .615-.09z'/%3E%3C/svg%3E") center/contain no-repeat;
}

.bi-list {
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath fill-rule='evenodd' d='M2.5 12a.5.5 0 0 1 .5-.5h10a.5.5 0 0 1 0 1H3a.5.5 0 0 1-.5-.5m0-4a.5.5 0 0 1 .5-.5h10a.5.5 0 0 1 0 1H3a.5.5 0 0 1-.5-.5m0-4a.5.5 0 0 1 .5-.5h10a.5.5 0 0 1 0 1H3a.5.5 0 0 1-.5-.5'/%3E%3C/svg%3E") center/contain no-repeat;
}

.bi-people {
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M15 14s1 0 1-1-1-4-5-4-5 3-5 4 1 1 1 1zm-7.978-1L7 12.996c.001-.264.167-1.03.76-1.72C8.312 10.629 9.282 10 11 10c1.717 0 2.687.63 3.24 1.276.593.69.758 1.457.76 1.72l-.008.002-.014.002zM11 7a2 2 0 1 0 0-4 2 2 0 0 0 0 4m3-2a3 3 0 1 1-6 0 3 3 0 0 1 6 0M6.936 9.28a6 6 0 0 0-1.23-.247A7 7 0 0 0 5 9c-4 0-5 3-5 4q0 1 1 1h4.216A2.24 2.24 0 0 1 5 13c0-1.01.377-2.042 1.09-2.904.243-.294.526-.569.846-.816M4.92 10A5.5 5.5 0 0 0 4 13H1c0-.26.164-1.03.76-1.724.545-.636 1.492-1.256 3.16-1.275ZM1.5 5.5a3 3 0 1 1 6 0 3 3 0 0 1-6 0m3-2a2 2 0 1 0 0 4 2 2 0 0 0 0-4'/%3E%3C/svg%3E") center/contain no-repeat;
}

.bi-question-circle {
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M8 15A7 7 0 1 1 8 1a7 7 0 0 1 0 14m0 1A8 8 0 1 0 8 0a8 8 0 0 0 0 16'/%3E%3Cpath d='M5.255 5.786a.237.237 0 0 0 .241.247h.825c.138 0 .248-.113.266-.25.09-.656.54-1.134 1.342-1.134.686 0 1.314.343 1.314 1.168 0 .635-.374.927-.965 1.371-.673.489-1.206 1.06-1.168 1.987l.003.217a.25.25 0 0 0 .25.246h.811a.25.25 0 0 0 .25-.25v-.105c0-.718.273-.927 1.01-1.486.609-.463 1.244-.977 1.244-2.056 0-1.511-1.276-2.241-2.673-2.241-1.267 0-2.655.59-2.75 2.286m1.557 5.763c0 .533.425.927 1.01.927.609 0 1.028-.394 1.028-.927 0-.552-.42-.94-1.029-.94-.584 0-1.009.388-1.009.94'/%3E%3C/svg%3E") center/contain no-repeat;
}

.bi-robot {
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M6 12.5a.5.5 0 0 1 .5-.5h3a.5.5 0 0 1 0 1h-3a.5.5 0 0 1-.5-.5M3 8.062C3 6.76 4.235 5.765 5.53 5.886a26.6 26.6 0 0 0 4.94 0C11.765 5.765 13 6.76 13 8.062v1.157a.93.93 0 0 1-.765.935c-.845.147-2.34.346-4.235.346s-3.39-.2-4.235-.346A.93.93 0 0 1 3 9.219zm4.542-.827a.25.25 0 0 0-.217.068l-.92.9a25 25 0 0 1-1.871-.183.25.25 0 0 0-.068.495c.55.076 1.232.149 2.02.193a.25.25 0 0 0 .189-.071l.754-.736.847 1.71a.25.25 0 0 0 .404.062l.932-.97a25 25 0 0 0 1.922-.188.25.25 0 0 0-.068-.495c-.538.074-1.207.145-1.98.189a.25.25 0 0 0-.166.076l-.754.785-.842-1.7a.25.25 0 0 0-.182-.135'/%3E%3Cpath d='M8.5 1.866a1 1 0 1 0-1 0V3h-2A4.5 4.5 0 0 0 1 7.5V8a1 1 0 0 0-1 1v2a1 1 0 0 0 1 1v1a2 2 0 0 0 2 2h10a2 2 0 0 0 2-2v-1a1 1 0 0 0 1-1V9a1 1 0 0 0-1-1v-.5A4.5 4.5 0 0 0 10.5 3h-2zM14 7.5V13a1 1 0 0 1-1 1H3a1 1 0 0 1-1-1V7.5A3.5 3.5 0 0 1 5.5 4h5A3.5 3.5 0 0 1 14 7.5'/%3E%3C/svg%3E") center/contain no-repeat;
}

.bi-shield-check {
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M5.338 1.59a61 61 0 0 0-2.837.856.48.48 0 0 0-.328.39c-.554 4.157.726 7.19 2.253 9.188a10.7 10.7 0 0 0 2.287 2.233c.346.244.652.42.893.533q.18.085.293.118a1 1 0 0 0 .101.025 1 1 0 0 0 .1-.025q.114-.034.294-.118c.24-.113.547-.29.893-.533a10.7 10.7 0 0 0 2.287-2.233c1.527-1.997 2.807-5.031 2.253-9.188a.48.48 0 0 0-.328-.39c-.651-.213-1.75-.56-2.837-.855C9.552 1.29 8.531 1.067 8 1.067c-.53 0-1.552.223-2.662.524zM5.072.56C6.157.265 7.31 0 8 0s1.843.265 2.928.56c1.11.3 2.229.655 2.887.87a1.54 1.54 0 0 1 1.044 1.262c.596 4.477-.787 7.795-2.465 9.99a11.8 11.8 0 0 1-2.517 2.453 7 7 0 0 1-1.048.625c-.28.132-.581.24-.829.24s-.548-.108-.829-.24a7 7 0 0 1-1.048-.625 11.8 11.8 0 0 1-2.517-2.453C1.928 10.487.545 7.169 1.141 2.692A1.54 1.54 0 0 1 2.185 1.43 63 63 0 0 1 5.072.56'/%3E%3Cpath d='M10.854 5.146a.5.5 0 0 1 0 .708l-3 3a.5.5 0 0 1-.708 0l-1.5-1.5a.5.5 0 1 1 .708-.708L7.5 7.793l2.646-2.647a.5.5 0 0 1 .708 0'/%3E%3C/svg%3E") center/contain no-repeat;
}

.bi-star {
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M2.866 14.85c-.078.444.36.791.746.593l4.39-2.256 4.389 2.256c.386.198.824-.149.746-.592l-.83-4.73 3.522-3.356c.33-.314.16-.888-.282-.95l-4.898-.696L8.465.792a.513.513 0 0 0-.927 0L5.354 5.12l-4.898.696c-.441.062-.612.636-.283.95l3.523 3.356-.83 4.73zm4.905-2.767-3.686 1.894.694-3.957a.56.56 0 0 0-.163-.505L1.71 6.745l4.052-.576a.53.53 0 0 0 .393-.288L8 2.223l1.847 3.658a.53.53 0 0 0 .393.288l4.052.575-2.906 2.77a.56.56 0 0 0-.163.506l.694 3.957-3.686-1.894a.5.5 0 0 0-.461 0z'/%3E%3C/svg%3E") center/contain no-repeat;
}

/* ── 场景颜色覆盖 ── */

/* 导航栏品牌图标（绿色） */
.nav-brand .bi { filter: invert(58%) sepia(85%) saturate(412%) hue-rotate(101deg) brightness(96%) contrast(96%); }

/* 导航栏按钮图标（白色半透明） */
.btn-github .bi, .btn-docs .bi { filter: brightness(0) invert(1); }

/* Hero badge 图标（绿色） */
.hero-badge .bi { filter: invert(58%) sepia(85%) saturate(412%) hue-rotate(101deg) brightness(96%) contrast(96%); }

/* Hero CTA 按钮图标（白色） */
.btn-cta .bi { filter: brightness(0) invert(1); }

/* Feature card 图标（白色，图标在绿色背景上） */
.feature-icon .bi { filter: brightness(0) invert(1); }

/* Footer 图标（绿色） */
.site-footer .bi { filter: invert(58%) sepia(85%) saturate(412%) hue-rotate(101deg) brightness(96%) contrast(96%); }

/* 侧边栏图标（继承文字颜色，白色半透明） */
.sidebar-link .bi { filter: brightness(0) invert(1) opacity(0.7); }
.sidebar-link.active .bi, .sidebar-link:hover .bi { filter: brightness(0) invert(1); }

/* 移动端底部栏图标 */
.mobile-bar-btn .bi { filter: brightness(0) invert(1) opacity(0.6); }
.mobile-bar-btn.active .bi { filter: invert(58%) sepia(85%) saturate(412%) hue-rotate(101deg) brightness(96%) contrast(96%); }

/* 抽屉内章节链接图标 */
.drawer .sidebar-link .bi { filter: brightness(0) invert(1) opacity(0.7); }
.drawer .sidebar-link.active .bi, .drawer .sidebar-link:hover .bi { filter: brightness(0) invert(1); }