/* ===== base ===== */
* { margin: 0; padding: 0; box-sizing: border-box; }
:root {
    --primary: #0f0a0a;
    --secondary: #1c1212;
    --accent: #ff3d3d;
    --gold: #ffd000;
    --light: #f0f0f0;
    --gray: #888;
    --radius: 10px;
    --shadow: 0 8px 32px rgba(0,0,0,0.18);
    --font: "Noto Sans SC", "Source Han Sans SC", "Microsoft YaHei", Arial, sans-serif;
    --transition: 0.3s cubic-bezier(.4,0,.2,1);
}
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body { font-family: var(--font); background: #fafafa; color: #222; line-height: 1.7; font-size: 16px; }
a { color: var(--accent); text-decoration: none; transition: color var(--transition); }
img { display: block; max-width: 100%; height: auto; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.sec { padding: 70px 0; }
.alt { background: #f5f7fa; }
.tc { text-align: center; }
.sec-title { font-size: 32px; font-weight: 700; color: var(--primary); margin-bottom: 12px; line-height: 1.3; }
.sec-title span { color: var(--accent); }
.sec-sub { color: #666; max-width: 680px; margin-bottom: 40px; }
.tc .sec-sub { margin-left: auto; margin-right: auto; }

/* ===== breadcrumb ===== */
.bc { background: #f5f5f5; padding: 10px 0; font-size: 13px; color: #666; }
.bc a { color: #666; }
.bc a:hover { color: var(--accent); }
.bc .bc-sep { margin: 0 8px; color: #bbb; }

/* ===== friend links ===== */
.flinks { background: #f7f8fa; padding: 32px 0; border-top: 1px solid #e8ecf2; }
.flinks .fl-title { font-size: 15px; font-weight: 700; color: var(--primary); margin-bottom: 14px; }
.flinks ul { list-style: none; display: flex; flex-wrap: wrap; gap: 9px 24px; }
.flinks a { color: #666; font-size: 13px; }
.flinks a:hover { color: var(--accent); }
.flinks.g2 ul { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px 26px; }
.flinks.g2 a { position: relative; padding-left: 13px; }
.flinks.g2 a::before { content: ''; position: absolute; left: 0; top: 50%; margin-top: -2px; width: 4px; height: 4px; background: var(--accent); border-radius: 50%; }
.flinks.col ul { display: grid; grid-template-columns: repeat(auto-fill, minmax(170px, 1fr)); gap: 11px 22px; }
.flinks.col a { display: block; padding: 7px 12px; background: #fff; border-radius: calc(var(--radius) - 4px); border: 1px solid #e8ecf2; }
.flinks.col a:hover { border-color: var(--accent); }
@media (max-width: 768px) {
    .flinks.g2 ul, .flinks.col ul { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

/* ===== modal ===== */
.modal-overlay { position: fixed; inset: 0; background: rgba(0,0,0,0.75); display: flex; align-items: center; justify-content: center; z-index: 2000; opacity: 0; pointer-events: none; transition: opacity var(--transition); padding: 20px; }
.modal-overlay.active { opacity: 1; pointer-events: auto; }
.modal-box { background: #fff; border-radius: var(--radius); max-width: 560px; width: 100%; padding: 30px; position: relative; max-height: 90vh; overflow-y: auto; }
.modal-close { position: absolute; top: 16px; right: 16px; width: 32px; height: 32px; border: none; background: #f0f0f0; border-radius: 50%; cursor: pointer; font-size: 18px; line-height: 1; color: #444; }
.modal-box h2 { font-size: 24px; margin-bottom: 8px; color: var(--primary); }
.modal-box .m-year { color: #888; margin-bottom: 16px; }
.modal-box .m-desc { color: #555; line-height: 1.8; margin-bottom: 16px; }
.modal-box .m-meta { color: var(--accent); font-size: 14px; font-weight: 600; }

/* ===== demo -> detail links (works cards / faq questions become real anchors) ===== */
a.wk1-btn { display: inline-block; text-align: center; }
.fq1-link { color: inherit; }
.fq1-link:hover { color: var(--accent); }

.nv5-bar { position: absolute; top: 0; left: 0; right: 0; z-index: 1000; padding: 22px 0; background: linear-gradient(180deg, rgba(0,0,0,0.42), rgba(0,0,0,0)); }
.nv5-inner { display: flex; align-items: center; justify-content: space-between; gap: 18px; }
.nv5-logo { display: flex; align-items: center; gap: 9px; color: #fff; text-decoration: none; white-space: nowrap; text-shadow: 0 2px 10px rgba(0,0,0,0.72); }
.nv5-ico { font-size: 24px; line-height: 1; }
.nv5-kw { font-size: 22px; font-weight: 800; letter-spacing: 2px; }
.nv5-kw em { font-style: normal; color: var(--gold); }
.nv5-brand { font-size: 12px; color: rgba(255,255,255,0.86); padding-left: 9px; border-left: 1px solid rgba(255,255,255,0.5); }
.nv5-menu { display: flex; align-items: center; justify-content: flex-end; flex-wrap: wrap; gap: 8px; list-style: none; }
.nv5-menu a { display: block; padding: 7px 16px; font-size: 13px; color: #fff; text-decoration: none; border: 1px solid rgba(255,255,255,0.6); border-radius: 999px; background: rgba(0,0,0,0.18); text-shadow: 0 1px 6px rgba(0,0,0,0.7); }
.nv5-menu a:hover { background: rgba(255,255,255,0.26); border-color: #fff; }
@media (max-width:768px) {
    .nv5-bar { padding: 14px 0; }
    .nv5-inner { flex-wrap: wrap; justify-content: center; gap: 10px; }
    .nv5-ico { font-size: 20px; }
    .nv5-kw { font-size: 18px; letter-spacing: 1px; }
    .nv5-brand { font-size: 11px; }
    .nv5-menu { justify-content: center; width: 100%; gap: 6px; }
    .nv5-menu a { padding: 5px 12px; font-size: 12px; }
}
.hr7-hero {
    padding: 80px 0;
    background: #fff;
}
.hr7-stack {
    display: grid;
    grid-template-columns: 0.95fr 1.05fr;
    align-items: end;
}
.hr7-media {
    position: relative;
    grid-column: 2;
    grid-row: 1;
    padding-top: 30px;
}
.hr7-img {
    display: block;
    width: 100%;
    aspect-ratio: 16 / 10;
    object-fit: cover;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}
.hr7-badge {
    position: absolute;
    top: 8px;
    right: 18px;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border-radius: 999px;
    background: var(--accent);
    color: #fff;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 1px;
}
.hr7-card {
    position: relative;
    z-index: 2;
    grid-column: 1;
    grid-row: 1;
    margin-right: -80px;
    margin-bottom: 62px;
    padding: 42px 38px 38px;
    border-top: 5px solid var(--accent);
    border-radius: var(--radius);
    background: #fff;
    box-shadow: 0 20px 50px rgba(0,0,0,0.16);
}
.hr7-title {
    margin-bottom: 18px;
    color: var(--primary);
    font-size: 36px;
    font-weight: 800;
    line-height: 1.28;
}
.hr7-title span {
    display: block;
    margin-top: 8px;
    color: var(--accent);
    font-size: 22px;
    font-weight: 700;
    letter-spacing: 3px;
}
.hr7-desc {
    margin-bottom: 26px;
    color: #555;
    font-size: 15px;
    line-height: 1.85;
}
.hr7-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 30px;
    border-radius: var(--radius);
    background: var(--primary);
    color: #fff;
    font-size: 15px;
    font-weight: 700;
    transition: background 0.3s ease, transform 0.3s ease;
}
.hr7-btn:hover {
    background: var(--accent);
    color: #fff;
    transform: translateY(-2px);
}
@media (max-width: 768px) {
    .hr7-hero {
        padding: 46px 0;
    }
    .hr7-stack {
        grid-template-columns: 1fr;
    }
    .hr7-media {
        grid-column: 1;
        grid-row: 1;
        padding-top: 0;
    }
    .hr7-img {
        aspect-ratio: 16 / 11;
    }
    .hr7-badge {
        top: 12px;
        right: 12px;
        font-size: 12px;
        padding: 6px 12px;
    }
    .hr7-card {
        grid-column: 1;
        grid-row: 2;
        margin: -34px 14px 0;
        padding: 26px 20px 24px;
    }
    .hr7-title {
        font-size: 24px;
        margin-bottom: 12px;
    }
    .hr7-title span {
        font-size: 16px;
        letter-spacing: 1px;
    }
    .hr7-desc {
        margin-bottom: 18px;
        font-size: 14px;
        line-height: 1.72;
    }
    .hr7-btn {
        padding: 11px 24px;
        font-size: 14px;
    }
}
.it1-wrap { display: grid; grid-template-columns: 1.15fr .85fr; gap: 56px; align-items: center; }
.it1-text .sec-sub { color: #666; margin-bottom: 22px; }
.it1-text p { color: #555; line-height: 1.9; font-size: 15px; margin-bottom: 14px; }
.it1-text p:last-child { margin-bottom: 0; }
.it1-text p strong { color: var(--primary); }
.it1-stats { display: flex; flex-direction: column; gap: 16px; }
.it1-stat { display: flex; align-items: baseline; gap: 14px; padding: 20px 22px; background: var(--light); border-left: 4px solid var(--accent); border-radius: var(--radius); }
.it1-num { font-size: 34px; line-height: 1; font-weight: 800; color: var(--primary); }
.it1-lbl { font-size: 14px; color: #666; }
@media (max-width: 768px) {
    .it1-wrap { grid-template-columns: 1fr; gap: 28px; }
    .it1-stats { flex-direction: column; gap: 12px; }
    .it1-stat { padding: 16px 18px; }
    .it1-num { font-size: 26px; }
}
.wk7-cards {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 30px;
}
.wk7-cards .wk1-item {
    display: flex;
    flex-direction: column;
    background: #fff;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: transform 0.35s ease, box-shadow 0.35s ease;
}
.wk7-cards .wk1-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 24px 48px rgba(15,23,42,0.18);
}
.wk7-cards .wk1-thumb {
    position: relative;
    aspect-ratio: 16 / 9;
    overflow: hidden;
    background: var(--light);
}
.wk7-cards .wk1-thumb::after {
    content: '';
    position: absolute;
    inset: 0;
    z-index: 1;
    background: linear-gradient(180deg, rgba(15,23,42,0) 52%, rgba(15,23,42,0.55) 100%);
}
.wk7-cards .wk1-thumb img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
}
.wk7-cards .wk1-item:hover .wk1-thumb img {
    transform: scale(1.06);
}
.wk7-cards .wk1-badge {
    position: absolute;
    top: 16px;
    left: 16px;
    z-index: 2;
    padding: 6px 15px;
    border-radius: 999px;
    background: var(--gold);
    color: #1f2937;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 1px;
}
.wk7-cards .wk1-idx {
    position: absolute;
    right: 18px;
    bottom: 12px;
    z-index: 2;
    color: #fff;
    font-size: 36px;
    font-weight: 800;
    line-height: 1;
    opacity: 0.85;
}
.wk7-cards .wk1-info {
    display: flex;
    flex-direction: column;
    flex: 1;
    padding: 24px 26px 26px;
}
.wk7-cards .wk1-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
}
.wk7-cards .wk1-title {
    margin: 0;
    color: var(--primary);
    font-size: 24px;
    font-weight: 700;
    line-height: 1.34;
}
.wk7-cards .wk1-tag {
    flex: none;
    padding: 4px 13px;
    border-radius: 999px;
    background: var(--light);
    color: var(--secondary);
    font-size: 12px;
}
.wk7-cards .wk1-meta {
    margin-top: 10px;
    color: var(--gray);
    font-size: 14px;
    letter-spacing: 0.5px;
}
.wk7-cards .wk1-desc {
    margin: 14px 0 22px;
    color: var(--gray);
    font-size: 14px;
    line-height: 1.85;
}
.wk7-cards .wk1-btn {
    align-self: flex-start;
    margin-top: auto;
    padding: 11px 30px;
    border: none;
    border-radius: 999px;
    background: var(--accent);
    color: #fff;
    font-size: 14px;
    font-weight: 700;
    letter-spacing: 1px;
    cursor: pointer;
    transition: background 0.25s ease, transform 0.25s ease;
}
.wk7-cards .wk1-btn:hover {
    background: var(--primary);
    transform: translateX(4px);
}
@media (max-width: 768px) {
    .wk7-cards {
        grid-template-columns: minmax(0, 1fr);
        gap: 18px;
    }
    .wk7-cards .wk1-badge {
        top: 10px;
        left: 10px;
        padding: 4px 11px;
    }
    .wk7-cards .wk1-idx {
        right: 12px;
        bottom: 8px;
        font-size: 24px;
    }
    .wk7-cards .wk1-info {
        padding: 16px;
    }
    .wk7-cards .wk1-title {
        font-size: 18px;
    }
    .wk7-cards .wk1-meta {
        margin-top: 6px;
        font-size: 12px;
    }
    .wk7-cards .wk1-desc {
        margin: 10px 0 14px;
        font-size: 13px;
        line-height: 1.75;
    }
    .wk7-cards .wk1-btn {
        padding: 9px 22px;
        font-size: 13px;
    }
}
.ad6-split{display:grid;grid-template-columns:minmax(260px,340px) 1fr;column-gap:56px;align-items:start}
.ad6-split .ad6-side{position:sticky;top:80px}
.ad6-split .ad6-list{border-top:1px solid #e6eaf0}
.ad6-split .ad6-list > .ad1-item{position:relative;display:grid;grid-template-columns:auto 1fr;column-gap:18px;row-gap:8px;padding:24px 0;border-bottom:1px solid #e6eaf0}
.ad6-split .ad6-list > .ad1-item:last-child{border-bottom:0}
.ad6-split .ad1-toggle{display:none}
.ad6-split .ad1-icon{grid-column:1;grid-row:1 / span 2;width:54px;height:54px;border-radius:14px;background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center;font-size:22px;line-height:1;transition:background .3s ease}
.ad6-split .ad6-list > .ad1-item:hover .ad1-icon{background:var(--accent)}
.ad6-split .ad1-num{position:absolute;top:24px;right:0;font-size:30px;font-weight:800;line-height:1;color:#eef1f6;pointer-events:none}
.ad6-split .ad1-label{display:inline}
.ad6-split .ad1-title{grid-column:2;grid-row:1;font-size:18px;font-weight:700;color:var(--primary);margin:0;padding-right:46px;line-height:1.4}
.ad6-split .ad1-desc{grid-column:2;grid-row:2;font-size:14px;line-height:1.8;color:#666;margin:0}
@media (max-width:768px){
  .ad6-split{grid-template-columns:1fr;row-gap:26px}
  .ad6-split .ad6-side{position:static;top:auto}
  .ad6-split .ad6-list > .ad1-item{padding:18px 0;column-gap:14px}
  .ad6-split .ad1-icon{width:44px;height:44px;font-size:18px;border-radius:12px}
  .ad6-split .ad1-num{top:18px;font-size:22px}
  .ad6-split .ad1-title{font-size:16px;padding-right:34px}
  .ad6-split .ad1-desc{font-size:13px;line-height:1.75}
}
.nw1-list { border-top:1px solid #e8ecf2 }
.nw1-list .nw1-item { display:flex; align-items:center; gap:20px; padding:18px 14px; border-bottom:1px solid #e8ecf2; text-decoration:none; transition:background .25s ease, padding .25s ease, border-color .25s ease }
.nw1-list .nw1-date { flex:none; width:104px; font-size:13px; letter-spacing:.5px; color:var(--gray); transition:color .25s ease }
.nw1-list .nw1-title { flex:1; min-width:0; font-size:16px; line-height:1.5; font-weight:600; color:var(--primary); transition:color .25s ease }
.nw1-list .nw1-idx { flex:none; min-width:22px; text-align:right; font-size:13px; color:#c9d2dd; transition:color .25s ease }
.nw1-list .nw1-item:hover { padding-left:22px; background:#f5f7fa; border-bottom-color:var(--accent) }
.nw1-list .nw1-item:hover .nw1-title { color:var(--accent) }
.nw1-list .nw1-item:hover .nw1-date { color:var(--primary) }
.nw1-list .nw1-item:hover .nw1-idx { color:var(--accent) }
@media (max-width:768px) {
    .nw1-list .nw1-item { flex-wrap:wrap; gap:6px 12px; padding:14px 10px }
    .nw1-list .nw1-date { width:auto; font-size:12px }
    .nw1-list .nw1-title { flex:1 1 100%; order:2; font-size:15px; line-height:1.55 }
    .nw1-list .nw1-idx { margin-left:auto; font-size:12px }
    .nw1-list .nw1-item:hover { padding-left:14px }
}
.fq4-cards { display:flex; flex-direction:column; gap:18px; max-width:940px; margin:0 auto }
.fq4-cards .fq1-item { background:#fff; border:1px solid #e2e8f0; border-left:4px solid #e2e8f0; border-radius:var(--radius); box-shadow:var(--shadow); transition:border-color .3s ease }
.fq4-cards .fq1-item.open { border-left-color:var(--accent) }
.fq4-cards .fq1-q { display:flex; align-items:flex-start; gap:10px; padding:18px 20px; font-size:16px; line-height:1.6; font-weight:700; color:var(--primary); cursor:pointer }
.fq4-cards .fq1-q::before { content:"Q"; flex:none; display:flex; align-items:center; justify-content:center; width:30px; height:30px; border-radius:50%; background:var(--primary); color:#fff; font-size:13px; font-weight:700; line-height:1 }
.fq4-cards .fq1-no { flex:none; color:var(--accent); font-size:12px; font-weight:700; line-height:30px; letter-spacing:1px }
.fq4-cards .fq1-a { max-height:0; overflow:hidden; transition:max-height .4s ease }
.fq4-cards .fq1-item.open .fq1-a { max-height:520px }
.fq4-cards .fq1-a-in { display:flex; align-items:flex-start; gap:10px; padding:0 20px 20px; font-size:14px; line-height:1.85; color:var(--gray) }
.fq4-cards .fq1-a-in::before { content:"A"; flex:none; display:flex; align-items:center; justify-content:center; width:30px; height:30px; border-radius:50%; background:var(--accent); color:#fff; font-size:13px; font-weight:700; line-height:1 }
@media (max-width:768px) {
    .fq4-cards { gap:12px }
    .fq4-cards .fq1-q { gap:8px; padding:14px; font-size:15px }
    .fq4-cards .fq1-q::before { width:26px; height:26px; font-size:12px }
    .fq4-cards .fq1-no { font-size:11px; line-height:26px }
    .fq4-cards .fq1-item.open .fq1-a { max-height:640px }
    .fq4-cards .fq1-a-in { gap:8px; padding:0 14px 16px; font-size:13px }
    .fq4-cards .fq1-a-in::before { width:26px; height:26px; font-size:12px }
}
.cm8-flow { position:relative; padding-left:6px }
.cm8-flow::before { content:""; position:absolute; top:8px; bottom:8px; left:32px; width:2px; background:linear-gradient(180deg,var(--accent),rgba(15,23,42,.06)) }
.cm8-flow .cm1-item { position:relative; padding:0 0 30px 84px; min-height:64px }
.cm8-flow .cm1-item:last-child { padding-bottom:0 }
.cm8-flow .cm1-head { position:absolute; left:0; top:0; display:flex; flex-direction:column; align-items:center; gap:6px; width:64px }
.cm8-flow .cm1-av { width:46px; height:46px; border-radius:50%; object-fit:cover; background:var(--light); border:3px solid #fff; box-shadow:0 4px 12px rgba(15,23,42,.16) }
.cm8-flow .cm1-who { display:flex; flex-direction:column; align-items:center; gap:1px; width:100% }
.cm8-flow .cm1-name { font-size:11px; font-weight:600; line-height:1.35; text-align:center; color:var(--primary); word-break:break-all }
.cm8-flow .cm1-date { font-size:11px; color:var(--gray); white-space:nowrap }
.cm8-flow .cm1-text { margin:0; padding:16px 20px; background:#fff; border:1px solid #e8ecf2; border-left:3px solid var(--accent); border-radius:0 var(--radius) var(--radius) 0; box-shadow:var(--shadow); font-size:14px; line-height:1.85; color:#4b5563 }
.cm8-flow .cm1-item:nth-child(even) .cm1-text { border-left-color:var(--secondary) }
.cm8-flow .cm1-idx { display:none }
.cm8-flow .cm1-initial { position:absolute; right:16px; bottom:10px; font-size:44px; font-weight:700; line-height:1; color:var(--light); pointer-events:none }
@media (max-width:768px) {
    .cm8-flow { padding-left:0 }
    .cm8-flow::before { left:22px }
    .cm8-flow .cm1-item { padding:0 0 22px 58px }
    .cm8-flow .cm1-head { width:46px; gap:4px }
    .cm8-flow .cm1-av { width:36px; height:36px; border-width:2px }
    .cm8-flow .cm1-name { font-size:10px }
    .cm8-flow .cm1-date { font-size:10px }
    .cm8-flow .cm1-text { padding:12px 14px; font-size:13px; line-height:1.75 }
    .cm8-flow .cm1-initial { font-size:30px; right:12px; bottom:8px }
}
.ft4-foot { background: var(--primary); color: rgba(255,255,255,0.68); }
.ft4-top { display: grid; grid-template-columns: 1.6fr 1fr 1.1fr; gap: 34px; padding: 46px 20px 34px; }
.ft4-logo { display: inline-flex; align-items: center; gap: 8px; color: #fff; text-decoration: none; }
.ft4-ico { font-size: 20px; line-height: 1; }
.ft4-kw { font-size: 19px; font-weight: 800; letter-spacing: 1px; }
.ft4-kw em { font-style: normal; color: var(--gold); }
.ft4-brand { font-size: 11px; color: rgba(255,255,255,0.44); padding-left: 8px; border-left: 1px solid rgba(255,255,255,0.2); white-space: nowrap; }
.ft4-line { margin-top: 15px; font-size: 13px; line-height: 1.95; color: rgba(255,255,255,0.6); }
.ft4-h { margin-bottom: 15px; font-size: 14px; font-weight: 700; color: #fff; letter-spacing: 1px; }
.ft4-menu { list-style: none; }
.ft4-menu li { margin-bottom: 9px; }
.ft4-menu a { font-size: 13px; color: rgba(255,255,255,0.66); text-decoration: none; }
.ft4-menu a:hover { color: var(--gold); }
.ft4-tags { display: flex; flex-wrap: wrap; gap: 8px; list-style: none; }
.ft4-tags li { padding: 4px 12px; font-size: 12px; color: #fff; border: 1px solid rgba(255,255,255,0.26); border-radius: 999px; }
.ft4-bar { background: rgba(0,0,0,0.26); }
.ft4-barin { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 14px 20px; font-size: 12px; color: rgba(255,255,255,0.56); }
.ft4-copy b { font-weight: 600; color: var(--gold); letter-spacing: 1px; }
@media (max-width:768px) {
    .ft4-top { grid-template-columns: 1fr; gap: 26px; padding: 30px 20px 24px; }
    .ft4-ico { font-size: 18px; }
    .ft4-kw { font-size: 17px; }
    .ft4-brand { font-size: 10px; }
    .ft4-line { margin-top: 11px; font-size: 12px; }
    .ft4-h { margin-bottom: 11px; font-size: 13px; }
    .ft4-menu li { margin-bottom: 8px; }
    .ft4-menu a { font-size: 12px; }
    .ft4-tags li { padding: 3px 10px; font-size: 11px; }
    .ft4-barin { flex-direction: column; gap: 6px; text-align: center; padding: 12px 20px; }
    .ft4-copy { font-size: 11px; }
}


@media (max-width: 768px) {
    .sec { padding: 50px 0; }
    .sec-title { font-size: 26px; }
}